WFO San Angelo Climatology

August 2009 Climate Summary

...TEMPERATURES AVERAGED ABOVE NORMAL IN AUGUST...

PRECIPITATION FOR THE MONTH WAS BELOW NORMAL ACROSS MOST OF
WEST CENTRAL TEXAS. THE MONTHLY RAINFALL AMOUNTS VARIED
CONSIDERABLY...AND THIS WAS DUE TO THE SCATTERED COVERAGE
OF SHOWERS AND THUNDERSTORMS...WHICH OCCURRED ON SEVERAL
DAYS DURING THE MONTH. THE HIGHER MONTHLY AMOUNTS...IN THE
RANGE OF 2 TO 3.5 INCHES...OCCURRED AT SCATTERED LOCATIONS
ACROSS THE AREA. AT OTHER SCATTERED LOCATIONS THE MONTHLY
AMOUNTS WERE LESS THAN ONE HALF INCH. THESE AMOUNTS WERE
LESS THAN 25 PERCENT OF NORMAL...AND FOR A FEW LOCATIONS
LESS THAN 10 PERCENT OF THE MONTHLY NORMAL RAINFALL.

AT ABILENE REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR
AUGUST WAS 84.2 DEGREES. THIS WAS 1.6 DEGREES ABOVE THE NORMAL
AVERAGE TEMPERATURE OF 82.6 DEGREES. TOTAL PRECIPITATION FOR
AUGUST WAS 1.25 INCHES. THIS WAS 1.38 INCHES BELOW THE NORMAL
OF 2.63 INCHES. THIS MARKS THE 10TH WETTEST AUGUST ON RECORD
FOR ABILENE.

AT SAN ANGELO REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR
AUGUST WAS 84.8 DEGREES. THIS WAS 3.5 DEGREES ABOVE THE NORMAL
AVERAGE TEMPERATURE OF 81.3 DEGREES. TOTAL PRECIPITATION FOR
AUGUST WAS 1.89 INCHES. THIS WAS 0.16 INCHES BELOW THE MONTHLY
NORMAL OF 2.05 INCHES.

AT THE JUNCTION AIRPORT...ONLY 0.04 INCHES OF RAINFALL WAS
RECEIVED IN AUGUST.

THE NUMBER OF DAYS IN AUGUST WHERE HIGH TEMPERATURES REACHED
100 DEGREES OR MORE INCLUDE 8 AT ABILENE...11 AT SAN ANGELO...
AND 9 AT JUNCTION.

AUGUST 2009 WEATHER HIGHLIGHTS...

A HIGH PRESSURE SYSTEM ALOFT WAS CLOSE ENOUGH IN PROXIMITY TO
THE REGION TO HAVE THE MAIN WEATHER INFLUENCE DURING MOST OF
AUGUST. SCATTERED SHOWERS AND THUNDERSTORMS OCCURRED ON SEVERAL
DAYS DURING THE MONTH.

FROM THE EVENING INTO THE NIGHTTIME HOURS OF THE 1ST...SHOWERS
AND THUNDERSTORMS OCCURRED ACROSS MUCH OF THE SOUTHERN HALF
OF WEST CENTRAL TEXAS. THESE WERE MOST NUMEROUS OVER THE
CENTRAL AND EASTERN CONCHO VALLEY AND HEARTLAND. SCATTERED
LOCATIONS RECEIVED RAINFALL AMOUNTS BETWEEN 1.5 AND 3 INCHES.

FROM THE 2ND TO THE 11TH...HIGH PRESSURE AT THE SURFACE AND
ALOFT DOMINATED THE WEATHER PATTERN AND BROUGHT ABOVE NORMAL
TEMPERATURES AND DRY CONDITIONS TO WEST CENTRAL TEXAS.

WITH AN UNSTABLE AIRMASS AND WEAK SURFACE BOUNDARIES...
SCATTERED SHOWERS AND THUNDERSTORMS OCCURRED ON THE 11TH
ACROSS ROUGHLY THE NORTHWESTERN HALF OF WEST CENTRAL TEXAS...
AND ON THE 12TH ACROSS MUCH OF THE AREA SOUTH OF INTERSTATE
20. A PEAK WIND GUST OF 43 MPH WAS RECORDED AT THE SAN ANGELO
AIRPORT ON THE 11TH. SOME THUNDERSTORM WIND DAMAGE WAS
REPORTED IN BALLINGER ON THE EVENING OF THE 12TH. A FEW
ADDITIONAL SHOWERS AND THUNDERSTORMS OCCURRED ON THE 13TH.

WIDELY SCATTERED SHOWERS AND THUNDERSTORMS AFFECTED THE
BIG COUNTRY AND NORTHERN CONCHO VALLEY ON THE 15TH.

SCATTERED SHOWERS AND THUNDERSTORMS OCCURRED ACROSS MAINLY
THE NORTHERN HALF OF WEST CENTRAL TEXAS ON THE 21ST...AND
THROUGOUT WEST CENTRAL TEXAS ON THE 22ND. WEAK SURFACE
BOUNDARIES WERE SITUATED ACROSS THESE AREAS.

A HIGH PRESSURE SYSTEM ALOFT BROUGHT HOT AND DRY CONDITIONS
TO THE REGION ON THE 23RD THROUGH THE 26TH.

THIS HIGH PRESSURE SYSTEM RETREATED INTO THE WESTERN AND
SOUTHWESTERN STATES...A COLD FRONT TO DROP SOUTH ACROSS
WEST CENTRAL TEXAS ON THE 27TH. SCATTERED SHOWERS AND
THUNDERSTORMS OCCURRED ACROSS MUCH OF WEST CENTRAL TEXAS
ON THE 27TH. STRONG TO SEVERE STORMS AFFECTED THE BIG
COUNTRY AND BROWN COUNTY ON THE EVENING OF THE 27TH. WIND
GUSTS TO 60 MPH AND PENNY SIZE HAIL WERE REPORTED IN THE
ABILENE AREA. AT THE ABILENE REGIONAL AIRPORT...A PEAK
WIND GUST OF 58 MPH WAS RECORDED. NICKEL SIZE HAIL WAS
REPORTED IN HODGES (JONES COUNTY). IN BROWN COUNTY...A
WIND GUST TO 60 MPH WAS REPORTED AT LAKE BROWNWOOD.

WITH A NORTHERLY FLOW ALOFT AND INFLUENCE FROM A WEAK
UPPER LEVEL DISTURBANCE...SCATTERED SHOWERS AND
THUNDERSTORMS OCCURRED ACROSS MAINLY THE WESTERN HALF OF
WEST CENTRAL TEXAS ON THE AFTERNOON AND EARLY EVENING OF
THE 28TH.

AFTER THE COLD FRONTAL PASSAGE LATE IN THE MONTH...COOLER
AND DRIER AIR SETTLED SOUTH INTO WEST CENTRAL TEXAS DURING
THE LAST FEW DAYS OF THE MONTH...AND THIS WAS AIDED BY A
HIGH PRESSURE SYSTEM WHICH DROPPED SOUTH OUT OF CANADA
AND INTO THE PLAINS AND MIDWEST. TEMPERATURES DIPPED INTO
THE 55 TO 60 DEGREE RANGE ACROSS MUCH OF THE AREA ON THE
29TH...AND LOWS WERE IN THE UPPER 50S TO LOWER 60S ON THE
30TH. ON THE 30TH AND 31ST...HIGHS WERE IN THE UPPER 80S
TO LOWER 90S ACROSS WEST CENTRAL TEXAS.

$$