Message:23246 In: SPACWX.USA
From: N4SDDate: Fri, 29 May 26 12:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <14567_N4SD>
Path: N2MH4|N3MEL|N3FUD|N3IP|KA3VSP|N4SD
R:260529/1559Z 31766@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260529/1559Z 17981@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260529/1553Z 9714@N3FUD.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260529/1553Z 68057@N3IP.#SEPA.PA.USA.NOAM BPQK6.0.24
R:260529/1547Z 2681@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260529/1232Z 14567@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 291231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 May 29 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 29-May 31 2026 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown May 29-May 31 2026
May 29 May 30 May 31
00-03UT 2.67 2.33 3.00
03-06UT 3.00 2.00 2.33
06-09UT 2.33 1.33 2.33
09-12UT 3.67 1.33 1.67
12-15UT 2.00 2.67 3.33
15-18UT 2.33 2.33 2.67
18-21UT 2.67 3.00 4.00
21-00UT 3.67 3.00 3.67
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 29-May 31 2026
May 29 May 30 May 31
S1 or greater 5% 5% 5%
Rationale: No S1 (Minor) or greater solar radiation storms are expected.
C. NOAA Radio Blackout Activity and Forecast
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at May 29 2026 0704 UTC.
Radio Blackout Forecast for May 29-May 31 2026
May 29 May 30 May 31
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
through 31 May.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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