Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 9, NWS San Angelo, TX

May 4, 2002Tom Green County, Texas

NWS San Angelo, TX issued this flash flood warning at May 4, 2002, 7:35 PM CDT for Tom Green County, Texas. It was in force for 115 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: May 4, 2002, 7:35 PM CDT (00:35 UTC)
Expired: May 4, 2002, 9:30 PM CDT
In force: 115 min
Issued by: NWS San Angelo, TX
Area: Counties, with a storm outline in the text

County Tom Green County, TX

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 0.6 hours before the alert went out and 176 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: 806 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 2597 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 78 m²/s²
0-3 km storm-relative helicity: 145 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.4

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 050035
FFWSJT
TXC451-050230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
733 PM CDT SAT MAY 4 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  TOM GREEN COUNTY IN SOUTHWEST TEXAS

* UNTIL 930 PM CDT

* AT 730 PM CDT...WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER  
  OF THUNDERSTORMS WITH TORRENTIAL RAIN OVER SAN ANGELO...MOVING     
  SLOWLY NORTHEAST AT 15 MPH. 

* RAINFALL AMOUNTS OF 1.5 TO 2 INCHES HAVE ALREADY FALLEN SINCE 
  645 PM...AND AN ADDITIONAL 1.5 TO 2 INCHES IS LIKELY THROUGH 830   
  PM. 

* AMATUER RADIO OPERATORS AND OTHER REPORTS INDICATE SIGNIFICANT     
  STREET FLOODING OCCURRING IN SAN ANGELO.  THE ADDITIONAL HEAVY     
  RAIN WILL AGGRAVATE THE FLASH FLOOD SITUATION. 

THIS IS A VERY DANGEROUS SITUATION...AND TRAVEL SHOULD BE AVOIDED IN 
SAN ANGELO UNTIL THE RAIN SUBSIDES AND THE FLOODWATERS SUBSIDE. 
DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THE WATER DEPTH
MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. DO NOT ATTEMPT TO
DRIVE AROUND BARRICADES. MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES.

LAT...LON 3154 10065 3118 10061 3118 10016 3150 10021
          3166 10036

1 follow-up statement

000 
WGUS74 KSJT 050106
FFSSJT
TXC451-050230-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
803 PM CDT SAT MAY 4 2002

...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR TOM GREEN COUNTY 
UNTIL 930 PM CDT...

AT 800 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER 
OF THUNDERSTORMS OVER EASTERN TOM GREEN COUNTY...MOVING EAST AT 15 
MPH.

RAINFALL TOTALS OF 2 TO 2.5 INCHES HAVE OCCURRED IN THE SAN ANGELO 
AREA...AND OVER CENTRAL AND EASTERN TOM GREEN COUNTY. THE STORMS 
WILL EXIT TOM GREEN COUNTY BY 830 PM. 

ALTHOUGH THE RAIN HAS ENDED IN THE SAN ANGELO AREA...SIGNIFICANT 
FLASH FLOODING HAS BEEN REPORTED. MANY STREETS ARE FLOODED AND 
IMPASSIBLE. THIS IS A DANGEROUS SITUATION. TRAVEL SHOULD BE AVOIDED 
UNTIL THE FLOODWATERS SUBSIDE. 

DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THE WATER DEPTH 
MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. DO NOT ATTEMPT TO
DRIVE AROUND BARRICADES. MOST FLASH FLOOD DEATHS OCCUR IN VEHICLES.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 7:40 PM CDT	Severe Thunderstorm Warning	SJT	Runnels	65 min
May 4, 7:49 PM CDT	Severe Thunderstorm Warning	SJT	Concho	71 min
May 4, 8:05 PM CDT	Tornado Warning	SJT	Concho	70 min
May 4, 8:10 PM CDT	Tornado Warning	SJT	Tom Green	20 min
May 4, 8:14 PM CDT	Severe Thunderstorm Warning	SJT	Taylor	61 min
May 4, 8:28 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	47 min
May 4, 8:30 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	45 min
May 4, 8:34 PM CDT	Tornado Warning	SJT	Fisher	41 min
May 4, 8:57 PM CDT	Flash Flood Warning	SJT	Concho	3 hr
May 4, 8:57 PM CDT	Flash Flood Warning	SJT	Concho	63 min
May 4, 9:03 PM CDT	Tornado Warning	SJT	McCulloch	72 min
May 4, 9:15 PM CDT	Tornado Warning	SJT	Fisher	35 min
May 4, 9:15 PM CDT	Tornado Warning	SJT	Concho	60 min
May 4, 9:16 PM CDT	Tornado Warning	SJT	Fisher	34 min
May 4, 9:27 PM CDT	Tornado Warning	SJT	Jones	73 min
May 4, 9:41 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	49 min
May 4, 9:53 PM CDT	Flash Flood Warning	SJT	McCulloch	3 hr
May 4, 10:13 PM CDT	Severe Thunderstorm Warning	SJT	San Saba	62 min
May 4, 10:17 PM CDT	Tornado Warning	SJT	McCulloch	43 min
May 4, 10:25 PM CDT	Severe Thunderstorm Warning	SJT	Fisher	65 min
May 4, 10:33 PM CDT	Tornado Warning	SJT	San Saba	57 min
May 4, 10:42 PM CDT	Tornado Warning	SJT	Fisher, Nolan	63 min
May 4, 11:03 PM CDT	Severe Thunderstorm Warning	SJT	Shackelford	42 min
May 4, 11:29 PM CDT	Tornado Warning	SJT	San Saba	31 min
May 4, 11:46 PM CDT	Severe Thunderstorm Warning	SJT	Taylor	74 min
May 4, 11:47 PM CDT	Severe Thunderstorm Warning	SJT	Nolan	28 min
May 4, 11:57 PM CDT	Tornado Warning	SJT	Nolan	63 min
May 5, 12:57 AM CDT	Tornado Warning	SJT	Nolan, Taylor	63 min
May 5, 1:46 AM CDT	Severe Thunderstorm Warning	SJT	Runnels	44 min
May 5, 1:57 AM CDT	Severe Thunderstorm Warning	SJT	Taylor	33 min
May 5, 2:45 AM CDT	Tornado Warning	SJT	Callahan	45 min

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.