Message:20117 In: SPACWX.USA
From: N4SDDate: Thu, 02 Apr 26 12:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <10314_N4SD>
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FXXX10 KWNP 021231
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 02 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 5 (NOAA Scale
G1).
The greatest expected 3 hr Kp for Apr 02-Apr 04 2026 is 5.67 (NOAA Scale
G2).
NOAA Kp index breakdown Apr 02-Apr 04 2026
Apr 02 Apr 03 Apr 04
00-03UT 4.67 (G1) 4.33 5.33 (G1)
03-06UT 4.00 4.00 4.67 (G1)
06-09UT 5.33 (G1) 3.33 4.00
09-12UT 5.00 (G1) 3.33 3.67
12-15UT 5.67 (G2) 2.67 3.33
15-18UT 3.33 2.33 3.00
18-21UT 3.33 2.33 3.67
21-00UT 4.33 3.67 4.00
Rationale: The geomagnetic field is expected to be at unsettled to G1-G2
(Minor-Moderate) levels through the rest of the UTC day on 02 Apr due to
combined CME/CH HSS activity. Glancing CME activity is expected early
on 04 Apr causing unsettled to G1 (Minor) storming with a chance for G2
(Moderate) levels.
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 02-Apr 04 2026
Apr 02 Apr 03 Apr 04
S1 or greater 10% 10% 25%
Rationale: There is a slight chance for the greater than 10 MeV proton
flux to exceed S1 (Minor) solar radiation storm levels through 03 Apr
increasing to a chance on 04 Apr due to possible CME enhancement.
C. NOAA Radio Blackout Activity and Forecast
No radio blackouts were observed over the past 24 hours.
Radio Blackout Forecast for Apr 02-Apr 04 2026
Apr 02 Apr 03 Apr 04
R1-R2 55% 55% 55%
R3 or greater 15% 15% 15%
Rationale: Solar activity is likely to reach moderate
(R1/R2-Minor/Moderate) levels, with slight chance for X-class
(R3-Strong) flares through 04 Apr, due primarily to the flare potential
of Regions 4404, 4405 and 4409.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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