Alert archive / Texas / Flash Flood Warnings in 2007

Flash Flood Warning 436, NWS Austin/San Antonio, TX

July 28, 2007Kendall County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 28, 2007, 10:17 PM CDT for Kendall County, Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 28, 2007, 10:17 PM CDT (03:17 UTC)
Expired: Jul 29, 2007, 1:15 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 71 km from the middle of the area, began a volume at 03:17 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

Del Rio, TX (KDRT), launched 00:00Z, 3.3 hours before the alert went out and 215 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: 949 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 9 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KEWX 290321
FFWEWX
TXC259-290615-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1017 PM CDT SAT JUL 28 2007

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KENDALL COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 115 AM CDT

* AT 1012 PM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
  RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING FROM
  FROM THUNDERSTORMS OVER THE WARNED AREA. RAINFALL RATES OF 1 TO 3
  INCHES PER HOUR WERE NOTED SISTERDALE WEST ALONG FARM ROAD 473 TO
  COMFORT AND NORTH ALONG FARM ROAD 1376 TO 10 MILES NORTH OF
  SISTERDALE.  

WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.

LAT...LON 2985 9890 2984 9865 3013 9860 3012 9891

$$

1 follow-up statement

000 
WGUS74 KEWX 290546
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1245 AM CDT SUN JUL 29 2007

TXC259-290615-
KENDALL TX-
1245 AM CDT SUN JUL 29 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 115 AM CDT FOR
KENDALL COUNTY...

AT 1242 AM CDT...THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE NEAR 
FAIR OAKS RANCH AND BULVERDE...OR ABOUT 12 MILES SOUTH OF 
SISTERDALE...MOVING NORTH AT ONLY 5 TO 10 MPH.  

THESE CELLS ARE WEAKENING AND MAY NOT PRODUCE FLASH FLOODING RAINS. 
HOWEVER...ADDITIONAL SHOWERS AND THUNDERSTORMS ARE LIKELY TO 
REDEVELOP OVER KENDALL COUNTY. ANY ADDITIONAL RAINFALL DEVELOPING 
BETWEEN SISTERDALE AND KENDALIA WILL WARRANT A NEW OR EXTENDED FLASH 
FLOOD WARNING LATER THIS MORNING. LOW WATER CROSSINGS NEAR FM ROAD 
474 COULD REMAIN FLOODED THROUGH 115 AM.

IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD 
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS. DO NOT 
DRIVE WHERE WATER COVERS THE ROAD. TWO FEET OF RUSHING WATER CAN 
CARRY AWAY MOST VEHICLES...INCLUDING SUVS AND PICKUPS. TURN AROUND 
DONT DROWN.

LAT...LON 2985 9890 2984 9865 3013 9860 3012 9891

$$

What forecasters said that day

The local office's own words before this flash flood warning 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 warning went out at Jul 28, 8:32 PM CDT, 1 hour 45 minutes earlier.

Area forecast discussion, Jul 28, 8:32 PM CDT, 1 hour 45 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
832 PM CDT SAT JUL 28 2007

.UPDATE...
CONVECTION ON THE WANE THIS EVENING WITH THE LOSS OF DAYTIME HEATING.
HOWEVER THE BROAD UPPER LEVEL LOW IS STILL LOCATED OVER THE TRANS
PECOS REGION THIS EVENING. WILL CONTINUE LOW POPS OVERNIGHT...ESPECIALLY
IN THE VICINITY OF THE UPPER LOW. GRIDS AND TEXT PRODUCTS UPDATED BASED
ON CURRENT AND ANTICIPATED TRENDS.

&&

.PREV DISCUSSION... /ISSUED 644 PM CDT SAT JUL 28 2007/

AVIATION...
ISOLATED TO WIDELY SCATTERED SHOWERS AND THUNDERSTORMS WILL
CONTINUE THROUGH THE EVENING HOURS, HOWEVER MAY NOT IMPACT TAF
SITES AND WILL ONLY MENTION CB. MODELS SUGGEST SOME REDEVELOPMENT
LATE TONIGHT INTO SUNDAY MORNING ALONG THE RIO GRANDE AS WELL AS
ACROSS THE REMAINDER OF SOUTH CENTRAL TEXAS ON SUNDAY, HOWEVER
WILL ONLY GO WITH PROB30. VFR SKIES WILL PREVAIL, EXCEPT FOR MVFR
BETWEEN 09Z AND 16Z AS WELL AS IN SHOWERS AND THUNDERSTORMS.
VARIABLE WINDS LESS THAN 10 KTS TONIGHT WILL BE S TO SE 10 KTS OR
LESS ON SUNDAY. WIND GUSTS TO 30 KTS ARE POSSIBLE IN AND NEAR
SHOWERS AND THUNDERSTORMS.

PREV DISCUSSION... /ISSUED 321 PM CDT SAT JUL 28 2007/

DISCUSSION...
UPPER LOW DRAPED ACROSS WESTERN TEXAS HAS ALLOWED A CLUSTER OF
THUNDERSTORMS TO DEVELOP ALONG THE EDWARDS PLATEAU. SCATTERED
CONVECTION HAS BEEN PERSISTENT ACROSS THE EASTERN TWO-THIRDS OF
THE CWA...BUT HAS BEEN MORE OF A CHAOTIC NATURE RATHER THAN AN
ORGANIZED SYSTEM. EXPECT THIS ACTIVITY TO CONTINUE THROUGH THE
AFTERNOON HOURS...WITH THE BEST CHANCE FOR RAIN THIS EVENING SLIDING
TO THE SOUTHWEST COUNTIES AS THE UPPER LOW SHIFTS SOUTHWESTWARD. THE
ACTIVITY WILL BEGIN TO DIMINISH AFTER SUNSET AS DIURNAL HEATING IS
LOST. AS THE UPPER LOW CONTINUES TO WOBBLE ACROSS WEST TEXAS A
MOIST AND UNSTABLE ATMOSPHERE WILL REMAIN PERCHED OVER SOUTH CENTRAL
TEXAS FOR AT LEAST ANOTHER DAY. ANOTHER ROUND OF CONVECTIVE ACTIVITY
IS EXPECTED TOMORROW...MAINLY IN THE AFTERNOON AND EARLY EVENING
HOURS. HOLDING OFF ON A FLASH FLOOD WATCH AS THE ACTIVITY WILL
ONCE AGAIN BE GENERALLY DISORGANIZED. HOWEVER...HAVE GONE WITH
MENTION OF LOCALLY HEAVY RAIN AS ANY OF THE STORMS HAVE THE POTENTIAL
TO PRODUCE HEAVY DOWNPOURS AND LOCALIZED FLASH FLOODING.

RAIN CHANCES WILL BEGIN TO DECREASE ON MONDAY AS AN UPPER RIDGE
BUILDS INTO THE REGION FROM THE EAST. HOWEVER...CAN STILL EXPECT
SCATTERED SHOWERS AND THUNDERSTORMS ACROSS THE NORTHWESTERN THIRD
OF THE CWA. THIS RIDGING PATTERN WILL ALLOW A GRADUAL WARMING TREND
THROUGH THE MIDDLE OF THE WEEK. GFS AND ECMWF GUIDANCE ARE PERSISTENT
WITH TRACKING THE UPPER RIDGE TO OUR NORTHWEST BY THE END OF THE
WEEK. SOUTHERLY SFC FLOW WILL KEEP GULF MOISTURE IN THE REGION
THROUGH THE WEEK. RAIN CHANCES RE-ENTER THE PICTURE BY THE END OF
THE WEEK AS A FRONTAL BOUNDARY DRIFTS INTO THE REGION SHOULD BE
ENOUGH TO GENERATE AT LEAST SCATTERED STORMS...PARTICULARLY ACROSS
THE EASTERN HALF OF SOUTH CENTRAL TEXAS.

&&

.PRELIMINARY POINT TEMPS/POPS...
AUSTIN CAMP MABRY              74  89  75  93  75 /  30  50  20  20  10
AUSTIN BERGSTROM INTL AIRPORT  72  90  73  94  72 /  30  50  20  20  10
DEL RIO INTL AIRPORT           73  90  76  92  75 /  50  60  60  40  30
SAN ANTONIO INTL AIRPORT       73  88  74  91  75 /  40  50  30  20  10

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

13/04

Hazardous weather outlook, Jul 28, 5:56 AM CDT, 16 hours 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
556 AM CDT SAT JUL 28 2007

TXZ171>173-183>194-202>209-217>225-228-291100-
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-
556 AM CDT SAT JUL 28 2007

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...TODAY AND TONIGHT...
LOCALLY HEAVY RAINFALL WILL BE POSSIBLE TODAY AND TONIGHT. AN
UPPER LEVEL DISTURBANCE WILL SUPPORT SCATTERED SHOWERS AND
THUNDERSTORMS...WITH SLOW STORM MOTIONS EXPECTED. LOCALLIZED AREAS
COULD SEE 1 TO 2 INCH RAINFALL AMOUNTS...WITH ISOLATED 3 INCH
AMOUNTS POSSIBLE.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. HOWEVER...LOCALLY
HEAVY RAINFALL REMAINS POSSIBLE FOR SUNDAY...AND A POTENTIAL FOR
MAINLY DAYTIME SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH
THE NEXT SEVERAL DAYS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED.

In the hours before

Local storm report, Jul 28, 4:52 PM CDT, 5 hours 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
452 PM CDT SAT JUL 28 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0445 PM     FLOOD            13 SE CAMP WOOD         29.54N 99.86W
07/28/2007                   UVALDE             TX   TRAINED SPOTTER

            HIGHWAY 1051 IS CLOSED DUE TO WATER OVER THE ROAD. THE
            DRY FRIO IS FLOODING. 0.75 INCHES OF RAINFALL IN 45
            MINUTES.

&&

PM

Local storm report, Jul 28, 5:47 PM CDT, 4 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
547 PM CDT SAT JUL 28 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0540 PM     FLOOD            UVALDE                  29.22N 99.78W
07/28/2007                   UVALDE             TX   LAW ENFORCEMENT

            HIGHWAY 55 NORTHWEST OF UVALDE IS CLOSED DUE TO WATER
            OVER THE ROAD AND HIGHWAY 481 SOUTHWEST OF TOWN IS CLOSED
            DUE TO WATER OVER THE ROAD.

&&

PM

Local storm report, Jul 28, 7:17 PM CDT, 3 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
717 PM CDT SAT JUL 28 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0707 PM     FLOOD            7 N VANDERPOOL          29.84N 99.55W
07/28/2007                   BANDERA            TX   EMERGENCY MNGR

            PARTS OF HIGHWAY 187 ARE UNDER WATER FROM THE SABINAL AND
            MEDINA RIVERS.

&&

PM

Local storm report, Jul 28, 8:44 PM CDT, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
844 PM CDT SAT JUL 28 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     HEAVY RAIN       CHEAPSIDE               29.28N 97.40W
07/28/2007  M0.00 INCH       GONZALES           TX   CO-OP OBSERVER

            COOP OBSERVER NEAR CHEAPSIDE MEASURED 3.61 INCHES FROM 6
            PM TO 8 PM.

&&

PM

Local storm report, Jul 28, 8:47 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
847 PM CDT SAT JUL 28 2007

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     HEAVY RAIN       CHEAPSIDE               29.28N 97.40W
07/28/2007  M3.61 INCH       GONZALES           TX   CO-OP OBSERVER

            CORRECTION...THE COOP OBSERVER HAD 3.61 INCHES FROM 6PM
            TO 8PM.

&&

PM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 10:40 PM CDT	Flash Flood Warning	EWX	Hays	3 hr
Jul 28, 11:15 PM CDT	Flash Flood Watch	EWX	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more	32 hr
Jul 29, 3:57 AM CDT	Flash Flood Warning	EWX	Edwards, Kinney, Val Verde	4 hr
Jul 29, 4:26 AM CDT	Flash Flood Warning	EWX	Frio, Medina	4 hr
Jul 29, 5:27 AM CDT	Flash Flood Warning	EWX	Uvalde	4 hr
Jul 29, 9:02 AM CDT	Flash Flood Warning	EWX	Zavala	4 hr
Jul 29, 9:50 AM CDT	River Flood Warning	EWX	Frio	4 days
Jul 29, 10:23 AM CDT	Flash Flood Warning	EWX	Frio	4 hr
Jul 29, 11:37 AM CDT	Flash Flood Warning	EWX	Kinney, Val Verde	4 hr
Jul 29, 12:19 PM CDT	Flash Flood Warning	EWX	Dimmit, Maverick	4 hr
Jul 29, 1:11 PM CDT	Flash Flood Warning	EWX	Zavala	4 hr
Jul 29, 6:59 PM CDT	Flash Flood Warning	EWX	Burnet, Williamson	2 hr

Nearby

Flash Flood Warnings in Texas, 2007 Every flash flood warning 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.