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Space Weather Prediction Center

National Oceanic and Atmospheric Administration

Thursday, March 19, 2026 21:14:21

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NOAA Scales mini

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Space Weather Conditions
on NOAA Scales
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
on NOAA Scales
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

G2 Watch for 19-21 March due to CME and CH HSS Effects

G2 Watch for 19-21 March due to CME and CH HSS Effects
G2 Watch for 19-21 March due to CME and CH HSS Effects
published: Thursday, March 19, 2026 13:53 UTC

A G2 Watch is in effect 19-21 March due to a mix of potential CME arrivals and CH HSS effects. While there is a high level of uncertainty related to the CME arrivals, there is more certainty regarding the likely CH HSS effects to begin by 21 March, with at least a G2 storm levels likely. There is at least a slight chance for G3 (Strong) storm conditions throughout this period. Continue to follow our webpage for the latest forecasts and updates about this activity.

DAP - temp Head Section