A strong, long-duration atmospheric river will bring excessive rainfall, flash flooding, and very strong winds to southwest Oregon and northwest California through Thursday. A High Risk (level 4 of 4) of Excessive Rainfall has been issued. A storm system over the northern Plains will produce locally heavy snow in North Dakota and northwestern Minnesota. Read More >
PUBLIC INFORMATION STATEMENT NATIONAL WEATHER SERVICE SAN ANGELO TX 150 AM CDT TUE SEP 20 2005 ...A SIGNIFICANT FLOOD EVENT OCCURRED IN MID-AUGUST... ...10TH COOLEST AUGUST ON RECORD FOR SAN ANGELO... PRECIPITATION WAS ABOVE NORMAL AND TEMPERATURES AVERAGED BELOW NORMAL ACROSS WEST CENTRAL TEXAS IN AUGUST. AREAS OF THE BIG COUNTRY...CONCHO VALLEY AND HEARTLAND RECEIVED MUCH ABOVE NORMAL RAINFALL. THIS WAS MOST PRONOUNCED ACROSS THE NORTHERN AND WESTERN BIG COUNTRY AND NORTHWESTERN CONCHO VALLEY. AT ABILENE REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR AUGUST WAS 80.5 DEGREES. THIS WAS 2.1 DEGREES BELOW THE NORMAL AVERAGE TEMPERATURE OF 82.6 DEGREES. TOTAL PRECIPITATION FOR AUGUST WAS 4.43 INCHES. THIS WAS 1.80 INCHES ABOVE THE NORMAL OF 2.63 INCHES. ABILENE RECORDED NO DAYS WHERE THE HIGH TEMPERATURE REACHED 100 DEGREES OR MORE. AT SAN ANGELO REGIONAL AIRPORT...THE AVERAGE TEMPERATURE FOR AUGUST WAS 80.0 DEGREES. THIS WAS 1.3 DEGREES BELOW THE NORMAL AVERAGE TEMPERATURE OF 81.3 DEGREES. THIS TIED THE 10TH COOLEST AUGUST ON RECORD FOR SAN ANGELO. TOTAL PRECIPITATION FOR AUGUST WAS 4.66 INCHES. THIS WAS 2.61 INCHES ABOVE THE MONTHLY NORMAL OF 2.05 INCHES. SAN ANGELO RECORDED NO DAYS WHERE THE HIGH TEMPERATURE REACHED 100 DEGREES OR MORE. JUNCTION RECORDED 3.01 INCHES OF PRECIPITATION FOR AUGUST. THE HIGH TEMPERATURE REACHED 100 DEGREES OR MORE ON 2 DAYS AT JUNCTION. AUGUST 2005 WEATHER HIGHLIGHTS... COOLER AND MUCH WETTER THAN NORMAL CONDITIONS PREVAILED THROUGH THE FIRST HALF OF AUGUST...WHILE THE SECOND HALF OF THE MONTH WAS DRY AND WARMER. WITH MOISTURE IN THE REGION...AN UPPER LEVEL DISTURBANCE BROUGHT NUMEROUS SHOWERS AND THUNDERSTORMS TO WEST CENTRAL TEXAS ON THE AFTERNOON AND EVENING OF THE 3RD. THE COVERAGE OF SHOWERS AND STORMS WAS GREATEST SOUTH OF INTERSTATE 20. SCATTERED LOCATIONS RECEIVED 1 TO 2 INCHES OF RAIN. NUMEROUS SHOWERS AND STORMS OCCURRED AGAIN ON THE AFTERNOON AND EARLY NIGHTTIME HOURS OF THE 4TH. A FEW STRONG STORMS PRODUCED WIND GUSTS TO 49 MPH AT THE ABILENE REGIONAL AIRPORT...AND TO 45 MPH AT JUNCTION. SCATTERED LOCATIONS SOUTHEAST OF A LINE FROM HASKELL TO ABILENE TO STERLING CITY RECEIVED FROM 1.5 TO 3 INCHES OF RAINFALL...WITH LOCALIZED AMOUNTS OVER 3 INCHES. SCATTERED SHOWERS AND THUNDERSTORMS OCCURRED IN WEST CENTRAL TEXAS ON THE 7TH AND 9TH. NUMEROUS SHOWERS AND STORMS AFFECTED NORTHERN AND CENTRAL SECTIONS OF THE REGION ON THE 8TH. SOME LOCATIONS ACROSS THE BIG COUNTRY...HEARTLAND AND CONCHO VALLEY RECEIVED 1 TO 2 INCHES OF RAINFALL...WITH LOCALIZED HIGHER AMOUNTS. * SIGNIFICANT FLOOD EVENT IN MID-AUGUST * THE ACCUMULATED RAINFALL DURING THE EARLY PART OF THE MONTH SATURATED THE GROUND...ESPECIALLY IN THE BIG COUNTRY. THIS SET THE STAGE FOR SIGNIFICANT FLOODING WHEN A VERY WET PERIOD OCCURRED FROM THE 13TH TO 17TH. DURING THAT TIME SEVERAL ROUNDS OF SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN OCCURRED IN WEST CENTRAL TEXAS. THE GREATEST AND MOST PERSISTENT ACTIVITY AFFECTED THE BIG COUNTRY AND NORTHERN CONCHO VALLEY. THE LEAST AMOUNT OF RAIN (LESS THAN ONE HALF INCH) OCCURRED ALONG THE SOUTHERN AND SOUTHEASTERN FRINGES OF WEST CENTRAL TEXAS. RAINFALL TOTALS RANGED FROM 1 TO 3 INCHES OCCURRED ACROSS AREAS SOUTH OF A MERTZON TO SAN ANGELO TO ABILENE LINE. NORTH OF THIS LINE THE RAINFALL WAS GENERALLY ABOVE 3 INCHES ACROSS A LARGE AREA. AMOUNTS OF 5 TO 10 INCHES OCCURRED IN THE NORTHERN AND WESTERN BIG COUNTRY AND NORTHWEST CONCHO VALLEY. ROTAN REPORTED THE HIGHEST TOTAL OF 11.22 INCHES. THE VERY HEAVY RAIN CAUSED SIGNIFICANT FLOODING ACROSS MUCH OF THE NORTHERN AND WESTERN BIG COUNTRY. RESIDENCES AROUND LAKE STAMFORD EXPERIENCE MAJOR FLOODING WHEN THE LAKE LEVEL ROSE WELL ABOVE THE SPILLWAY. MAJOR LOWLAND FLOODING OCCURRED ALONG THE CLEAR FORK OF THE BRAZOS RIVER NEAR FORT GRIFFIN. THIS AFFECTED NUMEROUS SECONDARY ROADS IN THE VICINITY...ALONG WITH PARTS OF FORT GRIFFIN STATE PARK. MODERATE FLOODING OCCURRED ALONG THE CALIFORNIA CREEK NEAR STAMFORD. FLOODING ALSO AFFECTED NUMEROUS OTHER ROADS ACROSS HASKELL...THROCKMORTON...JONES AND FISHER COUNTIES. THIS HISTORICAL FLOODING WAS THE MOST SIGNIFICANT AT LAKE STAMFORD SINCE 1978. A SIMILAR CREST ON THE CLEAR FORK OF THE BRAZOS RIVER WAS LAST OBSERVED IN 1957. FOR THE CALIFORNIA CREEK NEAR STAMFORD...A SIMILAR CREST WAS LAST OBSERVED IN 1962. A PERIOD OF SEASONABLY HOT WEATHER OCCURRED LATE IN THE MONTH... UNDER THE INFLUENCE OF A HIGH PRESSURE SYSTEM ALOFT OVER THE REGION. A THUNDERSTORM COMPLEX WITH HEAVY RAIN AND GUSTY WINDS MOVED DOWN ACROSS WEST CENTRAL TEXAS DURING THE OVERNIGHT HOURS OF THE 27TH AND 28TH. PEAK WIND GUSTS OF 43 MPH OCCURRED AT JUNCTION AND 41 MPH AT SAN ANGELO. THIS SYSTEM BROUGHT RAINFALL AMOUNTS OF 1 TO 1.5 INCHES ACROSS MUCH OF THE REGION SOUTH OF INTERSTATE 20...WITH GREATER THAN 2 INCH AMOUNTS IN SCATTERED POCKETS. $$