Message:18710 In: SPACWX.USA
From: N4SDDate: Thu, 12 Mar 26 12:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <8921_N4SD>
Path: N2MH4|WB4WPF|KA3VSP|N4SD
R:260312/1316Z 28936@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260312/1314Z 8021@WB4WPF.#SFL.FL.USA.NOAM LinBPQ6.0.25
R:260312/1309Z 55442@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260312/1232Z 8921@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 121231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Mar 12 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 Mar 12-Mar 14 2026 is 5.00 (NOAA Scale
G1).
NOAA Kp index breakdown Mar 12-Mar 14 2026
Mar 12 Mar 13 Mar 14
00-03UT 2.67 1.67 4.67 (G1)
03-06UT 2.33 1.33 4.00
06-09UT 2.00 1.33 4.00
09-12UT 1.33 2.67 3.00
12-15UT 1.33 3.33 2.67
15-18UT 1.67 5.00 (G1) 2.33
18-21UT 1.33 4.33 2.33
21-00UT 1.67 4.33 3.67
Rationale: G1 (Minor) geomagnetic storms are likely over 13-14 Mar due
to influence from a positive polarity coronal hole.
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 Mar 12-Mar 14 2026
Mar 12 Mar 13 Mar 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 Mar 12-Mar 14 2026
Mar 12 Mar 13 Mar 14
R1-R2 20% 20% 20%
R3 or greater 1% 1% 1%
Rationale: There exists a slight chance for R1-R2 (Minor-Moderate) radio
blackouts over 12-14 Mar.
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73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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