Message:20685 In: SPACWX.USA
From: N4SDDate: Sun, 12 Apr 26 00:39:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <10985_N4SD>
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FXXX10 KWNP 120031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 12 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 Apr 12-Apr 14 2026 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Apr 12-Apr 14 2026
Apr 12 Apr 13 Apr 14
00-03UT 2.67 2.67 2.00
03-06UT 3.67 3.00 2.00
06-09UT 3.67 2.67 1.00
09-12UT 2.67 1.67 2.00
12-15UT 2.00 1.67 1.67
15-18UT 1.67 1.00 3.00
18-21UT 1.67 1.00 3.67
21-00UT 2.67 2.00 4.00
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-18 over the past 24 hours, was
below S-scale storm level thresholds.
Solar Radiation Storm Forecast for Apr 12-Apr 14 2026
Apr 12 Apr 13 Apr 14
S1 or greater 1% 1% 1%
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 Apr 12-Apr 14 2026
Apr 12 Apr 13 Apr 14
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%
Rationale: A slight chance for R1 (Minor) or greater radio blackouts are
expected on 12-14 Apr,
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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