Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 4, NWS Corpus Christi, TX

February 1, 1998Duval County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Feb 1, 1998, 1:43 PM CST for Duval 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 counties it named.

The facts

Issued: Feb 1, 1998, 1:43 PM CST (19:43 UTC)
Expired: Feb 1, 1998, 5:00 PM CST
In force: 3 hr
Issued by: NWS Corpus Christi, TX
Area: Whole counties

County Duval County, TX

The radar

The Corpus Christi radar (KCRP), 99 km from the middle of the area, began a volume at 19:43 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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 7.7 hours before the alert went out and 115 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: 673 J/kg
Mixed-layer CIN: -86 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 15 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 
TTAA00 KCRP 011943
FFWCRP
TXC131-012300-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
143 PM CST SUN FEB 1 1998
 
THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  500 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTY......
 
IN SOUTH CENTRAL TEXAS
 
   ...DUVAL COUNTY
 
AT 140 PM DOPPLER RADAR INDICATED A LARGE AREA OF SHOWERS AND
THUNDERSTORMS MOVING INTO DUVAL COUNTY. MOVEMENT OF THE
STORMS IS NORTHEAST AT 10 TO 15 MPH.  RADAR ESTIMATES INDICATE
THAT 1 TO 2 INCHES OF RAIN HAS ALREADY OCCURRED OVER THE COUNTY
IN THE LAST 3 HOURS.  ADDITIONAL RAINFALL OF 1 TO 3 INCHES IS
POSSIBLE THROUGH 5 PM...ESPECIALLY FROM HIGHWAY 2295 SOUTHWARD.
FLOODING OF LOW LYING AREAS...LOW WATER CROSSINGS AND ROADWAYS
IS LIKELY.
 
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...DI
PS...OR 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.

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 Feb 1, 9:30 AM CST, 4 hours 13 minutes earlier.

Area forecast discussion, Feb 1, 9:30 AM CST, 4 hours 13 minutes before

COASTAL BEND FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
930 AM CST SUN FEB 01 1998

...HAVE UPDATED ZONES TO INCLUDE A FLASH FLOOD WATCH FOR THE ENTIRE
CWA.  SLOW MOVING CONVECTION WILL MOVE ACROSS THE REGION.  STORMS ARE
NOW FIRING WEST OF LAREDO IN MX.  ADDITIONAL STORMS ARE DVLPG ACROSS
KLEBERG COUNTY WHICH SHOULD MV SLOWLY NWD ACROSS NUECES...SAN
PAT...LIVE OAK AND BEE BY EARLY AFTN AS THE WARM FNT LIFTS NWD.
SEE PRELIMS BELOW...

DENSE FOG IS LIFTING ACROSS THE CWA AS STG VERT LIFT MVS IN FROM MX.
DENSE FOG CAN BE REMOVED FROM ZONES ON THE UPDATE.  LOOKS LIKE WE
WILL HAVE ANOTHER ACTIVE DAY.  CONVECTION IS ALREADY FIRING OVER THE
NEAR SHORE WATERS AND OVER KENNEDY COUNTY SOUTH OF BAFFIN BAY.  STORM
MVMT IS NNE 15KTS.  ENVIRONMENT IS MORE UNSTABLE TDY.  THE EL IS 8KFT
HIGHER THAN YSTDY UP TO 33KFT...WHICH WILL SUPPORT TALLER STORMS.
CAPE IN BRO IS 2000 J/KG AND THIS INSTABILITY SHOULD ADVECT ACROSS
THE COASTAL PLAINS AS SFC BNDRY LIFTS NWD AND LOW PRES FORMS ACROSS
OUR WRN COUNTIES.  (BASED ON 00Z ETA MODEL).  WBZ IS LOW NR 7000FT
AND THERE IS A GOOD AMT OF DRY AIR IN MID LVLS THEREFORE
HAIL/DWNBURST WINDS ARE A GOOD POSSIBILITY.  LCLY HVY RAINS ALSO
LIKELY AS IMPRESSIVE UPPER LOW WITH GOOD CAA ALOFT MVS OVHD DURING
THE AFTN HOURS.

WILL INCREASE POPS FOR THE COASTAL PLAINS AND ADD CHC OF SVR.  REMOVE
DENSE FOG.  REMAINING PARAMETERS LOOK ON TRACK AT THE MOMENT.

FLASH FLOOD WATCfH ALL AREAS
.CRP...70% POPS SOME SVR.
.VCT...80% POPS SOME SVR.
.LRD...60% POPS SOME SVR.

JM...075

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 1, 9:15 AM CST	Severe Thunderstorm Warning	CRP	Kleberg	75 min
Feb 1, 10:26 AM CST	Flash Flood Warning	CRP	Kleberg	94 min
Feb 1, 11:02 AM CST	Severe Thunderstorm Warning	CRP	Webb	73 min
Feb 1, 12:02 PM CST	Flash Flood Warning	CRP	Webb	118 min
Feb 1, 2:25 PM CST	Flash Flood Warning	CRP	Jim Wells	3 hr
Feb 1, 2:40 PM CST	Flash Flood Warning	CRP	Kleberg	3 hr

Nearby

Flash Flood Warnings in Texas, 1998 Every flash flood warning in 1998

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.