Alert archive / Texas / Mesoscale Discussions in 2018

Mesoscale Discussion 335

May 3, 201813 counties in Oklahoma; 45 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 3, 2018, 9:55 AM CDT for 13 counties in Oklahoma; 45 counties in Texas. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued
May 3, 2018, 9:55 AM CDT (14:55 UTC)
Expired
May 3, 2018, 11:00 AM CDT
In force
65 min
Issued by
the Storm Prediction Center
All 58 counties

Carter County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Pontotoc County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Bell County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Clay County, TX, Coleman County, TX, Collin County, TX, Comanche County, TX, Cooke County, TX, Coryell County, TX, Dallas County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Falls County, TX, Grayson County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Hunt County, TX, Jack County, TX, Johnson County, TX, Kaufman County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Palo Pinto County, TX, Parker County, TX, Rockwall County, TX, San Saba County, TX, Somervell County, TX, Stephens County, TX, Tarrant County, TX, Wichita County, TX, Williamson County, TX, Wise County, TX, Young County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 82 km from the middle of the area, began a volume at 14:56 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, 2.9 hours before the alert went out and 288 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 2018-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 236 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 2018-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
236 J/kg
Mixed-layer CIN
-135 J/kg
Mixed-layer LCL
974 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
244 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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
May 2, 7:14 PM CDTMesoscale DiscussionSPCAtoka, Cherokee, Coal, Craig, Creek, Delaware and 18 more2 hr
May 2, 8:05 PM CDTTornado WatchSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 30 more6 hr
May 2, 11:09 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Cherokee, Coal and 26 more96 min
May 3, 4:06 AM CDTMesoscale DiscussionSPCBryan, Carter, Cleveland, Coal, Comanche, Cotton and 14 more114 min
May 3, 5:18 AM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Coal, Comanche, Cotton and 11 more6 hr
May 3, 9:02 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Haskell, Hughes, Latimer, LeFlore and 4 more88 min
May 3, 12:35 PM CDTMesoscale DiscussionSPCChoctaw, LeFlore, McCurtain85 min
May 2, 7:17 PM CDTMesoscale DiscussionSPCCallahan, Coke, Coleman, Concho, Crockett, Eastland and 27 more88 min
May 2, 10:27 PM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Coleman, Concho, Crockett and 28 more93 min
May 3, 5:55 AM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coleman, Comanche, Concho and 28 more2 hr
May 3, 7:03 AM CDTSevere Thunderstorm WatchSPCBell, Bosque, Brown, Burnet, Coleman, Collin and 38 more7 hr
May 3, 5:42 PM CDTMesoscale DiscussionSPCBandera, Bexar, Dimmit, Edwards, Frio, Gillespie and 8 more2 hr

Nearby

Mesoscale Discussions in Texas, 2018Mesoscale Discussions in Oklahoma, 2018Every mesoscale discussion 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.