Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 124, NWS San Angelo, TX

June 20, 2011Throckmorton County, Texas

NWS San Angelo, TX issued this severe thunderstorm warning at Jun 20, 2011, 5:02 PM CDT for Throckmorton County, Texas. It was in force for 28 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
Jun 20, 2011, 5:02 PM CDT (22:02 UTC)
Expired
Jun 20, 2011, 5:30 PM CDT
In force
28 min
Issued by
NWS San Angelo, TX
Area
Storm-based polygon

County Throckmorton County, TX

The radar

The Dyess AFB radar (KDYX), 71 km from the middle of the area, began a volume at 22:02 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jun 20, 3:42 PM CDTSevere Thunderstorm Watch PDSSPC7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 10.0 hours before the alert went out and 183 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, Fort Worth, TX at 12:00Z on 2011-06-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1195 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, Fort Worth, TX at 12:00Z on 2011-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.19395878Sfc1 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
1195 J/kg
Mixed-layer CIN
-625 J/kg
Mixed-layer LCL
877 m above ground
0-6 km bulk shear
24 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 San Angelo, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 4:04 PM CDT, 58 minutes earlier.

Area forecast discussion, Jun 20, 4:04 PM CDT, 58 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN ANGELO TX
404 PM CDT MON JUN 20 2011

.SHORT TERM...
WV IMAGERY SHOWING A WELL DEFINED UPPER LOW OVER EASTERN
COLORADO...WITH A NEGATIVE TILT SHORTWAVE/MID LEVEL JET MAX
ROTATING NORTHEAST INTO THE CENTRAL PLAINS. ALSO...MID LEVEL WINDS
WERE INCREASING ACROSS OKLAHOMA INTO NORTH TEXAS. AT THE
SURFACE...A DRYLINE EXTENDED ALONG A VERNON TO SWEETWATER TO
SANDERSON LINE. THE 3KM HRRR INDICATES STORMS EXPLODING ACROSS
CENTRAL OKLAHOMA AND NORTH TEXAS BETWEEN 21Z AND 23Z...THEN
SCATTERED TSTMS DEVELOPING ACROSS THE NORTHERN 2/3 OF WEST CENTRAL
TEXAS AFTER 23Z THROUGH THIS EVENING. A FEW STORMS MAY BE SEVERE
DUE TO SBCAPES OF 2000 TO 2500 J/KG AND 0-6KM SHEAR OF 35 TO 40
KNOTS. THE MAIN THREAT WILL BE DAMAGING WINDS DUE TO DCAPES OF
1000 TO 1500 KG. ALSO...REAL INTENSE ELEVATED CORES MAY PRODUCE
ISOLATED LARGE HAIL.

FOR TUESDAY...WEAK COLD FRONT WILL MOVE SLOWLY SOUTH ACROSS THE
NORTHERN HALF OF WEST CENTRAL TEXAS. GOING WITH CHANCE POPS ACROSS
MUCH OF THE AREA BY TUESDAY AFTERNOON. A FEW STORMS MAY BE SEVERE
DUE TO SBCAPES OF 2000 TO 3000 J/KG AND 0-6KM SHEAR OF 35 TO 40
KNOTS. SLIGHTLY COOLER TEMPERATURES FOR TUESDAY...WITH HIGHS IN
THE MID 90S TO AROUND 100.

.LONG TERM...
POSSIBLE RAIN CHANCES FOR TUESDAY NIGHT LINGERING INTO WEDNESDAY
NIGHT.

THE COLD FRONT WILL STALL ACROSS THE CWA TUESDAY AFTERNOON...
REMAINING A FOCUS FOR CONVECTION TO DEVELOP WEDNESDAY NIGHT. ONE
NEGATIVE FACTOR WITH RESPECT TO RAIN CHANCES WILL BE A LACK OF A
WELL-DEFINED SHORTWAVE ALOFT IMPACTING THE AREA. HOWEVER...AS
COOLING ALOFT TAKES PLACE...VERY LITTLE CONVECTIVE INHIBITION WILL
BE IN PLACE TO IMPEDE UPWARD MOTION ALONG THE LOW LEVEL
CONVERGENCE OF THE FRONT. PRECIPITABLE WATER VALUES WILL RANGE
FROM 1 TO 1.5 INCHES ACROSS THE FRONTAL BOUNDARY...SO WE COULD SEE
SOME LOCALIZED RAINFALL TOTALS OF UP TO AN INCH. HOWEVER...MOST
AREAS AFFECTED BY THE RAINFALL WILL LIKELY SEE ONE HALF INCH OR
LESS. FRONTAL BOUNDARY PLACEMENT IS PROBLEMATIC AT THIS TIME...BUT
EXPECT THE FRONT TO BE AS FAR SOUTH AS THE CONCHO VALLEY AND
HEARTLAND AREAS. WE MAY SEE SOME LINGERING PRECIPITATION FROM
WEDNESDAY INTO WEDNESDAY NIGHT AS WELL SO HAVE KEPT THE SLIGHT
CHANCE POPS IN THE FORECAST. SHOULD THE AREA RECEIVE
RAINFALL...THERE WILL BE LITTLE IMPACT ON THE LONG TERM DROUGHT
CONDITIONS. THE AREA NEEDS SEVERAL INCHES OF RAINFALL TO MAKE A
SIGNIFICANT IMPACT ON THE CURRENT DROUGHT.

FOLLOWING THE POSSIBILITY OF RAINFALL THROUGH MIDWEEK...THE UPPER
LEVEL RIDGE WILL SET BACK UP OVER THE AREA BRINGING HOT SUMMER
TEMPERATURES BACK INTO THE FORECAST FROM THURSDAY THROUGH NEXT
WEEK.

&&

.FIRE WEATHER...
CRITICAL FIRE WEATHER CONDITIONS WILL CONTINUE THIS AFTERNOON AND
EVENING DUE TO A COMBINATION OF RH VALUES LESS THAN 20
PERCENT...SOUTH WINDS OF 15 TO 25 MPH AND EXTREME TO EXCEPTIONAL
DROUGHT CONDITIONS. ALSO...THERE ARE SEVERAL ON GOING WILDFIRES
ACROSS WEST CENTRAL TEXAS. A RED FLAG WARNING REMAINS IN EFFECT
UNTIL 10 PM FOR THE BIG COUNTRY...CONCHO VALLEY...HEARTLAND...AND
CROCKETT COUNTY. ALSO...ISOLATED TO SCATTERED THUNDERSTORMS
TONIGHT MAY PRODUCE STRONG AND ERRATIC WINDS NEAR WILDFIRES.
ALSO...ADDITIONAL LIGHTNING INDUCED WILDFIRES ARE POSSIBLE.

&&

.PRELIMINARY POINT TEMPS/POPS...
ABILENE 	 75  94  71  95  72 /  20  40  40  10  10
SAN ANGELO 	 78 100  72  98  73 /  10  30  40  20  10
JUNCTION 	 78  97  74  96  73 /  10  20  40  20  20

&&

.SJT WATCHES/WARNINGS/ADVISORIES...
LAKE WIND ADVISORY UNTIL 7 PM CDT THIS EVENING FOR THE FOLLOWING
ZONES: BROWN...COKE...COLEMAN...CONCHO...HASKELL...JONES...
NOLAN...RUNNELS...TAYLOR...TOM GREEN.

RED FLAG WARNING UNTIL 10 PM CDT THIS EVENING FOR THE FOLLOWING
ZONES: BROWN...CALLAHAN...COKE...COLEMAN...CONCHO...CROCKETT...
FISHER...HASKELL...IRION...JONES...MCCULLOCH...NOLAN...RUNNELS...
SAN SABA...SHACKELFORD...STERLING...TAYLOR...THROCKMORTON...TOM
GREEN.

&&

21/20
Hazardous weather outlook, Jun 20, 3:14 PM CDT, 1 hour 48 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SAN ANGELO TX
314 PM CDT MON JUN 20 2011

TXZ049-054-064>066-071>073-076>078-098-099-113-114-127-128-139-
140-154-155-168>170-212015-
FISHER-NOLAN-STERLING-COKE-RUNNELS-IRION-TOM GREEN-CONCHO-
CROCKETT-SCHLEICHER-SUTTON-HASKELL-THROCKMORTON-JONES-SHACKELFORD-
TAYLOR-CALLAHAN-COLEMAN-BROWN-MCCULLOCH-SAN SABA-MENARD-KIMBLE-
MASON-
314 PM CDT MON JUN 20 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL
TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A RED FLAG WARNING FOR CRITICAL FIRE DANGER IS IN EFFECT FOR MUCH
OF WEST CENTRAL TEXAS UNTIL 10 PM THIS EVENING. STRONG SOUTH
WINDS...VERY DRY AIR AND HOT TEMPERATURES WILL BRING DANGEROUS
FIRE WEATHER CONDITIONS. AVOID OUTSIDE ACTIVITIES THAT MAY PRODUCE
SPARKS AND DISPOSE OF CIGARETTES CAREFULLY.

ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE OVERNIGHT...MAINLY
ALONG AND NORTH OF A STERLING CITY TO BROWNWOOD LINE. THE MAIN
THREAT WILL BE DAMAGING WINDS. HAIL WILL ALSO BE POSSIBLE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS A CHANCE OF THUNDERSTORMS ACROSS WEST CENTRAL TEXAS
TUESDAY AND WEDNESDAY. A FEW STORMS COULD BECOME SEVERE. THE MAIN
THREATS WILL BE DAMAGING WINDS AND LARGE HAIL.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS EVENING IN THE BIG COUNTRY.

In the hours before

Local storm report, Jun 20, 11:17 AM CDT, 5 hours 45 minutes before
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Local storm report, Jun 20, 11:21 AM CDT, 5 hours 41 minutes before
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    <section class="card" role="status" aria-live="polite">
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      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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Local storm report, Jun 20, 12:16 PM CDT, 4 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
1216 PM CDT MON JUN 20 2011

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

1212 PM     WILDFIRE         10 NW GRAPE CREEK       31.68N 100.67W
06/20/2011  E1250 ACRE       TOM GREEN          TX   FOREST SERVICE

            THE WILSON RANCH FIRE IS BURNING APPROXIMATELY 10 MILES
            NORTHWEST OF GRAPE CREEK. THE FIRE IS ESTIMATED TO BE 50
            PERCENT CONTAINED AND APPROXIMATELY 1250 ACRES.

&&

EVENT NUMBER SJT1100210

SN
Local storm report, Jun 20, 3:13 PM CDT, 1 hour 49 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SAN ANGELO TX
313 PM CDT MON JUN 20 2011

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

0220 PM     WILDFIRE         11 E HASKELL            33.16N  99.54W
06/20/2011  E5000 ACRE       HASKELL            TX   FOREST SERVICE

            THE WEISE FIRE IS BURNING NEAR HIGHWAY 380
            APPROXIMATELY 11 MILES EAST OF HASKELL. THE FIRE IS
            CURRENTLY ESTIMATED TO BE 5000 ACRES.

&&

EVENT NUMBER SJT1100211

SN
Special weather statement, Jun 20, 4:58 PM CDT, 4 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE SAN ANGELO TX
458 PM CDT MON JUN 20 2011

TXZ099-202230-
THROCKMORTON TX-
458 PM CDT MON JUN 20 2011

...SIGNIFICANT WEATHER ADVISORY EFFECTIVE UNTIL 530 PM CDT FOR
THROCKMORTON COUNTY...

AT 455 PM CDT...A STRONG THUNDERSTORM WAS INDICATED BY NATIONAL
WEATHER SERVICE DOPPLER RADAR OVER NORTH CENTRAL THROCKMORTON
COUNTY...OR ABOUT 11 MILES NORTH OF THROCKMORTON...MOVING NORTHEAST
AT 45 MPH.

THE STRONG THUNDERSTORM WILL REMAIN OVER MAINLY RURAL AREAS OF...
  NORTHEASTERN THROCKMORTON COUNTY.

PEA SIZE HAIL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
HEAVY RAINFALL WILL CAUSE PONDING OF WATER ON AREA ROADWAYS...
ESPECIALLY THOSE IN POOR DRAINAGE AREAS. RESIDENTS ARE ENCOURAGED TO
MONITOR THE SITUATION CLOSELY AND BE PREPARED TO TAKE THE PROPER
ACTIONS SHOULD A WARNING BE ISSUED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1100 PM CDT
MONDAY EVENING FOR NORTH CENTRAL TEXAS.

The office that day

Everything else NWS San Angelo, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 10:55 PM CDTRed Flag WarningSJTBrown, Callahan, Coke, Coleman, Concho, Crockett and 13 more23 hr
Jun 20, 3:10 AM CDTLake Wind AdvisorySJTBrown, Coke, Coleman, Concho, Haskell, Jones and 4 more16 hr
Jun 20, 5:06 PM CDTSevere Thunderstorm WarningSJTThrockmorton39 min
Jun 20, 5:45 PM CDTSevere Thunderstorm WarningSJTThrockmorton15 min
Jun 20, 5:50 PM CDTSevere Thunderstorm WarningSJTThrockmorton40 min
Jun 20, 5:59 PM CDTSevere Thunderstorm WarningSJTThrockmorton46 min
Jun 20, 6:09 PM CDTTornado WarningSJTThrockmorton36 min

Nearby

Severe Thunderstorm Warnings in Texas, 2011Every severe thunderstorm warning in 2011

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.