Snow cover in Colorado, Kansas, and Nebraska

October 23rd, 2009 |
MODIS visible and 2.1 µm near-IR snow/ice channel images

MODIS visible and 2.1 µm near-IR snow/ice channel images

AWIPS images of the MODIS visible and 2.1 µm near-IR “snow/ice” channels (above) showed areas of snow cover across parts of eastern Colorado, far northwestern Kansas, and Nebraska on 23 October 2009. Snow is a strong absorber at the 2.1 µm wavelength, so it appears very dark on the snow/ice channel image.

The corresponding MODIS Land Surface Temperature product (below) revealed significantly colder LST values in the middle to upper 30s F (darker green colors) where the snow cover was deeper. There was a lack of surface reports in the exact areas of deeper snow cover, except for Limon in eastern Colorado (station identifier KLIC), which was reporting a surface air temperature of 39º F at the time.

MODIS Land Surface Temperature product + surface METAR data

MODIS Land Surface Temperature product + surface METAR data

Snowfall amounts from this particular storm (which moved through the region on 22 October) included 15 inches at Elizabeth, Colorado, 12 inches at Brady, Nebraska, and 4 inches at Saint Francis, Kansas. These locations are marked on a MODIS Red/Green/Blue (RGB) true color image from the SSEC MODIS Today site (below, displayed using Google Earth).

MODIS true color image (displayed using Google Earth)

MODIS true color image (displayed using Google Earth)

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