Message:24127 In: SPACWX.USA
From: N4SDDate: Sat, 13 Jun 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <15827_N4SD>
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FXXX10 KWNP 130031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Jun 13 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 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 3.33 4.67 (G1) 3.00
03-06UT 4.67 (G1) 4.00 2.33
06-09UT 5.67 (G2) 3.33 3.67
09-12UT 3.00 3.33 2.67
12-15UT 4.67 (G1) 2.67 2.67
15-18UT 5.00 (G1) 2.67 2.00
18-21UT 4.33 3.67 2.33
21-00UT 4.33 4.00 2.33
Rationale: Geomagnetic field conditions are likely to reach G2
(Moderate) geomagnetic storm levels on 13 Jun due to the persistence of
the high-speed stream combined with the anticipated arrival of CMEs that
left the Sun over 09 Jun and 11 Jun. Conditions are expected to decrease
on 14 Jun, with isolated G1 (Minor) storming periods still likely, as
CME influences wane.
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 35% 35% 35%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
on 13-15 Jun, primarily due to the potential of Regions 4464 and 4465.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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