Alert archive / Texas / Tornado Warnings in 1993

Tornado Warning 35, NWS Fort Worth, TX

September 13, 1993Collin County, Grayson County, Texas

NWS Fort Worth, TX issued this tornado warning at Sep 13, 1993, 11:10 AM CDT for Collin County, Grayson County, Texas. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Sep 13, 1993, 11:10 AM CDT (16:10 UTC)
Expired: Sep 13, 1993, 12:15 PM CDT
In force: 65 min
Issued by: NWS Fort Worth, TX
Area: Whole counties

Counties Collin County, TX, Grayson County, TX

What was reported inside it

Time	Report	Where	Remark
Sep 13, 11:10 AM CDT	Tornado F0	Collin, TX	A brief tornado was reported in open country by spotters between Weston and Anna.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Norman, OK (KOUN), launched 12:00Z, 4.2 hours before the alert went out and 214 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: 1199 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 583 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 239 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 8.2

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Local storm report, Sep 13, 7:09 AM CDT, 4 hours 1 minute before

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Special weather statement, Sep 13, 9:39 AM CDT, 1 hour 31 minutes before

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Special weather statement, Sep 13, 9:40 AM CDT, 1 hour 30 minutes before

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Special weather statement, Sep 13, 9:44 AM CDT, 1 hour 26 minutes before

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Special weather statement, Sep 13, 10:31 AM CDT, 39 minutes before

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Special weather statement, Sep 13, 10:33 AM CDT, 37 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 8:03 AM CDT	Severe Thunderstorm Warning	FWD	Dallas, Tarrant	57 min
Sep 13, 8:39 AM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton	66 min
Sep 13, 9:06 AM CDT	Tornado Warning	FWD	Tarrant	26 min
Sep 13, 9:25 AM CDT	Tornado Warning	FWD	Collin	50 min
Sep 13, 9:57 AM CDT	Tornado Warning	FWD	Denton	63 min
Sep 13, 10:07 AM CDT	Tornado Warning	FWD	Cooke, Grayson	68 min
Sep 13, 10:14 AM CDT	Tornado Warning	FWD	Collin	31 min
Sep 13, 11:23 AM CDT	Tornado Warning	FWD	Fannin	52 min
Sep 13, 2:20 PM CDT	Severe Thunderstorm Warning	FWD	McLennan	55 min

Nearby

Tornado Warnings in Texas, 1993 Every tornado warning in 1993 Tornadoes in 1993

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.