Message:23086 In: SPACWX.USA
From: N4SDDate: Tue, 26 May 26 00:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <14207_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260526/0358Z 31668@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260526/0358Z 17841@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260526/0335Z 2534@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260526/0031Z 14207@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 260031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 May 26 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 3 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 26-May 28 2026 is 3.67 (below NOAA
Scale levels).
NOAA Kp index breakdown May 26-May 28 2026
May 26 May 27 May 28
00-03UT 1.67 2.67 3.00
03-06UT 1.67 3.67 3.67
06-09UT 2.00 3.00 3.00
09-12UT 1.67 2.67 2.67
12-15UT 1.67 2.33 2.00
15-18UT 1.67 2.00 1.67
18-21UT 2.00 2.33 2.67
21-00UT 2.00 2.67 1.67
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-19 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for May 26-May 28 2026
May 26 May 27 May 28
S1 or greater 50% 5% 5%
Rationale: There is a chance for S1 (Minor) or greater solar radiation
storms due to activity beyond the NW limb.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for May 26-May 28 2026
May 26 May 27 May 28
R1-R2 35% 35% 35%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
all three days.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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