Fires in the Upper Midwest

May 1st, 2020 |

GOES-16 CIMSS Natural Color RGB, Fire Temperature RGB and Shortwave Infrared (3.9 µm) images [click to play animation | MP4]

GOES-16 CIMSS Natural Color RGB, Fire Temperature RGB and Shortwave Infrared (3.9 µm) images [click to play animation | MP4]

GOES-16 (GOES-East) CIMSS Natural Color Red-Green-Blue (RGB), Fire Temperature RGB and Shortwave Infrared (3.9 µm) images (above) revealed a small cluster of fires in southeastern North Dakota, as well as isolated fires in far western Minnesota and far northeastern South Dakota on 01 May 2020. Strong winds — gusting over 30 mph at some locations — in the wake of a frontal passage helped some of these agricultural fires to intensify for a few hours, with pyrocumulus clouds and a smoke plume being produced by the cluster of fires in southeastern North Dakota.

GOES-16 derived products such as Fire Power, Fire Temperature and Fire Area (below) allow individual fire pixels to be sampled and characterized — for example, at 2136 UTC.

GOES-16 Shortwave Infrared (3.9 µm, top left), Fire Power (top right), Fire Temperature (bottom left) and Fire Area (bottom right) images [click to play animation | MP4]

GOES-16 Shortwave Infrared (3.9 µm, top left), Fire Power (top right), Fire Temperature (bottom left) and Fire Area (bottom right) images [click to play animation | MP4]

NUCAPS and dry air in the Upper Midwest

May 1st, 2020 |

GOES-16 ABI Band 2 (0.64 µm, visible) and Band 13 (10.3 µm, infrared) along with gridded NUCAPS fields of 925-700mb Relative Humidity, Midwest Base Reflectivity and NUCAPS Sounding availability points (Click to enlarge)

A cloud band passing through the upper midwest on 1 May 2020, shown above in the GOES-16 ABI Visible and Infrared imagery (toggled with NUCAPS products and radar), was accompanied by radar echoes. Would you expect that radar-indicated precipitation to reach the ground?  Gridded NUCAPS fields (shown here with NUCAPS Sounding availability points) show very dry air in the lower troposphere over eastern Wisconsin.  Individual NUCAPS soundings, one over Lake Michigan just east of Racine, and one over Green Bay, toggled below, similarly show very dry air.

NUCAPS Profiles over Lake Michigan and Green Bay (Click to enlarge)