Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 21, NWS Brownsville, TX

September 9, 2001Hidalgo County, Kenedy County, Willacy County, Texas

NWS Brownsville, TX issued this flash flood warning at Sep 9, 2001, 6:11 PM CDT for Hidalgo County, Kenedy County, Willacy 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 the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Sep 9, 2001, 6:11 PM CDT (23:11 UTC)
Expired
Sep 9, 2001, 9:15 PM CDT
In force
3 hr
Issued by
NWS Brownsville, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Hidalgo County, TX, Kenedy County, TX, Willacy County, TX

The radar

The Brownsville radar (KBRO), 90 km from the middle of the area, began a volume at 23:18 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 12:00Z, 11.2 hours before the alert went out and 93 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, Brownsville Intl, TX at 12:00Z on 2001-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2923 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, Brownsville Intl, TX at 12:00Z on 2001-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 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
2923 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
654 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
23 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 KBRO 092315
FFWBRO
TXC215-261-489-100215-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE BROWNSVILLE TX
611 PM CDT SUN SEP 9 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KENEDY COUNTY IN DEEP SOUTH TEXAS
  WESTERN WILLACY COUNTY IN DEEP SOUTH TEXAS
  HIDALGO COUNTY IN DEEP SOUTH TEXAS

* UNTIL 915 PM CDT

* AT 555 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WITH VERY HEAVY RAINFALL 7 MILES WEST OF
  EDINBURG...IN ADDITION TO 10 MILES NORTHWEST OF RAYMONDVILLE...AND
  ALONG HIGHWAY 77 IN SOUTH KENEDY COUNTY.

* 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 COULD EXPERIENCE FLASH
  FLOODING INCLUDE...EDINBURG...MCALLEN...MISSION...PHARR...SAN JUAN
  AND PALMVIEW.

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.

LAT...LON 2619 9847 2602 9813 2636 9788 2650 9769
          2664 9763 2718 9753 2703 9795 2676 9798
          2639 9841

MILLER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 3:01 PM CDTFlash Flood WarningBROKenedy3 hr
Sep 9, 3:01 PM CDTFlash Flood WarningBROKenedy3 hr
Sep 9, 3:22 PM CDTSevere Thunderstorm WarningBROKenedy38 min
Sep 9, 3:58 PM CDTSevere Thunderstorm WarningBROBrooks, Hidalgo, Kenedy, Willacy62 min
Sep 9, 4:16 PM CDTTornado WarningBROWillacy44 min
Sep 9, 4:25 PM CDTTornado WarningBROKenedy65 min
Sep 9, 5:00 PM CDTTornado WarningBROCameron, Hidalgo, Willacy60 min
Sep 9, 5:41 PM CDTFlash Flood WarningBROKenedy, Willacy3 hr
Sep 9, 6:16 PM CDTTornado WarningBROCameron29 min
Sep 9, 6:50 PM CDTTornado WarningBROCameron40 min

Nearby

Flash Flood Warnings in Texas, 2001Every flash flood warning in 2001

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.