Space Weather

Space Weather Observations, Alerts, and Forecast

Product: 3-Day Forecast - Issued: 2025 Jul 01 0030 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 01-Jul 03 2025 is 5.33 (NOAA Scale G1).

NOAA Kp index breakdown Jul 01-Jul 03 2025
Jul 01Jul 02Jul 03
00-03UT2.675.00 (G1)4.67 (G1)
03-06UT3.005.33 (G1)4.33
06-09UT2.334.67 (G1)3.33
09-12UT2.004.002.67
12-15UT1.673.002.33
15-18UT2.002.672.67
18-21UT3.333.673.00
21-00UT3.674.67 (G1)3.67

Rationale: G1 (Minor) geomagnetic storming is likely on 02-03 Jul due to the arrival of the 28 Jun CME.

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 01-Jul 03 2025
Jul 01Jul 02Jul 03
S1 or greater5%5%5%

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 01-Jul 03 2025
Jul 01Jul 02Jul 03
R1-R225%25%25%
R3 or greater5%5%5%

Rationale: A chance for R1-R2 (Minor-Moderate) radio blackouts due to isolated M-class flare activity will persist through 03 July.

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.