Message:19637 In: SPACWX.USA
From: N4SDDate: Thu, 26 Mar 26 00:31:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <9813_N4SD>
Path: GB7RJJ|PU2XTC|KF5JRV|K0WAV|N9SEO|WW6Q|WG3K|NS2B|N3IP|KA3VSP|N4SD
R:260326/1001Z 10561@GB7RJJ.#79.GBR.EURO LinBPQ6.0.25
R:260326/0958Z 7420@PU2XTC.SP.BRA.SOAM LinBPQ6.0.25
R:260326/0953Z 22175@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.24
R:260326/0952Z 45622@K0WAV.#NWAR.AR.USA.NOAM BPQ6.0.25
R:260326/0947Z 51029@N9SEO.#NAR.AR.USA.NOAM LinBPQ6.0.25
R:260326/0947Z 49850@WW6Q.#NEIN.IN.USA.NOAM LinBPQ6.0.25
R:260326/0946Z 31326@WG3K.#SMD.MD.USA.NOAM LinBPQ6.0.25
R:260326/0939Z 47694@NS2B.#WNY.NY.USA.NOAM BPQ6.0.25
R:260326/0939Z 64478@N3IP.#SEPA.PA.USA.NOAM BPQK6.0.24
R:260326/0933Z 56064@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260326/0031Z 9813@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 260031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Mar 26 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 5 (NOAA Scale
G1). The greatest expected 3 hr Kp for Mar 26-Mar 28 2026 is 4.67 (NOAA
Scale G1).
NOAA Kp index breakdown Mar 26-Mar 28 2026
Mar 26 Mar 27 Mar 28
00-03UT 4.67 (G1) 2.33 1.67
03-06UT 4.67 (G1) 2.67 2.00
06-09UT 4.00 2.00 1.33
09-12UT 2.67 2.00 0.67
12-15UT 2.67 1.67 1.33
15-18UT 3.00 2.00 1.33
18-21UT 2.33 2.00 1.67
21-00UT 2.00 2.33 1.67
Rationale: G1 (Minor) geomagnetic storms are expected on 26 Mar due to a
possible glancing blow from a CME that left the Sun on 22 Mar. No
further G1 (Minor) or greater geomagnetic storms are expected on 27-28
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 26-Mar 28 2026
Mar 26 Mar 27 Mar 28
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 26-Mar 28 2026
Mar 26 Mar 27 Mar 28
R1-R2 30% 30% 30%
R3 or greater 5% 5% 5%
Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts,
with a slight chance for R3 (Strong) events through 28 Mar.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
Return To Bulletin List