Message 27621 in SPACWX.USA
From: N4SD
Date: Sun, 09 Aug 26 12:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <20361_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260809/1347Z 35133@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260809/1347Z 23647@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260809/1344Z 6100@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260809/1231Z 20361@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 091231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Aug 09 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 6 (NOAA Scale
G2).
The greatest expected 3 hr Kp for Aug 09-Aug 11 2026 is 3.67 (below NOAA
Scale levels).
NOAA Kp index breakdown Aug 09-Aug 11 2026
Aug 09 Aug 10 Aug 11
00-03UT 2.67 2.33 2.67
03-06UT 2.33 2.67 3.00
06-09UT 1.67 2.00 2.33
09-12UT 2.33 2.00 1.67
12-15UT 2.00 2.00 2.00
15-18UT 2.00 2.00 2.00
18-21UT 3.33 2.00 3.00
21-00UT 3.33 2.33 3.67
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 09-Aug 11 2026
Aug 09 Aug 10 Aug 11
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 09-Aug 11 2026
Aug 09 Aug 10 Aug 11
R1-R2 5% 5% 5%
R3 or greater 1% 1% 1%
Rationale: No R1 (Minor) or greater radio blackouts are expected. No
significant active region flare activity is forecast.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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