Message 29115 in SPACWX.USA
From: N4SD
Date: Mon, 31 Aug 26 12:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <21638_N4SD>
Path: K7EK|K5DAT|WW6Q|W9GM|KA3BVJ|N3IP|KA3VSP|N4SD
R:260831/1425z @:K7EK.#NOKY.KY.USA.NOAM $:21638_N4SD
R:260831/1422Z 51445@K5DAT.#NEWI.WI.USA.NOAM LinBPQ6.0.25
R:260831/1421Z 58975@WW6Q.#NEIN.IN.USA.NOAM LinBPQ6.0.25
R:260831/1421Z 8571@W9GM.#SWWI.WI.USA.NOAM BPQ6.0.24
R:260831/1421Z 86141@KA3BVJ.#EPA.PA.USA.NOAM BPQ1.4.65
R:260831/1421Z 73664@N3IP.#SEPA.PA.USA.NOAM BPQK6.0.24
R:260831/1417Z 7282@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260831/1231Z 21638@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 311231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Aug 31 1230 UTC
# Prepared by the US Dept. of Commerce, NOAA, Space Weather Prediction Center
# Product description and SWPC contact on the Web
# http://www.swpc.noaa.gov/wwire.html
#
# 3-Day Forecast
#
A. NOAA Geomagnetic Activity Observation and Forecast
The greatest observed 3 hr Kp over the past 24 hours was 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Aug 31-Sep 02 2026 is 3.67 (below NOAA
Scale levels).
NOAA Kp index breakdown Aug 31-Sep 02 2026
Aug 31 Sep 01 Sep 02
00-03UT 3.00 1.67 1.67
03-06UT 3.33 1.67 1.67
06-09UT 3.33 1.67 1.67
09-12UT 3.33 1.33 1.33
12-15UT 3.67 1.33 1.33
15-18UT 1.67 0.67 0.67
18-21UT 0.67 1.33 1.33
21-00UT 1.67 1.67 1.67
Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No
significant transient or recurrent solar wind features are forecast.
B. NOAA Solar Radiation Activity Observation and Forecast
Solar radiation, as observed by NOAA GOES-18 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for Aug 31-Sep 02 2026
Aug 31 Sep 01 Sep 02
S1 or greater 1% 1% 1%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Aug 31-Sep 02 2026
Aug 31 Sep 01 Sep 02
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%
Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts on 31 Aug - 02 Sep.
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