WFO San Angelo Climatology

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
155 PM CST TUE FEB 1 2000

...UNUSUALLY WARM AND DRY CONDITIONS PREDOMINATED ACROSS WEST CENTRAL 
TEXAS THROUGH MOST OF JANUARY...

AT SAN ANGELO REGIONAL AIRPORT/MATHIS FIELD...THE MONTHLY MEAN 
TEMPERATURE FOR JANUARY WAS 50.8 DEGREES. THIS WAS 7.1 DEGREES ABOVE 
THE NORMAL AVERAGE JANUARY TEMPERATURE OF 43.7 DEGREES. THIS RANKS AS 
THE NINTH WARMEST JANUARY ON RECORD.  AT ABILENE REGIONAL 
AIRPORT...THE MONTHLY MEAN TEMPERATURE FOR JANUARY WAS 49.2 DEGREES. 
THIS WAS 6.4 DEGREES ABOVE THE NORMAL AVERAGE JANUARY TEMPERATURE OF 
42.8 DEGREES.

PRECIPITATION FOR JANUARY WAS WELL-BELOW NORMAL FOR BOTH ABILENE AND 
SAN ANGELO. THE TOTAL MONTHLY PRECIPITATION AT ABILENE WAS 0.17 
INCHES...COMPARED TO THE MONTHLY NORMAL OF 1.03 INCHES. SAN ANGELO 
RECEIVED ONLY 0.08 INCHES...COMPARED TO THE MONTHLY NORMAL OF 0.80 
INCHES.

DURING MOST OF JANUARY...THE UPPER LEVEL JET STREAM WAS DISPLACED 
WELL TO THE NORTH OF TEXAS. THIS ALLOWED A WARM AND DRY AIRMASS TO 
PREVAIL OVER TEXAS FOR EXTENDED PERIODS OF TIME...WITHOUT ANY 
SIGNIFICANT COLD AIR INTRUSIONS UNTIL LATE IN THE MONTH. SAN ANGELO 
ONLY HAD FIVE DAYS DURING THE MONTH WITH BELOW NORMAL AVERAGE 
TEMPERATURES. AT ABILENE...ONLY SIX DAYS DURING THE MONTH HAD BELOW 
NORMAL AVERAGE TEMPERATURES. RECORD HIGH TEMPERATURES WERE BROKEN ON 
THREE DAYS OF THE MONTH. AT SAN ANGELO...NEW RECORD HIGH TEMPERATURES 
WERE SET ON THE 11TH WITH 80 DEGREES...ON THE 12TH WITH 85 
DEGREES...AND ON THE 19TH WITH 87 DEGREES. AT ABILENE...NEW RECORD 
HIGH TEMPERATURES WERE SET ON THE 12TH WITH 82 DEGREES...AND ON THE 
19TH WITH 87 DEGREES.

OUTSIDE OF THE TRANQUIL WEATHER PATTERN WHICH DOMINATED MOST OF THE 
MONTH...A FEW UPPER LEVEL WEATHER SYSTEMS BROUGHT UNSETTLED WEATHER 
TO WEST CENTRAL TEXAS.

A STRONG UPPER LEVEL DISTURBANCE MOVED EASTWARD ACROSS THE SOUTHERN 
PLAINS ON THE 3RD. THE APPROACH OF THIS SYSTEM ON THE NIGHT OF THE 
2ND BROUGHT SCATTERED SHOWERS AND A FEW THUNDERSTORMS TO THE BIG 
COUNTRY. MEASURABLE RAIN OCCURRED NORTH OF A LINE FROM ROBERT LEE TO 
BROWNWOOD. RAINFALL AMOUNTS WERE GENERALLY LESS THAN ONE TENTH OF AN 
INCH...BUT A EW LOCATIONS NORTH OF INTERSTATE 20 RECEIVED AMOUNTS 
RANGING FROM ONE TENTH TO EIGHT TENTHS OF AN INCH. THIS SYSTEM 
BROUGHT VERY WINDY CONDITIONS TO WEST CENTRAL TEXAS ON THE 3RD. 
ABILENE REPORTED A PEAK WIND GUST OF 48 MPH...AND SAN ANGELO A PEAK 
WIND GUST OF 47 MPH. AT JUNCTION...THE PEAK WIND GUST WAS 41 MPH. 
THIS SYSTEM ALSO BROUGHT AREAS OF BLOWING DUST ON THE 3RD TO THE BIG 
COUNTRY...CONCHO VALLEY AND HEARTLAND. VISIBILITIES WERE REDUCED INTO 
THE 1 TO 3 MILE RANGE...WITH LOCALIZED REDUCTION TO LESS THAN 1 MILE.

AN UPPER LEVEL DISTURBANCE MOVED NORTHEAST ACROSS WEST TEXAS ON THE 
7TH...AND BROUGHT MOSTLY LIGHT RAIN TO MOST OF THE REGION. AMOUNTS 
WERE GENERALLY LESS THAN ONE TENTH OF AN INCH...BUT SOME LOCATIONS 
RECEIVED HEAVIER AMOUNTS. WIDELY SCATTERED LOCATIONS ACROSS THE 
EASTERN CONCHO VALLEY AND HEARTLAND RECEIVED ONE QUARTER TO THREE 
QUARTERS OF AN INCH. NORTHWEST STERLING COUNTY RECEIVED AMOUNTS 
RANGING FROM ONE HALF INCH TO 1.7 INCHES.

ANOTHER VIGOROUS UPPER LEVEL DISTURBANCE MOVED EAST ACROSS THE 
SOUTHERN PLAINS ON THE 9TH...AND BROUGHT GUSTY WINDS AND SOME 
BLOWING DUST ONCE AGAIN TO WEST CENTRAL TEXAS. THE BLOWING DUST 
AFFECTED THE BIG COUNTRY...NORTHERN CONCHO VALLEY AND HEARTLAND. 
VISIBILITIES WERE GENERALLY REDUCED INTO THE 3 TO 5 MILE 
RANGE...WITH LOCALIZED REDUCTION TO 1 MILE OR LESS. ABILENE AND SAN 
ANGELO BOTH RECORDED A PEAK WIND GUST OF 43 MPH ON THE 9TH.

AN UPPER LEVEL STORM SYSTEM MOVED ACROSS NORTH TEXAS ON THE 27TH. 
THIS SYSTEM BROUGHT MUCH COLDER TEMPERATURES TO WEST CENTRAL TEXAS. 
IN ADDITION...THIS SYSTEM BROUGHT MIXED PRECIPITATION TO THE BIG 
COUNTRY. FREEZING DRIZZLE...PATCHY LIGHT FREEZING RAIN AND SLEET 
OCCURRED...BUT ICE ACCUMULATIONS WERE MINOR. FARTHER TO THE 
SOUTH...SCATTERED RAINSHOWERS OCCURRED. THE RAINSHOWERS WERE MOST 
NUMEROUS EAST OF A BALLINGER TO JUNCTION LINE. RAINFALL AMOUNTS 
GENERALLY VARIED UNDER ONE QUARTER OF AN INCH...BUT A FEW LOCATIONS 
ACROSS THE HEARTLAND RECEIVED BETWEEN ONE QUARTER AND ONE HALF INCH. 
A FEW SNOW FLURRIES FELL ACROSS WEST CENTRAL TEXAS ON THE 28TH...BUT 
NONE OF THE SNOW ACCUMULATED.  

NO SEVERE WEATHER WAS REPORTED ACROSS WEST CENTRAL TEXAS DURING 
JANUARY.