Alert archive / Texas / Flash Flood Warnings in 2009
Flash Flood Warning 31, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 11, 2009, 10:53 AM CDT for Frio County, 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 11, 2009, 10:53 AM CDT (15:53 UTC)
- Expired
- Sep 11, 2009, 1:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Frio County, TX
The radar
The Laughlin AFB radar (KDFX), 120 km from the middle of the area, began a volume at 15:52 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 11, 11:00 AM CDT | FLASH FLOOD | 3 Sw Moore, TX | US HWY 57 CLOSED FROM I35 WEST TO HWY 140 DUE TO FLOODING |
| Sep 11, 1:30 PM CDT | FLASH FLOOD | Frio Town, TX | HWY 140 FROM FRIO TOWN TO PEARSALL TO ATASCOSA CO LINE CLOSED DUE TO FLOODING |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this flash flood warning; the first came 7 minutes after it went out.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 3.9 hours before the alert went out and 175 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
- 805 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 547 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 111553
FFWEWX
TXC163-111845-
/O.NEW.KEWX.FF.W.0031.090911T1553Z-090911T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1053 AM CDT FRI SEP 11 2009
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHEASTERN FRIO COUNTY...
* UNTIL 145 PM CDT.
* AT 1047 AM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING FROM
SHOWERS AND THUNDERSTORMS LOCATED OVER NORTHEASTERN FRIO COUNTY.
THESE STORMS WERE MOVING SLOWLY TO THE NORTH AND NORTHWEST AT 5
TO 10 MPH. RAINFALL RATES WERE ESTIMATED AT 1 TO 2 INCHES AN HOUR.
A COCORAHS OBSERVER LOCATED 8 MILES NORTH NORTHWEST OF PEARSALL
HAS REPORTED 4.62 INCHES OF RAINFALL IN THE PAST 2.5 HOURS.
* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BLUFF...
SCHATTEL...PEARSALL...MOORE...FRIO TOWN AND BIG FOOT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2892 9939 2908 9941 2908 9881 2901 9880
2866 9881
$$2 follow-up statements
000
WGUS74 KEWX 111706
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1206 PM CDT FRI SEP 11 2009
TXC163-111845-
/O.CON.KEWX.FF.W.0031.000000T0000Z-090911T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRIO TX-
1206 PM CDT FRI SEP 11 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR
NORTHEASTERN FRIO COUNTY...
AT 1156 AM CDT...SLOW MOVING SHOWERS AND THUNDERSTORMS PRODUCING HEAVY
RAINFALL CONTINUE ACROSS THE NORTHEAST HALF OF FRIO COUNTY. RAINFALL
RATES WERE ESTIMATED AT 1 TO 3 INCHES AN HOUR.
THE FRIO COUNTY SHERIFF OFFICE HAS REPORTED CLOSURES ON HIGHWAY 57
BETWEEN INTERSTATE 10 AND FM 140 DUE TO WATER ON THE ROADWAY.
LOCATIONS IN THE WARNING AREA INCLUDE SCHATTEL...MOORE...FRIO TOWN
AND BIG FOOT.
LAT...LON 2892 9939 2908 9941 2908 9881 2902 9881
2866 9881
$$000
WGUS74 KEWX 111746
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1246 PM CDT FRI SEP 11 2009
TXC163-111845-
/O.CON.KEWX.FF.W.0031.000000T0000Z-090911T1845Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
FRIO TX-
1246 PM CDT FRI SEP 11 2009
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM CDT FOR
NORTHEASTERN FRIO COUNTY...
AT 1241 PM CDT...SHOWERS AND THUNDERSTORMS PRODUCING VERY HEAVY RAIN
CONTINUED ACROSS THE WARNED AREA. THE HEAVIEST RAINFALL WAS OCCURRING
SOUTHEAST OF PEARSALL ALONG FM 1582 SOUTHEAST OF HIGHWAY 85 WHERE
RAINFALL RATES WERE ESTIMATED AT 3 INCHES AN HOUR
LOCATIONS IN THE WARNING AREA INCLUDE SCHATTEL...MOORE...FRIO TOWN
AND BIG FOOT.
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
DONT DROWN.
&&
LAT...LON 2892 9939 2908 9941 2908 9881 2902 9881
2866 9881
$$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 Sep 11, 6:34 AM CDT, 4 hours 19 minutes earlier.
Area forecast discussion, Sep 11, 6:34 AM CDT, 4 hours 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 634 AM CDT FRI SEP 11 2009 .AVIATION... A SLOW MOVING UPPER LEVEL LOW PRESSURE SYSTEM OVER CENTRAL TX WILL KEEP DEEP TROPICAL MOISTURE OVER S CENTRAL TX FOR THE NEXT 24 HORUS. PATCHY VARIABLE IFR-MVFR CIGS THIS MORNING WILL GRADUALLY BECOME VFR THIS AFTERNOON...HOWEVER SCT TO NUMEROUS SHRA/TSRA WILL MOVE NW ACROSS THE AREA. CIGS AND VSBY WILL BE LOWER IN THE SHRA/TSRA WITH BRIEF LIFR CONDITIONS POSSIBLE. VARIABLE N AND NE WINDS LESS THAN 10 KNOTS. && .PREV DISCUSSION... /ISSUED 424 AM CDT FRI SEP 11 2009/ ..ISOLATED MINOR FLOODING POSSIBLE TODAY... DISCUSSION... THIS MORNING THE UPPER LOW WAS PARKED OVER THE EDWARDS PLATEAU AND WESTERN HILL COUNTRY. THIS FEATURE WILL WOBBLE BACK AND FORTH BUT WILL GENERALLY STAY PERCHED ACROSS SOUTH CENTRAL TEXAS TODAY AND INTO SATURDAY. THIS WILL LEAD TO CONTINUED WIDESPREAD SHOWERS AND THUNDERSTORMS ACROSS THE REGION. MOST AREAS WILL RECEIVE AN AVERAGE OF ONE HALF TO ONE INCH OF RAIN THROUGHOUT THE DAY. HOWEVER...LOCALLY HEAVY RAINFALL IS EXPECTED AND COULD SEE TOTALS UPWARDS OF TWO TO FOUR INCHES BEFORE TONIGHT. ISOLATED MINOR FLOODING ISSUES ARE THUS A CONCERN. HOWEVER...GIVEN THAT FLOODING WILL BE ISOLATED AND THAT THERE IS NO DEFINING BOUNDARY TO PINPOINT WHERE THE HEAVY RAINS WILL FALL...WILL HOLD OFF ON FLASH FLOOD WATCH FOR THE TIME BEING. RAIN CHANCES WILL GRADUALLY DECREASE OVER THE WEEKEND AS THE UPPER LOW SHIFTS EASTWARD. THIS WILL ALLOW DRIER NORTHWEST FLOW ALOFT TO FILTER INTO THE REGION. RAIN CHANCES WILL STAY IN THE PICTURE THROUGH MONDAY AS A SURFACE LOW REMAINS DRAPED ACROSS THE MID TEXAS COAST AND GOOD MOISTURE AVAILABILITY REMAINS. HIGH TEMPERATURES TODAY THROUGH THE WEEKEND WILL BE BELOW SEASONAL NORMALS DUE TO EXPANSIVE CLOUD COVER AND PERIODS OF RAIN. WILL SEE A RETURN TO MID-SEPTEMBER NORMALS BY MID WEEK AS CONDITIONS DRY OUT. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 83 70 84 68 86 / 100 70 70 50 40 AUSTIN BERGSTROM INTL AIRPORT 84 69 83 68 86 / 100 70 70 50 40 NEW BRAUNFELS MUNI AIRPORT 83 69 85 67 87 / 100 60 60 50 40 BURNET MUNI AIRPORT 81 68 81 66 83 / 100 70 70 50 40 DEL RIO INTL AIRPORT 87 70 84 70 89 / 70 50 40 40 30 GEORGETOWN MUNI AIRPORT 83 69 79 66 84 / 100 70 70 50 40 HONDO MUNI AIRPORT 85 68 84 66 88 / 90 50 50 50 30 SAN MARCOS MUNI AIRPORT 83 69 84 67 86 / 100 70 70 50 40 LA GRANGE - FAYETTE REGIONAL 84 72 83 71 86 / 100 70 70 50 40 SAN ANTONIO INTL AIRPORT 84 70 84 69 87 / 100 60 60 50 40 STINSON MUNI AIRPORT 84 71 84 69 87 / 100 60 60 50 40 && .EWX WATCHES/WARNINGS/ADVISORIES... NONE. && 25/01
Hazardous weather outlook, Sep 11, 5:34 AM CDT, 5 hours 19 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 534 AM CDT FRI SEP 11 2009 TXZ171>173-183>194-202>209-217>225-228-121000- 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- 534 AM CDT FRI SEP 11 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE...TODAY AND TONIGHT... DEEP TROPICAL MOISTURE AND A SLOW MOVING UPPER LOW PRESSURE SYSTEM OVER CENTRAL TEXAS WILL CONTINUE TO PRODUCE SCATTERED TO WIDESPREAD SHOWERS AND THUNDERSTORMS OVER THE AREA. RAINFALL TOTALS WILL AVERAGE ONE HALF TO ONE INCH...WITH LOCALLY HEAVIER AMOUNTS OF 2 TO 4 INCHES. MINOR STREET FLOODING IS POSSIBLE ALONG WITH RISES ON SMALL CREEKS AND STREAMS. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WITH LOCALLY HEAVY OF 1 TO 3 INCHES RAIN SATURDAY. HOWEVER RAIN CHANCES WILL DECREASE FROM THE WEST SATURDAY NIGHT INTO SUNDAY AS THE UPPER LOW LIFTS NORTHEASTWARD AND THE ATMOSPHERE DRIES AND STABILIZES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 11, 12:49 AM CDT | Areal Flood Advisory | EWX | Burnet, Williamson | 116 min |
| Sep 11, 3:10 AM CDT | Areal Flood Advisory | EWX | Burnet, Williamson | 3 hr |
| Sep 11, 9:59 AM CDT | Flash Flood Watch | EWX | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 21 more | 33 hr |
| Sep 11, 11:28 AM CDT | Flash Flood Warning | EWX | Williamson | 3 hr |
| Sep 11, 12:00 PM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 2 hr |
| Sep 11, 1:02 PM CDT | Areal Flood Advisory | EWX | Fayette | 118 min |
| Sep 11, 1:13 PM CDT | Areal Flood Advisory | EWX | Gonzales | 2 hr |
| Sep 11, 1:34 PM CDT | Flash Flood Warning | EWX | Frio | 3 hr |
| Sep 11, 1:55 PM CDT | Flash Flood Warning | EWX | Travis, Williamson | 4 hr |
| Sep 11, 2:09 PM CDT | Areal Flood Advisory | EWX | Bastrop, Lee | 111 min |
| Sep 11, 2:50 PM CDT | Areal Flood Advisory | EWX | Llano | 115 min |
| Sep 11, 3:06 PM CDT | Areal Flood Advisory | EWX | DeWitt, Fayette, Gonzales, Lavaca | 114 min |
| Sep 11, 3:35 PM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Kendall | 115 min |
| Sep 11, 4:49 PM CDT | Flash Flood Warning | EWX | Comal, Guadalupe | 3 hr |
| Sep 11, 5:37 PM CDT | Areal Flood Advisory | EWX | Atascosa, Bexar, Comal, Guadalupe, Wilson | 113 min |
| Sep 11, 5:42 PM CDT | Flash Flood Warning | EWX | Williamson | 93 min |
Nearby
Flash Flood Warnings in Texas, 2009Every flash flood warning in 2009
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.