Message:18671 In: SPACWX.USA
From: N4SDDate: Thu, 12 Mar 26 00:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <8884_N4SD>
Path: N2MH4|N3MEL|KA3VSP|N4SD
R:260312/0207Z 28902@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260312/0207Z 13216@N3MEL.#EPA.PA.USA.NOAM LinBPQ6.0.25
R:260312/0202Z 55427@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260312/0031Z 8884@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 120031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Mar 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 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 3.00 1.67 4.67 (G1)
03-06UT 2.67 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: Isolated periods of G1 (Minor) storming are possible on 13
and 14 Mar due to onset of positive polarity coronal hole high speed
stream (+CH HSS).
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.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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