Alert archive / Texas / Mesoscale Discussions in 2015

Mesoscale Discussion 573

May 9, 201510 counties in Oklahoma; 23 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2015, 7:49 PM CDT for 10 counties in Oklahoma; 23 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
May 9, 2015, 7:49 PM CDT (00:49 UTC)
Expired
May 9, 2015, 8:45 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 33 counties

Atoka County, OK, Bryan County, OK, Carter County, OK, Choctaw County, OK, Jefferson County, OK, Johnston County, OK, Love County, OK, Marshall County, OK, Murray County, OK, Stephens County, OK, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Eastland County, TX, Ellis County, TX, Erath County, TX, Fannin County, TX, Grayson County, TX, Hood County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Montague County, TX, Parker County, TX, Rains County, TX, Rockwall County, TX, Somervell County, TX, Tarrant County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 79 km from the middle of the area, began a volume at 00:51 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 0.8 hours before the alert went out and 50 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, Fort Worth, TX at 00:00Z on 2015-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2343 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, Fort Worth, TX at 00:00Z on 2015-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 316 square meters per square second.193958Sfc1 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
2343 J/kg
Mixed-layer CIN
-10 J/kg
Mixed-layer LCL
1015 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
316 m²/s²
0-3 km storm-relative helicity
396 m²/s²
Significant tornado parameter
5.1
Supercell composite
26.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 4:20 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Cotton and 9 more55 min
May 10, 6:44 AM CDTMesoscale DiscussionSPCBryan, Choctaw, McCurtain, Pushmataha2 hr
May 10, 8:56 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 8 more2 hr
May 10, 9:28 AM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Craig, Delaware, Haskell and 11 more6 hr
May 10, 10:19 AM CDTTornado WatchSPCMcCurtain13 hr
May 10, 12:33 PM CDTMesoscale DiscussionSPCCarter, Cleveland, Cotton, Garvin, Grady, Jefferson and 12 more2 hr
May 10, 12:58 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Coal and 41 more10 hr
May 10, 3:22 PM CDTMesoscale DiscussionSPCAtoka, Carter, Cleveland, Coal, Creek, Garvin and 24 more53 min
May 10, 5:39 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Cleveland, Creek and 12 more96 min
May 10, 6:15 PM CDTMesoscale DiscussionSPCBryan, Choctaw, McCurtain90 min
May 9, 8:06 PM CDTMesoscale DiscussionSPCDimmit, Frio, Kinney, La Salle, Maverick, Uvalde and 2 more84 min
May 9, 9:38 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 12 more2 hr
May 9, 10:51 PM CDTSevere Thunderstorm WatchSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 33 more10 hr
May 10, 2:06 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Concho, Crockett, Irion and 6 more54 min
May 10, 2:55 AM CDTSevere Thunderstorm WatchSPCBosque, Collin, Comanche, Coryell, Dallas, Denton and 22 more6 hr
May 10, 9:49 AM CDTMesoscale DiscussionSPCBell, Blanco, Bosque, Brown, Burnet, Camp and 49 more2 hr
May 10, 2:42 PM CDTMesoscale DiscussionSPCBandera, Bell, Blanco, Bosque, Bowie, Brown and 58 more2 hr

Nearby

Mesoscale Discussions in Texas, 2015Mesoscale Discussions in Oklahoma, 2015Every mesoscale discussion in 2015

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.