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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Saturday, December 07, 2019 13:16:00

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NOAA Scales mini

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Space Weather Conditions
24-Hour Observed Maximums
R
no data
S
no data
G
no data
Latest Observed
R
no data
S
no data
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
R1-R2 --
R3-R5 --
S1 or greater --
G
no data
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R
no data
S
no data
G
no data
Current Space Weather Conditions
R1 (Minor) Radio Blackout Impacts
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HF Radio: Weak or minor degradation of HF radio communication on sunlit side, occasional loss of radio contact.
Navigation: Low-frequency navigation signals degraded for brief intervals.
More about the NOAA Space Weather Scales

Geomagnetic Storm Watches for 27-29 September

G1 Watch (27 and 29 Sep) G2 Watch (28 Sep)
Geomagnetic Storm Watches for 27-29 September
published: Monday, September 30, 2019 14:09 UTC

Geomagnetic Storm Watches have been issued for 27-29 September, 2019 UTC-days:

G1 (Minor) Storm Watch: Friday, September 27 UTC-day

G2 (Moderate) Storm Watch: Saturday, September 28 UTC-day

G1 (Minor) Storm Watch: Sunday, September 29 UTC-day

Geomagnetic activity is expected to rise on Friday, September 27 due to an increasingly disturbed solar wind field associated with effects of a positive polarity coronal hole high speed stream (CH HSS). The solar wind environment is anticipated to become enhanced and solar wind speeds are expected to climb towards 650 km/s later on the 27th; likely causing G1 storm conditions. Geomagnetic activity is expected to escalate further in reaction to  elevated solar wind speeds approaching 700 km/s, likely leading to G2 storm levels on Saturday, September 28. Enhanced activity is anticipated to continue into early Sunday, September 29 - with an early period of G1 storm levels likely.

Refer to our most current 3-Day Forecast for the latest timing information and the Forecast Discussion for more details about this activity.