Alert archive / Texas / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 348, NWS Fort Worth, TX

November 30, 2019Collin County, Texas

NWS Fort Worth, TX issued this severe thunderstorm warning at Nov 30, 2019, 6:34 AM CST for Collin 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 counties it named.

The facts

Issued
Nov 30, 2019, 6:34 AM CST (12:34 UTC)
Expired
Nov 30, 2019, 7:15 AM CST
In force
41 min
Issued by
NWS Fort Worth, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
50.0 mph

County Collin County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 97 km from the middle of the area, began a volume at 12:34 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

Shreveport, LA (KSHV), launched 12:00Z, 0.6 hours before the alert went out and 275 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, Shreveport, LA at 12:00Z on 2019-11-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 320 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, Shreveport, LA at 12:00Z on 2019-11-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 487 square meters per square second.1939587897Sfc1 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
320 J/kg
Mixed-layer CIN
-311 J/kg
Mixed-layer LCL
606 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
487 m²/s²
0-3 km storm-relative helicity
527 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.4

Open this sounding in Storm Lab

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 30, 5:08 AM CSTSpecial Weather StatementFWDGrayson52 min
Nov 30, 5:23 AM CSTSevere Thunderstorm WarningFWDFannin, Grayson52 min
Nov 30, 5:58 AM CSTSpecial Weather StatementFWDFannin47 min
Nov 30, 6:27 AM CSTSpecial Weather StatementFWDCollin48 min
Nov 30, 7:07 AM CSTSpecial Weather StatementFWDFannin38 min
Nov 30, 7:36 AM CSTSevere Thunderstorm WarningFWDDelta, Fannin, Lamar39 min
Nov 30, 8:43 AM CSTSpecial Weather StatementFWDRockwall32 min
Nov 30, 9:13 AM CSTSpecial Weather StatementFWDKaufman, Rains, Van Zandt47 min
Nov 30, 9:32 AM CSTSevere Thunderstorm WarningFWDRains, Van Zandt43 min
Nov 30, 1:24 PM CSTSpecial Weather StatementFWDAnderson36 min

Nearby

Severe Thunderstorm Warnings in Texas, 2019Every severe thunderstorm warning in 2019

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.