Alert archive / Texas / Flash Flood Warnings in 2001
Flash Flood Warning 22, NWS Brownsville, TX
NWS Brownsville, TX issued this flash flood warning at Sep 9, 2001, 9:33 PM CDT for Cameron County, Hidalgo County, Willacy County, Texas. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Sep 9, 2001, 9:33 PM CDT (02:33 UTC)
- Expired
- Sep 10, 2001, 12:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Brownsville, TX
- Area
- Whole counties
Counties Cameron County, TX, Hidalgo County, TX, Willacy County, TX
The radar
The Brownsville radar (KBRO), 57 km from the middle of the area, began a volume at 02:36 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 9, 10:00 PM CDT | Flash Flood | Harlingen, TX | Widespread street flooding was reported around Harlingen by an off-duty NWS forecaster. The most significant flooding was occurring along portions of U.S. Highway 77 and associated access roads. |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
The nearest sounding before it
Brownsville Intl, TX (KBRO), launched 00:00Z, 2.6 hours before the alert went out and 60 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.
- Mixed-layer CAPE
- 3648 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 767 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- -9 m²/s²
- 0-3 km storm-relative helicity
- 6 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KBRO 100239 FFWBRO TXC061-215-489-100530- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE BROWNSVILLE TX 933 PM CDT SUN SEP 9 2001 THE NATIONAL WEATHER SERVICE HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN WILLACY COUNTY IN DEEP SOUTH TEXAS EASTERN HIDALGO COUNTY IN DEEP SOUTH TEXAS NORTHERN CAMERON COUNTY IN DEEP SOUTH TEXAS * UNTIL 1230 AM CDT * AT 931 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAINFALL IN AN EAST-WEST LINE OVER MOST OF NORTHERN CAMERON COUNTY...MOVING SLOWLY NORTHWEST. RAINFALL RATES OF 2 TO 3 INCHES AN HOUR HAVE BEEN OBSERVED BY RADAR...AND SOME OF THIS HEAVY RAIN WILL BE MOVING INTO AREAS THAT RECEIVED HEAVY RAINS LATE THIS AFTERNOON AND EVENING. * 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...HARLINGEN...LA FERIA...SAN BENITO...SANTA ROSA... MONTE ALTO...COMBES AND RIO HONDO. 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. $$ NEWMAN
The office that day
Everything else NWS Brownsville, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 10, 7:42 AM CDT | Severe Thunderstorm Warning | BRO | Cameron | 48 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.