Message:19364 In: SPACWX.USA
From: N4SDDate: Sun, 22 Mar 26 12:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <9576_N4SD>
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R:260322/1613Z 44381@K7EK.#NOKY.KY.USA.NOAM BPQ6.0.25
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FXXX10 KWNP 221231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Mar 22 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 7 (NOAA Scale
G3).
The greatest expected 3 hr Kp for Mar 22-Mar 24 2026 is 6.67 (NOAA Scale
G3).
NOAA Kp index breakdown Mar 22-Mar 24 2026
Mar 22 Mar 23 Mar 24
00-03UT 3.67 5.00 (G1) 4.00
03-06UT 4.67 (G1) 5.00 (G1) 3.33
06-09UT 5.00 (G1) 3.67 3.00
09-12UT 6.67 (G3) 2.67 2.33
12-15UT 5.33 (G1) 3.00 2.33
15-18UT 3.67 3.00 2.33
18-21UT 3.67 3.33 2.67
21-00UT 5.00 (G1) 3.67 3.00
Rationale: G2 (Moderate) geomagnetic storming is likely on 22 Mar due to
waning CME influences and the anticipated onset of CH HSS effects.
Isolated periods of G1 (Minor) geomagnetic storming are likely on 23 Mar
as CH HSS effects continue. Unsettled to active levels are expected to
prevail on 24 Mar.
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 22-Mar 24 2026
Mar 22 Mar 23 Mar 24
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 22-Mar 24 2026
Mar 22 Mar 23 Mar 24
R1-R2 10% 10% 10%
R3 or greater 1% 1% 1%
Rationale: Solar activity is expected to be very low with a chance for a
C-class flares and a slight chance for an M-class flare on days one,
two, and three (22 Mar, 23 Mar, 24 Mar).
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
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