Current conditions

:Product: Geophysical Alert Message wwv.txt
:Issued: 2026 Apr 13 1205 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
#          Geophysical Alert Message
#
Solar-terrestrial indices for 12 April follow.
Solar flux 99 and estimated planetary A-index 8.
The estimated planetary K-index at 1200 UTC on 13 April was 1.00.

No space weather storms were observed for the past 24 hours.

No space weather storms are predicted for the next 24 hours.

wwv alert messages

Last 25 or 250 wwv alert messages.

Solar activity and geomagnetic forecast

Geomagnetic 3 days forecast for high latitudes

planetary index (K)

UTC	00-03	03-06	06-09	09-12	12-15	15-18	18-21	21-00
2026 Apr 13	2	2	3	3	3	1	1	1
2026 Apr 14	2	2	2	4	3	1	1	1
2026 Apr 15	2	2	5	4	3	4	1	1

Probability of Geomagnetic conditions at high latitudes

	Active	Minor_Storm	Major-Severe_Storm
2026 Apr 13	15	25	25
2026 Apr 14	15	25	40
2026 Apr 15	15	30	45

Geomagnetic 3 days forecast for mid latitudes

planetary index (K)

UTC	00-03	03-06	06-09	09-12	12-15	15-18	18-21	21-00
2026 Apr 13	2	3	3	2	2	1	1	2
2026 Apr 14	3	3	2	2	2	1	1	2
2026 Apr 15	2	3	4	3	2	2	2	2

Probability of Geomagnetic conditions at mid latitudes

	Active	Minor_Storm	Major-Severe_Storm
2026 Apr 13	15	5	1
2026 Apr 14	30	10	1
2026 Apr 15	35	10	1

24-hour forecast of a polar cap absorption (PCA) event

Green
No active sunspot region on the Sun is likely to produce a PCA event in the 24 hours.

Computed daily at 23h00Utc from datas issued from SEC.
f5len.org (c 2004-2010)

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