Severe thunderstorms across Iowa, Wisconsin and Michigan

June 15th, 2022 |

GOES-16 “Red” Visible (0.64 µm) images, with time-matched SPC Storm Reports plotted in red [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) images (above) include time-matched SPC Storm Reports — and showed the development severe thunderstorms across parts of Iowa, Wisconsin and Upper Michigan during the afternoon and early evening hours on 15 June 2022. Boundary layer feeder band clouds could be seen flowing north-northeastward into some of the growing thunderstorms — which produced a few tornadoes and damaging straight-line winds as strong as 80 mph in Wisconsin, and hail as large as 2.75 inches in diameter in Iowa. This convection developed along and ahead of an eastward-moving cold front (surface analyses).

In the corresponding 1-minute GOES-16 “Clean” Infrared Window (10.35 µm) images (below), pulsing overshooting tops exhibited cold infrared brightness temperatures in the -75 to -79ºC range (brighter white pixels embedded within areas of black).

GOES-16 “Clean” Infrared Window (10.35 µm) images, with time-matched SPC Storm Reports plotted in cyan [click to play animated GIF | MP4]

ProbSevere and LightningCast over La Crosse, Wisconsin

June 15th, 2022 |

ProbSevere is a weather product that uses GOES-16 data to help predict the probability of any severe weather (hail, wind, or tornados) happening in the next 60 minutes. ProbSevere LightningCast predicts the probability that a GLM Lightning observation will occur in the next 60 minutes. Below are examples of these products over the Western Wisconsin area as a convective system rolls through La Crosse, Wisconsin.

The ProbSevere probability product imaged as contours, overlayed with GOES-16 Day Cloud Convection RGB for 06-15-2022 from 20:00 to 20:22Z near La Crosse, Wisconsin [Click to enlarge].
The LightningCast probability product imaged as contours of 75, 50, 25, and 10 percent, overlayed with GOES-16 Day Cloud Convection RGB for 06-15-2022 from 20:00 to 20:22Z near La Crosse, Wisconsin [Click to enlarge].