Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 111, NWS Fort Worth, TX

May 4, 2012Ellis County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at May 4, 2012, 9:32 PM CDT for Ellis County, Texas. It was in force for 31 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 4, 2012, 9:32 PM CDT (02:32 UTC)
Expired: May 4, 2012, 10:03 PM CDT
In force: 31 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Ellis County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 69 km from the middle of the area, began a volume at 02:33 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

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 4, 3:49 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 2.5 hours before the alert went out and 83 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: 2627 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 1899 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 7.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

553 
WUUS54 KFWD 050232
SVRFWD
TXC139-050315-
/O.NEW.KFWD.SV.W.0111.120505T0232Z-120505T0315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
932 PM CDT FRI MAY 4 2012

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ELLIS COUNTY IN NORTH CENTRAL TEXAS...

* UNTIL 1015 PM CDT

* AT 932 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED 7 MILES
  WEST OF BARDWELL...MOVING EAST AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  FERRIS AROUND 940 PM...
  BARDWELL AND PALMER AROUND 945 PM...
  ENNIS AROUND 950 PM...
  ALMA AROUND 1005 PM...

THIS WILL IMPACT THE FOLLOWING INTERSTATES...
I-35E BETWEEN MILE MARKERS 382 AND 410...
I-45 BETWEEN MILE MARKERS 253 AND 269.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO A STURDY SHELTER UNTIL THE STORM HAS
PASSED.

IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A STRONG BUILDING AND
STAY INSIDE...AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

&&

LAT...LON 3216 9672 3206 9694 3255 9695 3255 9653
      3253 9651 3245 9649 3241 9643 3235 9646
      3233 9639
TIME...MOT...LOC 0232Z 279DEG 24KT 3229 9678

$$

1 follow-up statement

465 
WWUS54 KFWD 050303
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1003 PM CDT FRI MAY 4 2012

TXC139-050313-
/O.CAN.KFWD.SV.W.0111.000000T0000Z-120505T0315Z/
ELLIS TX-
1003 PM CDT FRI MAY 4 2012

...THE SEVERE THUNDERSTORM WARNING FOR ELLIS COUNTY IS CANCELLED...

AT 1003 PM CDT THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING 
WEAKENED AND WAS NO LONGER SEVERE...THUS THE WARNING HAS BEEN 
CANCELLED.

LAT...LON 3216 9672 3206 9694 3255 9695 3255 9653
      3253 9651 3245 9649 3241 9643 3235 9646
      3233 9639
TIME...MOT...LOC 0303Z 279DEG 24KT 3226 9654

$$

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 4, 8:41 PM CDT, 51 minutes earlier.

Area forecast discussion, May 4, 8:41 PM CDT, 51 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE FORT WORTH TX
841 PM CDT FRI MAY 4 2012

.UPDATE...
HAVE ADDED PRECIP AFTER 1 AM/06Z TO FAR SOUTHEAST AND EAST
COUNTIES BASED ON EXTRAPOLATION OF CURRENT STORMS. DO NOT EXPECT
MUCH OF A SEVERE THREAT BY THEN. UPDATE ON THE WAY.   84

&&

.AVIATION...
/18Z TAFS/

VFR CONDITIONS GENERALLY PREVAIL ACROSS ALL OF NORTH TEXAS WITH
SOUTHERLY WINDS AROUND 15KTS. THERE IS A LINE OF ELEVATED
THUNDERSTORMS TO THE NORTHWEST OF THE METROPLEX EXTENDING FROM
NEAR BRECKENRIDGE UP TO BOWIE. THIS LINE IS NOT EXPECTED TO AFFECT
AREA AIRPORTS HOWEVER THERE IS A DISTURBANCE MOVING THROUGH THE
SOUTHERN PLAINS WHICH MAY HELP IGNITE MORE THUNDERSTORMS THROUGH
THE AFTERNOON. MUCH OF THIS NEW ACTIVITY IS EXPECTED TO BE ALONG
THE DRYLINE AND THERE IS SOME UNCERTAINTY AS TO HOW FAR EAST IT
WILL GET. FOR NOW...WILL MAINTAIN A VFR FORECAST AND MONITOR
CONVECTIVE TRENDS FOR POSSIBLE AMENDMENTS. OTHERWISE...MVFR CIGS
ARE EXPECTED TO DEVELOP AND MOVE NORTH OVERNIGHT BUT WILL KEEP
THEM CONFINED TO THE WACO AREA FOR THE EARLY MORNING HOURS.

DUNN

&&

.PREV UPDATE...
.UPDATE...
QUICK UPDATE TO EXTEND SEVERE WATCH ONE ROW OF COUNTIES EAST.
OTHERWISE...ONLY COSMETIC CHANGES TO FORECAST. 84

&&

.PRELIMINARY POINT TEMPS/POPS...
DALLAS-FT. WORTH, TX  72  92  74  92  69 /  30  10  10  10  30
WACO, TX              74  93  72  93  70 /  20  10  10  10  30
PARIS, TX             69  90  69  89  71 /  20  10  10  10  20
DENTON, TX            71  94  74  92  69 /  30  10  10  10  30
MCKINNEY, TX          72  92  73  92  70 /  20  10  10  10  30
DALLAS, TX            72  92  74  92  70 /  20  10  10  10  30
TERRELL, TX           70  91  72  91  70 /  20  10  10  10  30
CORSICANA, TX         70  91  72  92  71 /  20  10  10  10  30
TEMPLE, TX            72  93  72  93  70 /  20  10  10  10  30
MINERAL WELLS, TX     70  96  72  94  68 /  30  10  10  20  30

&&

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

&&

 /

Hazardous weather outlook, May 4, 8:11 PM CDT, 1 hour 21 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
811 PM CDT FRI MAY 4 2012

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-060115-
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-
811 PM CDT FRI MAY 4 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS THROUGH LATE EVENING ACROSS
MUCH OF NORTH TEXAS. THE BEST CHANCES WILL BE ALONG AND WEST OF
INTERSTATE 35. ANY STORMS THAT DEVELOP COULD BE SEVERE WITH VERY
LARGE HAIL AND DAMAGING WINDS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THERE IS A CHANCE OF THUNDERSTORMS ACROSS ALL OF NORTH TEXAS
SUNDAY EVENING THROUGH TUESDAY. SOME STORMS COULD BE SEVERE SUNDAY
EVENING INTO MONDAY. THE SEVERE WEATHER THREAT WILL DIMINISH BY
TUESDAY ACROSS THE REGION.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUESTED ACROSS PARTS OF NORTH TEXAS
THROUGH THE LATE EVENING.

In the hours before

Local storm report, May 4, 8:48 PM CDT, 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
848 PM CDT FRI MAY 04 2012

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

0847 PM     TSTM WND GST     ALVARADO                32.40N  97.22W
05/04/2012  E60 MPH          JOHNSON            TX   AMATEUR RADIO

Local storm report, May 4, 9:07 PM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
907 PM CDT FRI MAY 04 2012

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

0858 PM     TSTM WND GST     GAINESVILLE             33.63N  97.15W
05/04/2012  E60 MPH          COOKE              TX   FIRE DEPT/RESCUE

            FIRE DEPARTMENT REPORTED 60 MPH WIND GUST IN GAINESVILLE

Local storm report, May 4, 9:14 PM CDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
914 PM CDT FRI MAY 04 2012

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

0855 PM     HAIL             5 E GAINESVILLE         33.63N  97.06W
05/04/2012  E0.88 INCH       COOKE              TX   EMERGENCY MNGR

            5 MILES EAST OF GAINESVILLE.

Local storm report, May 4, 9:15 PM CDT, 17 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
915 PM CDT FRI MAY 04 2012

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

0907 PM     TSTM WND GST     MIDLOTHIAN              32.48N  96.98W
05/04/2012  E60 MPH          ELLIS              TX   TRAINED SPOTTER

            60 MPH WIND GUSTS AND POWER LINES BLOWN DOWN 2 SOUTHWEST
            OF MIDLOTHIAN

Local storm report, May 4, 9:18 PM CDT, 14 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
918 PM CDT FRI MAY 04 2012

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

0842 PM     TSTM WND DMG     SIVELLS BEND            33.83N  97.25W
05/04/2012                   COOKE              TX   EMERGENCY MNGR

            SEVERAL TREES DOWN...SIZE UNKNOWN. DAMAGE TO TIN ROOF.

Special weather statement, May 4, 9:26 PM CDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
926 PM CDT FRI MAY 4 2012

TXZ118-119-133-050300-
DALLAS TX-JOHNSON TX-TARRANT TX-
926 PM CDT FRI MAY 4 2012

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHWESTERN DALLAS COUNTY
  NORTHWESTERN JOHNSON COUNTY
  SOUTHERN TARRANT COUNTY

AT 923 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED AN
AREA OF STRONG AND GUSTY WINDS BEHIND AN EXITING LINE OF
THUNDERSTORMS. WIND GUSTS BEHIND THIS LINE OF STORMS MAY TEMPORARILY
REACH 50 MPH.

CITIES THAT MAY EXPERIENCE THE STRONG AND GUSTY WINDS INCLUDE
ARLINGTON...BURLESON...CEDAR HILL...CLEBURNE...CROWLEY...
DUNCANVILLE...EDGECLIFF...EVERMAN...FOREST HILL...GODLEY...
JOSHUA...KEENE...KENNEDALE...MANSFIELD...RENDON...CEDAR HILL
STATE PARK AND CLEBURNE STATE PARK.

LAT...LON 3257 9685 3256 9708 3243 9709 3240 9718
      3220 9761 3254 9761 3256 9759 3255 9756
      3259 9755 3275 9735 3275 9698
TIME...MOT...LOC 0223Z 180DEG 0KT 3285 9705

The office that day

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

Issued	Product	Office	Counties	Lasted
May 4, 7:09 PM CDT	Tornado Warning	FWD	Hood	22 min
May 4, 7:11 PM CDT	Severe Thunderstorm Warning	FWD	Eastland	38 min
May 4, 7:37 PM CDT	Special Weather Statement	FWD	Montague	23 min
May 4, 7:41 PM CDT	Special Weather Statement	FWD	Parker	34 min
May 4, 7:44 PM CDT	Severe Thunderstorm Warning	FWD	Palo Pinto, Parker	19 min
May 4, 7:54 PM CDT	Severe Thunderstorm Warning	FWD	Hood, Johnson, Parker, Somervell, Tarrant	66 min
May 4, 8:00 PM CDT	Severe Thunderstorm Warning	FWD	Comanche	60 min
May 4, 8:02 PM CDT	Severe Thunderstorm Warning	FWD	Montague	55 min
May 4, 8:25 PM CDT	Severe Thunderstorm Warning	FWD	Erath	50 min
May 4, 8:33 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Ellis, Hill, Johnson	57 min
May 4, 8:38 PM CDT	Severe Thunderstorm Warning	FWD	Cooke	67 min
May 4, 9:02 PM CDT	Severe Thunderstorm Warning	FWD	Comanche, Mills	58 min
May 4, 9:04 PM CDT	Severe Thunderstorm Warning	FWD	Ellis	26 min
May 4, 9:07 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Cooke, Denton, Grayson	52 min
May 4, 9:12 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Hamilton	63 min
May 4, 9:26 PM CDT	Special Weather Statement	FWD	Johnson	34 min
May 4, 9:33 PM CDT	Tornado Warning	FWD	Mills	27 min
May 4, 10:02 PM CDT	Severe Thunderstorm Warning	FWD	Hamilton	28 min
May 4, 10:04 PM CDT	Special Weather Statement	FWD	Collin, Denton, Grayson	26 min
May 4, 10:20 PM CDT	High Wind Warning	FWD	Ellis, Johnson	40 min
May 4, 10:22 PM CDT	Special Weather Statement	FWD	Rockwall	23 min
May 4, 10:24 PM CDT	Special Weather Statement	FWD	McLennan	36 min
May 4, 10:33 PM CDT	Severe Thunderstorm Warning	FWD	Coryell, Hamilton	57 min
May 4, 11:14 PM CDT	Severe Thunderstorm Warning	FWD	Freestone, Navarro	38 min
May 4, 11:17 PM CDT	Special Weather Statement	FWD	Lamar	28 min
May 5, 12:52 AM CDT	Special Weather Statement	FWD	Bell	23 min
May 5, 12:59 AM CDT	Special Weather Statement	FWD	Henderson, Navarro	31 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning in 2012

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.