Alert archive / Texas / Tornado Warnings in 2010

Tornado Warning 15, NWS Fort Worth, TX

May 20, 2010Ellis County, Texas

NWS Fort Worth, TX issued this tornado warning at May 20, 2010, 2:07 PM CDT for Ellis County, Texas. It was in force for 38 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 20, 2010, 2:07 PM CDT (19:07 UTC)
Expired: May 20, 2010, 2:45 PM CDT
In force: 38 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Ellis County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 54 km from the middle of the area, began a volume at 19:10 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 20, 11:57 AM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 7.1 hours before the alert went out and 71 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: 2918 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 646 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 212 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 2.2
Supercell composite: 10.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this tornado 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 tornado warning went out at May 20, 12:46 PM CDT, 1 hour 21 minutes earlier.

Area forecast discussion, May 20, 12:46 PM CDT, 1 hour 21 minutes before

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Hazardous weather outlook, May 20, 12:04 PM CDT, 2 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE FORT WORTH TX
1204 PM CDT THU MAY 20 2010

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211130-
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-
1204 PM CDT THU MAY 20 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A CHANCE OF THUNDERSTORMS ACROSS ALL OF NORTH TEXAS
TODAY. SOME OF THE STORMS MAY BE SEVERE...ESPECIALLY ALONG AND
SOUTHEAST OF A CISCO TO SHERMAN LINE. THE PRIMARY SEVERE WEATHER
HAZARDS WILL BE LARGE HAIL AND DAMAGING WINDS. AN ISOLATED TORNADO
THREAT ALSO EXISTS.  SOME OF THE STORMS WILL ALSO PRODUCE LOCALLY
HEAVY RAINFALL THAT MAY RESULT IN FLASH FLOODING. THUNDERSTORMS
WILL END FROM WEST TO EAST THIS EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE REQUESTED TODAY FOR AREAS ALONG AND
SOUTHEAST OF A CISCO TO SHERMAN LINE.

CAVANAUGH

In the hours before

Special weather statement, May 20, 11:21 AM CDT, 2 hours 46 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1121 AM CDT THU MAY 20 2010

TXZ094-105-201645-
FANNIN TX-HUNT TX-
1121 AM CDT THU MAY 20 2010

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHERN FANNIN COUNTY
  NORTHERN HUNT COUNTY

AT 1121 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 14 MILES NORTHWEST OF COMMERCE...MOVING EAST AT
30 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE BAILEY...CELESTE...LEONARD
AND WOLFE CITY.

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

LAT...LON 3356 9585 3332 9586 3320 9626 3345 9628
      3346 9628
TIME...MOT...LOC 1621Z 251DEG 27KT 3337 9606

DUNN

Special weather statement, May 20, 11:31 AM CDT, 2 hours 36 minutes before

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Special weather statement, May 20, 12:15 PM CDT, 1 hour 52 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1215 PM CDT THU MAY 20 2010

TXZ119-201745-
DALLAS TX-
1215 PM CDT THU MAY 20 2010

...SIGNIFICANT WEATHER ADVISORY FOR...
  CENTRAL DALLAS COUNTY

AT 1213 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM ALONG INTERSTATE 30 NEAR COCKRELL HILL...MOVING
EAST AT 15 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE COCKRELL HILL AND CENTRAL
DALLAS.

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

A TORNADO WATCH IS IN EFFECT FOR DALLAS COUNTY.

LAT...LON 3285 9681 3280 9654 3263 9662 3271 9702
      3285 9702
TIME...MOT...LOC 1713Z 277DEG 14KT 3278 9693

25

Special weather statement, May 20, 12:41 PM CDT, 1 hour 26 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1241 PM CDT THU MAY 20 2010

TXZ118-201815-
TARRANT TX-
1241 PM CDT THU MAY 20 2010

...SIGNIFICANT WEATHER ADVISORY FOR...
  SOUTHEASTERN TARRANT COUNTY

AT 1239 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM OVER FAR NORTHWEST ARLINGTON...MOVING EAST AT 25
MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE ARLINGTON...DALWORTHINGTON
GARDENS...AND PANTEGO.

HALF-INCH HAIL AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS
STORM.

OTHER STORMS ARE DEVELOPING ALONG THE FLANKING LINE...BETWEEN
KENNEDALE AND BURLESON.

A TORNADO WATCH IS IN EFFECT FOR TARRANT COUNTY.

LAT...LON 3279 9703 3255 9702 3255 9735 3275 9722
      3281 9703
TIME...MOT...LOC 1739Z 274DEG 21KT 3271 9711

25

Local storm report, May 20, 12:44 PM CDT, 1 hour 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
1244 PM CDT THU MAY 20 2010

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

1235 PM     TSTM WND DMG     7 NE COMO               33.14N  95.38W
05/20/2010                   HOPKINS            TX   LAW ENFORCEMENT

            DEBRIS REPORTED NEAR INTERSECTION OF I30 AND HWY 67.

The office that day

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

Issued	Product	Office	Counties	Lasted
May 20, 4:39 AM CDT	Special Weather Statement	FWD	Eastland	36 min
May 20, 5:05 AM CDT	Severe Thunderstorm Warning	FWD	Eastland, Erath	55 min
May 20, 5:55 AM CDT	Severe Thunderstorm Warning	FWD	Erath, Hood, Somervell	65 min
May 20, 6:49 AM CDT	Severe Thunderstorm Warning	FWD	Johnson	56 min
May 20, 7:53 AM CDT	Special Weather Statement	FWD	Ellis	37 min
May 20, 8:54 AM CDT	Flash Flood Warning	FWD	Lamar	111 min
May 20, 11:21 AM CDT	Special Weather Statement	FWD	Fannin	24 min
May 20, 11:31 AM CDT	Special Weather Statement	FWD	Tarrant	29 min
May 20, 12:15 PM CDT	Special Weather Statement	FWD	Dallas	30 min
May 20, 12:40 PM CDT	Severe Thunderstorm Warning	FWD	Hopkins	47 min
May 20, 12:41 PM CDT	Special Weather Statement	FWD	Tarrant	34 min
May 20, 12:51 PM CDT	Areal Flood Advisory	FWD	Hopkins, Hunt	3 hr
May 20, 12:51 PM CDT	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	54 min
May 20, 12:58 PM CDT	Tornado Warning	FWD	Hopkins	28 min
May 20, 1:03 PM CDT	Areal Flood Advisory	FWD	Dallas	3 hr
May 20, 1:41 PM CDT	Severe Thunderstorm Warning	FWD	Dallas	64 min
May 20, 2:06 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Kaufman	54 min
May 20, 2:43 PM CDT	Tornado Warning	FWD	Ellis	47 min
May 20, 2:54 PM CDT	Severe Thunderstorm Warning	FWD	Henderson, Kaufman	66 min
May 20, 3:23 PM CDT	Areal Flood Advisory	FWD	Ellis	112 min
May 20, 3:28 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Navarro	62 min
May 20, 3:45 PM CDT	Tornado Warning	FWD	Ellis, Navarro	45 min
May 20, 3:55 PM CDT	Severe Thunderstorm Warning	FWD	Henderson	65 min
May 20, 4:25 PM CDT	Tornado Warning	FWD	Navarro	38 min
May 20, 4:28 PM CDT	Severe Thunderstorm Warning	FWD	Ellis, Navarro	47 min
May 20, 5:00 PM CDT	Severe Thunderstorm Warning	FWD	Navarro	60 min
May 20, 5:00 PM CDT	Severe Thunderstorm Warning	FWD	Anderson, Henderson, Navarro	60 min
May 20, 5:11 PM CDT	Tornado Warning	FWD	Anderson, Freestone, Henderson, Navarro	49 min
May 20, 5:14 PM CDT	Severe Thunderstorm Warning	FWD	Ellis	46 min
May 20, 5:19 PM CDT	Tornado Warning	FWD	Freestone, Navarro	41 min
May 20, 5:38 PM CDT	Severe Thunderstorm Warning	FWD	Hill	52 min
May 20, 5:43 PM CDT	Tornado Warning	FWD	Anderson, Freestone, Navarro	47 min
May 20, 5:58 PM CDT	Severe Thunderstorm Warning	FWD	Navarro	62 min
May 20, 6:19 PM CDT	Severe Thunderstorm Warning	FWD	Bosque	56 min
May 20, 6:24 PM CDT	Severe Thunderstorm Warning	FWD	Anderson	46 min
May 20, 6:29 PM CDT	Severe Thunderstorm Warning	FWD	Hill	61 min
May 20, 6:40 PM CDT	Severe Thunderstorm Warning	FWD	Freestone, Limestone	65 min
May 20, 6:41 PM CDT	Tornado Warning	FWD	Hill, Limestone, Navarro	49 min
May 20, 6:47 PM CDT	Special Weather Statement	FWD	Hamilton	28 min
May 20, 6:58 PM CDT	Tornado Warning	FWD	Freestone	32 min

Nearby

Tornado Warnings in Texas, 2010 Every tornado warning in 2010 Tornadoes in 2010

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.