Message:21284 In: SPACWX.USA
From: N4SDDate: Thu, 23 Apr 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <11765_N4SD>
Path: N2MH4|N2MH|K5DAT|K5DAT|WW6Q|W9GM|KA3BVJ|KA3VSP|N4SD
R:260423/0302Z 30511@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260423/0301z @:N2MH.#NNJ.NJ.USA.NOAM [via Mesh] jnos 2.0p $:11765_N4SD
R:260423/0246Z @:K5DAT.NEWI.WI.USA.NA [ELK Grove Village, IL USA] #:4774 XrLin505c
R:260423/0246Z 36081@K5DAT.#NEWI.WI.USA.NOAM LinBPQ6.0.25
R:260423/0245Z 51568@WW6Q.#NEIN.IN.USA.NOAM LinBPQ6.0.25
R:260423/0245Z 57961@W9GM.#SWWI.WI.USA.NOAM BPQ6.0.25
R:260423/0239Z 80437@KA3BVJ.#EPA.PA.USA.NOAM BPQ1.4.65
R:260423/0220Z 1114@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260423/0032Z 11765@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 230031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 23 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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 23-Apr 25 2026 is 3.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Apr 23-Apr 25 2026
Apr 23 Apr 24 Apr 25
00-03UT 2.33 2.33 2.33
03-06UT 2.00 2.67 2.67
06-09UT 2.00 2.67 2.33
09-12UT 2.00 1.67 2.00
12-15UT 0.67 1.33 1.33
15-18UT 2.00 2.00 1.67
18-21UT 2.67 2.00 2.00
21-00UT 3.00 2.33 2.67
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 Apr 23-Apr 25 2026
Apr 23 Apr 24 Apr 25
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 23-Apr 25 2026
Apr 23 Apr 24 Apr 25
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%
Rationale: A slight chance for R1-R2 (Minor-Moderate) radio blackouts
will persist through 25 April primarily due to the flare potential
exhibited by Region 4420.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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