Space Weather Alerts from SWPC

NOAA / Space Weather Prediction Center

	Space Weather Alerts
	Alerts/Displays - Archive - Email Registration - Help/Samples

Alerts in Graphical Timelines: Past 7 days and Currently in Effect
Alerts in Text Format: Current month and Previous month

Alerts Issued in May 2013

Space Weather Message Code: ALTTP2
Serial Number: 855
Issue Time: 2013 May 20 1216 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 20 1141 UTC
Estimated Velocity: 1061 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: WATA30
Serial Number: 107
Issue Time: 2013 May 20 1155 UTC

CANCEL WATCH: Geomagnetic Storm Category G2 Predicted
Cancel Serial Number: 106
Original Issue Time: 2013 May 19 1855 UTC

Comment: Canceling watch for G2 Geomagnetic Storming on 20 May as data suggests CME has already passed.
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: SUMSUD
Serial Number: 172
Issue Time: 2013 May 19 2322 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 May 19 2306 UTC
Deviation: 39 nT
Station: Boulder

Space Weather Message Code: WARK05
Serial Number: 838
Issue Time: 2013 May 19 2317 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 19 2320 UTC
Valid To: 2013 May 20 0700 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: WARK04
Serial Number: 2085
Issue Time: 2013 May 19 2317 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2084
Valid From: 2013 May 19 0205 UTC
Now Valid Until: 2013 May 20 1300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARSUD
Serial Number: 130
Issue Time: 2013 May 19 2229 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2013 May 19 2251 UTC
Valid To: 2013 May 19 2351 UTC
IP Shock Passage Observed: 2013 May 19 2221 UTC

Space Weather Message Code: WATA30
Serial Number: 106
Issue Time: 2013 May 19 1855 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 20: G2 (Moderate) May 21: None (Below G1) May 22: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: WARK04
Serial Number: 2084
Issue Time: 2013 May 19 1149 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2083
Valid From: 2013 May 19 0205 UTC
Now Valid Until: 2013 May 20 0100 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: ALTK04
Serial Number: 1639
Issue Time: 2013 May 19 0207 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 19 0205 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK04
Serial Number: 2083
Issue Time: 2013 May 19 0203 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 19 0205 UTC
Valid To: 2013 May 19 1200 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: SUMPX1
Serial Number: 67
Issue Time: 2013 May 18 2207 UTC

SUMMARY: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2013 May 15 1325 UTC
Maximum Time: 2013 May 17 1720 UTC
End Time: 2013 May 18 1445 UTC
Maximum 10MeV Flux: 41 pfu
NOAA Scale: S1 - Minor

Space Weather Message Code: WARK05
Serial Number: 837
Issue Time: 2013 May 18 0531 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 836
Valid From: 2013 May 18 0252 UTC
Now Valid Until: 2013 May 18 0900 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: WARK04
Serial Number: 2082
Issue Time: 2013 May 18 0302 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2081
Valid From: 2013 May 18 0100 UTC
Now Valid Until: 2013 May 18 1200 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: ALTK05
Serial Number: 714
Issue Time: 2013 May 18 0302 UTC

ALERT: Geomagnetic K-index of 5
Threshold Reached: 2013 May 18 0300 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: WARK05
Serial Number: 836
Issue Time: 2013 May 18 0254 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 18 0252 UTC
Valid To: 2013 May 18 0600 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: ALTK04
Serial Number: 1638
Issue Time: 2013 May 18 0133 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 18 0131 UTC
Synoptic Period: 0000-0300 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: SUMSUD
Serial Number: 171
Issue Time: 2013 May 18 0121 UTC

SUMMARY: Geomagnetic Sudden Impulse
Observed: 2013 May 18 0112 UTC
Deviation: 31 nT
Station: Boulder

Space Weather Message Code: WARK04
Serial Number: 2081
Issue Time: 2013 May 18 0033 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 18 0100 UTC
Valid To: 2013 May 18 0600 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARSUD
Serial Number: 129
Issue Time: 2013 May 18 0031 UTC

WARNING: Geomagnetic Sudden Impulse expected
Valid From: 2013 May 18 0115 UTC
Valid To: 2013 May 18 0145 UTC
IP Shock Passage Observed: 2013 May 18 0023 UTC

Space Weather Message Code: WATA30
Serial Number: 105
Issue Time: 2013 May 17 2124 UTC

WATCH: Geomagnetic Storm Category G2 Predicted
Highest Storm Level Predicted by Day:
May 18: None (Below G1) May 19: G2 (Moderate) May 20: None (Below G1)
THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT
Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.

Space Weather Message Code: ALTTP2
Serial Number: 854
Issue Time: 2013 May 17 0927 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 17 0850 UTC
Estimated Velocity: 376 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: ALTTP4
Serial Number: 416
Issue Time: 2013 May 17 0927 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 17 0850 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

Space Weather Message Code: SUM10R
Serial Number: 582
Issue Time: 2013 May 17 0926 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 17 0848 UTC
Maximum Time: 2013 May 17 0857 UTC
End Time: 2013 May 17 0912 UTC
Duration: 24 minutes
Peak Flux: 450 sfu
Latest Penticton Noon Flux: 145 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: WARPX1
Serial Number: 394
Issue Time: 2013 May 17 0825 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 393
Valid From: 2013 May 15 1232 UTC
Now Valid Until: 2013 May 18 2300 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Comment: 10 MeV Proton levels continue to persist at about 25 pfu.
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

Space Weather Message Code: WARK04
Serial Number: 2080
Issue Time: 2013 May 16 2033 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2079
Valid From: 2013 May 16 1605 UTC
Now Valid Until: 2013 May 17 0300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: ALTK04
Serial Number: 1637
Issue Time: 2013 May 16 1627 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 16 1623 UTC
Synoptic Period: 1500-1800 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK04
Serial Number: 2079
Issue Time: 2013 May 16 1607 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 16 1605 UTC
Valid To: 2013 May 16 2100 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARPX1
Serial Number: 393
Issue Time: 2013 May 16 1131 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 392
Valid From: 2013 May 15 1232 UTC
Now Valid Until: 2013 May 17 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

Space Weather Message Code: ALTK04
Serial Number: 1636
Issue Time: 2013 May 16 0401 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 16 0358 UTC
Synoptic Period: 0300-0600 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK04
Serial Number: 2078
Issue Time: 2013 May 16 0341 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 16 0345 UTC
Valid To: 2013 May 16 0900 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: ALTPX1
Serial Number: 300
Issue Time: 2013 May 15 1347 UTC

ALERT: Proton Event 10MeV Integral Flux exceeded 10pfu
Begin Time: 2013 May 15 1335 UTC
NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

Space Weather Message Code: WARPX1
Serial Number: 392
Issue Time: 2013 May 15 1233 UTC

WARNING: Proton 10MeV Integral Flux above 10pfu expected
Valid From: 2013 May 15 1232 UTC
Valid To: 2013 May 16 1200 UTC
Warning Condition: Onset
Predicted NOAA Scale: S1 - Minor
Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

Space Weather Message Code: ALTTP2
Serial Number: 853
Issue Time: 2013 May 15 0222 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 15 0137 UTC
Estimated Velocity: 501 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: SUMX01
Serial Number: 86
Issue Time: 2013 May 15 0211 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 15 0125 UTC
Maximum Time: 2013 May 15 0148 UTC
End Time: 2013 May 15 0158 UTC
X-ray Class: X1.2
Optical Class: 1b
Location: N11E63
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

Space Weather Message Code: SUM10R
Serial Number: 581
Issue Time: 2013 May 15 0203 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 15 0133 UTC
Maximum Time: 2013 May 15 0143 UTC
End Time: 2013 May 15 0150 UTC
Duration: 17 minutes
Peak Flux: 490 sfu
Latest Penticton Noon Flux: 148 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: ALTTP4
Serial Number: 415
Issue Time: 2013 May 15 0202 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 15 0135 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

Space Weather Message Code: ALTXMF
Serial Number: 190
Issue Time: 2013 May 15 0143 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 15 0141 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.

Space Weather Message Code: SUM10R
Serial Number: 580
Issue Time: 2013 May 14 0249 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 14 0200 UTC
Maximum Time: 2013 May 14 0203 UTC
End Time: 2013 May 14 0210 UTC
Duration: 10 minutes
Peak Flux: 370 sfu
Latest Penticton Noon Flux: 150 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: SUM10R
Serial Number: 579
Issue Time: 2013 May 14 0210 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 14 0134 UTC
Maximum Time: 2013 May 14 0141 UTC
End Time: 2013 May 14 0143 UTC
Duration: 9 minutes
Peak Flux: 190 sfu
Latest Penticton Noon Flux: 150 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: SUMX01
Serial Number: 85
Issue Time: 2013 May 14 0144 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 13 2359 UTC
Maximum Time: 2013 May 14 0111 UTC
End Time: 2013 May 14 0120 UTC
X-ray Class: X3.2
Optical Class: 2b
Location: N12E77
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

Space Weather Message Code: ALTTP2
Serial Number: 852
Issue Time: 2013 May 14 0138 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 14 0107 UTC
Estimated Velocity: 1514 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: SUM10R
Serial Number: 578
Issue Time: 2013 May 14 0137 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 14 0104 UTC
Maximum Time: 2013 May 14 0115 UTC
End Time: 2013 May 14 0120 UTC
Duration: 16 minutes
Peak Flux: 560 sfu
Latest Penticton Noon Flux: 150 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: ALTTP4
Serial Number: 414
Issue Time: 2013 May 14 0128 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 14 0113 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

Space Weather Message Code: ALTXMF
Serial Number: 189
Issue Time: 2013 May 14 0108 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 14 0105 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.

Space Weather Message Code: ALTTP2
Serial Number: 851
Issue Time: 2013 May 13 1701 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 13 1557 UTC
Estimated Velocity: 949 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: ALTTP4
Serial Number: 413
Issue Time: 2013 May 13 1701 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 13 1557 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

Space Weather Message Code: SUMX01
Serial Number: 84
Issue Time: 2013 May 13 1652 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 13 1548 UTC
Maximum Time: 2013 May 13 1605 UTC
End Time: 2013 May 13 1616 UTC
X-ray Class: X2.8
Optical Class: 1n
Location: N11E85
NOAA Scale: R3 - Strong
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

Space Weather Message Code: SUM10R
Serial Number: 577
Issue Time: 2013 May 13 1649 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 13 1553 UTC
Maximum Time: 2013 May 13 1601 UTC
End Time: 2013 May 13 1618 UTC
Duration: 25 minutes
Peak Flux: 520 sfu
Latest Penticton Noon Flux: 147 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: ALTXMF
Serial Number: 188
Issue Time: 2013 May 13 1559 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 13 1557 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.

Space Weather Message Code: ALTTP2
Serial Number: 850
Issue Time: 2013 May 13 0310 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 13 0210 UTC
Estimated Velocity: 2347 km/s

Comment: Speed is based on report from Learmonth with an error of +/- 583 km/s.
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: SUM10R
Serial Number: 576
Issue Time: 2013 May 13 0241 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 13 0208 UTC
Maximum Time: 2013 May 13 0219 UTC
End Time: 2013 May 13 0222 UTC
Duration: 14 minutes
Peak Flux: 320 sfu
Latest Penticton Noon Flux: 147 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: SUMX01
Serial Number: 83
Issue Time: 2013 May 13 0237 UTC

SUMMARY: X-ray Event exceeded X1
Begin Time: 2013 May 13 0153 UTC
Maximum Time: 2013 May 13 0217 UTC
End Time: 2013 May 13 0232 UTC
X-ray Class: X1.7
Location: N15E90
NOAA Scale: R3 - Strong

Comment: This event originated from an unnumbered region from around the east limb at about N15.
Potential Impacts: Area of impact consists of large portions of the sunlit side of Earth, strongest at the sub-solar point.
Radio - Wide area blackout of HF (high frequency) radio communication for about an hour.

Space Weather Message Code: ALTXMF
Serial Number: 187
Issue Time: 2013 May 13 0206 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 13 0204 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.

Space Weather Message Code: WARK04
Serial Number: 2077
Issue Time: 2013 May 06 0935 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 06 1000 UTC
Valid To: 2013 May 06 1500 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: ALTEF3
Serial Number: 2012
Issue Time: 2013 May 04 0911 UTC

CONTINUED ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Continuation of Serial Number: 2011
Begin Time: 2013 May 03 1120 UTC
Yesterday Maximum 2MeV Flux: 1906 pfu
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: ALTTP4
Serial Number: 412
Issue Time: 2013 May 03 1940 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 03 1847 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

Space Weather Message Code: SUMXM5
Serial Number: 102
Issue Time: 2013 May 03 1839 UTC

SUMMARY: X-ray Event exceeded M5
Begin Time: 2013 May 03 1724 UTC
Maximum Time: 2013 May 03 1732 UTC
End Time: 2013 May 03 1741 UTC
X-ray Class: M5.7
Optical Class: sf
Location: N16E81
NOAA Scale: R2 - Moderate

Comment: New Region 1739.
Potential Impacts: Area of impact centered primarily on sub-solar point on the sunlit side of Earth.
Radio - Limited blackout of HF (high frequency) radio communication for tens of minutes.

Space Weather Message Code: ALTTP2
Serial Number: 849
Issue Time: 2013 May 03 1819 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 03 1745 UTC
Estimated Velocity: 1297 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: ALTXMF
Serial Number: 186
Issue Time: 2013 May 03 1732 UTC

ALERT: X-Ray Flux exceeded M5
Threshold Reached: 2013 May 03 1729 UTC
NOAA Scale: R2 - Moderate
Potential Impacts: Area of impact centered on sub-solar point on the sunlit side of Earth. Extent of blackout of HF (high frequency) radio communication dependent upon current X-ray Flux intensity. For real-time information on affected area and expected duration please see http://www.swpc.noaa.gov/drap/index.html.

Space Weather Message Code: ALTTP4
Serial Number: 411
Issue Time: 2013 May 03 1607 UTC

ALERT: Type IV Radio Emission
Begin Time: 2013 May 03 1516 UTC
Description: Type IV emissions occur in association with major eruptions on the sun and are typically associated with strong coronal mass ejections and solar radiation storms.

Space Weather Message Code: ALTEF3
Serial Number: 2011
Issue Time: 2013 May 03 1301 UTC

ALERT: Electron 2MeV Integral Flux exceeded 1000pfu
Threshold Reached: 2013 May 03 1120 UTC
Station: GOES13
Potential Impacts: Satellite systems may experience significant charging resulting in increased risk to satellite systems.

Space Weather Message Code: ALTTP2
Serial Number: 848
Issue Time: 2013 May 02 0551 UTC

ALERT: Type II Radio Emission
Begin Time: 2013 May 02 0506 UTC
Estimated Velocity: 703 km/s
Description: Type II emissions occur in association with eruptions on the sun and typically indicate a coronal mass ejection is associated with a flare event.

Space Weather Message Code: SUM10R
Serial Number: 575
Issue Time: 2013 May 02 0521 UTC

SUMMARY: 10cm Radio Burst
Begin Time: 2013 May 02 0502 UTC
Maximum Time: 2013 May 02 0505 UTC
End Time: 2013 May 02 0505 UTC
Duration: 3 minutes
Peak Flux: 240 sfu
Latest Penticton Noon Flux: 159 sfu
Description: A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

Space Weather Message Code: WARK04
Serial Number: 2076
Issue Time: 2013 May 02 0255 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2075
Valid From: 2013 May 01 0530 UTC
Now Valid Until: 2013 May 02 1500 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK04
Serial Number: 2075
Issue Time: 2013 May 01 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2074
Valid From: 2013 May 01 0530 UTC
Now Valid Until: 2013 May 02 0300 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK05
Serial Number: 835
Issue Time: 2013 May 01 1755 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 834
Valid From: 2013 May 01 0748 UTC
Now Valid Until: 2013 May 02 0000 UTC
Warning Condition: Persistence
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: WARK04
Serial Number: 2074
Issue Time: 2013 May 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-index of 4 expected
Extension to Serial Number: 2073
Valid From: 2013 May 01 0530 UTC
Now Valid Until: 2013 May 01 1800 UTC
Warning Condition: Onset

Comment: Conditions continue to exist for this warning.
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK05
Serial Number: 834
Issue Time: 2013 May 01 1143 UTC

EXTENDED WARNING: Geomagnetic K-index of 5 expected
Extension to Serial Number: 833
Valid From: 2013 May 01 0748 UTC
Now Valid Until: 2013 May 01 1800 UTC
Warning Condition: Onset

Comment: Conditions continue to exist for this warning.
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: WARK05
Serial Number: 833
Issue Time: 2013 May 01 0750 UTC

WARNING: Geomagnetic K-index of 5 expected
Valid From: 2013 May 01 0748 UTC
Valid To: 2013 May 01 1200 UTC
Warning Condition: Onset
NOAA Scale: G1 - Minor
Potential Impacts: Area of impact primarily poleward of 60 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Spacecraft - Minor impact on satellite operations possible.
Aurora - Aurora may be visible at high latitudes, i.e., northern tier of the U.S. such as northern Michigan and Maine.

Space Weather Message Code: ALTK04
Serial Number: 1635
Issue Time: 2013 May 01 0747 UTC

ALERT: Geomagnetic K-index of 4
Threshold Reached: 2013 May 01 0745 UTC
Synoptic Period: 0600-0900 UTC
Active Warning: Yes
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.

Space Weather Message Code: WARK04
Serial Number: 2073
Issue Time: 2013 May 01 0521 UTC

WARNING: Geomagnetic K-index of 4 expected
Valid From: 2013 May 01 0530 UTC
Valid To: 2013 May 01 1200 UTC
Warning Condition: Onset
Potential Impacts: Area of impact primarily poleward of 65 degrees Geomagnetic Latitude.
Induced Currents - Weak power grid fluctuations can occur.
Aurora - Aurora may be visible at high latitudes such as Canada and Alaska.