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From: Jesse Ferrell (WeatherMatrix) (jesse{at}weathermatrix.net)
Date: Sat Aug 17 2002 - 07:18:13 EDT

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PUBLIC INFORMATION STATEMENT...CORRECTED
NATIONAL WEATHER SERVICE SAN ANGELO TX
640 AM CDT WED AUG 14 2002

...A RARE HEATBURST EVENT OCCURRED IN THE SAN ANGELO AREA AFTER
MIDNIGHT...

THIS HEATBURST DEVELOPED FROM A DECAYING THUNDERSTORM COMPLEX SOUTH OF SAN
ANGELO. AS THESE THUNDERSTORMS GRADUALLY DISSIPATED...THEY CREATED
DOWNDRAFTS OF DRY AIR WHICH WARMED BY COMPRESSION AS THE AIR DESCENDED.
THE RESULTING HEATBURST...WHICH WAS FELT IN THE SAN ANGELO AREA...WAS
ACCOMPANIED BY A RAPID TEMPERATURE RISE...A SUDDEN DROP IN RELATIVE
HUMIDITY...STRONG GUSTY WINDS AND A FALL IN PRESSURE.

THE EFFECTS OF THIS HEATBURST AT THE SAN ANGELO REGIONAL AIRPORT ARE SHOWN
BELOW...

TIME WIND TEMPERATURE DEWPOINT RELATIVE HUMIDITY
           (MPH) (DEGREES F) (DEGREES F) (PERCENT)

MIDNIGHT SOUTH 13 70 63 79

1235 AM SOUTH 31, 75 61 62
           GUSTS TO 40

105 AM NORTHWEST 15, 94 45 19
           GUSTS TO 40

120 AM SOUTH 31, 73 61 66
           GUSTS TO 41

THE STRONG SOUTH WINDS CONTINUED DURING THE POST-MIDNIGHT HOURS BEFORE
SUBSIDING. THE PEAK WIND GUST AT THE SAN ANGELO REGIONAL AIRPORT WAS 53
MPH FROM THE SOUTH AT 207 AM TODAY.

A HEATBURST IS A RARE METEOROLOGICAL EVENT...BUT ONE WHICH CAN OCCUR
ACROSS THE GREAT PLAINS OF THE UNITED STATES.

-- 
====================================================
Jesse Ferrell - Meteorologist & Internet Developer - WeatherMatrix
4000 Weather Enthusiasts Can't Be Wrong! www.weathermatrix.net
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