Alert archive / Texas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 252, NWS Lubbock, TX

September 18, 2017Lynn County, Texas

NWS Lubbock, TX issued this severe thunderstorm warning at Sep 18, 2017, 6:34 PM CDT for Lynn County, Texas. It was in force for 41 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 18, 2017, 6:34 PM CDT (23:34 UTC)
Expired: Sep 18, 2017, 7:15 PM CDT
In force: 41 min
Issued by: NWS Lubbock, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Lynn County, TX

The radar

The Lubbock radar (KLBB), 63 km from the middle of the area, began a volume at 23:36 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 nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 11.6 hours before the alert went out and 131 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: 401 J/kg
Mixed-layer CIN: -270 J/kg
Mixed-layer LCL: 1354 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 212 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted.

559 
WUUS54 KLUB 182334
SVRLUB
TXC305-190015-
/O.NEW.KLUB.SV.W.0252.170918T2334Z-170919T0015Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Lubbock TX
634 PM CDT MON SEP 18 2017

The National Weather Service in Lubbock Texas has issued a

* Severe Thunderstorm Warning for...
  Southern Lynn County in northwestern Texas...

* Until 715 PM CDT

* At 633 PM CDT, a severe thunderstorm was located near O'donnell, or
  13 miles southwest of Tahoka, moving northeast at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees. 

* Locations impacted include...
  Tahoka, O'donnell, Grassland and New Moore. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3310 10206 3327 10161 3312 10156 3296 10156
      3296 10201
TIME...MOT...LOC 2333Z 244DEG 15KT 3299 10190 

HAIL...1.00IN
WIND...60MPH
 
$$

23

2 follow-up statements

453 
WWUS54 KLUB 182354
SVSLUB

Severe Weather Statement
National Weather Service Lubbock TX
654 PM CDT MON SEP 18 2017

TXC305-190015-
/O.CON.KLUB.SV.W.0252.000000T0000Z-170919T0015Z/
Lynn TX-
654 PM CDT MON SEP 18 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM CDT
FOR SOUTHEASTERN LYNN COUNTY...

At 653 PM CDT, a severe thunderstorm was located near O'donnell, or 9
miles south of Tahoka, moving east at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees. 

Locations impacted include...
O'Donnell and Grassland. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 3311 10190 3319 10183 3327 10161 3312 10156
      3296 10156 3296 10187
TIME...MOT...LOC 2353Z 254DEG 13KT 3302 10178 

HAIL...1.00IN
WIND...60MPH
 
$$

23

029 
WWUS54 KLUB 190009
SVSLUB

Severe Weather Statement
National Weather Service Lubbock TX
709 PM CDT MON SEP 18 2017

TXC305-190018-
/O.EXP.KLUB.SV.W.0252.000000T0000Z-170919T0015Z/
Lynn TX-
709 PM CDT MON SEP 18 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LYNN COUNTY WILL
EXPIRE AT 715 PM CDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However small hail,
gusty winds and heavy rain are still possible with this thunderstorm.

LAT...LON 3311 10190 3319 10183 3327 10161 3312 10156
      3296 10156 3296 10187
TIME...MOT...LOC 0008Z 254DEG 15KT 3301 10171 

$$

23

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, 8:58 PM CDT	Severe Thunderstorm Warning	LUB	Cottle, Motley	62 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

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.