Message:21330 In: SPACWX.USA
From: N4SDDate: Fri, 24 Apr 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <11824_N4SD>
Path: N2MH4|N2MH|K5DAT|K5DAT|WW6Q|W9GM|KA3BVJ|KA3VSP|N4SD
R:260424/0623Z 30542@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260424/0622z @:N2MH.#NNJ.NJ.USA.NOAM [via Mesh] jnos 2.0p $:11824_N4SD
R:260424/0620Z @:K5DAT.NEWI.WI.USA.NA [ELK Grove Village, IL USA] #:4809 XrLin505c
R:260424/0620Z 36160@K5DAT.#NEWI.WI.USA.NOAM LinBPQ6.0.25
R:260424/0619Z 51621@WW6Q.#NEIN.IN.USA.NOAM LinBPQ6.0.25
R:260424/0619Z 58043@W9GM.#SWWI.WI.USA.NOAM BPQ6.0.25
R:260424/0619Z 80475@KA3BVJ.#EPA.PA.USA.NOAM BPQ1.4.65
R:260424/0609Z 1157@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260424/0032Z 11824@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 240031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 24 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 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 24-Apr 26 2026 is 4.67 (NOAA Scale
G1).
NOAA Kp index breakdown Apr 24-Apr 26 2026
Apr 24 Apr 25 Apr 26
00-03UT 2.33 3.00 3.67
03-06UT 2.67 2.67 3.33
06-09UT 2.67 2.33 3.00
09-12UT 1.67 2.00 2.33
12-15UT 1.33 2.00 3.67
15-18UT 2.00 2.33 4.67 (G1)
18-21UT 2.00 3.33 4.33
21-00UT 2.33 3.67 3.33
Rationale: G1 (Minor) geomagnetic storms are likely on 26 Apr due to
anticipated influence from a CME that left the Sun on 23 Apr.
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 24-Apr 26 2026
Apr 24 Apr 25 Apr 26
S1 or greater 10% 10% 10%
Rationale: There exists a slight chance for S1 (Minor) or greater solar
radiation storms over 24-26 Apr.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Apr 23 2026 1708 UTC.
Radio Blackout Forecast for Apr 24-Apr 26 2026
Apr 24 Apr 25 Apr 26
R1-R2 55% 60% 60%
R3 or greater 10% 15% 15%
Rationale: R1-R2 (Minor-Moderate) radio blackouts remain likely, with a
slight chance for R3 (Strong), over 24-26 Apr.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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