The 3-panel animation above shows the 3 “Water Vapor” channels on GOES-R Satellites — Bands 8, 9 and 10 that sense emitted radiation centered at 6.19 µm, 6.95 µm and 7.34 µm, respectively. The date of these images is 24 May 2022, when SPC suggested a modest risk of severe... Read More

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) Visible/Infrared Sandwich RGB images from 1257-1950 UTC on 04 April 2023  (above) showed thunderstorms that produced hail up to 4.0 inches in diameter in Iowa and a wind gust to 90 mph in Illinois (along with a brief tornado) (SPC Storm Reports).1-minute GOES-16 Visible/Infrared Sandwich RGB images with an overlay of GLM Flash Extent Density... Read More

With a strong midlatitude cyclone centered over Iowa on 31 March 2023, the Storm Prediction Center (SPC) outlined 2 areas of relatively rare High Risk for severe weather — and GOES-16 (GOES-East) Total Precipitable Water along with the Lifted Index (LI) and Convective Available Potential Energy (CAPE) Derived Stability Indices (above) showed that a corridor of moisture and instability... Read More

Much of the mid-Mississippi River valley was placed under a Moderate Risk of severe weather by the Storm Prediction Center on 31 March 2023. Day Night Band imagery from NOAA-20 (mislabeled as Suomi NPP), above, shows two bore-like features with very different orientations (there is also a notable lightning feature over eastern South Dakota!). The feature over Iowa is... Read More