Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 30, NWS Corpus Christi, TX

September 5, 2001La Salle County, Webb County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Sep 5, 2001, 6:31 PM CDT for La Salle 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Sep 5, 2001, 6:31 PM CDT (23:31 UTC)
Expired: Sep 5, 2001, 9:30 PM CDT
In force: 3 hr
Issued by: NWS Corpus Christi, TX
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties La Salle County, TX, Webb County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.5 hours before the alert went out and 208 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: 392 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 1047 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 121 m²/s²
0-3 km storm-relative helicity: 143 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KCRP 052332
FFWCRP
TXC283-479-060230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
631 PM CDT WED SEP 5 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN LA SALLE COUNTY IN TEXAS
  CENTRAL WEBB COUNTY IN TEXAS

* UNTIL 930 PM CDT

* AT 624 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN 13 MILES EAST OF LAS TIENDAS...OR ABOUT 27 MILES
  NORTH OF LAREDO...MOVING EAST AT 10 MPH.

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 2775 9975 2762 9951 2810 9897 2838 9947

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 5, 2:45 PM CDT, 3 hours 46 minutes earlier.

Area forecast discussion, Sep 5, 2:45 PM CDT, 3 hours 46 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
245 PM CDT WED SEP 5 2001

UPPER LOW OVER TX PROGD TO SLOWLY BE DRAWN NWD AND ABSORBED BY NEXT
UPPER LOW OVER PAC NW DIGGING SWD ACROSS THE SW U.S. AS A
RESULT...UPPER LEV DISTS WILL CONT ACROSS S TX.

WV SAT INDICATED DRY SLOT ROTATING ACROSS W FA WITH A 50-60 KNOT JET
DIGGING S ACROSS W TX. MODELS PROG PWATS TO INCREASE OVER W FA
OVERNIGHT. THE COMBINATION OF THE DIGGING JET OUT WEST...SFC MOIST
CONV MOVG INLAND AND THE INCREASING PWATS OUT WEST...SHOULD PRODUCE
AND MAINTAIN CONVECTION OVER RIO GRANDE PLAINS TONIGHT.  SATELLITE
AND LTG DATA INDICATED DEVELOPMENT OVER MEX W OF RIO GRANDE PLAINS.

PWATS ARE PROGD TO DECREASE OVER E FA OVERNIGHT. HOWEVER...WITH
CURRENT RADAR INDICATING TRAINING OVER NE FA...CONVECTION OFFSHORE
AND SE OF BRO MOVG NW...AND WITH VERY LOW FFG VALUES...AM INCLINED
TO KEEP FFA IN EFFECT FOR ALL ZONES TONIGHT. FFA MAY BE CANCELLED
LATER TONIGHT FOR COASTAL COUNTIES IF WARRANTED.

AS UPPER LOW BECOMES LESS OF AN INFLUENCE ON THU AND PWATS
DECREASE...FLOODING POTENTIAL ALSO DIMINISHES. SUFFICIENT MOISTURE
AND WEAKENING UPPER LEVEL LOW...WILL REMAIN IN PLACE TO WARRANT LOW
POPS WITH MAYBE SOME LOCALIZED FLOODING.

WITH LESS CLOUDS/RAIN ON THU AND FRI...MAX TEMPS WILL BE WARMER.
WINDS WILL INCREASE NEXT TWO DAYS AS SFC LOW DEEPENDS ACROSS THE
PLAINS.

ETA...AVN AND UKMET PROG AN UPPER LOW CURRENTLY OVER THE PAC NW TO
DIG S OVER THE SW U.S. AND INTO TX WITH AN ASSOC CF TO MOVE INTO N
TX BY LATE FRI. THE AVN BRINGS THIS FRONT THROUGH THE ENTIRE FA BY
SAT NIGHT/SUN MORN. THIS HIGHLY DEPENDS ON JUST HOW FAR S THE UPPER
LOW ACTUALLY DIGS. WILL NOT ENTIRELY JUMP ON THIS SCENARIO JUST YET
SO AS TO AVOID FLIP FLOPPING IF NEXT RUN IS NOT AS AGRESSIVE. WILL
ONLY GO WITH THE CF APPROACHING THE FA. THIS WILL FALL MORE IN LINE
WITH CURRENT EXTENDED AND MRF POPS IN THE 30-40 PERCENT RANGE
THROUGH WED.

MARINE...WEAKNESS IN THE UPPER RIDGE WILL CONTINUE.  H5 LOW
CURRENTLY OVER N TX IS FCST TO WEAKEN AND SLIDE NE.  THIS WILL ALLOW
SLIGHTLY DRIER AIR TO FILTER ACROSS THE REGION.  THERE WILL STILL BE
ENOUGH MOISTURE PRESENT TO MAINTAIN THE MENTION OF AT LEAST ISOLATED
CONVECTION.  RADAR THIS AFTERNOON HAS SHOWN AN INCREASE IN
CONVECTION OVER THE COASTAL WATERS.  SATELLITE PIX SHOW MOISTURE
CURRENTLY CROSSING THE YUCATAN AND ANOTHER AREA ALONG THE MEXICAN
COAST THAT COULD KEEP CHCS FOR PCPN HIGHER THAN FCST SHOWS.  WINDS
WILL BEGIN TO INCREASE AS PRESSURES LOWER ACROSS W TX.  HIGHEST
SPEEDS WILL BE NOTED OVER THE BAYS DURING THE AFTERNOON AND
EVENINGS..WITH OFFSHORE WATERS EXPERIENCING THE NOCTURNAL EFFECT AND
SEEING WINDS HIGHEST AT NIGHT.  EXTENDED IS THE BIGGEST PROBLEM THIS
AFTERNOON..WITH MODELS WANTING TO PUSH A COLD FRONT OFF THE TEXAS
COAST.  WILL AWAIT THE ARRIVAL OF ADDITIONAL DATA BEFORE CHANGING
THE CURRENT THINKING.  LATER SHIFTS WOULD NEED TO MAKE MAJOR CHANGES
IN THE EXTENDED IF THIS SOUTHWARD TREND CONTINUES.

.CRP...NONE.

PRELIMINARY NUMBERS:
CRP BB 076/092 077/093 077 42--
VCT BB 075/091 075/093 077 4211
LRD BB 076/096 078/099 078 521-

.CRP...FLASH FLOOD WATCH TXZ229>234-239>247 TONIGHT.
RIVER FLOOD WATCH TXZ229>234-243>247 THROUGH TONIGHT.

81/TE
73/MSL

In the hours before

Local storm report, Sep 5, 1:29 PM CDT, 5 hours 2 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
129 PM CDT WED SEP 5 2001

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

0115 PM    PORT LAVACA               TX   FLOOD
09/05/01   CALHOUN                        FARM TO MARKET ROAD 1090 AT 6
                                          MILE CREEK IS FLOODED.

0115 PM    PORT LAVACA               TX   FLOOD
09/05/01   CALHOUN                        THE INTERSECTION OF HOLLOWMAN
                                          AND MCDONALD ROADS IS FLOODED.

0115 PM    PORT LAVACA               TX   FLOOD
09/05/01   CALHOUN                        FARM TO MARKET ROAD 3084 AT
                                          AIRPORT IS FLOODED.

Local storm report, Sep 5, 3:31 PM CDT, 3 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
331 PM CDT WED SEP 5 2001

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

0300 PM    MCFADDIN                  TX   FLOOD
09/05/01   VICTORIA                       OLD REFUGIO ROAD FLOODED

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 5, 12:11 PM CDT	Flash Flood Warning	CRP	Calhoun, Goliad, Victoria	3 hr
Sep 5, 1:55 PM CDT	Flash Flood Warning	CRP	Calhoun, Goliad, Victoria	80 min

Nearby

Flash Flood Warnings in Texas, 2001 Every flash flood warning in 2001

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.