Message:24160 In: SPACWX.USA
From: N4SDDate: Sat, 13 Jun 26 12:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <15898_N4SD>
Path: K7EK|N3MEL|KA3VSP|N4SD
R:260613/1632z @:K7EK.#NOKY.KY.USA.NOAM $:15898_N4SD
R:260613/1625Z 18817@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260613/1618Z 3350@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260613/1231Z 15898@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 131231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Jun 13 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 Jun 13-Jun 15 2026 is 5.67 (NOAA Scale
G2).
NOAA Kp index breakdown Jun 13-Jun 15 2026
Jun 13 Jun 14 Jun 15
00-03UT 3.00 4.67 (G1) 2.67
03-06UT 3.00 3.67 3.00
06-09UT 2.67 2.67 3.67
09-12UT 2.67 2.67 3.00
12-15UT 2.67 1.67 2.67
15-18UT 3.67 1.67 1.67
18-21UT 4.67 (G1) 2.67 1.67
21-00UT 5.67 (G2) 2.67 2.00
Rationale: Periods of G1-G2 (Minor-Moderate) geomagnetic storms are
likely on 13 Jun, with periods of G1 storming likely on 14 Jun, due to
negative polarity CH HSS and CME 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 13-Jun 15 2026
Jun 13 Jun 14 Jun 15
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 13-Jun 15 2026
Jun 13 Jun 14 Jun 15
R1-R2 20% 20% 20%
R3 or greater 5% 5% 5%
Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts over 13-15 Jun.
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73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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