569
FXXX10 KWNP 280031
DAYTDF

:Product: 3-Day Forecast
:Issued: 2026 Mar 28 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 Mar 28-Mar 30 2026 is 4.00 (below NOAA
Scale levels).

NOAA Kp index breakdown Mar 28-Mar 30 2026

             Mar 28       Mar 29       Mar 30
00-03UT       1.67         2.33         3.67
03-06UT       2.00         1.67         4.00
06-09UT       1.33         1.00         3.00
09-12UT       0.67         0.67         2.33
12-15UT       1.33         1.67         2.00
15-18UT       1.33         2.33         2.33
18-21UT       1.67         2.67         3.00
21-00UT       1.67         3.00         3.00

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 Mar 28-Mar 30 2026

              Mar 28  Mar 29  Mar 30
S1 or greater    5%      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.

C. NOAA Radio Blackout Activity and Forecast

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for Mar 28-Mar 30 2026

              Mar 28        Mar 29        Mar 30
R1-R2           45%           45%           40%
R3 or greater    5%            5%            5%

Rationale: There is a chance for R1-R2 (Minor-Moderate) radio blackouts
over 28-30 Mar.