Message 29085 in SPACWX.USA
From: N4SD
Date: Mon, 31 Aug 26 00:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <21623_N4SD>
Path: N2MH4|WB4WPF|KA3VSP|N4SD
R:260831/0348Z 36364@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260831/0346Z 19391@WB4WPF.#SFL.FL.USA.NOAM LinBPQ6.0.25
R:260831/0337Z 7260@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260831/0031Z 21623@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 310031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Aug 31 0030 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Aug 31-Sep 02 2026 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Aug 31-Sep 02 2026
Aug 31 Sep 01 Sep 02
00-03UT 4.00 1.67 1.67
03-06UT 3.33 1.33 1.67
06-09UT 3.00 1.67 1.33
09-12UT 2.00 1.33 1.33
12-15UT 2.00 1.33 1.33
15-18UT 1.00 1.33 1.33
18-21UT 2.00 1.33 1.33
21-00UT 2.00 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 15% 10% 10%
R3 or greater 1% 1% 1%
Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts over 31 Aug - 02 Sep.
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