Alert archive / Texas / Flash Flood Watches in 2008

Flash Flood Watch 5, NWS Austin/San Antonio, TX

August 23, 20085 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood watch at Aug 23, 2008, 3:11 PM CDT for 5 counties in Texas. It took effect at Aug 23, 2008, 5:00 PM CDT. It was in force for 11 hr.

The area

The counties it named.

The facts

Issued: Aug 23, 2008, 3:11 PM CDT (20:11 UTC)
In effect from: Aug 23, 2008, 5:00 PM CDT
Expired: Aug 24, 2008, 4:05 AM CDT
In force: 11 hr
Issued by: NWS Austin/San Antonio, TX
Flood severity: None

Counties Dimmit County, TX, Kinney County, TX, Maverick County, TX, Val Verde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 24 km from the middle of the area, began a volume at 20:15 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

Del Rio, TX (KDRT), launched 12:00Z, 8.2 hours before the alert went out and 65 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: 214 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 493 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: -18 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Aug 23, 2:48 PM CDT, 23 minutes earlier.

Area forecast discussion, Aug 23, 2:48 PM CDT, 23 minutes before

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Hazardous weather outlook, Aug 23, 4:47 AM CDT, 10 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
447 AM CDT SAT AUG 23 2008

TXZ171>173-183>194-202>209-217>225-228-241000-
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-
447 AM CDT SAT AUG 23 2008

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT...
LOCALLY HEAVY RAINS ARE POSSIBLE TODAY AND EARLY THIS EVENING
ACROSS THE RIO GRANDE PLAINS MAINLY WEST OF A LINE FROM
ROCKSPRINGS...TO UVALDE...DOWN TO COTULLA. WIDESPREAD RAINS OF 1
TO 2 INCHES ARE POSSIBLE ACROSS THIS AREA WITH ISOLATED TOTALS OF
3 TO 4 INCHES POSSIBLE. THESE HEAVY RAINS MAY PRODUCE FLOODING IN
A FEW ISOLATED LOCATIONS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 23, 3:57 AM CDT	Areal Flood Advisory	EWX	Kinney, Uvalde, Val Verde	2 hr
Aug 23, 7:16 AM CDT	Areal Flood Advisory	EWX	Edwards, Kinney, Val Verde	119 min
Aug 23, 8:49 AM CDT	Areal Flood Advisory	EWX	Dimmit, Maverick	116 min
Aug 23, 12:40 PM CDT	Areal Flood Advisory	EWX	Dimmit, Kinney, Maverick, Uvalde, Val Verde, Zavala	110 min
Aug 23, 1:57 PM CDT	Areal Flood Advisory	EWX	Bexar, Comal, Guadalupe	2 hr
Aug 23, 2:26 PM CDT	Flash Flood Warning	EWX	Uvalde	2 hr
Aug 23, 2:46 PM CDT	Areal Flood Advisory	EWX	Frio, Zavala	119 min
Aug 23, 4:13 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Wilson	2 hr
Aug 23, 4:26 PM CDT	Areal Flood Advisory	EWX	Frio, Zavala	2 hr
Aug 23, 5:13 PM CDT	Areal Flood Advisory	EWX	Medina	2 hr

Nearby

Flash Flood Watches in Texas, 2008 Every flash flood watch 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.