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Archive: Aug 2013

Bore Feature over Wisconsin

Satellite and especially radar revealed the tell-tale signs of an undular bore over southern Wisconsin on the morning of 26 August. The parallel lines of enhanced radar return, above, suggest that the outflow from the convective complex over northern Wisconsin organized into a bore, in part because the atmosphere over... Read More

River valley fog in southwestern Wisconsin

A comparison of AWIPS images of Suomi NPP VIIRS IR brightness temperature difference (BTD) “Fog/stratus product” and 0.7 um Day/Night Band images (above) revealed the formation of nocturnal river valley fog across parts of southwestern Wisconsin and the adjacent Upper Mississippi River Valley region at 08:00 UTC or 3:00 AM... Read More