Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 251, NWS Lubbock, TX

September 17, 2017Cottle County, Motley County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Sep 17, 2017, 8:58 PM CDT for Cottle County, Motley County, Texas. It was in force for 62 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: Sep 17, 2017, 8:58 PM CDT (01:58 UTC)
Expired: Sep 17, 2017, 10:00 PM CDT
In force: 62 min
Issued by: NWS Lubbock, TX
Area: Storm-based polygon
Hail: 1.5 in
Wind: 60.0 mph

Counties Cottle County, TX, Motley County, TX

The radar

The Lubbock radar (KLBB), 128 km from the middle of the area, began a volume at 02:01 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
Sep 17, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Amarillo Airport, TX (KAMA), launched 00:00Z, 2.0 hours before the alert went out and 167 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: 680 J/kg
Mixed-layer CIN: -129 J/kg
Mixed-layer LCL: 1580 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: -35 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Lubbock, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Sep 17, 6:23 PM CDT, 2 hours 35 minutes earlier.

Area forecast discussion, Sep 17, 6:23 PM CDT, 2 hours 35 minutes before

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Hazardous weather outlook, Sep 17, 4:01 PM CDT, 4 hours 57 minutes before

Hazardous Weather Outlook...UPDATED
National Weather Service Lubbock TX
401 PM CDT Sun Sep 17 2017

TXZ021>044-182115-
Parmer-Castro-Swisher-Briscoe-Hall-Childress-Bailey-Lamb-Hale-
Floyd-Motley-Cottle-Cochran-Hockley-Lubbock-Crosby-Dickens-King-
Yoakum-Terry-Lynn-Garza-Kent-Stonewall-
401 PM CDT Sun Sep 17 2017

This Hazardous Weather Outlook is for the South Plains...Rolling
Plains and the far Southern Texas Panhandle.

.DAY ONE...This Afternoon and Tonight

Isolated to scattered severe thunderstorms are expected across
much of the outlook area through late this evening. The strongest
of storms will be capable of producing very large hail to around
baseball size, along with straight line winds near 70 mph. Some
flooding may also accompany this activity.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

The probability of hazardous weather is low at this time.

In the hours before

Local storm report, Sep 17, 5:28 PM CDT, 3 hours 30 minutes before

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Local storm report, Sep 17, 6:02 PM CDT, 2 hours 56 minutes before

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Local storm report, Sep 17, 7:03 PM CDT, 1 hour 55 minutes before

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Local storm report, Sep 17, 7:16 PM CDT, 1 hour 42 minutes before

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Local storm report, Sep 17, 7:18 PM CDT, 1 hour 40 minutes before

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Special weather statement, Sep 17, 8:26 PM CDT, 32 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 17, 7:17 PM CDT	Severe Thunderstorm Warning	LUB	Crosby, Dickens, Floyd, Motley	43 min
Sep 17, 8:26 PM CDT	Special Weather Statement	LUB	Cottle, Motley	34 min
Sep 17, 9:37 PM CDT	Special Weather Statement	LUB	Floyd, Motley	23 min
Sep 17, 10:01 PM CDT	Special Weather Statement	LUB	Hall, Motley	29 min
Sep 17, 10:29 PM CDT	Special Weather Statement	LUB	Childress, Cottle, Hall, Motley	31 min
Sep 17, 10:59 PM CDT	Special Weather Statement	LUB	Childress, Cottle	31 min
Sep 18, 6:34 PM CDT	Severe Thunderstorm Warning	LUB	Lynn	41 min

Nearby

Severe Thunderstorm Warnings in Texas, 2017 Every severe thunderstorm warning in 2017

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.