Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 87, NWS San Angelo, TX

March 19, 2002McCulloch County, Texas

NWS San Angelo, TX issued this flash flood warning at Mar 19, 2002, 5:00 PM CST for McCulloch 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 as issued.

The facts

Issued
Mar 19, 2002, 5:00 PM CST (23:00 UTC)
Expired
Mar 19, 2002, 8:00 PM CST
In force
3 hr
Issued by
NWS San Angelo, TX
Area
Counties, with a storm outline in the text

County McCulloch County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.0 hours before the alert went out and 251 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, Del Rio, TX at 12:00Z on 2002-03-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1251 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2002-03-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.1939587897117136Sfc1 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
1251 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
734 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
32 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KSJT 192301
FFWSJT
TXC307-200200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SAN ANGELO TX
500 PM CST TUE MAR 19 2002

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  MCCULLOCH COUNTY IN NORTH CENTRAL TEXAS

* UNTIL 800 PM CST

* AT 450 PM CST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY       
  HEAVY RAIN FROM LOHN TO BRADY TO VOCA...MOVING EAST AT 30 MPH.

* RAINFALL TOTALING 2 TO 3 INCHES WILL FALL QUICKLY BETWEEN 5 AND 6  
  PM ACROSS MUCH OF MCCULLOCH COUNTY. ADDITIONAL STORMS WILL         
  MOVE INTO MCCULLOCH COUNTY BETWEEN 6 AND 7 PM...PRODOCING AN       
  ADDITIONAL INCH OF RAIN. THIS RAIN WILL RUN OFF AND PRODUCE FLASH  
  FLOODING.

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 3143 9958 3098 9956 3096 9911 3143 9913

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS San Angelo, TX wrote its last area forecast discussion before this flash flood warning went out at Mar 19, 3:00 PM CST, 2 hours earlier.

Area forecast discussion, Mar 19, 3:00 PM CST, 2 hours before
WEST CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
300 PM CST TUE MAR 19 2002

.CURRENT...SURFACE LOW JUST SOUTH TEXAS AT THIS TIME. STATIONARY
BOUNDARY STILL LOCATED BETWEEN SAN ANGELO AND JUNCTION WITH SEVERE
CONVECTION FIRING STILL ALONG AND NORTH OF THIS BOUNDARY AS UPPER
LOW CONTINUES TO MOVE NORTHEAST FROM NEAR ELPASO. RADAR CONTIUES TO
SHOW CONVECTION FILLING IN TO THE WEST AND SOUTH. A COLD FRONT IS
ALSO WORKING IN FROM THE PANHANDLE AT THIS TIME.

.SHORT TERM...CONVECTION WILL CONTINUE ALONG AND EAST OF A ABILINE
TO SAN ANGELO LINE TONIGHT SLOWLY COMMING TO AN END BY MIDNIGHT.
HOWEVER AS UPPER-LOW COMES ACROSS...EXPECT WRAP AROUND SHOWERS TO
MOVE ACROSS BIG COUNTRY LATE TONIGHT. WITH CONVECTION EXPECTED TO
CONTINUE INTO THE EVENING AND CURRENT WARNINGS ON GOING WILL GO WITH
THE FLASH FLOOD WATCH FROM SONORA TO ABILENE.

.LONG TERM...SHOWERS ACROSS THE BIG COUTNRY WILL GRADUALLY DIMINISH
DURING THE MORNING HOURS WITH CLEARING TO FOLLOW. OTHERWISE BECOMING
CLEAR FOR THE REMAINDER OF THE WEEK WITH NEXT FRONT COMMING THROUGH
ABOUT FRIDAY.

.EXTENDED...THE MRF IS WEAKER AND SLOWER WITH THE SYSTEM EXPECTED
THE EARLY PART OF NEXT WEEK. PREVIOUS SHIFT TOOK THE SLIGHT CHANCE
OUT OF THE FORECAST AND LOOKING AT THE ECMWF...THIS LOOKS GOOD. ALSO
LOOKS TO BE A LITTLE WARMER THAN PREVIOUSLY THOUGHT AS WELL.

ABI 046/063/038/071 8000
SJT 044/064/039/073 8000
JCT 046/065/038/072 8000

.SJT...SEVERE THUNDERSTORM WATCH SOUTH OF A STERLING CITY TO COLEMAN
LINE TILL 6 PM.
FLASH FLOOD WATCH EAST OF A SONORA TO AILIENE LINE.

27/BRAZZELL

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 18, 8:50 PM CSTSevere Thunderstorm WarningSJTCrockett, Irion40 min
Mar 19, 3:43 AM CSTSevere Thunderstorm WarningSJTKimble32 min
Mar 19, 4:17 AM CSTSevere Thunderstorm WarningSJTMason, Menard28 min
Mar 19, 8:38 AM CSTSevere Thunderstorm WarningSJTCrockett52 min
Mar 19, 9:37 AM CSTSevere Thunderstorm WarningSJTSchleicher53 min
Mar 19, 12:16 PM CSTSevere Thunderstorm WarningSJTIrion29 min
Mar 19, 12:26 PM CSTSevere Thunderstorm WarningSJTTom Green34 min
Mar 19, 12:39 PM CSTSevere Thunderstorm WarningSJTIrion36 min
Mar 19, 1:04 PM CSTSevere Thunderstorm WarningSJTTom Green56 min
Mar 19, 1:20 PM CSTTornado WarningSJTTom Green40 min
Mar 19, 1:43 PM CSTFlash Flood WarningSJTTom Green92 min
Mar 19, 1:48 PM CSTTornado WarningSJTConcho, Runnels, Tom Green57 min
Mar 19, 2:25 PM CSTSevere Thunderstorm WarningSJTSutton35 min
Mar 19, 2:47 PM CSTTornado WarningSJTColeman, Runnels43 min
Mar 19, 3:14 PM CSTTornado WarningSJTMenard, Schleicher61 min
Mar 19, 4:18 PM CSTSevere Thunderstorm WarningSJTMcCulloch, Menard57 min
Mar 19, 4:37 PM CSTTornado WarningSJTMcCulloch53 min
Mar 19, 5:15 PM CSTSevere Thunderstorm WarningSJTSan Saba60 min
Mar 19, 5:29 PM CSTFlash Flood WarningSJTBrown, San Saba3 hr
Mar 19, 5:34 PM CSTTornado WarningSJTSan Saba41 min

Nearby

Flash Flood Warnings in Texas, 2002Every 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.