Flash Flood Warning 25, NWS San Angelo, TX

Issued

Jul 2, 2002, 11:46 PM CDT (04:46 UTC)

Expired

Jul 3, 2002, 5:45 AM CDT

In force

6 hr

Issued by

NWS San Angelo, TX

Area

Counties, with a storm outline in the text

County San Saba County, TX

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

000 
WGUS54 KSJT 030446
FFWSJT
TXC411-031045-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
1145 PM CDT TUE JUL 2 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SAN SABA COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 545 AM CDT

* AT 1128 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN FROM CHAPPEL AND SAN SABA...TO THE COLORADO RIVER...MOVING     
  SLOWLY NORTH.  

THESE THUNDERSTORMS ARE PRODUCING HOURLY RAINFALL RATES OF 1 TO 2 
INCHES...CENTERED OVER THE COLORADO RIVER. DUE TO THE SLOW MOVEMENT 
OF THESE THUNDERSTORMS...RAINFALL TOTALS COULD EXCEED 5 INCHES 
LOCALLY.   

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3128 9890 3094 9877 3094 9852 3121 9860
          3136 9872 3140 9888

NWS San Angelo, TX wrote its last area forecast discussion before this flash flood warning went out at Jul 2, 2:33 PM CDT, 9 hours 13 minutes earlier.

WEST CENTRAL TEXAS FORECAST DISCUSSION...CORRECTED HEADLINE
NATIONAL WEATHER SERVICE SAN ANGELO TX
233 PM CDT TUE JUL 2 2002

TROPICAL AIRMASS THUNDERSTORMS CONTINUE OVER SC TX THIS AFTERNOON...
SLIGHTLY WEST YESTERDAY/S POSITION. SCATTERED CONVECTION HAD WORKED
ITS WAY INTO THE CONCHO VALLEY THIS...BUT FOR THE MOST PART...RAIN
CONTINUED TO EAST OF AN UPPER LEVEL TROF AXIS EXTENDING FROM DEL RIO
TO WICHITA FALLS. GOES IR IMAGERY INDICATED WARMING CLOUD TOPS OVER
SC TX IN THE PAST 2 HOURS.

NCEP MODELS ARE CONSISTENT WITH EARLIER RUNS IN MOVING THE UPPER
TROF SLOWLY SOUTHWEST TONIGHT THROUGH THURSDAY...UNDER A BUILDING
UPPER RIDGE OVER THE CENTRAL HIGH PLAINS. STILL APPEARS THAT
WEDNESDAY HOLDS THE HIGHEST POTENTIAL FOR RAINFALL OVER WC TX. AS
WITH PREVIOUS FORECASTS...WILL UNDERCUT MODEL POPS SLIGHTLY OVER THE
BIG COUNTRY...DUE TO THE MODELS CONSISTENT WET BIAS OVER THE NORTH.
FOR THE SOUTHEAST ZONES...EXPECT FLASH FLOOD THREAT TO HOLD OFF
UNTIL AFTER MIDNIGHT. WILL EXTEND THE FLASH FLOOD WATCH INTO
WEDNESDAY... INCLUDING SUTTON COUNTY. 12Z DRT SOUNDING SHOWS PRECIP
WATER VALUE OF 1.7 INCHES...AND A NEARLY SATURATED LAYER UP THROUGH
650 MB.

LOW LEVEL MOISTURE REMAINS FOR THE FOURTH OF JULY HOLIDAY...WITH
SURFACE DEWPOINTS IN THE MID AND UPPER 60S. INVERTED UPPER LEVEL
TROF IS PROGGED FURTHER SOUTHWEST OF THE FORECAST AREA AND SHEARED
NORTHWEST THROUGH THE PERMIAN BASIN. MOSTLY CLOUDY SKIES A GOOD BET
FOR WC TX MOST OF THE DAY. DIFFERENTIAL SURFACE HEATING WILL LIKELY
AID SCATTERED THUNDERSTORM DEVELOPMENT...AS CONVECTIVE INHIBITION
REMAINS WEAK. WILL MAINTAIN CHANCE/SLIGHT CHANCE POPS FOR THE
HOLIDAY.

MID LEVEL TEMPS WARM FRIDAY...AS THE UPPER TROF IS SHEARED OUT UNDER
A BUILDING RIDGE. WEEKEND APPEARS DRY...WITH SEASONAL TEMPS.

ABI 069/084/069/089/071 3422
SJT 071/083/070/089/072 4533
JCT 071/081/070/089/072 5522

.SJT...FLASH FLOOD WATCH TONIGHT AND WEDNESDAY FOR MASON...MENARD...
MCCULLOCH... KIMBLE...SAN SABA AND SUTTON COUNTIES.

14

Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.