Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 91, NWS Austin/San Antonio, TX

September 25, 2016Edwards County, Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 25, 2016, 9:33 AM CDT for Edwards County, Val Verde County, Texas. It was in force for 2 hr. 1 report 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 25, 2016, 9:33 AM CDT (14:33 UTC)
Expired
Sep 25, 2016, 12:00 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

Counties Edwards County, TX, Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 77 km from the middle of the area, began a volume at 14:34 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.

What was reported inside it

TimeReportWhereRemark
Sep 25, 9:45 AM CDTFLASH FLOOD3 Wsw Rocksprings, TXROAD CLOSURE AT INTERSECTION OF RANCH ROAD 674 AND US HWY 377 DUE TO WATER OVER ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 2.6 hours before the alert went out and 61 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-pSkew-T log-p diagram, Del Rio, TX at 12:00Z on 2016-09-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 154 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2016-09-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 43 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
154 J/kg
Mixed-layer CIN
-144 J/kg
Mixed-layer LCL
946 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
43 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

383 
WGUS54 KEWX 251433
FFWEWX
TXC137-465-251700-
/O.NEW.KEWX.FF.W.0091.160925T1433Z-160925T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
933 AM CDT SUN SEP 25 2016

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHEASTERN VAL VERDE COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTHWESTERN EDWARDS COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL NOON CDT

* AT 931 AM CDT...DOPPLER RADAR INDICATED A COMPLEX OF SHOWERS AND
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA.
  PORTIONS OF THE WARNED AREA HAVE RECEIVED UP TO 5 INCHES OF RAIN
  IN THE LAST COUPLE HOURS AS ASSESSED FROM RADAR RAINFALL
  ESTIMATES. ADDITIONAL STORMS WILL BE MOVING INTO THE WARNED AREA
  FROM THE SOUTH WITH THE POTENTIAL TO PRODUCE RAINFALL RATES OF 1
  TO 2 INCHES PER HOUR. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  ROCKSPRINGS...LOMA ALTA...FLOUR MILLS...CARTA VALLEY...
  VINEGARONE AND DEVILS SHORES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

&&

LAT...LON 3007 10095 3008 10017 2962 10018 2962 10095

$$

BMW

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 25, 12:17 AM CDTAreal Flood AdvisoryEWXEdwards, Kinney, Maverick, Real, Uvalde, Val Verde3 hr
Sep 25, 3:22 AM CDTFlash Flood WatchEWXAtascosa, Bandera, Bexar, Comal, Dimmit, Edwards and 15 more35 hr
Sep 25, 8:50 AM CDTFlash Flood WarningEWXEdwards, Real3 hr
Sep 25, 9:13 AM CDTAreal Flood AdvisoryEWXKinney, Maverick, Val Verde3 hr
Sep 25, 10:27 AM CDTSpecial Weather StatementEWXUvalde48 min
Sep 25, 11:51 AM CDTFlash Flood WarningEWXBandera, Edwards, Kerr, Kinney, Real, Uvalde6 hr
Sep 25, 12:22 PM CDTAreal Flood AdvisoryEWXKinney, Uvalde3 hr
Sep 25, 12:55 PM CDTAreal Flood AdvisoryEWXBandera, Kerr, Medina3 hr
Sep 25, 2:19 PM CDTFlash Flood WarningEWXKinney4 hr
Sep 25, 2:21 PM CDTRiver Flood WarningEWXKinney, Uvalde15 hr
Sep 25, 3:21 PM CDTAreal Flood AdvisoryEWXBexar, Comal, Kendall3 hr
Sep 25, 5:04 PM CDTAreal Flood AdvisoryEWXBastrop, Fayette, Lee3 hr
Sep 25, 5:14 PM CDTRiver Flood WarningEWXUvalde25 hr
Sep 25, 5:14 PM CDTRiver Flood WarningEWXUvalde42 hr
Sep 25, 6:12 PM CDTSpecial Weather StatementEWXAtascosa33 min
Sep 25, 6:19 PM CDTAreal Flood AdvisoryEWXAtascosa, Bexar3 hr

Nearby

Flash Flood Warnings in Texas, 2016Every flash flood warning in 2016

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.