774
FXXX10 KWNP 300031
DAYTDF

:Product: 3-Day Forecast
:Issued: 2026 Oct 30 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 Oct 30-Nov 01 2026 is 5.00 (NOAA Scale
G1).

NOAA Kp index breakdown Oct 30-Nov 01 2026

             Oct 30       Oct 31       Nov 01
00-03UT       0.67         5.00 (G1)    3.67
03-06UT       0.67         4.67 (G1)    4.67 (G1)
06-09UT       0.67         4.33         3.33
09-12UT       0.33         4.00         2.67
12-15UT       0.33         3.00         2.33
15-18UT       0.67         3.00         3.33
18-21UT       1.67         3.67         3.67
21-00UT       1.67         4.00         3.33

Rationale: G1 (Minor) geomagnetic storms are likely on 31 Oct and 01 Nov
due to CH HSS influences.

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 Oct 30-Nov 01 2026

              Oct 30  Oct 31  Nov 01
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 Oct 30-Nov 01 2026

              Oct 30        Oct 31        Nov 01
R1-R2            1%            1%            1%
R3 or greater    1%            1%            1%

Rationale: No R1 (Minor) or greater radio blackouts are expected. No
significant active region flare activity is forecast.