Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 204, NWS Fort Worth, TX

April 26, 2011Lamar County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 26, 2011, 7:51 PM CDT for Lamar County, Texas. It was in force for 54 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: Apr 26, 2011, 7:51 PM CDT (00:51 UTC)
Expired: Apr 26, 2011, 8:45 PM CDT
In force: 54 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Lamar County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 202 km from the middle of the area, began a volume at 00:51 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.

Issued	Product	Office	Lasted
Apr 26, 1:44 PM CDT	Tornado Watch PDS	SPC	10 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.9 hours before the alert went out and 185 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: 1466 J/kg
Mixed-layer CIN: -154 J/kg
Mixed-layer LCL: 1066 m above ground
0-6 km bulk shear: 83 kt
0-1 km storm-relative helicity: 65 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.1

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 26, 7:19 PM CDT, 32 minutes earlier.

Area forecast discussion, Apr 26, 7:19 PM CDT, 32 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
719 PM CDT TUE APR 26 2011

.AVIATION...
SEVERE THUNDERSTORM PASSED VERY NEAR ACT DURING THE PAST
HOUR...LOOKS LIKE POTENTIAL IS STILL THERE FOR SOME REDEVELOPMENT
THERE JUST E OF DRYLINE DURING THE NEXT FEW HOURS. LEFT VCTS IN
TAFS THERE AND ALL BUT AFW FOR THE EVENING...THOUGH THREAT IS
LOOKING LESS AND LESS FOR TARRANT COUNTY TERMINALS. ALSO KEPT
TEMPO GROUPS IN AT DALLAS LOVE AS IT IS THE EASTERN-MOST SITE AND
IS GETTING CLOSE CALLS FROM ACTIVITY TO THE SOUTH AND EAST.

WINDS ARE DIFFICULT GIVEN THE POSITION OF THE SURFACE LOW. ITS
EXACT MOVEMENT WILL DETERMINE VELOCITIES AT METROPLEX SITES. RIGHT
NOW HAVE GONE WITH PERSISTENT N-NE WINDS WITH THE THINKING BEING
THAT THE LOW WILL PASS JUST SOUTH OF TARRANT/DALLAS
COUNTIES...WITH A SWITCH-AROUND TO THE WEST LATE TONIGHT. MAIN
FRONTAL PUSH SHOULD ARRIVE TOMORROW MORNING AND WILL BRING GUSTY
NORTHWEST WINDS AREAWIDE.

30

&&

.PREV DISCUSSION... /ISSUED 215 PM CDT TUE APR 26 2011/
PARTICULARLY DANGEROUS SITUATION TODAY AND THIS EVENING...WITH
ALL ELEMENTS IN PLACE FOR LARGE HAIL...TORNADOES...DAMAGING WINDS
INTERSTATE 35 CORRIDOR AND EAST. CAPE VALUES IN WARM SECTOR ARE
OVER 4000 JOULES...AND 0-1 KM HELICITY VALUES NEAR FRONT ARE
ABOVE 300. AS CYCLOGENESIS OCCURS TODAY...WARM FRONT SHOULD
RETREAT NORTHWARD AND DRY LINE SHOULD PUSH EAST. TRIPLE POINT
INITIALLY NEAR BOSQUE COUNTY SHOULD PUSH NORTH ACROSS THE
METROPLEX. BEST SPOT FOR INITIAL CONVECTION IS NEAR TRIPLE POINT
SOUTH OF METROPLEX. STORM MOTION IS NORTHEAST...WITH RIGHT MOVING
SUPERCELLS MOVING EAST NORTHEAST. THIS WOULD KEEP THEM IN THE
WARM SECTOR AND ALLOW FOR LONG TRACK TORNADOES AND/OR WIDESPREAD
HAIL.

BY EARLY MORNING COLD FRONT SWEEPS ACROSS THE AREA AND PRECIP
SHOULD BE LIMITED TO THE NORTHEAST BY SUNRISE...ENDING SHORTLY
THEREAFTER. NO CHANGES FOR REST OF THE WEEK WITH NEXT SYSTEM
SATURDAY INTO SUNDAY.   84

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  60  71  53  78  59 /  30   5   5   5   5
WACO, TX              66  79  52  82  58 /  20   5   5   5   5
PARIS, TX             63  68  48  75  54 /  60  20   5   5   5
DENTON, TX            57  70  48  78  58 /  30   5   5   5   5
MCKINNEY, TX          61  70  49  78  56 /  50  10   5   5   5
DALLAS, TX            63  72  53  77  60 /  40   5   5   5   5
TERRELL, TX           64  72  51  77  57 /  50  10   5   5   5
CORSICANA, TX         67  78  54  78  58 /  30   5   5   5   5
TEMPLE, TX            65  81  53  82  57 /  20   5   5   5   5
MINERAL WELLS, TX     58  73  50  78  58 /  10   5   5   5   5

&&

.FWD WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

30/05

Hazardous weather outlook, Apr 26, 1:55 PM CDT, 5 hours 56 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE FORT WORTH TX
155 PM CDT TUE APR 26 2011

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-271100-
MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN-
HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS-
ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL-
JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO-
FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE-
LEON-MILAM-ROBERTSON-
155 PM CDT TUE APR 26 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

TORNADO WATCH IN EFFECT FOR MUCH OF NORTH TEXAS UNTIL 10 PM.

THUNDERSTORMS ARE LIKELY TODAY AND TONIGHT ALONG AND EAST OF A
LINE FROM LAMPASAS TO WEATHERFORD TO BOWIE. SEVERE THUNDERSTORMS
ARE LIKELY THIS AFTERNOON AND TONIGHT...ESPECIALLY ALONG AND EAST
OF THE INTERSTATE 35 CORRIDOR. LARGE HAIL...DAMAGING DOWNBURST
WINDS...AND TORNADOES WILL ALL BE POSSIBLE.

ELEVATED FIRE WEATHER CONDITIONS ARE EXPECTED THIS AFTERNOON
SOUTHWEST OF A CISCO TO MERIDIAN TO GATESVILLE LINE.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY.

A FEW THUNDERSTORMS MAY LINGER WEDNESDAY MORNING ACROSS THE FAR
NORTHEASTERN COUNTIES OF NORTH TEXAS.

ELEVATED FIRE WEATHER CONDITIONS ARE LIKELY WEDNESDAY AFTERNOON
ACROSS THE SOUTHWEST HALF OF NORTH TEXAS.

A CHANCE FOR THUNDERSTORMS RETURNS TO NORTH TEXAS SATURDAY
AFTERNOON THROUGH SUNDAY AFTERNOON.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS LIKELY ALONG AND EAST OF THE INTERSTATE 35
CORRIDOR TODAY AND TONIGHT. MORE LIMITED SPOTTER ACTIVATION MAY BE
REQUESTED WEST OF THE INTERSTATE 35 CORRIDOR.

In the hours before

Local storm report, Apr 26, 6:53 PM CDT, 58 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
653 PM CDT TUE APR 26 2011

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

0652 PM     HAIL             BLOSSOM                 33.67N  95.38W
04/26/2011  E1.75 INCH       LAMAR              TX   AMATEUR RADIO

            GOLFBALL SIZE HAIL REPORTED IN BLOSSOM

Local storm report, Apr 26, 6:55 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
655 PM CDT TUE APR 26 2011

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

0655 PM     HAIL             MART                    31.53N  96.83W
04/26/2011  E1.25 INCH       MCLENNAN           TX   EMERGENCY MNGR

Local storm report, Apr 26, 6:59 PM CDT, 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
659 PM CDT TUE APR 26 2011

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

0657 PM     TSTM WND GST     WACO                    31.55N  97.15W
04/26/2011  E70 MPH          MCLENNAN           TX   TRAINED SPOTTER

            REPORTED IN EASTERN MCLENNAN COUNTY

Local storm report, Apr 26, 7:08 PM CDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
708 PM CDT TUE APR 26 2011

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

0705 PM     TSTM WND DMG     AXTELL                  31.67N  96.97W
04/26/2011                   MCLENNAN           TX   TRAINED SPOTTER

            POWER LINES DOWN EASTERN MCLENNAN & WESTERN LIMESTONE
            COUNTY

Local storm report, Apr 26, 7:09 PM CDT, 42 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
709 PM CDT TUE APR 26 2011

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

0655 PM     HAIL             PARIS                   33.65N  95.53W
04/26/2011  E1.25 INCH       LAMAR              TX   TRAINED SPOTTER

            HALF DOLLAR SIZE HAIL REPORTED IN THE CITY OF PARIS.

Local storm report, Apr 26, 7:45 PM CDT, 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
745 PM CDT TUE APR 26 2011

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

0740 PM     TSTM WND DMG     GROESBECK               31.53N  96.52W
04/26/2011                   LIMESTONE          TX   BROADCAST MEDIA

            PART OF A ROOF BLOWN OFF HWY 165 AND HWY 14

The office that day

Everything else NWS Fort Worth, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 26, 7:08 PM CDT	Severe Thunderstorm Warning	FWD	Hill, McLennan, Navarro	67 min
Apr 26, 7:11 PM CDT	Tornado Warning	FWD	Falls, Limestone	49 min
Apr 26, 7:12 PM CDT	Tornado Warning	FWD	Freestone, Navarro	48 min
Apr 26, 7:43 PM CDT	Tornado Warning	FWD	Freestone, Hill, Limestone, Navarro	47 min
Apr 26, 7:46 PM CDT	Tornado Warning	FWD	Hill, Limestone, McLennan	44 min
Apr 26, 7:49 PM CDT	Tornado Warning	FWD	Freestone, Leon, Limestone	41 min
Apr 26, 7:51 PM CDT	Tornado Warning	FWD	Anderson, Freestone, Henderson, Navarro	39 min
Apr 26, 8:06 PM CDT	Tornado Warning	FWD	Freestone, Limestone	39 min
Apr 26, 8:12 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hill, Limestone, McLennan	63 min
Apr 26, 8:17 PM CDT	Tornado Warning	FWD	McLennan	43 min
Apr 26, 8:27 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Ellis	36 min
Apr 26, 8:29 PM CDT	Tornado Warning	FWD	Freestone, Limestone	46 min
Apr 26, 8:35 PM CDT	Tornado Warning	FWD	McLennan	25 min
Apr 26, 8:42 PM CDT	Tornado Warning	FWD	Anderson	48 min
Apr 26, 8:57 PM CDT	Tornado Warning	FWD	McLennan	48 min
Apr 26, 9:07 PM CDT	Tornado Warning	FWD	Freestone, Leon	53 min
Apr 26, 9:10 PM CDT	Tornado Warning	FWD	Limestone	50 min
Apr 26, 9:20 PM CDT	Tornado Warning	FWD	Falls	40 min
Apr 26, 9:28 PM CDT	Severe Thunderstorm Warning	FWD	Hunt, Kaufman	35 min
Apr 26, 9:43 PM CDT	Severe Thunderstorm Warning	FWD	McLennan	21 min
Apr 26, 9:48 PM CDT	Tornado Warning	FWD	Leon	42 min
Apr 26, 9:51 PM CDT	Severe Thunderstorm Warning	FWD	Anderson	54 min
Apr 26, 9:54 PM CDT	Severe Thunderstorm Warning	FWD	Hopkins, Rains	37 min
Apr 26, 9:56 PM CDT	Tornado Warning	FWD	Leon, Limestone, Robertson	49 min
Apr 26, 9:59 PM CDT	Severe Thunderstorm Warning	FWD	Falls	38 min
Apr 26, 10:03 PM CDT	Special Weather Statement	FWD	Freestone	27 min
Apr 26, 10:17 PM CDT	Severe Thunderstorm Warning	FWD	Delta, Hopkins	27 min
Apr 26, 10:27 PM CDT	Severe Thunderstorm Warning	FWD	Leon	48 min
Apr 26, 10:41 PM CDT	Severe Thunderstorm Warning	FWD	Limestone	34 min
Apr 26, 10:41 PM CDT	Tornado Warning	FWD	Leon, Robertson	49 min
Apr 26, 10:49 PM CDT	Special Weather Statement	FWD	Falls	26 min
Apr 26, 11:11 PM CDT	Severe Thunderstorm Warning	FWD	Leon, Limestone, Robertson	41 min
Apr 26, 11:20 PM CDT	Severe Thunderstorm Warning	FWD	Leon	55 min
Apr 26, 11:38 PM CDT	Tornado Warning	FWD	Leon	33 min
Apr 27, 4:20 AM CDT	Fire Weather Watch	FWD	Bell, Bosque, Comanche, Cooke, Coryell, Denton and 20 more	35 hr

Nearby

Severe Thunderstorm Warnings in Texas, 2011 Every 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.