Message:20844 In: SPACWX.USA
From: N4SDDate: Wed, 15 Apr 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <11176_N4SD>
Path: N2MH4|N2MH|K5DAT|K5DAT|WW6Q|W9GM|KA3BVJ|N3IP|KA3VSP|N4SD
R:260415/0812Z 30245@N2MH4.#SENC.NC.USA.NOAM LinBPQ6.0.24
R:260415/0811z @:N2MH.#NNJ.NJ.USA.NOAM [via Mesh] jnos 2.0p $:11176_N4SD
R:260415/0809Z @:K5DAT.NEWI.WI.USA.NA [ELK Grove Village, IL USA] #:4445 XrLin505c
R:260415/0809Z 32984@K5DAT.#NEWI.WI.USA.NOAM LinBPQ6.0.25
R:260415/0809Z 51090@WW6Q.#NEIN.IN.USA.NOAM LinBPQ6.0.25
R:260415/0808Z 57328@W9GM.#SWWI.WI.USA.NOAM BPQ6.0.25
R:260415/0808Z 80085@KA3BVJ.#EPA.PA.USA.NOAM BPQ1.4.65
R:260415/0808Z 65637@N3IP.#SEPA.PA.USA.NOAM BPQK6.0.24
R:260415/0756Z 775@KA3VSP.DE.USA.NOAM BPQ6.0.25
R:260415/0032Z 11176@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 150031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Apr 15 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 2 (below NOAA
Scale levels).
The greatest expected 3 hr Kp for Apr 15-Apr 17 2026 is 3.33 (below NOAA
Scale levels).
NOAA Kp index breakdown Apr 15-Apr 17 2026
Apr 15 Apr 16 Apr 17
00-03UT 2.33 1.67 1.67
03-06UT 3.00 2.67 1.67
06-09UT 3.33 2.67 1.67
09-12UT 3.33 2.33 1.33
12-15UT 2.67 1.67 1.33
15-18UT 2.33 1.67 1.33
18-21UT 2.33 1.67 1.33
21-00UT 1.67 2.33 1.33
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 Apr 15-Apr 17 2026
Apr 15 Apr 16 Apr 17
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 Apr 15-Apr 17 2026
Apr 15 Apr 16 Apr 17
R1-R2 10% 15% 15%
R3 or greater 1% 1% 1%
Rationale: There is a slight chance for R1-R2 (Minor-Moderate) radio
blackouts on 15-17 Apr, primarily due to the development of Region 4419.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
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