Message:22947 In: SPACWX.USA
From: N4SDDate: Sat, 23 May 26 12:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <13944_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260523/1321Z 31586@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260523/1321Z 17710@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260523/1317Z 2432@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260523/1231Z 13944@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 231231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 May 23 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 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 23-May 25 2026 is 2.33 (below NOAA
Scale levels).
NOAA Kp index breakdown May 23-May 25 2026
May 23 May 24 May 25
00-03UT 1.00 1.67 1.67
03-06UT 1.00 1.67 1.33
06-09UT 1.33 1.33 1.33
09-12UT 0.67 1.33 1.33
12-15UT 1.67 1.33 1.67
15-18UT 2.00 1.33 1.33
18-21UT 2.33 1.33 1.67
21-00UT 2.33 1.67 1.33
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-19 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for May 23-May 25 2026
May 23 May 24 May 25
S1 or greater 5% 5% 5%
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 May 23-May 25 2026
May 23 May 24 May 25
R1-R2 25% 25% 25%
R3 or greater 5% 5% 5%
Rationale: There exists a chance for R1-R2 (Minor-Moderate) radio
blackouts over 23-25 May.
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73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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