WFO San Angelo Climatology

...TEMPERATURES AVERAGED ABOVE NORMAL IN OCTOBER...

TEMPERATURES FOR THE MONTH AVERAGED ABOVE NORMAL...AND
THIS WAS DUE PRIMARILY TO THE DAILY HIGH TEMPERATURES.

PRECIPITATION FOR OCTOBER VARIED WIDELY ACROS THE REGION.
ALMOST ALL OF THE PRECIPITATION OCCURRED WITH ONE EVENT
LATE IN THE MONTH.

THE MONTHLY TOTAL PRECIPITATION WAS NEAR TO ABOVE NORMAL
ALONG A COUPLE OF BANDS WITH A SOUTHWEST TO NORTHEAST
ORIENTATION ACROSS THE REGION. THE AMOUNTS WERE IN THE
2 TO 4 INCH RANGE ACROSS ALONG AND NORTHWEST OF A LINE
FROM STERLING CITY TO ABILENE TO ALBANY...AND EXTENDING
INTO PARTS OF EASTERN THROCKMORTON COUNTY. TWO TO FOUR
INCH AMOUNTS WERE ALSO ALONG A 25-MILE WIDE BAND EXTENDING
FROM NORTHERN CROCKETT COUNTY TO EAST-CENTRAL TOM GREEN
COUNTY TO NORTHWESTERN COLEMAN AND SOUTHEASTERN CALLAHAN
COUNTIES. FOR MOST OF THE REST OF WEST CENTRAL TEXAS...
THE MONTHLY PRECIPITATION WAS WELL BELOW NORMAL. THIS
INCLUDED THE FAR NORTHWESTERN BIG COUNTRY...A FEW POCKETS
ACROSS THE FAR WESTERN CONCHO VALLEY...AND MUCH OF THE
AREA ALONG SOUTHEAST OF A LINE FROM SONORA TO LAKE
BROWNWOOD...AND IN FAR SOUTHERN CROCKETT COUNTY. ACROSS
THESE AREAS...THE MONTHLY AMOUNTS VARIED MOSTLY UNDER
ONE HALF INCH. FOR A NUMBER OF LOCATIONS WITHIN THIS AREA...
AMOUNTS WERE LESS THAN 10 PERCENT OF NORMAL FOR THE MONTH.

AT ABILENE REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR
OCTOBER WAS 67.5 DEGREES. THIS WAS 1.5 DEGREES ABOVE THE
NORMAL AVERAGE TEMPERATURE OF 66.0 DEGREES. TOTAL
PRECIPITATION FOR ABILENE IN OCTOBER WAS 1.52 INCHES. THIS
WAS 1.38 INCHES BELOW THE MONTHLY NORMAL OF 2.90 INCHES.

AT SAN ANGELO REGIONAL AIRPORT...THE AVERAGE TEMPERATURE
FOR OCTOBER WAS 67.9 DEGREES. THIS WAS 2.5 DEGREES ABOVE
THE NORMAL AVERAGE TEMPERATURE OF 65.4 DEGREES. TOTAL
PRECIPITATION FOR SAN ANGELO IN OCTOBER WAS 2.51 INCHES.
THIS WAS 0.06 INCHES BELOW THE MONTHLY NORMAL OF 2.57
INCHES.

OCTOBER 2010 WEATHER HIGHLIGHTS...

HIGH PRESSURE SYSTEMS WERE OVER THE REGION DURING MOST OF
THE MONTH. THE AIRMASSES WERE DRY WITH A LACK OF CLOUD
COVER. THIS RESULTED IN A PATTERN WITH LARGER RANGES
BETWEEN THE DAILY HIGH TEMPERATURES AND OVERNIGHT LOWS.
THE DAILY HIGH TEMPERATURES WERE ABOVE NORMAL...ESPECIALLY
ACROSS CENTRAL AND SOUTHERN PARTS OF WEST CENTRAL TEXAS.
THE NUMBER OF DAYS WHERE HIGH TEMPERATURES REACHED 88
DEGREES OR MORE INCLUDED...
11 AT SAN ANGELO
6 AT JUNCTION
ZERO AT ABILENE (HIGHEST TEMPERATURE WAS 87)

AFTER A COLD FRONTAL PASSAGE ON THE 2ND...TEMPERATURES
WERE MUCH COOLER ACROSS NORTHERN AND CENTRAL SECTIONS OF
WEST CENTRAL TEXAS ON THE 3RD. TEMPERATURES WERE LIMITED
TO HIGHS IN THE MID TO UPPER 60S ACROSS THE BIG COUNTRY.
THE MUCH COOLER TEMPERATURES WERE PARTLY THE RESULT OF
EXTENSIVE CLOUD COVER...WHICH ACCOMPANIED AN UPPER LEVEL
DISTURBANCE MOVING INTO THE REGION FROM THE NORTHWEST. A
FEW LIGHT RAIN SHOWERS OCCURRED ON THE 3RD IN THE
NORTHWESTERN CONCHO VALLEY AND WESTERN BIG COUNTRY.
CLEARING SKIES DURING THE OVERNIGHT HOURS OF THE 3RD AND
4TH ALLOWED TEMPERATURES TO DIP INTO THE 40S FOR LOWS
ON THE EARLY MORNING OF THE THE 4TH...ACROSS NEARLY ALL
OF WEST CENTRAL TEXAS.

WITH THE INFLUENCE OF HIGH PRESSURE AT THE SURFACE AND
ALOFT...DRY CONDITIONS PREVAILED DURING THE EARLY PART OF
THE MONTH...WITH WARM AFTERNOONS AND COOL NIGHTTIME
TEMPERATURES.  

A FEW SHOWERS AND THUNDERSTORMS OCCURRED ACROSS PARTS OF
WEST CENTRAL TEXAS ON THE 10TH AND 11TH...IN ASSOCIATION
WITH WEAK UPPER LEVEL DISTURBANCES AND THE APPROACH AND
ARRIVAL OF A WEAK COLD FRONT. RAINFALL AMOUNTS VARIED
UNDER ONE HALF INCH. COOLER AND DRIER AIR FOLLOWED A
STRONGER COLD FRONTAL PASSAGE ON THE 12TH.

TEMPERATURES DIPPED INTO THE UPPER 30S TO LOWER 40S FOR
LOWS...ACROSS MUCH OF WEST CENTRAL TEXAS ON 14TH...AND
ACROSS SOME OF THE REGION SOUTH OF INTERSTATE 20 ON THE
15TH.

FROM THE LATE HOURS OF THE 18TH INTO THE POST-MIDNIGHT
HOURS OF THE 19TH...SCATTERED SHOWERS AND THUNDERSTORMS
OCCURRED ACROSS THE NORTHERN HALF OF WEST CENTRAL TEXAS.
THESE WERE ASSOCIATED WITH AN UPPER LEVEL DISTURBANCE AND
APPROACH OF A COLD FRONT. LOCALLY HEAVY RAINFALL BETWEEN
1.5 AND 3 INCHES OCCURRED ACROSS PARTS OF FISHER COUNTY.
WIDELY SCATTTERED LOCATIONS ACROSS THE BIG COUNTRY AND
FAR NORTHERN CONCHO VALLEY RECEIVED BETWEEN ONE HALF INCH
AND 1.5 INCHES. ELSEWHERE THE AMOUNTS VARIED UNDER ONE
HALF INCH.

MORE ABRUPT CHANGES IN THE WEATHER PATTERN OCCURRED LATE
IN THE MONTH.

A HEAVY RAIN EVENT OCCURRED LATE IN THE MONTH. WITH THE
APPROACH OF AN UPPER LEVEL DISTURBANCE FROM NORTHERN
MEXICO AND A DRYLINE RETREATING TO THE WEST...SHOWERS
AND THUNDERSTORMS DEVELOPED AND BECAME NUMEROUS DURING
THE EARLY MORNING OF THE 23RD. ONE OF THE STORMS BECAME
STRONG AND PRODUCED HAIL...FREQUENT LIGHTNING...AND VERY
HEAVY RAINFALL. NICKEL TO QUARTER SIZE HAIL WAS REPORTED
IN GRAPE CREEK. A PEAK WIND GUST OF 41 MPH WAS RECORDED AT
THE SAN ANGELO REGIONAL AIRPORT. FLASH FLOODING OF STREETS
WAS REPORTED AT SEVERAL LOCATIONS IN SAN ANGELO. A NEW
DAILY RAINFALL RECORD OF 2.51 INCHES WAS RECORDED AT SAN
ANGELO REGIONAL AIRPORT ON THE 23RD. RAINFALL AMOUNTS OF
2 TO 3 INCHES OCCURRED ACROSS MUCH OF THE AREA NORTHWEST
OF A LINE FROM CROSS PLAINS TO SAN ANGELO TO OZONA. SOME
LOCATIONS ACROSS NORTHERN CROCKETT COUNTY...THE CONCHO
VALLEY EAST OF SAN ANGELO...AND THE BIG COUNTRY NORTH AND
WEST OF ABILENE...RECEIVED OVER 3 INCHES OF RAIN. 

WITH VERY WARM AND DRY AIR OVER THE REGION ON THE 25TH...
TEMPERATURES REACHED THE 90 TO 95 DEGREE RANGE FOR HIGHS
ACROSS CENTRAL AND SOUTHERN PARTS OF WEST CENTRAL TEXAS.
TEMPERATURES ALSO REACHED OR EXCEEDED 90 DEGREES FOR
HIGHS...ON THE 27TH...AT SOME LOCATIONS IN SOUTHERN PARTS
OF WEST CENTRAL TEXAS.

FOLLOWING A COLD FRONTAL PASSAGE ON THE 27TH...A HIGH
PRESSURE SYSTEM SETTLED INTO AREA. WITH DRY AIR...CLEAR
SKIES AND LIGHT WINDS...TEMPERATURES DIPPED INTO THE 30S
FOR LOWS ON THE 29TH. SCATTERED FROST OCCURRED...ALONG
WITH A LIGHT FREEZE AT SOME LOCATIONS. THE COLDEST LOW
TEMPERATURES INCLUDED 25 DEGREES AT A LOCATION 4 MILES
SOUTH-SOUTHWEST OF JUNCTION...AND 27 DEGREES AT FORT
MCKAVETT AND MENARD. A FEW LOCATIONS ACROSS SOUTHERN
PARTS OF WEST CENTRAL TEXAS HAD SIMILAR LOW TEMPERATURES
ON THE 30TH. TEMPERATURES REBOUNDED STRONGLY AND AFTERNOON
HIGHS ON THE 30TH WERE IN THE 80S. 

TEMPERATURES WERE VERY WARM ON THE AFTERNOON OF THE 31ST...
WHEN HIGHS REACHED THE UPPER 80S TO MID 90S ACROSS THE
REGION. A NEW RECORD HIGH TEMPERATURE WAS SET AT SAN
ANGELO.

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