Message:23197 In: SPACWX.USA
From: N4SDDate: Thu, 28 May 26 12:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <14504_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260528/1413Z 31736@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260528/1413Z 17937@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260528/1407Z 2635@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260528/1231Z 14504@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 281231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 May 28 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 28-May 30 2026 is 3.33 (below NOAA
Scale levels).
NOAA Kp index breakdown May 28-May 30 2026
May 28 May 29 May 30
00-03UT 2.00 3.33 2.00
03-06UT 2.33 3.00 2.00
06-09UT 2.67 1.67 1.33
09-12UT 3.67 2.00 1.00
12-15UT 2.00 2.00 1.00
15-18UT 1.67 1.67 1.67
18-21UT 2.67 2.33 2.33
21-00UT 1.67 2.33 2.33
Rationale: No G1 (Minor) or greater geomagnetic storms are expected.
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 May 28-May 30 2026
May 28 May 29 May 30
S1 or greater 5% 5% 5%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for May 28-May 30 2026
May 28 May 29 May 30
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
through 30 May.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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