Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 149, NWS Fort Worth, TX

June 7, 2018Denton County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Jun 7, 2018, 5:20 PM CDT for Denton County, Texas. It was in force for 55 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
Jun 7, 2018, 5:20 PM CDT (22:20 UTC)
Expired
Jun 7, 2018, 6:15 PM CDT
In force
55 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
65.0 mph

County Denton County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 72 km from the middle of the area, began a volume at 22:24 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

Norman, OK (KOUN), launched 12:00Z, 10.3 hours before the alert went out and 226 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-pSkew-T log-p diagram, Norman, OK at 12:00Z on 2018-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2137 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Norman, OK at 12:00Z on 2018-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2137 J/kg
Mixed-layer CIN
-134 J/kg
Mixed-layer LCL
1220 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
173 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.9

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 2:45 PM CDTSpecial Weather StatementFWDCooke, Montague45 min
Jun 7, 3:33 PM CDTSpecial Weather StatementFWDCooke, Montague42 min
Jun 7, 3:42 PM CDTSpecial Weather StatementFWDFannin48 min
Jun 7, 3:52 PM CDTSpecial Weather StatementFWDGrayson53 min
Jun 7, 3:57 PM CDTSevere Thunderstorm WarningFWDFannin, Grayson63 min
Jun 7, 4:00 PM CDTSpecial Weather StatementFWDLamar45 min
Jun 7, 4:14 PM CDTSpecial Weather StatementFWDDenton, Wise46 min
Jun 7, 4:22 PM CDTSevere Thunderstorm WarningFWDCooke, Denton53 min
Jun 7, 4:46 PM CDTSpecial Weather StatementFWDCollin29 min
Jun 7, 4:55 PM CDTSevere Thunderstorm WarningFWDCollin, Grayson38 min
Jun 7, 5:13 PM CDTSpecial Weather StatementFWDDenton47 min
Jun 7, 5:29 PM CDTSpecial Weather StatementFWDDallas, Parker, Tarrant46 min
Jun 7, 5:45 PM CDTSpecial Weather StatementFWDHopkins30 min
Jun 7, 5:54 PM CDTSevere Thunderstorm WarningFWDDallas, Tarrant49 min
Jun 7, 5:59 PM CDTSpecial Weather StatementFWDRains31 min
Jun 7, 6:00 PM CDTSpecial Weather StatementFWDTarrant45 min
Jun 7, 6:06 PM CDTAreal Flood AdvisoryFWDHopkins, Hunt, Rains114 min
Jun 7, 6:38 PM CDTSpecial Weather StatementFWDTarrant37 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018Every 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.