Alert archive / Texas / Flash Flood Watches in 2015

Flash Flood Watch 19, NWS Austin/San Antonio, TX

October 24, 201513 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood watch at Oct 24, 2015, 4:00 PM CDT for 13 counties in Texas. It was in force for 8 hr.

The area

The counties it named.

The facts

Issued: Oct 24, 2015, 4:00 PM CDT (21:00 UTC)
Expired: Oct 24, 2015, 11:46 PM CDT
In force: 8 hr
Issued by: NWS Austin/San Antonio, TX

Counties Bastrop County, TX, Caldwell County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Travis County, TX, Williamson County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 48 km from the middle of the area, began a volume at 21:02 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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.0 hours before the alert went out and 225 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: 1121 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 628 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 87 m²/s²
0-3 km storm-relative helicity: 140 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.8

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 Oct 24, 12:27 PM CDT, 3 hours 33 minutes earlier.

Area forecast discussion, Oct 24, 12:27 PM CDT, 3 hours 33 minutes before

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Hazardous weather outlook, Oct 24, 7:15 AM CDT, 8 hours 45 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
715 AM CDT SAT OCT 24 2015

TXZ171>173-183>194-202>209-217>225-228-251215-
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-
715 AM CDT SAT OCT 24 2015

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT.

A FLASH FLOOD WATCH REMAINS IN EFFECT FOR ALL OF SOUTH CENTRAL
TEXAS THROUGH SUNDAY MORNING. AN UPPER DISTURBANCE INTERACTING
WITH MOISTURE FROM PACIFIC TROPICAL STORM PATRICIA WILL PRODUCE A
THREAT OF VERY HEAVY RAINFALL OVER MUCH OF SOUTH CENTRAL
TEXAS...ESPECIALLY AREAS ALONG AND EAST OF I-35. 2 TO 4 INCHES OF
RAINFALL CAN BE EXPECTED ALONG THE I-35 CORRIDOR WITH UP TO 6
INCHES EAST OF INTERSTATE 37. ISOLATED SPOTS OF 8 TO 12 INCHES ARE
STILL POSSIBLE ACROSS THE FAR SOUTHEASTERN COUNTIES.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

AS THE COLD FRONT PUSHES OUT OF THE AREA AND THE UPPER LEVEL
DISTURBANCE MOVES TO THE SOUTHEAST...ADDITIONAL 1 TO 3 INCHES OF
RAINFALL ARE POSSIBLE ACROSS THE FAR SOUTHEAST COUNTIES FOR A
POTENTIAL OF FLOODING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE POSSIBLE SATURDAY.

In the hours before

Local storm report, Oct 24, 10:50 AM CDT, 5 hours 10 minutes before

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Local storm report, Oct 24, 10:55 AM CDT, 5 hours 5 minutes before

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Local storm report, Oct 24, 11:14 AM CDT, 4 hours 46 minutes before

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Local storm report, Oct 24, 11:39 AM CDT, 4 hours 21 minutes before

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Local storm report, Oct 24, 12:22 PM CDT, 3 hours 38 minutes before

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Local storm report, Oct 24, 12:36 PM CDT, 3 hours 24 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 23, 8:19 PM CDT	Areal Flood Advisory	EWX	Bexar, Comal, Guadalupe	116 min
Oct 23, 10:55 PM CDT	Areal Flood Advisory	EWX	Llano	3 hr
Oct 23, 11:45 PM CDT	Areal Flood Advisory	EWX	Burnet, Llano	3 hr
Oct 24, 12:28 AM CDT	Areal Flood Advisory	EWX	Val Verde	4 hr
Oct 24, 1:39 AM CDT	Flash Flood Warning	EWX	Edwards, Val Verde	4 hr
Oct 24, 1:47 AM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar	3 hr
Oct 24, 1:50 AM CDT	Flash Flood Warning	EWX	Burnet, Llano	4 hr
Oct 24, 2:00 AM CDT	Areal Flood Advisory	EWX	Bandera, Blanco, Gillespie, Kendall, Kerr, Real	4 hr
Oct 24, 3:00 AM CDT	Flash Flood Warning	EWX	Bexar, Comal, Guadalupe, Kendall	4 hr
Oct 24, 3:06 AM CDT	Special Weather Statement	EWX	Val Verde	54 min
Oct 24, 3:21 AM CDT	Areal Flood Advisory	EWX	Williamson	114 min
Oct 24, 3:29 AM CDT	Flash Flood Warning	EWX	Bandera, Edwards, Kerr, Real	3 hr
Oct 24, 3:52 AM CDT	Areal Flood Advisory	EWX	Travis, Williamson	3 hr
Oct 24, 4:23 AM CDT	Flash Flood Warning	EWX	Travis, Williamson	7 hr
Oct 24, 4:43 AM CDT	Areal Flood Advisory	EWX	Edwards, Kinney, Val Verde	3 hr
Oct 24, 4:50 AM CDT	Flash Flood Warning	EWX	Blanco, Comal, Gillespie, Hays, Kendall, Kerr	2 hr
Oct 24, 5:53 AM CDT	Flash Flood Warning	EWX	Bastrop, Lee	6 hr
Oct 24, 6:22 AM CDT	Flash Flood Warning	EWX	Edwards, Real, Uvalde	3 hr
Oct 24, 6:37 AM CDT	Special Weather Statement	EWX	Bastrop, Lee	53 min
Oct 24, 6:48 AM CDT	Flash Flood Warning	EWX	Bandera, Bexar, Blanco, Caldwell, Comal, Gillespie and 6 more	3 hr
Oct 24, 8:16 AM CDT	Flash Flood Warning	EWX	Caldwell, Fayette, Gonzales, Guadalupe	3 hr
Oct 24, 8:20 AM CDT	River Flood Warning	EWX	Val Verde	36 hr
Oct 24, 8:20 AM CDT	River Flood Warning	EWX	Val Verde	45 hr
Oct 24, 8:20 AM CDT	River Flood Warning	EWX	Val Verde	32 hr
Oct 24, 8:32 AM CDT	Areal Flood Advisory	EWX	Maverick	3 hr
Oct 24, 8:46 AM CDT	River Flood Warning	EWX	Blanco	25 hr
Oct 24, 9:16 AM CDT	Flash Flood Warning	EWX	Atascosa, Bexar, Frio, Karnes, Medina, Wilson	3 hr
Oct 24, 9:17 AM CDT	Flash Flood Warning	EWX	DeWitt, Lavaca	3 hr
Oct 24, 9:24 AM CDT	Areal Flood Advisory	EWX	Bandera, Edwards, Kerr, Real	3 hr
Oct 24, 9:42 AM CDT	Flash Flood Warning	EWX	Bexar, Caldwell, Comal, Guadalupe, Hays	2 hr
Oct 24, 9:55 AM CDT	Areal Flood Advisory	EWX	Blanco, Gillespie, Kendall, Kerr	3 hr
Oct 24, 9:59 AM CDT	River Flood Warning	EWX	Bexar, Wilson	45 hr
Oct 24, 10:04 AM CDT	River Flood Warning	EWX	Kerr	27 hr
Oct 24, 10:04 AM CDT	River Flood Warning	EWX	Comal, Gonzales, Guadalupe	19 hr
Oct 24, 10:04 AM CDT	River Flood Warning	EWX	Comal, Guadalupe	24 hr
Oct 24, 11:09 AM CDT	Areal Flood Advisory	EWX	Travis, Williamson	6 hr
Oct 24, 11:36 AM CDT	Areal Flood Advisory	EWX	Bastrop, Lee	3 hr
Oct 24, 11:45 AM CDT	Areal Flood Advisory	EWX	Caldwell, Fayette, Gonzales, Guadalupe	3 hr
Oct 24, 11:57 AM CDT	Areal Flood Advisory	EWX	Bexar, Caldwell, Comal, Guadalupe, Hays, Wilson	3 hr
Oct 24, 12:12 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Frio, Medina, Wilson	2 hr
Oct 24, 12:20 PM CDT	Areal Flood Advisory	EWX	Atascosa, DeWitt, Karnes, Lavaca	115 min
Oct 24, 2:17 PM CDT	Areal Flood Advisory	EWX	DeWitt, Karnes, Lavaca, Wilson	3 hr
Oct 24, 2:23 PM CDT	Areal Flood Advisory	EWX	Bastrop, Lee	3 hr
Oct 24, 2:30 PM CDT	Areal Flood Advisory	EWX	Bastrop, Lee	3 hr
Oct 24, 2:43 PM CDT	Areal Flood Advisory	EWX	Caldwell, Fayette, Gonzales, Guadalupe	3 hr

Nearby

Flash Flood Watches in Texas, 2015 Every flash flood watch in 2015

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.