Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 12, NWS Fort Worth, TX

March 17, 2018Comanche County, Eastland County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Mar 17, 2018, 2:53 PM CDT for Comanche County, Eastland County, Texas. It was in force for 40 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: Mar 17, 2018, 2:53 PM CDT (19:53 UTC)
Expired: Mar 17, 2018, 3:33 PM CDT
In force: 40 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Hail: 1.75 in
Wind: 65.0 mph

Counties Comanche County, TX, Eastland County, TX

The radar

The Dyess AFB radar (KDYX), 69 km from the middle of the area, began a volume at 19:55 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
Mar 17, 2:20 PM CDT	Severe Thunderstorm Watch	SPC	9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 7.9 hours before the alert went out and 153 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2469 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: -22 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 Fort Worth, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 17, 2:22 PM CDT, 31 minutes earlier.

Area forecast discussion, Mar 17, 2:22 PM CDT, 31 minutes before

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Hazardous weather outlook, Mar 17, 4:13 AM CDT, 10 hours 40 minutes before

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In the hours before

Special weather statement, Mar 17, 2:51 PM CDT, 2 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
251 PM CDT SAT MAR 17 2018

TXZ142-172030-
Mills TX-
251 PM CDT SAT MAR 17 2018

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL MILLS COUNTY UNTIL 330 PM
CDT...

At 251 PM CDT, Doppler radar was tracking a strong thunderstorm
cluster 11 miles northeast of Skeeterville, or 16 miles north of
Richland Springs, moving northeast at 35 mph.

Dime size hail and winds in excess of 40 mph will be possible with
these storms.

Locations impacted include...
Goldthwaite and Mullin.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
central Texas.

LAT...LON 3150 9896 3161 9878 3169 9876 3172 9849
      3168 9846 3131 9863 3132 9865 3135 9864
      3137 9865 3134 9870 3135 9871 3139 9869
      3143 9873 3139 9877 3141 9878 3141 9885
      3144 9887 3143 9891 3146 9894 3147 9898
TIME...MOT...LOC 1951Z 211DEG 29KT 3149 9885

24

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 17, 2:51 PM CDT	Special Weather Statement	FWD	Mills	39 min
Mar 17, 3:20 PM CDT	Special Weather Statement	FWD	Stephens	25 min
Mar 17, 3:36 PM CDT	Special Weather Statement	FWD	Coryell, Hamilton, Lampasas	54 min
Mar 17, 4:09 PM CDT	Special Weather Statement	FWD	Hood	66 min
Mar 17, 4:23 PM CDT	Severe Thunderstorm Warning	FWD	Coryell	67 min
Mar 17, 4:28 PM CDT	Special Weather Statement	FWD	Johnson	32 min
Mar 17, 4:56 PM CDT	Severe Thunderstorm Warning	FWD	Bell, Coryell, McLennan	64 min
Mar 17, 5:12 PM CDT	Special Weather Statement	FWD	Ellis	48 min
Mar 17, 5:43 PM CDT	Severe Thunderstorm Warning	FWD	Bell, Falls, McLennan	62 min
Mar 17, 6:04 PM CDT	Special Weather Statement	FWD	Lampasas, Mills	56 min
Mar 17, 6:31 PM CDT	Severe Thunderstorm Warning	FWD	Lampasas	59 min
Mar 17, 6:39 PM CDT	Severe Thunderstorm Warning	FWD	Falls	36 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

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.