Great Lakes water temperatures in early September

September 10th, 2021 |
NOAA-20 True-Color imagery over the Great Lakes, along with ACSPO SST values derived from VIIRS data, 1806 UTC on 10 September 2021 (Click to enlarge)

The early afternoon NOAA-20 overpass over the Great Lakes saw mostly clear skies, allowing for an accurate measurement — from satellite — of the lake surface temperatures, scaled in the image above to be between 55º and 75º F. Western Lake Erie has the warmest temperatures (peaking just below 75º, but a warm plume also exists in southern Lake Michigan. The zoomed-in image below shows Buoy observations in/around the lakes; buoy observations were very close to satellite measurements.

NOAA-20 SSTs along with Buoy observations, 1800 UTC on 10 September 2021 (Click to enlarge)

True Color and ACSPO SST imagery are available for AWIPS via an LDM feed from CIMSS. True-Color imagery is also available at the VIIRS Today website.

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