Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 5, NWS Corpus Christi, TX

July 1, 2002La Salle County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Jul 1, 2002, 4:56 AM CDT for La Salle County, Texas. It was in force for 2 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 1, 2002, 4:56 AM CDT (09:56 UTC)
Expired: Jul 1, 2002, 7:00 AM CDT
In force: 2 hr
Issued by: NWS Corpus Christi, TX
Area: Counties, with a storm outline in the text

County La Salle 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, 9.9 hours before the alert went out and 192 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: 2061 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 784 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 16 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 010956
FFWCRP
TXC283-011200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
453 AM CDT MON JUL 1 2002

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

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

* UNTIL 700 AM CDT

* AT 456 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN 6 MILES WEST OF LOS ANGELES...OR ABOUT 8 MILES EAST
  OF COTULLA...MOVING NORTH AT 5 MPH. RAINFALL RATES OF 2 TO 3       
  INCHES PER HOUR ARE EXPECTED WITH THIS SLOW MOVING STORM.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CIBOLO 
CREEK...NORTH OF LOS ANGELES...AND OTHER CREEKS AND STREAMS...AND 
DRY WASHES AROUND NORTHERN LASALLE COUNTY. LOW WATER CROSSINGS MAY 
FLOOD AS WELL. IF FLOODING IS OBSERVED IN YOUR AREA...MOVE TO HIGHER 
GROUND IMMEDIATELY.  DO NOT DRIVE INTO FLOODED ROADS

LAT...LON 2811 9938 2831 9884 2863 9882 2862 9938

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 1, 3:41 AM CDT, 1 hour 15 minutes earlier.

Area forecast discussion, Jul 1, 3:41 AM CDT, 1 hour 15 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
341 AM CDT MON JUL 1 2002

SHORT-TERM...ALL THE MODELS ARE GENERALLY IN GOOD AGREEMENT WITH
OVERALL SYNOPTIC-SCALE FEATURES...BUT WILL FOLLOW THE MESOETA FOR
TIMING DETAILS AS IT IS DEPICTING THE VORTICITY MAXIMA POSITIONS
BEST. MACROSCALE ASCENSION ASSOCIATED WITH A SERIES OF VORTICITY
MAXIMA AND 250HPA DIFFLUENCE WILL INTERACT WITH A TROPICAL
ENVIRONMENT(PWATS BEST PER MESOETA) ACROSS THE CWA THROUGH TUESDAY
NIGHT. CYCLONIC SHEAR AXIS AND CORE OF LOW-LEVEL JET ARE FOCUSED
ACROSS THE CENTRAL RIO GRANDE PLAINS THEN SHIFTS INTO THE WESTERN
RIO GRANDE PLAINS TUESDAY NIGHT. LIKELY/CHANCE POPS WILL BE USED
WITH THE EMPHASIS ACROSS THE RIO GRANDE PLAINS. WILL ISSUE A FLASH
FLOOD WATCH AS A SERIES OF CONVECTIVE EPISODES WILL EASILY BRING A
FLASH FLOOD THREAT...PARTICULARLY OVER THE RIO GRANDE PLAINS. MINOR
DEVIATIONS TO FWC/MAV TEMPERATURES EXCEPT A FEW DEGREES LOWER FOR
MAXES OVER THE RIO GRANDE PLAINS.

LONG-TERM...SUFFICIENTLY HIGH PWATS/WEAK SURFACE PRESSURE
GRADIENT/TROPICAL WAVES ARGUES CHANCE TO SLIGHT CHANCE POPS THROUGH
THE PERIOD. MEX TEMPERATURE GUIDANCE APPEARS ON TRACK.

MARINE...SCA IS NEEDED NEARSHORE THIS MORNING. THEN GRADIENT WILL BE
DRIVEN BY PGF/DIURNAL LOW IN MEXICO THROUGH THURSDAY. THEREFORE
EXPECT WINDS TO REACH SCEC IN THE BAYS DURING THE AFTN. HIGHER WINDS
WILL TRANSLATE INTO THE COASTAL WATERS TUE NGT AND WED AS WELL
FORCING SEAS FROM AN AVERAGE OF 4 FEET...UP TO 5 FEET. WILL MAINTAIN
SCT POPS AT NIGHT DUE TO DIURNAL SPEED CONVERGENCE SENARIO AND
RELATIVELY HIGH MOISTURE CONTENT. ISOLATED POPS DURING THE DAY.

PRELIMINARY NUMBERS:
CRP TT 088/077 088/077 090 56523
VCT TT 087/076 087/076 089 74734
LRD CT 088/074 087/074 089 45655

.CRP...FLASH FLOOD WATCH TXZ229>234-239>247 UNTIL 2130Z.
    ...SCA GMZ250-255.

85/75

In the hours before

Special weather statement, Jul 1, 1:22 AM CDT, 3 hours 34 minutes before

TXZ229>234-239>247-011000-

HEAVY RAINFALL OUTLOOK
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
122 AM CDT MON JUL 1 2002

...HEAVY RAINFALL LIKELY ACROSS THE CENTRAL RIO GRANDE PLAINS
OVERNIGHT...
...HEAVY RAINFALL POSSIBLE ELSEWHERE OVERNIGHT...

AN UPPER LEVEL LOW OVER MEXICO WILL CONTINUE TO TRANSPORT ABUNDANT
TROPICAL MOISTURE ACROSS SOUTH TEXAS OVERNIGHT. A SERIES OF UPPER
LEVEL DISTURBANCES TRAVERSING THE REGION WILL GENERATE SCATTERED TO
NUMEROUS SHOWERS AND THUNDERSTORMS.  DUE TO TORRENTIAL DOWNPOURS
WHICH ARE COMMONLY ASSOCIATED WITH TROPICAL SHOWERS AND
THUNDERSTORMS...THE POTENTIAL FOR HEAVY RAINFALL WILL CONTINUE TO
EXIST. AN ADDITIONAL 3 TO 6 INCHES WITH LOCALIZED AMOUNTS AS HIGH AS
10 INCHES ARE POSSIBLE ACROSS THE CENTRAL RIO GRANDE PLAINS. THIS
INCLUDES MCMULLEN...LIVE OAK...DUVAL AND JIM WELLS COUNTIES. AN
ADDITIONAL 1 TO 3 INCHES OF RAIN WITH LOCALLY HIGHER AMOUNTS IS
POSSIBLE OVERNIGHT ACROSS THE REMAINDER OF SOUTH TEXAS.

THE DRY WEATHER EXPERIENCED OVER THE PAST SEVERAL MONTHS HAS
RESULTED IN VERY DRY SOIL CONDITIONS. HOWEVER...OVER THE PAST FEW
DAYS...SEVERAL INCHES OF RAIN HAVE FALLEN IN A FEW
LOCATIONS. ALTHOUGH WIDESPREAD FLOODING IS NOT ANTICIPATED...A FLASH
FLOOD WATCH MAY BE REQUIRED TODAY. LOCALIZED FLASH FLOODING...OR
THE RAPID PONDING OF WATER ON ROADWAYS...RISES ON CREEKS AND
STREAMS...AND RUNOFF OVER FLAT TERRAIN...IS POSSIBLE. IF A FLASH
FLOOD WARNING IS ISSUED...SEEK HIGHER GROUND IMMEDIATELY.

STAY TUNED TO NOAA WEATHER RADIO FOR THE LATEST WEATHER INFORMATION.

FOR THE LATEST WEATHER FORECASTS AND WARNINGS...CHECK OUR WEB SITE AT
HTTP://WWW.SRH.NOAA.GOV/CRP

85

Local storm report, Jul 1, 2:23 AM CDT, 2 hours 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
223 AM CDT MON JUL 1 2002

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

0223 AM    5 N CLEGG                 TX   FLOOD
07/01/02   LIVE OAK                       HIGHWAY 59 CLOSED AT MILE
                                          MARKER 730 DUE TO
                                          FLOODING OF RAMIRENA
                                          CREEK.

JM

Local storm report, Jul 1, 3:50 AM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
350 AM CDT MON JUL 1 2002

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

0300 AM    FREER                     TX   FLOOD
07/01/02   DUVAL                          HIGHWAY 44 CLOSED IN FREER
                                          DUE TO FLOODING.

JM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 12:54 AM CDT	Flash Flood Warning	CRP	Duval, Jim Wells, Live Oak, McMullen	4 hr
Jul 1, 2:52 AM CDT	Flash Flood Warning	CRP	Bee	4 hr
Jul 1, 6:22 AM CDT	Flash Flood Warning	CRP	McMullen	113 min
Jul 1, 7:03 AM CDT	Flash Flood Warning	CRP	La Salle	117 min
Jul 1, 3:52 PM CDT	Flash Flood Warning	CRP	La Salle, Live Oak, McMullen	3 hr

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.