Current conditions

:Product: Geophysical Alert Message wwv.txt
:Issued: 2026 May 16 1505 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
#
#          Geophysical Alert Message
#
Solar-terrestrial indices for 15 May follow.
Solar flux 101 and estimated planetary A-index 35.
The estimated planetary K-index at 1500 UTC on 16 May was 2.33.

Space weather for the past 24 hours has been moderate.
Geomagnetic storms reaching the G2 level occurred.

Space weather for the next 24 hours is predicted to be moderate.
Geomagnetic storms reaching the G2 level are likely.

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 May 16	3	3	4	5	5	4	2	3
2026 May 17	2	4	4	5	4	5	3	2
2026 May 18	3	3	2	3	4	4	3	2

Probability of Geomagnetic conditions at high latitudes

	Active	Minor_Storm	Major-Severe_Storm
2026 May 16	5	25	65
2026 May 17	5	25	70
2026 May 18	10	30	50

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 May 16	4	3	3	3	3	3	2	4
2026 May 17	3	4	3	3	3	3	3	2
2026 May 18	3	3	2	2	3	3	3	3

Probability of Geomagnetic conditions at mid latitudes

	Active	Minor_Storm	Major-Severe_Storm
2026 May 16	35	30	15
2026 May 17	40	30	10
2026 May 18	35	20	5

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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