A toggle between NOAA-20 VIIRS Day/Night Band and Infrared Window images valid at 0827 UTC (2:27 AM local time) on 22 January 2024 (above) showed an opening of the Kivalliq Polynya along the northwest coast of Hudson Bay — which was the result of a period of strong offshore winds (Arviat Airport CYEK observations),... Read More
Morning radar on the morning of 19 January 2024 (shown below from this source) showed a single band of snow squalls moving southward over central Lake Michigan. Then band moved inland over northwestern Indiana, resulting in a winter storm warning over northwestern Indiana (More information from NWS IWX) and hazardous travel conditions through that heavily-traveled corridor between Chicago and Detroit. GOES-16 Clean... Read More
GOES-18 (GOES-West) and GOES-16 (GOES-East) True Color RGB images from the CSPP GeoSphere site (above) showed hazy arcs of blowing dust lofted by Tehuano gap winds that emerged from the south coast of Mexico — which spread out across the Gulf of Tehuantepec and the adjacent waters of the Pacific Ocean... Read More
In regions without radar, satellite estimates of rainfall intensity are vital in understanding precipitation. Microwave estimates have an advantage in that microwave energy is not strongly affected by clouds, so the internal structure of the cloud that can affect rainfall distribution can be detected. (However, microwave data has poorer spatial... Read More
