Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 34, NWS Corpus Christi, TX

July 15, 2002La Salle County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Jul 15, 2002, 1:50 PM CDT for La Salle 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
Jul 15, 2002, 1:50 PM CDT (18:50 UTC)
Expired
Jul 15, 2002, 4:45 PM CDT
In force
3 hr
Issued by
NWS Corpus Christi, TX
Area
Counties, with a storm outline in the text

County La Salle County, TX

The radar

The Laughlin AFB radar (KDFX), 134 km from the middle of the area, began a volume at 18:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

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

Del Rio, TX (KDRT), launched 12:00Z, 6.8 hours before the alert went out and 183 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, Del Rio, TX at 12:00Z on 2002-07-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 401 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, Del Rio, TX at 12:00Z on 2002-07-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -36 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
401 J/kg
Mixed-layer CIN
-34 J/kg
Mixed-layer LCL
605 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-36 m²/s²
0-3 km storm-relative helicity
41 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KCRP 151850
FFWCRP
TXC283-152145-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
146 PM CDT MON JUL 15 2002

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LA SALLE COUNTY IN TEXAS

* UNTIL 445 PM CDT

* AT 142 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  AN AREA OF SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAIN     
  WESTERN LA SALLE COUNTY.  THIS AREA WAS MOVING EAST AT 20 MPH.

ADDITIONAL RAINFALL AMOUNTS OF UP TO 2 INCHES ARE EXPECTED OVER SOME 
AREAS.  THIS WILL ADD TO THE SEVERAL INCHES OF RAIN ALREADY OBTAINED 
IN SPOTS.  

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

LAT...LON 2854 9945 2843 9931 2814 9913 2855 9891
          2852 9939

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 Jul 15, 10:25 AM CDT, 3 hours 25 minutes earlier.

Area forecast discussion, Jul 15, 10:25 AM CDT, 3 hours 25 minutes before
COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1025 AM CDT MON JUL 15 2002

UPPER TROF AXIS/VORT MAX OVER MEX/W CWA NEARLY STATIONARY. SFC
BOUNDARY HAS MOVED JUST OFFSHORE RIGHT ALONG THE COASTLINE. THIS
BDRY IS FCST TO DISSIPATE BY AFTERNOON WITH GENERALLY A SE FLOW
ACROSS THE AREA. ALTHOUGH BDRIES HAVE RESULTED IN VARIABLE WIND
DIR...PREVAILING WIND THIS AFTERNOON IS EXPECTED TO BE SE...THUS
WILL LEAVE WIND FCST ALONE FOR NOW. 12Z CRP SOUNDING HAD A FEW
PROBLEMS AND FEEL PWAT OF 1.85 INCHES IS TOO LOW. BRO 12Z SOUNDING
IS MORE REPRESENTATIVE WITH 2.2 INCHES. MODELS SHOW ADDITIONAL 2+
INCH PWATS MOVG IN FROM THE S. WV SATELLITE SHOWS ADDITIONAL GULF
MOISTURE MOVG UP FROM THE SRN GULF WHICH WILL AFFECT THE CWA TONIGHT
AND TUE. CURRENT FCST HAS A GOOD HANDLE ON THE HVY RAINFALL/FLOOD
THREAT. MAY MAKE MINOR ADJUSTMENTS TO HIGHS AFTER FURTHER
MONITERING. OTHERWISE NO MAJOR CHANGES TO ZONES ATTM.

MARINE...MESO-SCALE BOUNDARIES PLAYING HAVOC WITH WINDS IN MARINE
AREAS THIS MORNING...HOWEVER EXPECT SCEC CONDITIONS TO PREDOMINATE
THIS AFTN AS SELY FLOW RESUMES. WILL WORD CWF ACCORDINGLY. LOOKING
FARTHER OFFSHORE...A LARGE AREA OF TROPICAL MOISTURE WAS MOVING
NORTHWEST AT 25 KNOTS. EXPECT THIS ACTIVITY TO MOVE INTO OUR CWFA
THIS EVENING.

TE...81 SYNOPTIC
JM...75 MESO/MARINE

.CRP...FLASH FLOOD WATCH FOR TXZ229>234-239>247 THROUGH TUE.

In the hours before

Local storm report, Jul 15, 10:35 AM CDT, 3 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
1035 AM CDT MON JUL 15 2002

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

1025 AM    COTULLA                   TX   FLOOD
07/15/02   LASALLE                        SEVERAL STREETS HAVE BEEN
                                          REPORTED FLOODED IN
                                          COTULLA.                              LIVE OAK COUNTY.

1030 AM    TILDEN                    TX   FLOOD
07/15/02   MCMULLEN                       SEVERAL STREETS HAVE BEEN
                                          REPORTED FLOODED IN
                                          TILDEN.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 9:22 PM CDTFlash Flood WarningCRPMcMullen113 min
Jul 14, 11:14 PM CDTFlash Flood WarningCRPMcMullen2 hr
Jul 15, 1:04 AM CDTSevere Thunderstorm WarningCRPLive Oak41 min
Jul 15, 1:04 AM CDTSevere Thunderstorm WarningCRPJim Wells, Nueces21 days
Jul 15, 1:15 AM CDTTornado WarningCRPLive Oak45 min
Jul 15, 1:24 AM CDTFlash Flood WarningCRPLive Oak, McMullen3 hr
Jul 15, 3:33 AM CDTFlash Flood WarningCRPBee, Live Oak3 hr
Jul 15, 3:57 AM CDTFlash Flood WarningCRPDuval, Jim Wells, Webb3 hr
Jul 15, 4:20 AM CDTFlash Flood WarningCRPMcMullen115 min
Jul 15, 6:00 AM CDTFlash Flood WarningCRPVictoria3 hr
Jul 15, 6:31 AM CDTFlash Flood WarningCRPLive Oak3 hr
Jul 15, 6:47 AM CDTFlash Flood WarningCRPDuval, Webb3 hr
Jul 15, 9:48 AM CDTFlash Flood WarningCRPLa Salle, McMullen3 hr
Jul 15, 1:10 PM CDTSpecial Marine WarningCRP2 hr
Jul 15, 1:10 PM CDTSpecial Marine WarningCRP2 hr
Jul 15, 3:52 PM CDTFlash Flood WarningCRPDuval3 hr
Jul 15, 4:57 PM CDTFlash Flood WarningCRPMcMullen3 hr

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; radar from the NEXRAD Level II archive.