Alert archive / Texas / Flash Flood Warnings in 2010
Flash Flood Warning 13, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 17, 2010, 11:21 AM CDT for Bexar County, Texas. It was in force for 114 min. 3 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
- Apr 17, 2010, 11:21 AM CDT (16:21 UTC)
- Expired
- Apr 17, 2010, 1:15 PM CDT
- In force
- 114 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 42 km from the middle of the area, began a volume at 16:23 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 |
|---|---|---|---|
| Apr 17, 11:30 AM CDT | FLOOD | 9 W San Antonio, TX | ROADS FLOODED AND CARS STRANDED NEAR INGRAM AND MARBACH ROADS. |
| Apr 17, 11:30 AM CDT | FLASH FLOOD | 9 W San Antonio, TX | ROADS FLOODED AND CARS STRANDED NEAR INGRAM AND MARBACH ROADS. |
| Apr 17, 12:30 PM CDT | FLOOD | 10 Wsw San Antonio, TX | POTRANCO ROAD WEST OF LOOP 1604 IS 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, 4.4 hours before the alert went out and 231 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
- 898 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 533 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
110
WGUS54 KEWX 171621
FFWEWX
TXC029-171815-
/O.NEW.KEWX.FF.W.0013.100417T1621Z-100417T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1121 AM CDT SAT APR 17 2010
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BEXAR COUNTY...
* UNTIL 115 PM CDT.
* AT 1108 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE
FLASH FLOODING FROM ADDITIONAL SHOWERS AND THUNDERSTORMS
PRODUCING RAINFALL AMOUNTS OF 1 TO 3 INCHES OVER THE NEXT
COUPLE HOURS...MORE NUMEROUS AND INTENSE OVER EAST BEXAR
COUNTY.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
WINDCREST...UNIVERSAL CITY...TIMBERWOOD PARK...THE DOMINION...
TERRELL HILLS...ST. HEDWIG...SHAVANO PARK...SEA WORLD...SCHERTZ...
SAN ANTONIO...OLMOS PARK...LIVE OAK...LEON VALLEY...LEON SPRINGS...
KIRBY...HOLLYWOOD PARK...HILL COUNTRY VILLA...HELOTES...FAIR OAKS
RANCH...CROSS MOUNTAIN...ALAMO HEIGHTS AND BULVERDE.
RUNOFF FROM HEAVY RAINS EARLIER THIS MORNING WILL CONTINUE WITH
RISES CONTINUING DESPITE THE RAIN HAVING STOPPED IN AREAS. 4.68
INCHES OF RAIN WAS REPORTED IN THE LAST 3 HOURS NEAR HELOTES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2925 9880 2970 9881 2972 9878 2976 9856
2972 9845 2975 9842 2974 9837 2972 9835
2971 9839 2968 9839 2961 9834 2956 9829
2957 9825 2949 9817 2949 9813 2941 9817
2911 9842
$$1 follow-up statement
404
WGUS74 KEWX 171757
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1257 PM CDT SAT APR 17 2010
TXC029-171815-
/O.CON.KEWX.FF.W.0013.000000T0000Z-100417T1815Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
1257 PM CDT SAT APR 17 2010
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 PM CDT FOR BEXAR
COUNTY...
AT 1241 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT SCATTERED SHOWERS AND THUNDERSTORM OVER SAN ANTONIO FROM
LACKLAND AFB TO SEA WORLD AND VON ORMY TO SOUTH DOWNTOWN MOVING
SLOWLY EAST AND SOUTHEAST. ADDITIONAL SCATTERED SHOWERS AND
THUNDERSTORMS WERE DEVELOPING ALONG A COLD FRONT TO THE WEST NEAR
HONDO MOVING EAST. ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE
POSSIBLE FOR THE NEXT SEVERAL HOURS.
POTRANCO ROAD WEST OF LOOPS 1604 IS CLOSED. NEAR 5 INCHES OF RAIN
HAS FALLEN NEAR HELOTES SINCE THIS MORNING. MOTORISTS DRIVING IN AND
AROUND SAN ANTONIO WILL NEED TO DRIVE WITH EXTREME CAUTION DUE
POSSIBLE FLOODED LOW WATER CROSSINGS AND STANDING WATER ON ROADS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DO NOT DRIVE WHERE WATER COVERS THE ROAD. EVEN SUVS AND PICKUPS WILL
BE SWEPT AWAY BY AS LITTLE AS TWO FEET OF RUSHING WATER. TURN AROUND
DON'T DROWN.
&&
LAT...LON 2925 9880 2970 9881 2972 9878 2976 9856
2972 9845 2975 9842 2974 9837 2972 9835
2971 9839 2968 9839 2961 9834 2956 9829
2957 9825 2949 9817 2949 9813 2941 9817
2911 9842
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 16, 7:58 PM CDT | Areal Flood Advisory | EWX | Bexar | 2 hr |
| Apr 16, 9:23 PM CDT | Flash Flood Warning | EWX | Caldwell | 97 min |
| Apr 17, 4:07 AM CDT | Flash Flood Watch | EWX | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 23 more | 21 hr |
| Apr 17, 7:47 AM CDT | Areal Flood Advisory | EWX | Bandera, Bexar, Kendall, Medina | 3 hr |
| Apr 17, 8:39 AM CDT | Flash Flood Warning | EWX | Bandera, Bexar, Kendall, Medina | 3 hr |
| Apr 17, 9:11 AM CDT | Flash Flood Warning | EWX | Bexar, Comal, Guadalupe, Kendall | 3 hr |
| Apr 17, 9:44 AM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Comal, Guadalupe, Karnes, Wilson | 106 min |
| Apr 17, 10:34 AM CDT | Areal Flood Advisory | EWX | Comal, Hays, Travis | 116 min |
| Apr 17, 10:43 AM CDT | Flash Flood Warning | EWX | Atascosa, Bexar, Comal, Gonzales, Guadalupe, Wilson | 3 hr |
| Apr 17, 12:31 PM CDT | Areal Flood Advisory | EWX | Atascosa, Frio | 119 min |
| Apr 17, 1:15 PM CDT | Flash Flood Warning | EWX | Atascosa, Bandera, Bexar, Frio, Karnes, Medina and 1 more | 2 hr |
| Apr 17, 3:42 PM CDT | Flash Flood Warning | EWX | Bandera, Medina | 2 hr |
| Apr 17, 5:58 PM CDT | Areal Flood Advisory | EWX | Williamson | 2 hr |
| Apr 17, 6:22 PM CDT | Areal Flood Advisory | EWX | Hays, Travis | 2 hr |
| Apr 17, 6:22 PM CDT | Flash Flood Warning | EWX | Williamson | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2010Every flash flood warning in 2010
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.