Alert archive / Texas / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 283, NWS Fort Worth, TX

May 11, 2011Falls County, McLennan County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 11, 2011, 5:58 PM CDT for Falls County, McLennan County, Texas. It was in force for 62 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 11, 2011, 5:58 PM CDT (22:58 UTC)
Expired: May 11, 2011, 7:00 PM CDT
In force: 62 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Falls County, TX, McLennan County, TX

The radar

The Ft Hood radar (KGRK), 81 km from the middle of the area, began a volume at 22:58 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
May 11, 3:46 PM CDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.0 hours before the alert went out and 160 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: 1949 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 244 m²/s²
0-3 km storm-relative helicity: 274 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.8

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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at May 11, 3:58 PM CDT, 2 hours earlier.

Area forecast discussion, May 11, 3:58 PM CDT, 2 hours before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
358 PM CDT WED MAY 11 2011

.DISCUSSION...
FINDING ABUNDANT INSTABILITY...QUASI-LINEAR CONVECTION HAS SURGED
FAR EAST OF THE DRYLINE. SEVERE WINDS ALONG LEADING EDGE WILL BE
THE PRIMARY SEVERE HAZARD INTO THE EVENING HOURS. NEW SVR WATCH
THROUGH 03Z (10 PM CDT) REPLACES PREVIOUS WATCH.

UPPER LOW WILL MOVE SLOWLY EASTWARD ACROSS THE CENTRAL PLAINS.
WINDS ABOVE THE BOUNDARY LAYER WILL FINALLY VEER AND PUSH DRYLINE
INTO NW ZONES THURSDAY. THUNDERSTORM CHANCES WILL CONTINUE
THURSDAY...MAINLY SOUTHEAST. SEVERE THREAT WILL REMAIN.

FRONT FINALLY PUSHES THROUGH THURSDAY NIGHT AND FRIDAY MORNING.
PERSISTENT NW FLOW ALOFT WILL CONTINUE TO USHER IN ADDITIONAL COOL
AIR...KEEPING TEMPERATURES BELOW NORMAL INTO NEXT WEEK...WITH LOW
HUMIDITY.

25

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  68  86  61  80  55 /  30  20  20   5   5
WACO, TX              70  86  63  80  56 /  30  30  20   5   5
PARIS, TX             67  84  61  75  52 /  60  30  20  10   5
DENTON, TX            63  86  59  76  52 /  30  20  20   5   5
MCKINNEY, TX          63  85  59  75  51 /  30  20  20   5   5
DALLAS, TX            70  87  62  77  55 /  30  20  20   5   5
TERRELL, TX           69  84  62  77  54 /  60  20  20  10   5
CORSICANA, TX         70  84  64  78  56 /  50  30  20  10   5
TEMPLE, TX            70  84  64  80  55 /  30  30  30   5   5
MINERAL WELLS, TX     61  87  55  77  50 /  30  10  10   5   5

&&

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

&&

25/25

Hazardous weather outlook, May 11, 3:40 PM CDT, 2 hours 18 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
340 PM CDT WED MAY 11 2011

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-121200-
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-
340 PM CDT WED MAY 11 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THROUGH TONIGHT.
THERE IS A CHANCE OF THUNDERSTORMS ACROSS ALL OF NORTH TEXAS
THROUGH TONIGHT. SOME STORMS EAST OF A SHERMAN...DALLAS...
GOLDTHWAITE LINE WILL BE SEVERE THROUGH THIS EVENING...PRODUCING
DAMAGING WINDS AND LARGE HAIL. ISOLATED TORNADOES ARE ALSO
POSSIBLE.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
THUNDERSTORM CHANCES WILL CONTINUE ON THURSDAY WITH THE BEST
CHANCES ACROSS THE SOUTHEAST HALF OF THE REGION. LARGE HAIL AND
DAMAGING DOWNBURST WINDS WILL BE THE PRIMARY HAZARDS.
THUNDERSTORM CHANCES WILL DECREASE FROM NORTHWEST TO SOUTHEAST
THURSDAY NIGHT WITH THE PASSAGE OF A COLD FRONT.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS LIKELY THROUGH THIS EVENING MAINLY EAST OF
A SHERMAN...DALLAS...GOLDTHWAITE LINE.

In the hours before

Special weather statement, May 11, 4:43 PM CDT, 1 hour 15 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
443 PM CDT WED MAY 11 2011

TXZ156>158-112215-
LAMPASAS TX-BELL TX-CORYELL TX-
443 PM CDT WED MAY 11 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  WESTERN BELL COUNTY
  SOUTHERN CORYELL COUNTY
  SOUTHEASTERN LAMPASAS COUNTY

AT 443 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 11 MILES SOUTHWEST OF COPPERAS COVE...MOVING
NORTHEAST AT 35 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE COPPERAS COVE...FORT HOOD...
HARKER HEIGHTS...KILLEEN...LAMPASAS AND NOLANVILLE.

NICKEL-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
WEDNESDAY EVENING FOR EASTERN TEXAS.

LAT...LON 3144 9786 3128 9751 3086 9756 3093 9782
      3104 9791 3104 9828
TIME...MOT...LOC 2143Z 234DEG 30KT 3099 9800

Local storm report, May 11, 4:53 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
453 PM CDT WED MAY 11 2011

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

0245 PM     TSTM WND DMG     1 W WHITESBORO          33.65N  96.94W
05/11/2011                   GRAYSON            TX   BROADCAST MEDIA

            TRAILER HOME DAMAGED AND AUTOMOBILE OVERTURNED

Local storm report, May 11, 5:21 PM CDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
521 PM CDT WED MAY 11 2011

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

0520 PM     HAIL             FORT HOOD               31.10N  97.70W
05/11/2011  E1.00 INCH       BELL               TX   AMATEUR RADIO

            W SIDE OF FORT HOOD

Local storm report, May 11, 5:22 PM CDT, 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
522 PM CDT WED MAY 11 2011

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

0520 PM     TSTM WND GST     FORT HOOD               31.10N  97.70W
05/11/2011  E60 MPH          BELL               TX   AMATEUR RADIO

            W SIDE OF FORT HOOD

Special weather statement, May 11, 5:53 PM CDT, 5 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
553 PM CDT WED MAY 11 2011

TXZ159-112330-
MCLENNAN TX-
553 PM CDT WED MAY 11 2011

...SIGNIFICANT WEATHER ADVISORY FOR...
  MCLENNAN COUNTY

AT 553 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 11 MILES SOUTHWEST OF MCGREGOR...MOVING NORTHEAST
AT 30 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BELLMEAD...BEVERLY HILLS...
CRAWFORD...HALLSBURG...HEWITT...LACY-LAKEVIEW...LORENA...MCGREGOR...
MOODY...NORTHCREST...RIESEL...ROBINSON...WACO AND WOODWAY.

NICKEL-SIZED HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.

IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT
WEDNESDAY EVENING FOR EASTERN TEXAS.

LAT...LON 3179 9708 3149 9687 3126 9734 3148 9752
TIME...MOT...LOC 2253Z 239DEG 27KT 3132 9744

Local storm report, May 11, 5:57 PM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
557 PM CDT WED MAY 11 2011

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

0555 PM     TSTM WND GST     MOFFAT                  31.20N  97.47W
05/11/2011  E65 MPH          BELL               TX   AMATEUR RADIO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 8:15 PM CDT	Special Weather Statement	FWD	Johnson, Tarrant	30 min
May 10, 8:59 PM CDT	Special Weather Statement	FWD	Denton, Tarrant	61 min
May 10, 9:18 PM CDT	Special Weather Statement	FWD	Grayson	27 min
May 10, 9:40 PM CDT	Special Weather Statement	FWD	Grayson	35 min
May 10, 10:18 PM CDT	Special Weather Statement	FWD	Grayson	27 min
May 11, 11:08 AM CDT	Special Weather Statement	FWD	Eastland	52 min
May 11, 11:43 AM CDT	Severe Thunderstorm Warning	FWD	Eastland	62 min
May 11, 11:53 AM CDT	Severe Thunderstorm Warning	FWD	Stephens	52 min
May 11, 12:10 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto	65 min
May 11, 12:14 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	61 min
May 11, 12:17 PM CDT	Special Weather Statement	FWD	Jack, Young	28 min
May 11, 12:22 PM CDT	Severe Thunderstorm Warning	FWD	Erath	53 min
May 11, 12:28 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Young	62 min
May 11, 12:51 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Parker	54 min
May 11, 12:58 PM CDT	Severe Thunderstorm Warning	FWD	Erath, Hood	62 min
May 11, 12:58 PM CDT	Severe Thunderstorm Warning	FWD	Jack, Wise	62 min
May 11, 1:10 PM CDT	Areal Flood Advisory	FWD	Erath, Hood, Jack, Palo Pinto, Parker, Somervell and 1 more	3 hr
May 11, 1:18 PM CDT	Severe Thunderstorm Warning	FWD	Comanche, Mills	72 min
May 11, 1:19 PM CDT	Special Weather Statement	FWD	Denton, Ellis, Johnson, Tarrant	26 min
May 11, 1:25 PM CDT	Severe Thunderstorm Warning	FWD	Montague	69 min
May 11, 1:37 PM CDT	Special Weather Statement	FWD	Cooke, Grayson	38 min
May 11, 1:37 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Parker, Tarrant, Wise	68 min
May 11, 1:41 PM CDT	Special Weather Statement	FWD	Johnson, Somervell	34 min
May 11, 1:59 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Grayson	76 min
May 11, 2:06 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton, Mills	69 min
May 11, 2:16 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Dallas	74 min
May 11, 2:28 PM CDT	Severe Thunderstorm Warning	FWD	Comanche, Mills	32 min
May 11, 2:42 PM CDT	Severe Thunderstorm Warning	FWD	Grayson	33 min
May 11, 3:05 PM CDT	Severe Thunderstorm Warning	FWD	Fannin	70 min
May 11, 3:07 PM CDT	Special Weather Statement	FWD	Kaufman, Rockwall	23 min
May 11, 3:12 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton	48 min
May 11, 3:20 PM CDT	Special Weather Statement	FWD	Hunt	25 min
May 11, 3:29 PM CDT	Areal Flood Advisory	FWD	Bosque, Coryell, Hamilton, Lampasas, Mills	3 hr
May 11, 3:32 PM CDT	Special Weather Statement	FWD	Lamar	28 min
May 11, 3:43 PM CDT	Severe Thunderstorm Warning	FWD	Lamar	77 min
May 11, 3:57 PM CDT	Special Weather Statement	FWD	Bosque	33 min
May 11, 4:04 PM CDT	Special Weather Statement	FWD	Delta, Hopkins	26 min
May 11, 4:15 PM CDT	Flash Flood Warning	FWD	Hamilton, Mills	2 hr
May 11, 4:43 PM CDT	Special Weather Statement	FWD	Coryell	32 min
May 11, 4:51 PM CDT	Severe Thunderstorm Warning	FWD	Bell, Coryell, Lampasas	54 min
May 11, 5:23 PM CDT	Severe Thunderstorm Warning	FWD	Bell, Coryell	52 min
May 11, 5:41 PM CDT	Flash Flood Warning	FWD	Bell, Coryell	2 hr
May 11, 5:53 PM CDT	Special Weather Statement	FWD	McLennan	37 min
May 11, 6:23 PM CDT	Areal Flood Advisory	FWD	Ellis, Henderson, Kaufman, Navarro, Van Zandt	2 hr
May 11, 6:57 PM CDT	Flash Flood Warning	FWD	Falls, Limestone, McLennan	2 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.