Message:26377 In: SPACWX.USA
From: N4SDDate: Sun, 19 Jul 26 00:32:00 Z
Newsgroups: SPACWX.USA
Subject: Space Weather 3-Day Forecast
Message-ID: <19001_N4SD>
Path: GB7RJJ|PU2XTC|KF5JRV|K5DAT|K7EK|N3HYM|N4SD
R:260720/0437Z 16954@GB7RJJ.#79.GBR.EURO LinBPQ6.0.25
R:260720/0130Z 12990@PU2XTC.SP.BRA.SOAM LinBPQ6.0.25
R:260720/0103Z 28422@KF5JRV.#NWAR.AR.USA.NA BPQ6.0.24
R:260720/0058Z 46193@K5DAT.#NEWI.WI.USA.NOAM LinBPQ6.0.25
R:260720/0057z @:K7EK.#NOKY.KY.USA.NOAM $:19001_N4SD
R:260720/0033Z 10383@N3HYM.#FRDK.MD.USA.NOAM BPQ6.0.25
R:260719/0032Z 19001@N4SD.#TIDE.VA.USA.NOAM BPQ6.0.24
FXXX10 KWNP 190031
DAYTDF
:Product: 3-Day Forecast
:Issued: 2026 Jul 19 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 Jul 19-Jul 21 2026 is 2.00 (below NOAA
Scale levels).
NOAA Kp index breakdown Jul 19-Jul 21 2026
Jul 19 Jul 20 Jul 21
00-03UT 1.67 1.33 1.33
03-06UT 2.00 2.00 2.00
06-09UT 1.67 2.00 2.00
09-12UT 1.33 1.33 1.33
12-15UT 0.67 1.67 1.33
15-18UT 0.67 0.67 0.67
18-21UT 1.67 0.67 0.67
21-00UT 1.67 1.33 1.67
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 Jul 19-Jul 21 2026
Jul 19 Jul 20 Jul 21
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 Jul 19-Jul 21 2026
Jul 19 Jul 20 Jul 21
R1-R2 15% 15% 15%
R3 or greater 1% 1% 1%
Rationale: There remains a slight chance for R1-R2 (Minor-Moderate)
radio blackouts over 19-21 Jul.
------
73 de Sperry N4SD
N4SD@N4SD.#TIDE.VA.USA.NOAM
Received via NOAA GOES-East satellite downlink
Return To Bulletin List