Alert archive / Texas / Flash Flood Warnings in 2008
Flash Flood Warning 22, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 14, 2008, 11:00 AM CDT for Lavaca County, Texas. It was in force for 52 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 14, 2008, 11:00 AM CDT (16:00 UTC)
- Expired
- Sep 14, 2008, 11:52 AM CDT
- In force
- 52 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Lavaca County, TX
The radar
The Austin/San Antonio radar (KEWX), 127 km from the middle of the area, began a volume at 16:02 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.
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
Corpus Christi, TX (KCRP), launched 12:00Z, 4.0 hours before the alert went out and 179 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
- 1115 J/kg
- Mixed-layer CIN
- -101 J/kg
- Mixed-layer LCL
- 962 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -51 m²/s²
- 0-3 km storm-relative helicity
- -39 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 KEWX 141600
FFWEWX
TXC285-141900-
/O.NEW.KEWX.FF.W.0022.080914T1600Z-080914T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1100 AM CDT SUN SEP 14 2008
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS REISSUED A
* FLASH FLOOD WARNING FOR...
LAVACA COUNTY...
* UNTIL 200 PM CDT.
* AT 1048 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED
THAT RAINFALL CONTINUES ACROSS SOUTHERN LAVACA COUNTY. AN
ESTIMATED 5 TO 8 INCHES OF RAIN HAVE FALLEN SOUTHWEST OF EZZELL
AND LESSER AMOUNTS OF 3 TO 5 INCHES HAVE FALLEN SOUTH OF SPEAKS.
ADDITIONAL RAINFALL AMOUNTS OF 1 TO 3 INCHES WILL CAUSE MORE
CREEKS TO RISE AND FLOOD LOW LYING ROADS.
* LOCATIONS IN THE WARNING AREA INCLUDE SUBLIME...SPEAKS AND EZZELL.
REPORT FLASH FLOODING TO THE NEAREST LAW ENFORCEMENT AGENCY.
LAT...LON 2935 9657 2907 9691 2906 9693 2925 9711
2955 9677
$$1 follow-up statement
000
WGUS74 KEWX 141652
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1152 AM CDT SUN SEP 14 2008
TXC285-141700-
/O.CAN.KEWX.FF.W.0022.000000T0000Z-080914T1900Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LAVACA TX-
1152 AM CDT SUN SEP 14 2008
...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR LAVACA COUNTY...
THE HEAVY RAINS HAVE REDEVELOPED OFFSHORE...WITH JUST AREAS OF LIGHT
TO MODERATE RAIN REMAINING OVER LAVACA COUNTY. THEREFORE...THE FLASH
FLOOD WARNING IS CANCELED.
LAT...LON 2935 9657 2907 9691 2906 9693 2925 9711
2955 9677
$$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 Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Sep 14, 10:11 AM CDT, 49 minutes earlier.
Area forecast discussion, Sep 14, 10:11 AM CDT, 49 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1011 AM CDT SUN SEP 14 2008 .DISCUSSION... FORECAST UPDATED TO BRING THE MENTION OF SHOWERS AND THUNDERSTORMS INTO THIS MORNING AS CONVECTION HAS DEVELOPED RAPIDLY ALONG AN E-W PRE-FRONTAL BOUNDARY ACROSS S CENTRAL TX. THE BOUNDARY WILL BE SLOW TO MOVE SWD TODAY UNTIL THE ACTUAL COLD FRONT ACROSS CENTRAL TX CATCHES UP LATER THIS AFTERNOON AND EVENING. HAVE ALSO ADDED MENTION OF LOCALLY HEAVY RAINFALL TO THE SRN CWA AS CONVECTION WILL BE SLOW MOVING. IN ADDITION A S/W TROF OVER WEST TX THIS MORNING HAS TRIGGERED SHOWERS OVER SW TX BUT THIS ACTIVITY PRESENTLY DECREASING OVER THE FAR WESTERN CWA...HOWEVER EXPECT SOME REGENERATION OF ELEVATED CONVECTION THIS AFTERNOON AS THE S/W MOVES SLIDES EASTWARD ACROSS TX. && .PREV DISCUSSION... /ISSUED 647 AM CDT SUN SEP 14 2008/ AVIATION... PREVIOUS DISCUSSION COVERED SHRA/TSRA GENERATION MECHANISMS. VFR SKIES WILL PREVAIL WITH AREAS OF HIGH BASED CIGS, HOWEVER LOCAL MVFR CIGS/VSBYS ARE POSSIBLE IN AND NEAR ISOLD TO SCT SHRA/TSRA. HAVE ONLY MENTIONED CB AT TAF SITES DUE TO UNCERTAINTY WITH RESPECT TO TIMING AND DURATION. NLY WINDS OF 5 TO 15 KTS WILL PREVAIL WITH GREATEST SPEEDS AND OCNL GUSTS TO 25 KTS DURING THE DAYTIME HOURS. SOME GUSTS TO 30 KTS ARE POSSIBLE IN AND NEAR THE STRONGEST TSRA. PREV DISCUSSION... /ISSUED 329 AM CDT SUN SEP 14 2008/ DISCUSSION... CONVERGENCE BETWEEN THE WANING SEA-BREEZE AND REMNANT BAND OF THE IKE CIRCULATION HAS PRODUCED SCATTERED THUNDERSTORMS OVER THE EAST-CENTRAL PART OF OUR AREA FROM EARLY EVENING TO PRESENT. EXPECT THIS ACTIVITY TO SLOWLY PROPAGATE EAST THROUGH MID-MORNING. MEANWHILE...A WEAK MCS IS MOVING THROUGH THE BIG COUNTRY AND MAY GRAZE NORTHERN VAL VERDE...EDWARDS...AND KERR COUNTIES BY LATE MORNING. THIS MCS IS BEING FORCED BY A SHORTWAVE TROUGH THAT WILL MOVE EAST ACROSS TEXAS THIS MORNING. COOLER AND MUCH DRIER AIR WILL FILTER SOUTH BEHIND THE SHORTWAVE TROUGH...BUT THE RESULTING FEATURE WILL NOT BE A CLASSIC COLD FRONT. INSTEAD...EXPECT A BRIDGING BOUNDARY BETWEEN HIGH PRESSURE CENTERED OVER THE NORTHERN HIGH PLAINS AND REMNANT NORTHERLY CIRCULATION FROM IKE. WINDS WILL GRADUALLY STRENGTHEN FROM THE NORTH...WITH THE COOL/DRY AIR MASS NOT FELT UNTIL THIS EVENING. THE BOUNDARY SHOULD STILL PROVIDE ENOUGH LIFT FOR SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON...ESPECIALLY SOUTH OF I-10/US-90. PRECIPITABLE WATER IN EXCESS OF TWO INCHES AND RELATIVELY WEAK WINDS INDICATE PLENTY OF WATER VAPOR TO CONDENSE AND SLOW STORM MOTION...SO EXPECT ISOLATED LOCALLY HEAVY RAIN IN. HOWEVER...THERE IS NO NEED FOR A FLASH FLOOD WATCH. THE STALLED BOUNDARY TO OUR SOUTH MAY STILL PRODUCE A FEW SHOWERS AND THUNDERSTORMS ACROSS THE SOUTHERN COUNTIES ON MONDAY. THE REST OF THE WEEK WILL FEATURE A RIDGE OVER THE WESTERN STATES BREAKING DOWN OVER THE PLAINS. LOOK FOR SEASONALLY COOL NIGHTS/MORNINGS...WARM AFTERNOONS...AND LOW HUMIDITY TUESDAY THROUGH THURSDAY. WEAK RETURN FLOW BEGINS ON FRIDAY...WITH THE USUAL RETURN OF HIGHER HUMIDITY...MORNING LOW CLOUDS/PATCHY FOG...AND ISOLATED AFTERNOON STORMS ALONG THE SEA BREEZE. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 93 67 86 59 84 / 20 10 10 - - AUSTIN BERGSTROM INTL AIRPORT 94 65 84 53 84 / 20 10 10 - - DEL RIO INTL AIRPORT 93 66 85 59 83 / 20 20 20 - - SAN ANTONIO INTL AIRPORT 93 65 85 59 85 / 30 20 10 - - && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 01/06
Hazardous weather outlook, Sep 14, 5:01 AM CDT, 5 hours 59 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 501 AM CDT SUN SEP 14 2008 TXZ171>173-183>194-202>209-217>225-228-151015- LLANO-BURNET-WILLIAMSON-VAL VERDE-EDWARDS-REAL-KERR-BANDERA- GILLESPIE-KENDALL-BLANCO-HAYS-TRAVIS-BASTROP-LEE-KINNEY-UVALDE- MEDINA-BEXAR-COMAL-GUADALUPE-CALDWELL-FAYETTE-MAVERICK-ZAVALA- FRIO-ATASCOSA-WILSON-KARNES-GONZALES-DE WITT-LAVACA-DIMMIT- 501 AM CDT SUN SEP 14 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... A SURFACE BOUNDARY WILL INTERACT WITH A MOIST AIRMASS TO PRODUCE ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS. MOST ACTIVITY WILL BE THIS AFTERNOON INTO THIS EVENING. LOCALLY HEAVY RAINFALL IS POSSIBLE SOUTH OF A TAYLOR TO AUSTIN TO BANDERA TO DEL RIO LINE MAINLY THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 7:56 AM CDT | Flash Flood Warning | EWX | Lavaca | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2008Every flash flood warning in 2008
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.