Message:21235 In: SPACWX.USA
From: N4SDDate: Wed, 22 Apr 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <11696_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260422/0334Z 30480@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260422/0334Z 16098@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260422/0319Z 1080@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260422/0032Z 11696@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 220031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 22 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 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Apr 22-Apr 24 2026 is 3.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Apr 22-Apr 24 2026
Apr 22 Apr 23 Apr 24
00-03UT 2.67 2.33 2.33
03-06UT 2.00 2.00 2.67
06-09UT 2.33 2.00 2.67
09-12UT 2.00 2.00 1.67
12-15UT 2.00 0.67 1.33
15-18UT 2.33 2.00 2.00
18-21UT 2.00 2.67 2.00
21-00UT 2.00 3.00 2.33
Rationale: No G1 (Minor) or greater geomagnetic storms are expected as
the ongoing CH HSS effects wane.
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 22-Apr 24 2026
Apr 22 Apr 23 Apr 24
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 22-Apr 24 2026
Apr 22 Apr 23 Apr 24
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%
Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts in the next three days.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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