Alert archive / Texas / Tornado Warnings in 2010

Tornado Warning 10, NWS Fort Worth, TX

May 10, 2010Grayson County, Texas

NWS Fort Worth, TX issued this tornado warning at May 10, 2010, 7:04 PM CDT for Grayson County, Texas. It was in force for 42 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 10, 2010, 7:04 PM CDT (00:04 UTC)
Expired: May 10, 2010, 7:46 PM CDT
In force: 42 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon

County Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 131 km from the middle of the area, began a volume at 00:05 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 10, 4:27 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.1 hours before the alert went out and 105 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: 2602 J/kg
Mixed-layer CIN: -216 J/kg
Mixed-layer LCL: 1245 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 255 m²/s²
0-3 km storm-relative helicity: 396 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 10.1

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 10, 3:41 PM CDT, 3 hours 23 minutes earlier.

Area forecast discussion, May 10, 3:41 PM CDT, 3 hours 23 minutes before

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Hazardous weather outlook, May 10, 6:52 PM CDT, 12 minutes before

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In the hours before

Special weather statement, May 10, 7:01 PM CDT, 3 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
701 PM CDT MON MAY 10 2010

TXZ100-115-110030-
YOUNG TX-STEPHENS TX-
701 PM CDT MON MAY 10 2010

...SIGNIFICANT WEATHER ADVISORY FOR...
  NORTHERN STEPHENS COUNTY
  SOUTHWESTERN YOUNG COUNTY

AT 701 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 16 MILES SOUTHEAST OF THROCKMORTON...MOVING EAST
AT 45 MPH.

CITIES IN THE PATH OF THIS STORM INCLUDE CRYSTAL FALLS.

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

LAT...LON 3295 9910 3296 9909 3296 9896 3306 9896
      3307 9857 3284 9857 3287 9911
TIME...MOT...LOC 0001Z 271DEG 38KT 3296 9905

85/NH

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 7:01 PM CDT	Special Weather Statement	FWD	Stephens	29 min
May 10, 8:03 PM CDT	Special Weather Statement	FWD	Palo Pinto, Parker	27 min
May 10, 8:07 PM CDT	Special Weather Statement	FWD	Stephens	23 min
May 10, 8:13 PM CDT	Special Weather Statement	FWD	Fannin	32 min
May 10, 8:35 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Montague	55 min
May 10, 8:38 PM CDT	Special Weather Statement	FWD	Stephens	37 min
May 10, 9:07 PM CDT	Special Weather Statement	FWD	Eastland	38 min
May 10, 9:19 PM CDT	Severe Thunderstorm Warning	FWD	Grayson	56 min
May 10, 9:51 PM CDT	Severe Thunderstorm Warning	FWD	Fannin, Lamar	54 min
May 10, 9:52 PM CDT	Tornado Warning	FWD	Grayson	38 min
May 10, 10:18 PM CDT	Tornado Warning	FWD	Fannin, Grayson	57 min
May 10, 10:29 PM CDT	Tornado Warning	FWD	Lamar	31 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.