Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 310, NWS Fort Worth, TX

December 19, 2012Dallas County, Ellis County, Kaufman County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Dec 19, 2012, 9:22 PM CST for Dallas County, Ellis County, Kaufman County, Texas. It was in force for 53 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Dec 19, 2012, 9:22 PM CST (03:22 UTC)
Expired: Dec 19, 2012, 10:15 PM CST
In force: 53 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

Counties Dallas County, TX, Ellis County, TX, Kaufman County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 85 km from the middle of the area, began a volume at 03:26 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.

What was reported inside it

Time	Report	Where	Remark
Dec 19, 9:55 PM CST	TSTM WND GST 68	Kaufman, TX	ESTIMATED 65 TO 70 MPH WINDS IN KAUFMAN BETWEEN 950 AND 10 PM
Dec 19, 9:56 PM CST	HAIL 1	Kaufman, TX	DIME TO QUARTER SIZED HAIL IN KAUFMAN

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 3.4 hours before the alert went out and 89 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: 211 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 1492 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 240 m²/s²
0-3 km storm-relative helicity: 233 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 5.2

Open this sounding in Storm Lab

The text

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

621 
WUUS54 KFWD 200322
SVRFWD
TXC113-139-257-200415-
/O.NEW.KFWD.SV.W.0310.121220T0322Z-121220T0415Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE FORT WORTH TX
922 PM CST WED DEC 19 2012

THE NATIONAL WEATHER SERVICE IN FORT WORTH HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN DALLAS COUNTY IN NORTH CENTRAL TEXAS...
  NORTHEASTERN ELLIS COUNTY IN NORTH CENTRAL TEXAS...
  KAUFMAN COUNTY IN NORTH CENTRAL TEXAS...

* UNTIL 1015 PM CST

* AT 922 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 65 MPH. THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM MESQUITE TO 4 MILES WEST OF
  PALMER...MOVING EAST AT 45 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  SEAGOVILLE AROUND 930 PM...
  FORNEY AND COMBINE AROUND 935 PM...
  CRANDALL AROUND 940 PM...
  COTTONWOOD AROUND 945 PM...
  TERRELL...KAUFMAN AND GRAYS PRAIRIE AROUND 950 PM...
  KEMP AROUND 1000 PM...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM THURSDAY MORNING FOR
NORTHEASTERN TEXAS.

&&

LAT...LON 3236 9608 3236 9644 3235 9646 3234 9643
      3233 9691 3279 9670 3282 9652 3281 9630
      3284 9630 3284 9608
TIME...MOT...LOC 0322Z 265DEG 40KT 3279 9662 3243 9672

$$


CAVANAUGH

2 follow-up statements

484 
WWUS54 KFWD 200342
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
942 PM CST WED DEC 19 2012

TXC113-200352-
/O.CAN.KFWD.SV.W.0310.000000T0000Z-121220T0415Z/
DALLAS TX-
942 PM CST WED DEC 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN DALLAS COUNTY IS
CANCELLED...

THE THUNDERSTORM THAT PROMPTED THE WARNING HAS MOVED EAST OUT OF 
DALLAS COUNTY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CST THURSDAY MORNING
FOR NORTHEASTERN TEXAS.

LAT...LON 3236 9608 3236 9644 3235 9646 3234 9643
      3234 9672 3246 9663 3252 9655 3255 9652
      3266 9647 3282 9646 3281 9630 3284 9630
      3284 9608
TIME...MOT...LOC 0342Z 273DEG 40KT 3274 9631 3237 9654

$$

TXC139-257-200415-
/O.CON.KFWD.SV.W.0310.000000T0000Z-121220T0415Z/
ELLIS TX-KAUFMAN TX-
942 PM CST WED DEC 19 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1015 PM CST
FOR KAUFMAN AND NORTHEASTERN ELLIS COUNTIES...

AT 942 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 65 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM LAWRENCE TO 4 MILES NORTHEAST OF
ENNIS...MOVING EAST AT 45 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
TERRELL...ROSSER...POST OAK BEND CITY...COTTONWOOD...OAK 
RIDGE...KAUFMAN...GRAYS PRAIRIE...OAK GROVE...KEMP AND MABANK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

A TORNADO WATCH REMAINS IN EFFECT UNTIL 200 AM CST THURSDAY MORNING
FOR NORTHEASTERN TEXAS.

&&

LAT...LON 3236 9608 3236 9644 3235 9646 3234 9643
      3234 9672 3246 9663 3252 9655 3255 9652
      3266 9647 3282 9646 3281 9630 3284 9630
      3284 9608
TIME...MOT...LOC 0342Z 273DEG 40KT 3274 9631 3237 9654

$$


CAVANAUGH

212 
WWUS54 KFWD 200418
SVSFWD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1018 PM CST WED DEC 19 2012

TXC139-257-200426-
/O.EXP.KFWD.SV.W.0310.000000T0000Z-121220T0415Z/
ELLIS TX-KAUFMAN TX-
1018 PM CST WED DEC 19 2012

...THE SEVERE THUNDERSTORM WARNING FOR KAUFMAN AND NORTHEASTERN ELLIS
COUNTIES EXPIRED AT 1015 PM CST...

A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR FAR SOUTHERN 
KAUFMAN COUNTY UNTIL 11 PM.

AT 1016 PM CST THE SEVERE THUNDERSTORM THAT PROMPTED THE WARNING
MOVED OUT OF THE AREA AND THE WARNING EXPIRED.

LAT...LON 3236 9608 3236 9644 3235 9646 3234 9643
      3234 9672 3246 9663 3252 9655 3255 9652
      3266 9647 3282 9646 3281 9630 3284 9630
      3284 9608
TIME...MOT...LOC 0342Z 273DEG 40KT 3274 9631 3237 9654

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 19, 7:14 PM CST	Special Weather Statement	FWD	Cooke, Grayson	31 min
Dec 19, 7:56 PM CST	Special Weather Statement	FWD	Grayson	34 min
Dec 19, 8:12 PM CST	Special Weather Statement	FWD	Hood, Johnson, Somervell	33 min
Dec 19, 8:30 PM CST	Severe Thunderstorm Warning	FWD	Johnson, Tarrant	30 min
Dec 19, 8:33 PM CST	Special Weather Statement	FWD	Collin	27 min
Dec 19, 9:00 PM CST	Severe Thunderstorm Warning	FWD	Dallas	30 min
Dec 19, 9:12 PM CST	Severe Thunderstorm Warning	FWD	Collin, Hunt, Rockwall	63 min
Dec 19, 9:49 PM CST	Severe Thunderstorm Warning	FWD	Delta, Hopkins, Lamar	56 min
Dec 19, 9:54 PM CST	Special Weather Statement	FWD	McLennan	36 min
Dec 19, 10:06 PM CST	Severe Thunderstorm Warning	FWD	Henderson, Kaufman, Navarro, Van Zandt	54 min
Dec 19, 10:07 PM CST	Severe Thunderstorm Warning	FWD	Rains, Van Zandt	43 min
Dec 19, 10:52 PM CST	Special Weather Statement	FWD	Freestone	23 min
Dec 19, 11:05 PM CST	Severe Thunderstorm Warning	FWD	Henderson	40 min
Dec 19, 11:12 PM CST	Severe Thunderstorm Warning	FWD	Anderson, Freestone	63 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.