Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 53, NWS Corpus Christi, TX

September 9, 2002La Salle County, McMullen County, Webb County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Sep 9, 2002, 6:29 AM CDT for La Salle County, McMullen County, Webb County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 9, 2002, 6:29 AM CDT (11:29 UTC)
Expired: Sep 9, 2002, 9:30 AM CDT
In force: 3 hr
Issued by: NWS Corpus Christi, TX
Area: Counties, with a storm outline in the text

Counties La Salle County, TX, McMullen County, TX, Webb County, TX

Did it verify

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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 11.5 hours before the alert went out and 159 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1869 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 51 m²/s²
0-3 km storm-relative helicity: 57 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KCRP 091129
FFWCRP
TXC283-311-479-091430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
627 AM CDT MON SEP 9 2002

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LA SALLE COUNTY IN TEXAS
  MCMULLEN COUNTY IN TEXAS
  EASTERN WEBB COUNTY IN TEXAS

* UNTIL 930 AM CDT

* AT 623 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A LARGE AREA OF SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAIN   
  OVER MUCH OF MCMULLEN...LA SALLE AND EASTERN WEBB COUNTIES. 

RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATED 3 TO 5 INCHES OVER 
LA SALLE AND EASTERN WEBB COUNTIES DURING THE PAST 3 HOURS.   

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 2863 9837 2863 9919 2809 9943 2777 9933
          2765 9925 2781 9904 2830 9866 2807 9882
          2809 9840

1 follow-up statement

000 
WGUS74 KCRP 091244
FFSCRP
TXC283-311-479-091430-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
740 AM CDT MON SEP 9 2002

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR THE COUNTIES OF LA 
SALLE...MCMULLEN AND EASTERN WEBB UNTIL 930 AM CDT MONDAY MORNING...

AT 735 AM...DOPPLER RADAR INDICATED AN AREA OF SHOWERS AND 
THUNDERSTORMS OVER LA SALLE...NORTHERN MCMULLEN...AND EASTERN WEBB 
COUNTIES.  LITTLE MOVEMENT WAS NOTED DURING THE PAST HOUR. THIS AREA 
HAS BEEN SLOWLY DECREASING IN COVERAGE DURING THE PAST HOUR.  RADAR 
ESTIMATED RAINFALL WAS BETWEEN 1 TO 3 INCHES OVER THE AREA.  

EXTENSIVE FLOODING WAS REPORTED IN THE FOWLERTON AREA.  MUSTANG 
CREEK WAS OVER ITS BANKS AND SOME RESIDENTS WERE EVACUATED FROM 
THEIR HOMES EARLY THIS MORNING.  FLOODING WAS ALSO REPORTED IN THE 
TILDEN AREA ALONG HIGHWAY 72.  

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. PEOPLE IN THE WARNED AREA SHOULD TAKE ALL THE NECESSARY
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. MOVE TO HIGHER GROUND
IMMEDIATELY.

FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT
HTTP://WWW.SRH.NOAA.GOV/CRP

$$

AP

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Corpus Christi, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 8, 9:55 PM CDT, 8 hours 34 minutes earlier.

Area forecast discussion, Sep 8, 9:55 PM CDT, 8 hours 34 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
955 PM CDT SUN SEP 8 2002

CENTER OF FAY CURRENTLY LOCATED JUST TO THE NORTH OF COTULLA.  WV
LOOP SHOWING UPR LOW WOBBLING EAST AS SPOKES OF VORTICITY ROTATE
AROUND THE BASE OF THE LOW.  AVN/MESO-ETA IN AGREEMENT WITH
DEVELOPING HIGH OMEGA VALUES AFTER MIDNIGHT TONIGHT UNDER PVA.
CONCERN IS THAT CORE RAINS NEAR THE SFC LOW WILL DEVELOP TONIGHT AND
DIFFLUENCE ALOFT OVER THE E CWA COMBINED WITH LOW LEVEL CONFLUENCE
PATTERN WILL DEVELOP A GOOD BANDING PATERN OVER THE E CWA SIMILAR TO
WHAT OCCURRED LAST NIGHT.  PLEASE SEE FFSCRP FOR MORE INFO.

FOR THE UPDATE WILL MAKE SOME MINOR CHANGES TO THE POPS AND WINDS.
WILL KNOCK LRD POP DOWN AS DRY SUBSIDENT FLOW OFF SIERRA IS
INHIBITING CONVECTION.

MARINE...WILL INCREASE WINDS MAINLY OFFSHORE FOR TONIGHT AS WINDS
GOING GOOD AND STRONG.  WILL MAKE A FEW OTHER COSMETIC CHANGES
OTHERWISE NOTHING ELSE DONE.

.CRP...SCA GMZ250-255-270-275.

92/TR...SYNOPTIC
86/GW...MARINE
.CRP...FFA TXZ229>234-239>247 (ALL AREA)
       SCA GMZ250-255-270-275 (COASTAL/OFFSHORE).

In the hours before

Local storm report, Sep 9, 1:17 AM CDT, 5 hours 12 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
117 AM CDT MON SEP 9 2002

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1210 AM    ALICE                     TX   FLOOD
09/09/02   JIM WELLS                      COUNTY ROADS NEAR HIGHWAY
                                          44 AND BUSINESS HIGHWAY
                                          281 CLOSED DUE TO
                                          FLOODING.

AP

The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 8, 9:21 PM CDT	Flash Flood Warning	CRP	Jim Wells	3 hr
Sep 8, 9:55 PM CDT	Tornado Warning	CRP	Jim Wells	35 min
Sep 8, 10:46 PM CDT	Tornado Warning	CRP	Jim Wells	44 min
Sep 8, 11:41 PM CDT	Flash Flood Warning	CRP	La Salle, McMullen	3 hr
Sep 9, 12:18 AM CDT	Flash Flood Warning	CRP	Jim Wells	4 hr
Sep 9, 2:32 AM CDT	Flash Flood Warning	CRP	La Salle, McMullen	4 hr
Sep 9, 9:36 AM CDT	Flash Flood Warning	CRP	La Salle, McMullen	3 hr
Sep 9, 4:47 PM CDT	Flash Flood Warning	CRP	La Salle, Webb	118 min
Sep 9, 6:48 PM CDT	Flash Flood Warning	CRP	Webb	87 min

Nearby

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

Sources

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.