Alert archive / Texas / Flash Flood Watches in 2019

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

May 9, 201924 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood watch at May 9, 2019, 4:30 AM CDT for 24 counties in Texas. It took effect at May 9, 2019, 1:00 PM CDT. It was in force for 49 hr.

The area

The counties it named.

The facts

Issued: May 9, 2019, 4:30 AM CDT (09:30 UTC)
In effect from: May 9, 2019, 1:00 PM CDT
Expired: May 11, 2019, 2:06 PM CDT
In force: 49 hr
Issued by: NWS Austin/San Antonio, TX
Flood severity: None

All 24 counties

Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Gillespie County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Medina County, TX, Travis County, TX, Williamson County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 16 km from the middle of the area, began a volume at 09:34 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

Fort Worth, TX (KFWD), launched 00:00Z, 9.5 hours before the alert went out and 341 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 828 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 133 m²/s²
0-3 km storm-relative helicity: 169 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 May 9, 4:14 AM CDT, 16 minutes earlier.

Area forecast discussion, May 9, 4:14 AM CDT, 16 minutes before

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Hazardous weather outlook, May 8, 6:30 PM CDT, 10 hours before

Hazardous Weather Outlook...UPDATED
National Weather Service Austin/San Antonio TX
630 PM CDT Wed May 8 2019

TXZ171>173-183>194-202>209-217>225-228-091100-
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-
630 PM CDT Wed May 8 2019

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Tonight.

No Hazardous weather is expected tonight.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Periods of showers and thunderstorms continue Thursday afternoon
through Tuesday. The threat for heavy rains and flooding is
elevated with strong to severe storms also possible. The highest
threats are on Thursday through Saturday.

.SPOTTER INFORMATION STATEMENT...

Please report any severe weather or flooding to the National Weather
Service.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 9, 6:59 AM CDT	Special Weather Statement	EWX	Kinney	46 min
May 9, 7:07 AM CDT	Severe Thunderstorm Warning	EWX	Kinney, Maverick	30 min
May 9, 9:51 AM CDT	Special Weather Statement	EWX	Dimmit	39 min
May 9, 11:28 AM CDT	Special Weather Statement	EWX	Frio	47 min
May 9, 12:30 PM CDT	Special Weather Statement	EWX	Kerr, Real	45 min
May 9, 12:37 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kerr, Real	53 min
May 9, 1:05 PM CDT	Areal Flood Advisory	EWX	Bandera, Kerr, Real	3 hr
May 9, 1:22 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Gillespie, Kendall, Kerr, Real	53 min
May 9, 1:27 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	37 min
May 9, 1:30 PM CDT	Special Weather Statement	EWX	Medina	45 min
May 9, 1:59 PM CDT	Special Weather Statement	EWX	Kerr	46 min
May 9, 1:59 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall, Kerr	31 min
May 9, 2:26 PM CDT	Special Weather Statement	EWX	Edwards	49 min
May 9, 2:34 PM CDT	Special Weather Statement	EWX	Gillespie	41 min
May 9, 2:53 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Real	67 min
May 9, 3:22 PM CDT	Special Weather Statement	EWX	Bandera	38 min
May 9, 3:40 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Uvalde	80 min
May 9, 3:52 PM CDT	Special Weather Statement	EWX	Comal, Hays, Kendall	53 min
May 9, 3:56 PM CDT	Severe Thunderstorm Warning	EWX	Comal, Hays	64 min
May 9, 4:25 PM CDT	Flash Flood Warning	EWX	Bexar, Comal, Hays, Kendall	3 hr
May 9, 4:35 PM CDT	Severe Thunderstorm Warning	EWX	Comal, Hays	33 min
May 9, 4:38 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	82 min
May 9, 4:56 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Real, Uvalde	22 min
May 9, 5:10 PM CDT	Special Weather Statement	EWX	Hays	50 min
May 9, 5:39 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	66 min
May 9, 5:50 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	55 min
May 9, 6:13 PM CDT	Special Weather Statement	EWX	Gonzales	47 min
May 9, 6:24 PM CDT	Severe Thunderstorm Warning	EWX	Fayette, Lavaca	66 min
May 9, 6:25 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Karnes	65 min
May 9, 6:28 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales	47 min
May 9, 6:55 PM CDT	Special Weather Statement	EWX	Val Verde	35 min
May 9, 6:56 PM CDT	Areal Flood Advisory	EWX	DeWitt, Fayette, Gonzales, Lavaca	3 hr

Nearby

Flash Flood Watches in Texas, 2019 Every flash flood watch in 2019

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.