Ticker for September 15, 1999

                
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September 15, 1999 September 15, 1999 September 15, 1999 September 15, 1999


(re-submitted to correct links)

Do-it-yourself Surface Frontogenesis

Today, with a little help from several things, a temperature gradient
was (re)born across Oklahoma.  How?

Start with a weak boundary, throw in some overnight rain:


Add a cloud shield:


And you get a large contrast in heating, as seen in the 24-hour
temperature change map:


The end result is something that resembles a front!