WFO San Angelo Climatology

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
510 AM CDT MON AUG 1 2005

...A MORE ACTIVE THAN TYPICAL WEATHER PATTERN OCCURRED IN WEST
CENTRAL TEXAS IN JULY...

ALTHOUGH RAINFALL FOR THE MONTH WAS ABOVE NORMAL ACROSS MUCH OF
WEST CENTRAL TEXAS...SCATTERED LOCATIONS SOUTH OF A CLYDE TO SAN
ANGELO TO MERTZON LINE RECEIVED LESS RAINFALL (UNDER ONE INCH).
TEMPERATURES AVERAGED NEAR NORMAL FOR JULY.

AT ABILENE REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR JULY
WAS 82.6 DEGREES. THIS WAS 0.9 DEGREES BELOW THE NORMAL AVERAGE
TEMPERATURE OF 83.5 DEGREES. TOTAL PRECIPITATION FOR JULY WAS
2.42 INCHES. THIS WAS 0.72 INCHES ABOVE THE NORMAL OF 1.70
INCHES. THE HIGH TEMPERATURE REACHED 100 DEGREES OR MORE ON
FOUR DAYS IN JULY.

AT SAN ANGELO REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR
JULY WAS 82.9 DEGREES. THIS WAS 0.5 DEGREES ABOVE THE NORMAL
AVERAGE TEMPERATURE OF 82.4 DEGREES. TOTAL PRECIPITATION FOR
JULY AT THE SAN ANGELO REGIONAL AIRPORT WAS 1.15 INCHES. THIS
WAS 0.05 INCHES ABOVE THE MONTHLY NORMAL OF 1.10 INCHES. THE
HIGH TEMPERATURE REACHED 100 DEGREES OR MORE ON SIX DAYS IN
JULY.

JUNCTION RECORDED 2.73 INCHES OF PRECIPITATION FOR THE MONTH.
IN JUNCTION THE HIGH TEMPERATURE REACHED 100 DEGREES OR MORE
ON EIGHT DAYS IN JULY.


JULY 2005 WEATHER HIGHLIGHTS...

JULY WEATHER IN WEST CENTRAL TEXAS IS NORMALLY DOMINATED BY A
RIDGE OF HIGH PRESSURE ALOFT...AND IS NORMALLY HOT AND DRY. THIS
JULY...THE UPPER LEVEL HIGH PRESSURE SYSTEM WAS POSITIONED FAR
ENOUGH AWAY FROM WEST CENTRAL TEXAS TO ALLOW SHOWERS AND
THUNDERSTORMS TO AFFECT THE REGION ON SEVERAL DAYS. AN UNUSUAL
COLD FRONT MOVED SOUTH INTO THE AREA LATE IN THE MONTH.

THE HOTTEST TEMPERATURES FOR JULY OCCURRED DURING THE FIRST
SEVERAL DAYS OF THE MONTH. HIGH TEMPERATURES REACHED OR
EXCEEDED 100 DEGREES ACROSS MUCH OF THE REGION DURING THAT
TIME. SAN ANGELO SET A NEW RECORD HIGH TEMPERATURE (106
DEGREES) JULY 3RD AND TIED A RECORD HIGH ON THE 4TH.

EARLY IN JULY...THE UPPER LEVEL HIGH PRESSURE SYSTEM WAS
SITUATED OVER WEST TEXAS AND AJCACENT PARTS OF MEXICO AND
NEW MEXICO. A COUPLE OF WEAK UPPER LEVEL DISTURBANCES MOVED
DOWN INTO TEXAS ON THE EAST SIDE OF THIS HIGH PRESSURE
SYSTEM...AND BROUGHT SCATTERED SHOWERS AND THUNDERSTORMS TO THE
REGION.

MOST OF THE SHOWERS AND STORMS ON THE 2ND OCCURRED OVER THE BIG
COUNTRY...NORTHERN CONCHO VALLEY AND NORTHERN HEARTLAND. A WIND
GUST OF 46 MPH OCCURRED AT THE ABILENE REGIONAL AIRPORT.
SCATTERED LOCATIONS RECEIVED RAINFALL AMOUNTS OF ONE HALF TO
ONE INCH.

A CLUSTER OF STORMS ON THE EVENING AND EARLY NIGHTTIME HOURS OF
INDEPENDENCE DAY AFFECTED THE CONCHO VALLEY...BIG COUNTRY...
NORTHERN EDWARDS PLATEAU AND WESTERN PARTS OF THE NORTHWEST HILL
COUNTRY. WITH A VERY UNSTABLE AIRMASS...SOME OF THE STORMS BECAME
SEVERE. HAIL TO GOLFBALL SIZE WAS REPORTED AROUND STERLING CITY.
MOST OF THE SEVERE STORMS PRODUCED WIND GUSTS OF 60 TO 70 MPH...
DOWNING SOME TREES AND POWER LINES. THE APPROACH OF THE STORMS
INTO SAN ANGELO ON THE EVENING OF THE 4TH NECESSITATED THE
POSTPONEMENT OF THE FIREWORKS SHOW UNTIL THE FOLLOWING DAY. A
WIND GUST OF 46 MPH WAS RECORDED AT THE SAN ANGELO REGIONAL
AIRPORT. SCATTERED LOCATIONS NORTHWEST OF A BALLINGER TO SAN
ANGELO TO MERTZON LINE RECEIVED RAINFALL AMOUNTS OF ONE TO TWO
INCHES. OTHERWISE THE AMOUNTS VARIED UNDER AN INCH.

WITH A NORTHWEST FLOW ALOFT...THUNDERSTORM COMPLEXES MOVED
SOUTHEAST INTO THE BIG COUNTRY DURING THE EARLY MORNING HOURS
OF THE 6TH AND 7TH. GUSTY WINDS AND LOCALLY HEAVY RAINFALL
ACCOMPANIED THE STORMS. PEAK WIND GUSTS AT THE ABILENE REGIONAL
AIRPORT REACHED 43 MPH ON THE 6TH AND 51 MPH ON THE 7TH.

SCATTERED SHOWERS AND THUNDERSTORMS AFFECTED THE REGION WEST
OF A LINE FROM HAMLIN TO VANCOURT TO JUNCTION ON THE EVENING
OF THE 9TH. SEVERE STORMS PRODUCED NICKEL SIZE HAIL AT ROBERT
LEE...AND 4 MILES EAST OF HOBBS (FISHER COUNTY). OTHER SEVERE
STORMS CAUSED WIND DAMAGE IN ROBERT LEE AND GRAPE CREEK. SOME
LOCATIONS ACROSS THE NORTHWEST CONCHO VALLEY AND SOUTHWEST BIG
COUNTRY RECEIVED ONE HALF TO ONE INCH OF RAIN.

THE FLOW PATTERN ALOFT CHANGED LITTLE DURING THE MIDDLE OF THE
MONTH. WITH AN UNSTABLE AIRMASS AND WEAK UPPER LEVEL DISTURBANCES
IN THE REGION...SCATTERED SHOWERS AND THUNDERSTORMS OCCURRED EACH
DAY (FROM THE 11TH TO 17TH)...MAINLY DURING THE AFTERNOON AND
EVENING HOURS. ON THE 12TH...A SEVERE STORM PRODUCED GOLFBALL
SIZE HAIL 10 MILES NORTH OF ELDORADO...AND STRONG WINDS DAMAGED A
ROOF IN ABILENE.

ON THE 20TH...HURRICANE EMILY MADE LANDFALL ON THE COAST OF
MEXICO SOUTH OF BROWNSVILLE TEXAS...BEFORE TRACKING FARTHER WEST
INTO MEXICO. THE ONLY EFFECTS ON THE WEST CENTRAL TEXAS WEATHER
INCLUDED AN INCREASE IN HIGH CLOUDS...AND A SLIGHT INCREASE IN
MOISTURE.

BY LATE JULY...THE UPPER LEVEL HIGH PRESSURE SYSTEM COVERED MUCH
OF THE CENTRAL UNITED STATES. WEST CENTRAL TEXAS WAS ON THE
SOUTHERN PERIPHERY OF THIS SYSTEM.

A FEW STRONG TO SEVERE STORMS OCCURRED ON ON THE 23RD. A WIND
GUST OF 43 MPH WAS RECORDED IN ABILENE FROM A NEARBY THUNDERSTORM.
IN ADDITION...STRONG THUNDERSTORM WINDS DOWNED UTILITY POLES JUST
NORTHWEST OF MARYNEAL (NOLAN COUNTY). PENNY SIZE HAIL WAS REPORTED
IN MILLERSVIEW (CONCHO COUNTY).

IN JULY...COLD FRONTS USUALLY STALL OR DISSIPATE WELL TO THE
NORTH OF WEST CENTRAL TEXAS. LATE IN THE MONTH HOWEVER...AN
EXCEPTION OCCURRED. A TEMPORARY WEAKENING OF THE UPPER LEVEL
HIGH PRESSURE SYSTEM ALLOWED A COLD FRONT TO MOVE SOUTHWARD ACROSS
WEST CENTRAL TEXAS. THE APPROACH OF THIS FRONT TRIGGERED NUMEROUS
SHOWERS AND THUNDERSTORMS WITH HEAVY RAINFALL ACROSS THE BIG
COUNTRY AND NORTHWESTERN CONCHO VALLEY ON THE EVENING OF THE 26TH.
RAINFALL OF 1 TO 2 INCHES OCCURRED NORTH OF A LINE FROM CLYDE TO
STERLING CITY...WITH LOCALIZED 2 TO 3 INCH AMOUNTS. STRONG
THUNDERSTORM WINDS OVERTURNED THREE SEMI-TRUCKS ON INTERSTATE 20
NEAR ROSCOE AND DAMAGED A SILO.

AN UNUSUALLY COOL AIRMASS SETTLED INTO THE BIG COUNTRY ON THE
27TH AND 28TH...AND WAS ACCOMPANIED BY CONSIDERABLE CLOUDCOVER.
THIS HELD TEMPERATURES DOWN WITH READINGS WELL BELOW NORMAL FOR
LATE JULY. IN ABILENE...RECORD COOL HIGH TEMPERATURES (IN THE
LOWER TO MID 70S) WERE SET ON THE 27TH AND 28TH. FARTHER SOUTH
ACROSS WEST CENTRAL TEXAS...THE AIRMASS WAS MODIFIED AND HIGH
TEMPERATURES REACHED INTO THE 80S.

ON THE 27TH AND FROM THE 29TH TO 31ST...MOISTURE IN THE REGION
ALLOWED SCATTERED SHOWERS AND THUNDERSTORMS TO OCCUR IN VARIOUS
PARTS OF WEST CENTRAL TEXAS. A FEW LOCATIONS RECEIVED OVER AN
INCH OF RAINFALL.

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