[STORMREPORTS] Heat Burst Strikes San Angelo
A RELATIVELY RARE WEATHER PHENOMENON KNOWN AS A HEAT
AT 820 PM...THE TEMPERATURE HAD COOLED TO 83 DEGREES
JUST 17 MINUTES LATER...AT 837 PM...THE TEMPERATURE
TEMPERATURE AND RELATIVE HUMIDITY READINGS RETURNED TO
HEAT BURSTS ARE CAUSED BY DISSIPATING THUNDERSTORMS
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From: Steve Nelson (steve0707{at}yahoo.com)
Date: Sun Jun 13 2004 - 21:06:46 EDT
BURST STRUCK
SAN ANGELO BETWEEN 8 PM AND 9 PM ON SATURDAY
EVENING...JUNE 12TH.
TEMPERATURES CLIMBED...RELATIVE HUMIDITY VALUES
DROPPED...AND WINDS
GUSTED TO NEARLY 60 MPH AS THE HEAT BURST MOVED ACROSS
THE AREA.
AFFECTING MAINLY THE SOUTH SIDE OF THE CITY...DATA
FROM NATIONAL
WEATHER SERVICE EQUIPMENT AT MATHIS REGIONAL AIRPORT
SHOWED THE
EFFECTS FROM THE HEAT BURST:
AND THE
RELATIVE HUMIDITY STOOD AT 53 PERCENT.
HAD CLIMBED BACK
TO 90 DEGREES...AND WHEN COMBINED WITH A DEWPOINT THAT
HAD DROPPED
TO 44...THE RELATIVE HUMIDITY PLUMMETED TO A BONE DRY
20 PERCENT.
THEIR PRE
HEAT BURST READINGS BY 854 PM ...ANOTHER 17 MINUTES
SINCE THE HEART
OF THE HEATBURST.
AND MOST OFTEN
FORM IN THE PLAINS STATES DURING THE LATE SPRING AND
EARLY SUMMER.
IF ATMOSPHERIC CONDITIONS ARE JUST RIGHT...THE
DECAYING THUNDERSTORM
WILL PRODUCE A WEAK DOWNBURST FROM THE MID LEVELS OF
THE STORM. AS
THIS AIR SINKS...IT PICKS UP SPEED AND RAPIDLY
HEATS...AND A HEAT
BURST IS BORN. THE HEAT BURST THAT STRUCK SAN ANGELO
WAS A MILD ONE.
A HEATBURST THAT STRUCK PARTS OF CENTRAL AND SOUTHWEST
OKLAHOMA IN
1999 DROVE TEMPERATURES OVER THE 100 DEGREE MARK AS
WINDS IN EXCESS
OF 100 MPH BLASTED THROUGH THE AREA.
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