Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 52, NWS Corpus Christi, TX

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

NWS Corpus Christi, TX issued this flash flood warning at Sep 9, 2002, 2:32 AM CDT for La Salle County, McMullen County, Texas. It was in force for 4 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, 2:32 AM CDT (07:32 UTC)
Expired
Sep 9, 2002, 6:30 AM CDT
In force
4 hr
Issued by
NWS Corpus Christi, TX
Area
Counties, with a storm outline in the text

Counties La Salle County, TX, McMullen 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, 7.5 hours before the alert went out and 179 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-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 2002-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1869 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 2002-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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 090732
FFWCRP
TXC283-311-091130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
230 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

* UNTIL 630 AM CDT

* AT 225 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A LARGE AREA OF VERY HEAVY RAIN OVER MUCH OF MCMULLEN AND LA SALLE 
  COUNTIES. THIS AREA HAS BEEN STATIONARY FOR THE PAST SEVERAL       
  HOURS. 
  
THE HEAVIEST RAINFALL CONTINUES ALONG THE LA SALLE-MCMULLEN COUNTY 
LINE NEAR FOWLERTON.  RADAR RAINFALL WAS ESTIMATED BETWEEN 8 TO 12 
INCHES OVER THIS AREA.     

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.

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 2858 9936 2810 9936 2806 9920 2812 9847
          2863 9840

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, 4 hours 37 minutes earlier.

Area forecast discussion, Sep 8, 9:55 PM CDT, 4 hours 37 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 8, 10:15 PM CDT, 4 hours 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
1015 PM CDT SUN SEP 8 2002

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

1000 PM    ALICE                     TX   FLOOD
09/08/02   JIM WELLS

1000 PM    ALICE                     TX   FLOOD
09/08/02   JIM WELLS                      STREET FLOODING REPORTED
                                          BY SHERIFF

1000 PM    4 SW BEN BOLT             TX   TORNADO
09/08/02   JIM WELLS                      TORNADO SPOTTED ON GROUND
                                          BY PUBLIC NEAR FM 625 AND
                                          CR 464

1015 PM    4 SW  BEN BOLT            TX   TORNADO
09/08/02   JIM WELLS                      TORNADO SPOTTED ON GROUND
                                          BY PUBLIC NEAR FM 625 AND
                                          CR 464 NO DAMAGE
Local storm report, Sep 8, 10:30 PM CDT, 4 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
1030 PM CDT SUN SEP 8 2002

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

1000 PM    ALICE                     TX   FLOOD
09/08/02   JIM WELLS                      STREET FLOODING REPORTED
                                          BY SHERIFF

1015 PM    4 SW  BEN BOLT            TX   TORNADO
09/08/02   JIM WELLS                      TORNADO SPOTTED ON GROUND
                                          BY PUBLIC NEAR FM 625 AND
                                          CR 464 NO DAMAGE
Local storm report, Sep 8, 11:39 PM CDT, 2 hours 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
1139 PM CDT SUN SEP 8 2002

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

1023 PM    5 S BEN BOLT              TX   TORNADO
09/08/02   JIM WELLS                      TORNADO ON GROUND FOR
                                          SEVERAL MINUTES REPORTED
                                          BY PUBLIC DRIVING ON
                                          HIGHWAY 281

TR
Local storm report, Sep 9, 1:17 AM CDT, 1 hour 15 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.

IssuedProductOfficeCountiesLasted
Sep 8, 9:21 PM CDTFlash Flood WarningCRPJim Wells3 hr
Sep 8, 9:55 PM CDTTornado WarningCRPJim Wells35 min
Sep 8, 10:46 PM CDTTornado WarningCRPJim Wells44 min
Sep 8, 11:41 PM CDTFlash Flood WarningCRPLa Salle, McMullen3 hr
Sep 9, 12:18 AM CDTFlash Flood WarningCRPJim Wells4 hr
Sep 9, 6:29 AM CDTFlash Flood WarningCRPLa Salle, McMullen, Webb3 hr
Sep 9, 9:36 AM CDTFlash Flood WarningCRPLa Salle, McMullen3 hr
Sep 9, 4:47 PM CDTFlash Flood WarningCRPLa Salle, Webb118 min
Sep 9, 6:48 PM CDTFlash Flood WarningCRPWebb87 min

Nearby

Flash Flood Warnings in Texas, 2002Every 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.