Alert archive / Texas / Mesoscale Discussions in 2022

Mesoscale Discussion 477

April 13, 202225 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 13, 2022, 12:38 PM CDT for 25 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
Apr 13, 2022, 12:38 PM CDT (17:38 UTC)
Expired
Apr 13, 2022, 2:15 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 120
All 25 counties

Anderson County, TX, Camp County, TX, Delta County, TX, Ellis County, TX, Falls County, TX, Fannin County, TX, Franklin County, TX, Freestone County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Limestone County, TX, McLennan County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 108 km from the middle of the area, began a volume at 17:40 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, 5.6 hours before the alert went out and 228 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 2022-04-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1120 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 2022-04-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 355 square meters per square second.19395878Sfc1 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
1120 J/kg
Mixed-layer CIN
-142 J/kg
Mixed-layer LCL
679 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
355 m²/s²
0-3 km storm-relative helicity
649 m²/s²
Significant tornado parameter
0.8
Supercell composite
4.7

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 12, 7:29 PM CDTTornado WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 18 more7 hr
Apr 12, 8:49 PM CDTMesoscale DiscussionSPCLeon, Madison, Robertson, Walker86 min
Apr 12, 9:39 PM CDTMesoscale DiscussionSPCBowie, Cass, Harrison, Marion, Nacogdoches, Panola and 3 more96 min
Apr 13, 7:05 AM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Collin, Dallas, Delta and 22 more2 hr
Apr 13, 10:07 AM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Gregg, Harrison, Marion and 4 more83 min
Apr 13, 10:37 AM CDTTornado WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 15 more6 hr
Apr 13, 11:57 AM CDTMesoscale DiscussionSPCAnderson, Camp, Delta, Ellis, Falls, Fannin and 19 more93 min
Apr 13, 2:48 PM CDTTornado WatchSPCSabine, San Augustine, Shelby8 hr
Apr 13, 5:11 PM CDTMesoscale DiscussionSPCHardin, Jasper, Newton, Orange, Tyler2 hr
Apr 13, 5:25 PM CDTTornado WatchSPCNewton5 hr

Nearby

Mesoscale Discussions in Texas, 2022Every mesoscale discussion in 2022

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.