Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 2, NWS Austin/San Antonio, TX

March 18, 2016Edwards County, Real County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Mar 18, 2016, 6:19 PM CDT for Edwards County, Real 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 outline as issued.

The facts

Issued: Mar 18, 2016, 6:19 PM CDT (23:19 UTC)
Expired: Mar 18, 2016, 9:15 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Edwards County, TX, Real County, TX

The radar

The Laughlin AFB radar (KDFX), 85 km from the middle of the area, began a volume at 23:21 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 (KDLF), launched 12:00Z, 11.3 hours before the alert went out and 111 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: 2117 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 542 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.2

Open this sounding in Storm Lab

The text

As transmitted.

124 
WGUS54 KEWX 182319
FFWEWX
TXC137-385-190215-
/O.NEW.KEWX.FF.W.0002.160318T2319Z-160319T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
619 PM CDT FRI MAR 18 2016

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL EDWARDS COUNTY IN SOUTH CENTRAL TEXAS...
  NORTHWESTERN REAL COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 915 PM CDT
    
* AT 616 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA...WHICH INCLUDES PORTIONS OF THE
  NUECES RIVER 10 TO 15 MILES UPSTREAM FROM BARKSDALE. UP TO TWO
  INCHES OF RAIN HAVE ALREADY FALLEN OVER NORTHERN REAL COUNTY AND
  THE EAST PRONG OF THE NUECES RIVER UPSTREAM FROM HACKBERRY. FLASH
  FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  VANCE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT
TO FLOODING WHEN WATER BEGINS RISING.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3007 9990 3007 9975 2993 9984 2978 9997
      2983 10009 3003 10001

$$

MO

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 18, 4:13 PM CDT	Special Weather Statement	EWX	Kerr	47 min
Mar 18, 4:20 PM CDT	Special Weather Statement	EWX	Real	40 min
Mar 18, 4:38 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kendall, Kerr	37 min
Mar 18, 4:42 PM CDT	Severe Thunderstorm Warning	EWX	Burnet	48 min
Mar 18, 4:59 PM CDT	Areal Flood Advisory	EWX	Gillespie, Kerr, Real	2 hr
Mar 18, 5:11 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Gillespie, Kendall, Kerr	64 min
Mar 18, 5:17 PM CDT	Special Weather Statement	EWX	Real	43 min
Mar 18, 5:17 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano, Travis	58 min
Mar 18, 5:50 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	85 min
Mar 18, 6:09 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Gillespie, Hays, Kendall	66 min
Mar 18, 6:13 PM CDT	Severe Thunderstorm Warning	EWX	Bandera, Edwards, Kerr, Real	62 min
Mar 18, 6:42 PM CDT	Special Weather Statement	EWX	Kendall	33 min
Mar 18, 6:42 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Llano, Travis	48 min
Mar 18, 6:49 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Comal, Guadalupe, Hays	56 min

Nearby

Flash Flood Warnings in Texas, 2016 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.