Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 815

May 7, 20086 counties in Oklahoma; 18 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 7, 2008, 6:35 PM CDT for 6 counties in Oklahoma; 18 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
May 7, 2008, 6:35 PM CDT (23:35 UTC)
Expired
May 7, 2008, 7:30 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 24 counties

Atoka County, OK, Bryan County, OK, Choctaw County, OK, Coal County, OK, Johnston County, OK, Marshall County, OK, Anderson County, TX, Brazos County, TX, Delta County, TX, Fannin County, TX, Freestone County, TX, Grayson County, TX, Henderson County, TX, Hopkins County, TX, Hunt County, TX, Lamar County, TX, Leon County, TX, Madison County, TX, Milam County, TX, Rains County, TX, Robertson County, TX, Smith County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 109 km from the middle of the area, began a volume at 23:38 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

Fort Worth, TX (KFWD), launched 12:00Z, 11.6 hours before the alert went out and 100 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 12:00Z on 2008-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 72 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 12:00Z on 2008-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 196 square meters per square second.1939587897117Sfc1 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
72 J/kg
Mixed-layer CIN
-374 J/kg
Mixed-layer LCL
627 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
196 m²/s²
0-3 km storm-relative helicity
398 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 6, 8:50 PM CDTMesoscale DiscussionSPCBeckham, Custer, Ellis, Greer, Harmon, Jackson and 4 more85 min
May 6, 9:51 PM CDTSevere Thunderstorm WatchSPCBeaver, Cimarron, Harmon, Jackson, Texas, Tillman7 hr
May 6, 9:59 PM CDTMesoscale DiscussionSPCWoods61 min
May 7, 12:04 AM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Ellis, Greer, Harmon and 5 more86 min
May 7, 2:47 AM CDTMesoscale DiscussionSPCBeckham, Caddo, Comanche, Cotton, Custer, Greer and 5 more58 min
May 7, 7:07 AM CDTMesoscale DiscussionSPCAtoka, Carter, Cherokee, Cleveland, Coal, Creek and 25 more53 min
May 7, 7:33 AM CDTSevere Thunderstorm WatchSPCAdair, Cherokee, Delaware, Haskell, Latimer, LeFlore and 9 more5 hr
May 7, 9:52 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Coal, Craig, Creek and 22 more83 min
May 7, 1:33 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Cleveland, Coal, Cotton and 14 more6 hr
May 7, 3:13 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 7 more2 hr
May 7, 4:47 PM CDTMesoscale DiscussionSPCHaskell, Latimer, LeFlore, McCurtain, Pushmataha88 min
May 7, 5:28 PM CDTTornado WatchSPCAdair, Cherokee, Choctaw, Craig, Creek, Delaware and 20 more8 hr
May 6, 11:35 PM CDTMesoscale DiscussionSPCBandera, Edwards, Gillespie, Kerr, Kinney, Maverick and 4 more85 min
May 7, 11:59 AM CDTMesoscale DiscussionSPCArcher, Baylor, Borden, Callahan, Cottle, Crosby and 29 more91 min
May 7, 1:17 PM CDTMesoscale DiscussionSPCArcher, Baylor, Borden, Callahan, Cottle, Crosby and 29 more88 min
May 7, 3:42 PM CDTTornado WatchSPCAnderson, Bell, Ellis, Falls, Freestone, Henderson and 9 more6 hr

Nearby

Mesoscale Discussions in Texas, 2008Mesoscale Discussions in Oklahoma, 2008Every mesoscale discussion in 2008

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.