Message:23129 In: SPACWX.USA
From: N4SDDate: Wed, 27 May 26 00:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <14340_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260527/0346Z 31694@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260527/0312Z 17878@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260527/0218Z 2571@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260527/0031Z 14340@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 270031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 May 27 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 4 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for May 27-May 29 2026 is 3.67 (below NOAA
Scale levels).
NOAA Kp index breakdown May 27-May 29 2026
May 27 May 28 May 29
00-03UT 3.33 3.00 1.67
03-06UT 3.67 3.67 2.00
06-09UT 3.00 3.00 1.67
09-12UT 2.33 2.33 1.33
12-15UT 2.33 2.00 1.33
15-18UT 2.33 1.67 1.67
18-21UT 2.67 2.67 2.00
21-00UT 3.00 1.67 2.33
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
above S-scale storm level thresholds.
Solar Radiation Storm Forecast for May 27-May 29 2026
May 27 May 28 May 29
S1 or greater 10% 1% 1%
Rationale: There is a slight chance for S1 (Minor) or greater solar
radiation storms on 27 May as flux levels are still slightly elevated.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for May 27-May 29 2026
May 27 May 28 May 29
R1-R2 40% 40% 40%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
through 29 May due to the flaring potential on the visible disk.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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