Alert archive / Texas / Flash Flood Warnings in 2018
Flash Flood Warning 32, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 9, 2018, 7:21 AM CDT for 4 counties in Texas. It was in force for 3 hr. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 9, 2018, 7:21 AM CDT (12:21 UTC)
- Expired
- Sep 9, 2018, 10:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Caldwell County, TX, Comal County, TX, Guadalupe County, TX, Hays County, TX
The radar
The Austin/San Antonio radar (KEWX), 6 km from the middle of the area, began a volume at 12:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 9, 8:26 AM CDT | FLASH FLOOD | 1 Se Kyle, TX | KYLE PD REPORTING LEHMAN ROAD SOUTH CLOSED AT MASONWOOD DUE TO WATER OVER ROADWAY |
| Sep 9, 8:45 AM CDT | FLASH FLOOD | 6 Wsw Wimberley, TX | HAYS COUNTY REPORTING WAYSIDE DRIVE AT BLANCO RIVER CLOSED |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 0.4 hours before the alert went out and 233 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
- 1507 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 812 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- -10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
885
WGUS54 KEWX 091221
FFWEWX
TXC055-091-187-209-091515-
/O.NEW.KEWX.FF.W.0032.180909T1221Z-180909T1515Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
721 AM CDT SUN SEP 9 2018
The National Weather Service in Austin San Antonio has issued a
* Flash Flood Warning for...
Western Caldwell County in south central Texas...
Hays County in south central Texas...
Guadalupe County in south central Texas...
Comal County in south central Texas...
* Until 1015 AM CDT
* At 720 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to two inches of rain have
already fallen. Flash flooding is expected to begin shortly.
* Some locations that will experience flooding include...
New Braunfels, San Marcos, Schertz, Kyle, Seguin, Cibolo, Buda,
Lockhart, Selma, Luling, Dripping Springs, Wimberley, Canyon Lake
Dam, Canyon Lake, Garden Ridge, McQueeney, Woodcreek, Martindale,
Marion and Uhland.
Additional rainfall amounts of 1 to 3 inches are possible in the
warned area.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
&&
LAT...LON 3002 9772 2995 9751 2938 9786 2938 9809
2936 9811 2943 9814 2948 9812 2948 9815
2955 9823 2955 9826 2959 9831 2999 9835
3004 9830 3010 9827 3032 9812
$$
CPThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 9:49 PM CDT | River Flood Warning | EWX | Val Verde | 5 hr |
| Sep 8, 10:27 PM CDT | River Flood Warning | EWX | Dimmit | 4 days |
| Sep 9, 2:12 AM CDT | Areal Flood Advisory | EWX | Bandera, Medina | 3 hr |
| Sep 9, 3:58 AM CDT | Areal Flood Advisory | EWX | Bexar | 3 hr |
| Sep 9, 4:25 AM CDT | Flash Flood Warning | EWX | Bandera, Medina | 6 hr |
| Sep 9, 4:43 AM CDT | Flash Flood Warning | EWX | Bexar, Comal | 12 hr |
| Sep 9, 4:57 AM CDT | Areal Flood Advisory | EWX | Bastrop, Travis | 3 hr |
| Sep 9, 5:36 AM CDT | Areal Flood Advisory | EWX | Comal, Hays | 114 min |
| Sep 9, 5:51 AM CDT | Areal Flood Advisory | EWX | Atascosa, Karnes, Wilson | 114 min |
| Sep 9, 6:35 AM CDT | Areal Flood Advisory | EWX | Atascosa, Frio, Medina | 3 hr |
| Sep 9, 8:09 AM CDT | Areal Flood Advisory | EWX | Medina | 2 hr |
| Sep 9, 8:11 AM CDT | Areal Flood Advisory | EWX | Gonzales, Guadalupe, Karnes, Wilson | 2 hr |
| Sep 9, 9:00 AM CDT | River Flood Warning | EWX | Bexar | 23 hr |
| Sep 9, 9:00 AM CDT | River Flood Warning | EWX | Bexar, Wilson | 54 hr |
| Sep 9, 9:00 AM CDT | River Flood Warning | EWX | Karnes, Wilson | 3 days |
| Sep 9, 9:00 AM CDT | River Flood Warning | EWX | Karnes, Wilson | 42 hr |
| Sep 9, 9:00 AM CDT | River Flood Warning | EWX | Karnes | 72 hr |
| Sep 9, 9:14 AM CDT | River Flood Warning | EWX | Goliad, Karnes | 7 days |
| Sep 9, 9:14 AM CDT | River Flood Warning | EWX | Bexar | 30 hr |
| Sep 9, 9:18 AM CDT | River Flood Warning | EWX | Frio | 4 days |
| Sep 9, 9:49 AM CDT | Areal Flood Advisory | EWX | Bastrop, Travis | 3 hr |
| Sep 9, 10:01 AM CDT | Flash Flood Warning | EWX | Bandera, Medina | 6 hr |
| Sep 9, 10:12 AM CDT | Flash Flood Warning | EWX | Caldwell, Comal, Guadalupe, Hays | 6 hr |
| Sep 9, 10:56 AM CDT | Areal Flood Advisory | EWX | Kendall | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2018Every flash flood warning in 2018
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.