Alert archive / Texas / Flash Flood Warnings in 2011

Flash Flood Warning 3, NWS Brownsville, TX

October 1, 2011Jim Hogg County, Texas

NWS Brownsville, TX issued this flash flood warning at Oct 1, 2011, 5:45 PM CDT for Jim Hogg 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 outline as issued.

The facts

Issued
Oct 1, 2011, 5:45 PM CDT (22:45 UTC)
Expired
Oct 1, 2011, 7:00 PM CDT
In force
75 min
Issued by
NWS Brownsville, TX
Area
Storm-based polygon
Flood severity
None

County Jim Hogg County, TX

The radar

The Corpus Christi radar (KCRP), 157 km from the middle of the area, began a volume at 22:45 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, 10.8 hours before the alert went out and 167 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-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 2011-10-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1299 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2011-10-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
1299 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
838 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
5 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.

271 
WGUS54 KBRO 012245
FFWBRO
TXC247-020000-
/O.NEW.KBRO.FF.W.0003.111001T2245Z-111002T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
545 PM CDT SAT OCT 1 2011

THE NATIONAL WEATHER SERVICE IN BROWNSVILLE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL JIM HOGG COUNTY IN DEEP SOUTH TEXAS...

* UNTIL 700 PM CDT

* AT 541 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS INDICATED  
  TORRENTIAL RAIN OF 2 TO 3 INCHES PER HOUR FROM SLOW MOVING         
  THUNDERSTORMS WITH VERY HEAVY RAINFALL OVER SOUTH CENTRAL JIM HOGG 
  COUNTY. THESE HEAVY RAIN PRODUCING THUNDERSTORMS ARE NEARLY        
  STATIONARY AND MAY ALSO PRODUCE BRIEF WIND GUSTS FROM 20 TO 30 MPH 
  IN ADDITION TO FREQUENT LIGHTNING THROUGH 7 PM.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO   
  OCCUR MAINLY IN THE TOWNS OF CUEVITAS AND GUERRA IN JIM HOGG       
  COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THESE THUNDERSTORMS WILL CAUSE FLOODING OF 
SMALL ARROYOS AND STREAMS...AND SOME COUNTRY ROADS. FARMLAND ALONG 
STREAM BANKS WILL BE INUNDATED. IF CAUGHT IN A LOW LYING AREA...MOVE 
TO HIGHER GROUND.

LOW WATER CROSSINGS ARE POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT
ATTEMPT TO TRAVEL ACROSS FLOODED ROADS. FIND ALTERNATE ROUTES. IT
ONLY TAKES A FEW INCHES OF SWIFTLY FLOWING WATER TO CARRY VEHICLES
AWAY.

DON'T BECOME A STATISTIC. TURN AROUND...DON'T DROWN!

&&

LAT...LON 2691 9859 2679 9859 2679 9890 2690 9890

$$

SPEECE
1 follow-up statement
504 
WGUS74 KBRO 012352
FFSBRO

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BROWNSVILLE TX
652 PM CDT SAT OCT 1 2011

TXC247-020006-
/O.EXP.KBRO.FF.W.0003.000000T0000Z-111002T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JIM HOGG TX-
652 PM CDT SAT OCT 1 2011

...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR SOUTH CENTRAL JIM
HOGG COUNTY WILL BE ALLOWED TO EXPIRE AT 700 PM CDT...

THE HEAVY RAIN PRODUCING THUNDERSTORMS THAT WERE AFFECTING SOUTH 
CENTRAL JIM HOGG COUNTY OVER THE PAST HOUR HAVE WEAKENED 
SIGNIFICANTLY. ACCORDINGLY THE THREAT FOR FLASH FLOODING IS 
DIMINISHING.

IF FLOODING HAS BEEN OBSERVED...PLEASE REPORT IT TO YOUR LOCAL 
LAW ENFORCEMENT AGENCY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DON'T BECOME A STATISTIC. TURN AROUND...DON'T DROWN!

&&

LAT...LON 2691 9859 2679 9859 2679 9890 2690 9890

$$

SPEECE

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 1, 4:31 PM CDTAreal Flood AdvisoryBROStarr119 min
Oct 1, 5:03 PM CDTFlash Flood WarningBROStarr107 min

Nearby

Flash Flood Warnings in Texas, 2011Every flash flood warning in 2011

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.