Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 74, NWS Fort Worth, TX

April 13, 2018Cooke County, Grayson County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Apr 13, 2018, 3:56 PM CDT for Cooke County, Grayson County, Texas. It was in force for 64 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: Apr 13, 2018, 3:56 PM CDT (20:56 UTC)
Expired: Apr 13, 2018, 5:00 PM CDT
In force: 64 min
Issued by: NWS Fort Worth, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Cooke County, TX, Grayson County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 123 km from the middle of the area, began a volume at 20:59 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
Apr 13, 1:20 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 8.9 hours before the alert went out and 95 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: 731 J/kg
Mixed-layer CIN: -418 J/kg
Mixed-layer LCL: 788 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 189 m²/s²
0-3 km storm-relative helicity: 250 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 Apr 13, 3:30 PM CDT, 26 minutes earlier.

Area forecast discussion, Apr 13, 3:30 PM CDT, 26 minutes before

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Hazardous weather outlook, Apr 13, 2:41 PM CDT, 1 hour 15 minutes before

Hazardous Weather Outlook
National Weather Service Fort Worth TX
241 PM CDT Fri Apr 13 2018

TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-141200-
Montague-Cooke-Grayson-Fannin-Lamar-Young-Jack-Wise-Denton-Collin-
Hunt-Delta-Hopkins-Stephens-Palo Pinto-Parker-Tarrant-Dallas-
Rockwall-Kaufman-Van Zandt-Rains-Eastland-Erath-Hood-Somervell-
Johnson-Ellis-Henderson-Comanche-Mills-Hamilton-Bosque-Hill-Navarro-
Freestone-Anderson-Lampasas-Coryell-Bell-McLennan-Falls-Limestone-
Leon-Milam-Robertson-
241 PM CDT Fri Apr 13 2018

This Hazardous Weather Outlook is for North and Central Texas.

.DAY ONE...This Afternoon and Tonight.

Scattered thunderstorms will continue this afternoon and evening
along and east of a dryline. This feature will be generally around
I-35 and areas east through this evening. Some storms will be severe
with very large hail and damaging winds. There will also be a threat
for a tornado or two through the evening.

Gusty west winds behind the dryline will continue through this
evening. There will be a threat for rapidly spreading grass fires
west of the dryline. A Red Flag Warning is in effect through late
evening.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

There will be an elevated threat of grass fires west of I-35 on
Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will likely be needed this afternoon and evening.

Dunn

In the hours before

Special weather statement, Apr 13, 1:01 PM CDT, 2 hours 55 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
101 PM CDT FRI APR 13 2018

TXZ105>107-123-131830-
Hunt TX-Hopkins TX-Rains TX-Delta TX-
101 PM CDT FRI APR 13 2018

...SIGNIFICANT WEATHER ADVISORY FOR EASTERN HUNT...NORTHWESTERN
HOPKINS...NORTHWESTERN RAINS AND SOUTHWESTERN DELTA COUNTIES UNTIL
130 PM CDT...

At 100 PM CDT, Doppler radar was tracking a strong thunderstorm near
Campbell, or 7 miles southeast of Greenville, moving northeast at 55
mph.

Dime size hail will be possible with this storm.

Locations impacted include...
Greenville, Commerce, Cumby, Campbell, Cooper Lake Park South
Sulphur, Lone Oak, Tira and Neylandville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so closely monitor for additional
information or possible warnings from the National Weather Service.

&&

LAT...LON 3293 9594 3302 9613 3341 9589 3341 9587
      3342 9586 3328 9555
TIME...MOT...LOC 1800Z 212DEG 49KT 3305 9599

Godwin

Special weather statement, Apr 13, 1:10 PM CDT, 2 hours 46 minutes before

Special Weather Statement
National Weather Service Fort Worth TX
110 PM CDT FRI APR 13 2018

TXZ091-131845-
Montague TX-
110 PM CDT FRI APR 13 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL MONTAGUE COUNTY
UNTIL 145 PM CDT...

At 110 PM CDT, Doppler radar was tracking a strong thunderstorm near
Oscar, or 13 miles north of Nocona, moving northeast at 45 mph.

Dime size hail will be possible with this storm.

This storm will remain over mainly rural areas of north central
Montague County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm may intensify, so closely monitor for additional
information or possible warnings from the National Weather Service.

&&

LAT...LON 3398 9763 3395 9759 3393 9759 3392 9760
      3391 9759 3385 9768 3391 9776 3393 9776
      3394 9773 3399 9769 3399 9766
TIME...MOT...LOC 1810Z 225DEG 39KT 3397 9769

Godwin

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 13, 3:22 AM CDT	Wind Advisory	FWD	Comanche, Eastland, Erath, Hamilton, Hood, Jack and 8 more	15 hr
Apr 13, 4:15 AM CDT	Red Flag Warning	FWD	Comanche, Eastland, Erath, Jack, Mills, Montague and 3 more	18 hr
Apr 13, 1:01 PM CDT	Special Weather Statement	FWD	Hunt	29 min
Apr 13, 2:04 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Montague	56 min
Apr 13, 2:55 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Grayson	53 min
Apr 13, 3:04 PM CDT	Severe Thunderstorm Warning	FWD	Cooke, Denton, Grayson	56 min
Apr 13, 3:32 PM CDT	Severe Thunderstorm Warning	FWD	Denton, Tarrant, Wise	58 min
Apr 13, 4:06 PM CDT	Severe Thunderstorm Warning	FWD	Parker, Tarrant	54 min
Apr 13, 4:14 PM CDT	Severe Thunderstorm Warning	FWD	Johnson	61 min
Apr 13, 4:22 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton, Grayson	38 min
Apr 13, 4:28 PM CDT	Severe Thunderstorm Warning	FWD	Denton	62 min
Apr 13, 4:39 PM CDT	Severe Thunderstorm Warning	FWD	Tarrant	18 min
Apr 13, 4:54 PM CDT	Special Weather Statement	FWD	Somervell	36 min
Apr 13, 4:54 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton, Fannin, Grayson	66 min
Apr 13, 5:01 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Johnson, Somervell	59 min
Apr 13, 5:09 PM CDT	Special Weather Statement	FWD	Tarrant	36 min
Apr 13, 5:18 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Denton	42 min
Apr 13, 5:22 PM CDT	Special Weather Statement	FWD	Tarrant	38 min
Apr 13, 5:25 PM CDT	Special Weather Statement	FWD	Hamilton, Mills	35 min
Apr 13, 5:32 PM CDT	Special Weather Statement	FWD	Hill	28 min
Apr 13, 5:46 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Coryell, Hamilton, Lampasas, Mills	59 min
Apr 13, 5:54 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Fannin, Hunt, Lamar	66 min
Apr 13, 6:00 PM CDT	Special Weather Statement	FWD	Johnson	30 min
Apr 13, 6:30 PM CDT	Severe Thunderstorm Warning	FWD	Bosque, Coryell, Hamilton, McLennan	60 min
Apr 13, 6:46 PM CDT	Special Weather Statement	FWD	Lampasas	29 min
Apr 13, 6:49 PM CDT	Areal Flood Advisory	FWD	Collin	116 min
Apr 13, 6:53 PM CDT	Severe Thunderstorm Warning	FWD	Collin, Fannin, Hunt	67 min
Apr 13, 6:55 PM CDT	Special Weather Statement	FWD	Johnson	35 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.