Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 8, NWS Corpus Christi, TX

July 1, 2002La Salle County, Live Oak County, McMullen County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Jul 1, 2002, 3:52 PM CDT for La Salle County, Live Oak County, McMullen 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 1, 2002, 3:52 PM CDT (20:52 UTC)
Expired: Jul 1, 2002, 6:45 PM CDT
In force: 3 hr
Issued by: NWS Corpus Christi, TX
Area: Counties, with a storm outline in the text

Counties La Salle County, TX, Live Oak County, TX, McMullen County, TX

The radar

The Corpus Christi radar (KCRP), 115 km from the middle of the area, began a volume at 20:53 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

Corpus Christi, TX (KCRP), launched 12:00Z, 8.9 hours before the alert went out and 133 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: 1883 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 757 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 138 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 012052
FFWCRP
TXC283-297-311-012345-

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

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  LA SALLE COUNTY IN TEXAS
  LIVE OAK COUNTY IN TEXAS
  MCMULLEN COUNTY IN TEXAS

* UNTIL 645 PM CDT

* AT 341 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN ACROSS CENTRAL LA SALLE COUNTY AND MOST OF MCMULLEN
  AND LIVE OAK COUNTIES...MOVING NORTH AT 20 MPH.

EXCESSIVE RUNOFF FROM THESE STORMS...ACROSS ALREADY SATURATED GROUND...
WILL CAUSE ADDITIONAL 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.

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.

LAT...LON 2854 9805 2841 9931 2806 9926 2812 9786

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, 3:05 PM CDT, 47 minutes earlier.

Area forecast discussion, Jul 1, 3:05 PM CDT, 47 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
305 PM CDT MON JUL 1 2002

MODELS BEGINNING TO COMPLEMENT THEMSELVES THIS RUN.  WILL TAKE A
BLEND OF THE AVN/ETA FOR SYNOPTIC FEATURE PLACEMENT...BUT LIKE THE
MESO-ETA FOR GETTING TIMING AND LOCATION OF CONVECTION.  UPR LOW
CURRENTLY MEANDERING AROUND THE HILL COUNTRY WILL BEGIN TO DRIFT
BACK TO THE WEST.

MESO-ETA SHOWING A VORT MAX ROTATING AROUND THE BACKSIDE OF THE LOW
LATE TONIGHT AND AFFECTING THE W CWA.  OMEGA/MOISTURE CONV FIELDS
LOOK GOOD FOR MORE RAIN OVER THE FA TONIGHT.  EXPECT A STREAM OF
SHRA/TSRA TO CONTINUE TO MOVE THROUGH THE EASTERN HALF OF THE REGION
ALONG THE LLJ INTO THE DEEPER CONVECTION OVER THE HILL COUNTY.
TRAINING ECHOS MAY CREATE A FLOOD RISK HERE.  OVER THE W FA SLOW
MOVING SHORTWAVE WILL CREATE THE POTENTIAL FOR VERY HEAVY RAIN AGAIN
LATE TONIGHT.  WILL KEEP FFA GOING FOR THESE REASONS TONIGHT.

VORT MAX SHD SHIFT SLOWLY EAST AND RAIN COVERAGE TOMORROW WILL
EXPAND FARTHER SE.  AS THE UPR LOW DROPS BACK TO THE SW...BEST
CONVECTION WILL SHIFT TOWARDS LRD AREA.  ETA/AVN SHOWING PWATS
FALLING TO 1.5 OVER THE GULF BY 54 HRS.  THINK THIS IS TOO FAST AND
WILL KEEP CHC GOING OVER THE EAST FA FOR DIURNAL CONVECTION.

UPR HIGH NUDGES IN FOR THU/FRI AND DRY AIR PENETRATES THE REGION
FROM THE EAST.  DONT BUY INTO THE SPEED AND STRENGTH OF THE DRYING
YET...BUT WILL TREND POPS DOWN TO SLIGHT CHC THU/FRI/SAT...WITH NO
POPS IN CERTAIN INLAND AREAS.  EASTERLY WAVE ADVERTISED BY AVN/MRF
TO PASS THROUGH THE REGION BEGINNING SUN NIGHT.  WILL KEEP CURR POP
FCST GOING AND INTRODUCE MONDAY AS CHC IN THE NE...SLGT ELSEWHERE.

MARINE...OVERALL PATTERN WILL REMAIN UNCHANGED NEXT COUPLE OF
DAYS...WITH SFC LOW PRESS TO THE W AND HIGH PRESS OVER NE GULF OF
MEX. WINDS OVER THE BAYS WILL DROP BELOW SCEC TONIGHT...INCREASING
AGAIN TUE AFTERNOON. WILL KEEP PERIODICAL SCEC CONDITIONS OVER THE
BAYS...WITH PREVAILING SCEC OFFSHORE THROUGH THE WEEK. GRADIENT
RELAXES BY FRI AS UPPER LEV HIGH PRESS BLDS ACROSS THE REGION. RAIN
CHANCES ALSO DIMINISH THROUGH THE WEEK.

PRELIMS...
CRP TE 077/088 077/090 075 926534
VCT TE 077/087 076/090 075 925734
LRD TT 074/087 074/088 076 928655

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

92..TR/SYN
80..TE/MESO
72..AP/RADAR
TD...HYDRO

In the hours before

Local storm report, Jul 1, 11:22 AM CDT, 4 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI,TX
1122 AM CDT MON JUL 1 2002

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

1030 AM    6 N MILLETT               TX   FLOOD
07/01/02   LA SALLE                       INTERSTATE 35 CLOSED
                                          AT FRIO COUNTY LINE

1030 AM    12 SW GEORGE WEST         TX   FLOOD
07/01/02   LIVE OAK                       US 59 CLOSED FROM
                                          12SW GEORGE WEST TO FM
                                          624

1030 AM    5 N THREE RIVERS          TX   FLOOD
07/01/02   LIVE OAK                       INTERSTATE 37 AND US
                                          281..INTERSTATE IS
                                          OPEN.

PURPURA

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, 4:56 AM CDT	Flash Flood Warning	CRP	La Salle	2 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

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; radar from the NEXRAD Level II archive.