Alert archive / Texas / Flash Flood Warnings in 2000

Flash Flood Warning 5, NWS Corpus Christi, TX

July 27, 2000Jim Wells County, Nueces County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Jul 27, 2000, 5:15 PM CDT for Jim Wells County, Nueces County, Texas. It was in force for 75 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 27, 2000, 5:15 PM CDT (22:15 UTC)
Expired: Jul 27, 2000, 6:30 PM CDT
In force: 75 min
Issued by: NWS Corpus Christi, TX
Area: Whole counties

Counties Jim Wells County, TX, Nueces County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.3 hours before the alert went out and 46 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: 2895 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 86 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.7

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KCRP 272217
FFWCRP
TXC249-355-272330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
515 PM CDT THU JUL 27 2000

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN JIM WELLS COUNTY IN TEXAS
  NORTHWESTERN NUECES COUNTY IN TEXAS

* UNTIL 630 PM CDT

* AT 515 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN 7 MILES SOUTH OF SANDIA...OR ABOUT 13 MILES SOUTH
  OF MATHIS.  THE AREA OF HEAVY RAIN WAS NEARLY STATIONARY.

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.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

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 27, 2:25 PM CDT, 2 hours 50 minutes earlier.

Area forecast discussion, Jul 27, 2:25 PM CDT, 2 hours 50 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
225 PM CDT THU JUL 27 2000

SYNOPSIS: A WEAK COLD FRONT WILL SAG SOUTHEAST ACROSS TX WHILE A SFC
ANTICYCLONE PERSISTS OVER THE GLFMEX THRU THE PERIOD. THE GLFMEX
500HPA TROF AXIS WILL SLOWLY RETROGRADE THRU THE PERIOD.

PRECIPITATION: GLFMEX 500HPA TROF AXIS CURRENTLY DEPICTED BEST BY
THE AVN AND WILL ACCEPT ITS SOLUTION OF BRINGING IT ASHORE FRIDAY
AFTERNOON. TROPOSPHERIC FLOW WILL THEN BECOME ONSHORE THROUGH A
DEEPER LAYER. VORTMAX CURRENTLY NEAR HGX COASTLINE DEPICTED BEST BY
AVN AND WILL BE SOUTH OF CRP CWA FRIDAY. BELIEVE THAT THE
ANTICYCLONIC VORTICITY ADVECTION BEHIND THIS FEATURE IS THE REASON
THE MODEL PWATS DO NOT INCREASE SIGNIFICANTLY FRIDAY. ANOTHER
UPSTREAM VORTMAX ALONG THE MO/AR BORDER IS DAMPENED BY THE MODELS
AND THIS IS REASONABLE GIVEN CURRENT WATER VAPOR IMAGES AND EVOLVING
500HPA FLOW. EVEN THOUGH BOUNDARY LAYER MOISTURE/FORCING IS MARGINAL
ON FRIDAY WILL RETAIN A DE-EMPHASIZED <20 POP.

THE DEEPER ONSHORE TROPOSPHERIC FLOW WILL RESULT IN MORE RESPECTABLE
PWATS ON SATURDAY. BOUNDARY LAYER MOISTURE/FORCING IS STILL MARGINAL
BUT SOME UPPER LEVEL DIFFLUENCE AND THE NEARNESS OF A 500HPA
DEFORMATION ZONE MAY PARTIALLY OFFSET THIS. ACCEPT THE IDEA THAT
SATURDAY WILL BE THE BETTER DAY FOR CONVECTION BUT WILL CARRY NO
GREATER THAN A 20 POP.

CLOUDS: CROSS-SECTIONS GENERALLY SUGGEST PARTLY CLOUDY SKIES THRU
THE PERIOD WITH SOME MINOR VARIATIONS ON THAT THEME.

WIND: PGRAD/THERMAL LOW/DIURNAL EFFECTS WILL ALLOW FOR WINDS TO
INCREASE TO 15-20 MPH AND GUSTY DURING THE LATE AFTERNOON/EVENING
HOURS OVER MOST LOCALES.

TEMPERATURES: A SLIGHT DECREASE IN 850HPA TEMPERATURES AND
1000-850HPA THICKNESSES WILL NOT HAVE A PROFOUND EFFECT UPON SFC
TEMPERATURES. ALTHOUGH MODELS ADVERTISE A RATHER DRY COLUMN TONIGHT
THE 1000HPA LAPSE RATES REMAIN UNSTABLE AND SUGGEST GUIDANCE
TEMPERATURES ARE A TAD TOO COOL. WILL CONTINUE TO ABOVE GUIDANCE
MAXES AS VERY DRY SOIL IS MAKING A SIGNIFICANT IMPACT.

EXTENDED: OUTFLOW BOUNDARIES FROM CONVECTION INITIATED BY WEAK COLD
FRONT TO THE NORTH MAY AFFECT CRP CWA(ESPECIALLY NE PORTION) BUT
WILL CONTINUE TO EXCLUDE POPS ATTM SINCE MESOSCALE PHENOMENA CAN
CHANGE DRAMATICALLY FROM DAY-TO-DAY.

MARINE...WEAK TO MODERATE ONSHORE FLOW WILL PREVAIL THROUGH FRIDAY
NIGHT AS HIGH PRESSURE DOMINATES THE GULF. AN UPR TROF WILL MOVE
STEADILY INLAND THROUGH SATURDAY BRINGING INCREASING SHOWERS TO THE
COASTAL WATERS.  WINDS INCREASE A NOTCH TO SCEC CRITERIA FOR SAT AND
SUN IN THE WAKE OF THE TROF. THE CHANCE FOR SHOWERS AND TSRA WILL
LINGER INTO SATURDAY AS A DEEP SLY FLOW BRINGS A LITTLE MORE TPCL
MOISTURE INTO THE TX COASTAL WATERS.

PRELIMINARY NUMBERS:
CRP BB 075/098 075/096 075 8501-
VCT BB 074/098 074/096 074 85010
LRD BB 077/100 077/100 077 85010

.CRP...NONE.

(SYN)...85/BB
(MESO)...75/JM

In the hours before

Local storm report, Jul 27, 4:49 PM CDT, 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
449 PM CDT THU JUL 27 2000

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

0445 PM    5 W GOLIAD                TX   1.75 INCH HAIL
07/27/00   GOLIAD                         GOLFBALL SIZED HAIL
                                          REPORTED BY LOCAL SHERIFF
                                          OFFICE.

0445 PM    5 W GOLIAD                TX   WIND DAMAGE
07/27/00   GOLIAD                         TSTM WIND GUST DOWNED CP&L
                                          POWER POLE ALONG
                                          FM239.

BML

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 27, 4:21 PM CDT	Severe Thunderstorm Warning	CRP	Goliad	39 min

Nearby

Flash Flood Warnings in Texas, 2000 Every flash flood warning in 2000

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.