Message:24672 In: SPACWX.USA
From: N4SDDate: Thu, 25 Jun 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <16999_N4SD>
Path: K7EK|N3MEL|KA3VSP|N4SD
R:260625/0337z @:K7EK.#NOKY.KY.USA.NOAM $:16999_N4SD
R:260625/0336Z 19772@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260625/0331Z 3897@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260625/0032Z 16999@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 250031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Jun 25 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 Jun 25-Jun 27 2026 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Jun 25-Jun 27 2026
Jun 25 Jun 26 Jun 27
00-03UT 3.67 3.33 3.00
03-06UT 4.00 3.67 3.67
06-09UT 2.67 2.00 2.00
09-12UT 2.67 1.67 2.67
12-15UT 1.67 3.00 2.00
15-18UT 1.67 3.67 2.00
18-21UT 2.67 3.33 2.67
21-00UT 3.67 3.00 3.00
Rationale: No G1 (Minor) or greater geomagnetic storms are expected.
Periods of active conditions are likely 25-27 Jun in response to -CH HSS
influences.
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 Jun 25-Jun 27 2026
Jun 25 Jun 26 Jun 27
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 Jun 25-Jun 27 2026
Jun 25 Jun 26 Jun 27
R1-R2 50% 50% 50%
R3 or greater 10% 10% 10%
Rationale: There is a high chance for R1-R2 (Minor-Moderate) radio
blackouts 54-27 Jun due primarily to the flare potential of Region 4478.
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73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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