Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 31, NWS Brownsville, TX

September 19, 2002Willacy County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 19, 2002, 10:38 PM CDT for Willacy County, Texas. It was in force for 112 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: Sep 19, 2002, 10:38 PM CDT (03:38 UTC)
Expired: Sep 20, 2002, 12:30 AM CDT
In force: 112 min
Issued by: NWS Brownsville, TX
Area: Counties, with a storm outline in the text

County Willacy County, TX

The radar

The Brownsville radar (KBRO), 65 km from the middle of the area, began a volume at 03:42 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

Brownsville Intl, TX (KBRO), launched 00:00Z, 3.6 hours before the alert went out and 67 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: 3866 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 664 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 73 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KBRO 200338
FFWBRO
TXC489-200530-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
1036 PM CDT THU SEP 19 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WILLACY COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 1230 AM CDT

* AT 1030 PM CDT...THE PUBLIC REPORTED THUNDERSTORMS WITH VERY HEAVY
  RAINFALL NEAR LYFORD...OR NEAR RAYMONDVILLE...MOVING SOUTHEAST     
  AT 15 MPH. 

* SLOW MOVING THUNDERSTORMS ARE PRODUCING TORRENTIAL RAINFALL IN THE
  WARNED AREA. RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH
  FLOODING TO OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLASH
  FLOODING INCLUDE...RAYMONDVILLE.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH 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.

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE.

LAT...LON 2647 9784 2635 9773 2640 9749 2652 9756

65

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 19, 10:41 PM CDT	Special Marine Warning	BRO		3 hr
Sep 19, 10:52 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Hidalgo	68 min
Sep 19, 11:23 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Willacy	37 min
Sep 19, 11:26 PM CDT	Severe Thunderstorm Warning	BRO	Cameron, Willacy	64 min
Sep 19, 11:56 PM CDT	Severe Thunderstorm Warning	BRO	Cameron	30 days

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.