Space Weather

Space Weather Observations, Alerts, and Forecast

Product: 3-Day Forecast - Issued: 2025 Jul 30 1230 UTC
Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center.

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 Jul 30-Aug 01 2025 is 4.00 (below NOAA Scale levels).

NOAA Kp index breakdown Jul 30-Aug 01 2025
Jul 30Jul 31Aug 01
00-03UT2.673.672.33
03-06UT1.673.002.67
06-09UT1.332.672.33
09-12UT2.002.002.00
12-15UT2.002.332.00
15-18UT2.672.331.67
18-21UT3.672.672.00
21-00UT4.002.672.33

Rationale: No G1 (Minor) or greater geomagnetic storms are expected. No significant transient or recurrent solar wind features are forecast.

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 30-Aug 01 2025
Jul 30Jul 31Aug 01
S1 or greater1%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.

Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Jul 30-Aug 01 2025
Jul 30Jul 31Aug 01
R1-R230%30%30%
R3 or greater5%5%5%

Rationale: Theres a chance for R1-R2 (Minor-Moderate) radio blackouts all three days.

Space Weather Overview

Credits

Space Weather Images and Information (excluded from copyright) courtesy of:
NOAA / NWS Space Weather Prediction Center   Mauna Loa Solar Observatory (HAO/NCAR)   SOHO (ESA & NASA)

Powered by Space Weather PHP script by Mike Challis of Long Beach Weather.
Additions by Ken True of Saratoga Weather and Jerry Wilkins of Southeast Lincoln Weather.