Alert archive / Texas / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 56, NWS Austin/San Antonio, TX

May 15, 2010Edwards County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at May 15, 2010, 12:15 AM CDT for Edwards County, Texas. It was in force for 45 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
May 15, 2010, 12:15 AM CDT (05:15 UTC)
Expired
May 15, 2010, 1:00 AM CDT
In force
45 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon

County Edwards County, TX

The radar

The Laughlin AFB radar (KDFX), 79 km from the middle of the area, began a volume at 05:16 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, 5.3 hours before the alert went out and 86 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 00:00Z on 2010-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2798 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2010-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 321 square meters per square second.193958Sfc1 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
2798 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
887 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
321 m²/s²
0-3 km storm-relative helicity
624 m²/s²
Significant tornado parameter
3.6
Supercell composite
23.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 14, 9:20 PM CDT, 2 hours 55 minutes earlier.

Area forecast discussion, May 14, 9:20 PM CDT, 2 hours 55 minutes before
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Hazardous weather outlook, May 14, 7:32 PM CDT, 4 hours 43 minutes before
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In the hours before

Special weather statement, May 14, 9:21 PM CDT, 2 hours 54 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
921 PM CDT FRI MAY 14 2010

TXZ183-184-150345-
EDWARDS-VAL VERDE-
921 PM CDT FRI MAY 14 2010

...SIGNIFICANT WEATHER ADVISORY FOR EXTREME NORTHERN VAL VERDE AND
NORTHWESTERN EDWARDS COUNTIES UNTIL 1045 PM CDT...

AT 918 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF STRONG THUNDERSTORM 7 MILES NORTHEAST OF SEGOVIA...OR 11
MILES EAST OF JUNCTION...MOVING SOUTHEASTWARD AT ABOUT 20 TO 30 MPH.

SMALL HAIL SIZE AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THESE
STORMS...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER
CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED
ROADWAYS.
Special weather statement, May 14, 10:38 PM CDT, 1 hour 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1038 PM CDT FRI MAY 14 2010

TXZ183-184-150430-
EDWARDS-VAL VERDE-
1038 PM CDT FRI MAY 14 2010

...SIGNIFICANT WEATHER ADVISORY FOR VAL VERDE AND WESTERN EDWARDS
COUNTIES UNTIL 1130 PM CDT...

AT 1030 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 9 MILES NORTHEAST OF JUNO...MOVING SOUTHEAST AT
30 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  FLOUR MILLS...
  VINEGARONE...
Special weather statement, May 14, 11:25 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1125 PM CDT FRI MAY 14 2010

TXZ183-184-150530-
EDWARDS-VAL VERDE-
1125 PM CDT FRI MAY 14 2010

...SIGNIFICANT WEATHER ADVISORY FOR VAL VERDE AND WESTERN EDWARDS
COUNTIES UNTIL 1230 AM CDT...

AT 1121 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 10 MILES NORTHWEST OF FLOUR MILLS...OR 13 MILES
NORTH OF LOMA ALTA...MOVING SOUTHEAST AT 25 MPH.

HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  LOMA ALTA...
  FLOUR MILLS...
  CARTA VALLEY...
  PAFFORD CROSSING...
  VINEGARONE...

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER
CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED
ROADWAYS.
Local storm report, May 14, 11:28 PM CDT, 47 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1128 PM CDT FRI MAY 14 2010

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

1115 PM     HAIL             ROCKSPRINGS             30.02N 100.21W
05/14/2010  E0.25 INCH       EDWARDS            TX   PUBLIC

            SMALL HAIL AND WIND GUSTS TO 30 MPH

&&

EVENT NUMBER EWX1000256

SBS
Special weather statement, May 14, 11:29 PM CDT, 46 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1129 PM CDT FRI MAY 14 2010

TXZ217-228-150530-
DIMMIT-MAVERICK-
1129 PM CDT FRI MAY 14 2010

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN DIMMIT AND MAVERICK
COUNTIES UNTIL 1230 AM CDT...

AT 1127 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES SOUTHEAST OF EL INDIO...MOVING NORTHEAST
AT 15 MPH.

HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 40 MPH ARE
EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT
DANGEROUS LIGHTNING.

LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
  FARIAS LAKE...

THE HEAVY RAIN MAY FLOOD LOW LYING AREAS SUCH AS DITCHES...LOW WATER
CROSSINGS AND UNDERPASSES. DO NOT DRIVE YOUR VEHICLE ACROSS FLOODED
ROADWAYS.
Local storm report, May 14, 11:45 PM CDT, 30 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1145 PM CDT FRI MAY 14 2010

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

0600 PM     FLASH FLOOD      1 N LACOSTE             29.32N  98.81W
05/14/2010                   BEXAR              TX   LAW ENFORCEMENT

            FM 471 AT MEDINA RIVER CLOSED DUE TO HIGH WATER

&&

EVENT NUMBER EWX1000257

SBS

The office that day

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

IssuedProductOfficeCountiesLasted
May 14, 9:36 PM CDTRiver Flood WarningEWXFrio3 days
May 14, 11:22 PM CDTRiver Flood WarningEWXBexar3 hr
May 15, 1:09 AM CDTFlash Flood WatchEWXAtascosa, Bandera, Bexar, Blanco, Comal, Frio and 10 more5 hr
May 15, 1:43 AM CDTAreal Flood AdvisoryEWXBandera, Bastrop, Bexar, Blanco, Caldwell, Comal and 10 more107 min
May 15, 1:54 AM CDTSevere Thunderstorm WarningEWXKinney, Uvalde51 min
May 15, 2:22 AM CDTFlash Flood WarningEWXBastrop, Bexar, Caldwell, Comal, Guadalupe, Hays and 1 more3 hr
May 15, 3:20 AM CDTFlash Flood WarningEWXBandera, Frio, Medina3 hr
May 15, 3:30 AM CDTFlash Flood WarningEWXAtascosa, Fayette, Gonzales, Wilson3 hr
May 15, 4:55 AM CDTAreal Flood AdvisoryEWXDeWitt, Karnes, Lavaca2 hr
May 15, 9:48 AM CDTRiver Flood WarningEWXBexar24 hr
May 15, 6:06 PM CDTSevere Thunderstorm WarningEWXLlano39 min
May 15, 6:20 PM CDTTornado WarningEWXLlano25 min
May 15, 6:43 PM CDTSevere Thunderstorm WarningEWXBurnet, Llano20 min

Nearby

Severe Thunderstorm Warnings in Texas, 2010Every severe thunderstorm 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.