Message:20630 In: SPACWX.USA
From: N4SDDate: Fri, 10 Apr 26 12:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <10884_N4SD>
Path: K7EK|NS2B|N3IP|KA3VSP|N4SD
R:260410/1848z @:K7EK.#NOKY.KY.USA.NOAM $:10884_N4SD
R:260410/1837Z 48906@NS2B.#WNY.NY.USA.NOAM BPQ6.0.25
R:260410/1837Z 65401@N3IP.#SEPA.PA.USA.NOAM BPQK6.0.24
R:260410/1834Z 56815@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260410/1232Z 10884@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 101231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 10 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 10-Apr 12 2026 is 4.67 (NOAA Scale
G1).
NOAA Kp index breakdown Apr 10-Apr 12 2026
Apr 10 Apr 11 Apr 12
00-03UT 4.00 3.67 3.67
03-06UT 2.67 4.67 (G1) 3.67
06-09UT 2.67 4.00 3.67
09-12UT 2.00 3.67 2.67
12-15UT 3.67 2.67 2.67
15-18UT 2.67 2.67 1.67
18-21UT 4.00 4.00 2.67
21-00UT 4.67 (G1) 4.67 (G1) 3.00
Rationale: Periods of G1 (Minor) geomagnetic storming are likely on
10-11 Apr due to +CH HSS influences.
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 Apr 10-Apr 12 2026
Apr 10 Apr 11 Apr 12
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 Apr 10-Apr 12 2026
Apr 10 Apr 11 Apr 12
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
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