Alert archive / Texas / Flash Flood Watches in 2007

Flash Flood Watch 16, NWS Austin/San Antonio, TX

May 28, 2007Fayette County, Lavaca County, Lee County, Texas

NWS Austin/San Antonio, TX issued this flash flood watch at May 28, 2007, 4:20 AM CDT for Fayette County, Lavaca County, Lee County, Texas. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: May 28, 2007, 4:20 AM CDT (09:20 UTC)
Expired: May 28, 2007, 12:00 PM CDT
In force: 8 hr
Issued by: NWS Austin/San Antonio, TX
Flood severity: None

Counties Fayette County, TX, Lavaca County, TX, Lee County, TX

The radar

The Ft Hood radar (KGRK), 105 km from the middle of the area, began a volume at 09:24 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

Corpus Christi, TX (KCRP), launched 00:00Z, 9.3 hours before the alert went out and 240 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: 1365 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 730 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 94 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 2.5

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 May 27, 11:45 PM CDT, 4 hours 35 minutes earlier.

Area forecast discussion, May 27, 11:45 PM CDT, 4 hours 35 minutes before

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Hazardous weather outlook, May 27, 9:56 PM CDT, 6 hours 24 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
956 PM CDT SUN MAY 27 2007

TXZ171>173-183>194-202>209-217>225-228-281100-
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-
956 PM CDT SUN MAY 27 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TONIGHT
A FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH MIDNIGHT FOR THE
EASTERN SECTIONS OF SOUTH CENTRAL TEXAS THE HILL COUNTRY.
SCATTERED SHOWERS AND THUNDERSTORMS PRODUCING LOCALLY HEAVY RAIN
AND FLASH FLOODING ARE POSSIBLE.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY
THERE IS A GOOD CHANCE OF SHOWERS AND THUNDERSTORMS WITH HEAVY
RAIN OVER THE EASTERN HALF OF SOUTH CENTRAL TEXAS MONDAY...AND
THE FAR EASTERN SECTIONS ON TUESDAY.

.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
May 28, 6:28 AM CDT	Flash Flood Warning	EWX	Lavaca	3 hr
May 28, 8:26 AM CDT	Flash Flood Warning	EWX	Fayette, Lee	3 hr
May 28, 4:18 PM CDT	Flash Flood Warning	EWX	Fayette, Lavaca	4 hr
May 28, 4:18 PM CDT	Flash Flood Warning	EWX	Fayette, Lavaca, Lee	4 hr
May 28, 4:35 PM CDT	Flash Flood Warning	EWX	Williamson	4 hr

Nearby

Flash Flood Watches in Texas, 2007 Every flash flood watch in 2007

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.