Message:19743 In: SPACWX.USA
From: N4SDDate: Sat, 28 Mar 26 12:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <9974_N4SD>
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FXXX10 KWNP 281231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Mar 28 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 28-Mar 30 2026 is 4.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Mar 28-Mar 30 2026
Mar 28 Mar 29 Mar 30
00-03UT 3.33 2.33 3.67
03-06UT 2.00 1.67 4.00
06-09UT 2.67 1.00 3.00
09-12UT 2.67 0.67 2.33
12-15UT 1.67 1.67 2.00
15-18UT 0.67 2.33 2.33
18-21UT 0.67 2.67 3.00
21-00UT 1.67 3.00 3.00
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 Mar 28-Mar 30 2026
Mar 28 Mar 29 Mar 30
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
Radio blackouts reaching the R1 levels were observed over the past 24
hours. The largest was at Mar 28 2026 0418 UTC.
Radio Blackout Forecast for Mar 28-Mar 30 2026
Mar 28 Mar 29 Mar 30
R1-R2 55% 55% 55%
R3 or greater 10% 10% 10%
Rationale: Solar activity is expected to be low with M-class
(R1-R2/Minor-Moderate) flares likely through 30 Mar. A slight chance for
X-class (R3/Strong) is possible through 30 Mar.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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