:Product: Geomagnetic Forecast :Issued: 2024 Apr 18 2205 UTC # Prepared by the U.S. Dept. of Commerce, NOAA, Space Weather Prediction Center # NOAA Ap Index Forecast Observed Ap 17 Apr 007 Estimated Ap 18 Apr 006 Predicted Ap 19 Apr-21 Apr 006-010-012 NOAA Geomagnetic Activity Probabilities 19 Apr-21 Apr Active 25/30/35 Minor storm 05/20/25 Moderate storm 01/05/05 Strong-Extreme storm 01/01/01 NOAA Kp index forecast 19 Apr - 21 Apr Apr 19 Apr 20 Apr 21 00-03UT 1.67 2.00 3.00 03-06UT 2.00 1.00 3.67 06-09UT 1.67 2.00 2.67 09-12UT 1.67 1.00 2.67 12-15UT 1.67 2.67 2.00 15-18UT 1.67 2.67 2.00 18-21UT 2.00 3.00 3.00 21-00UT 2.00 3.00 2.00