Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 807

May 7, 200811 counties in Oklahoma; 27 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 7, 2008, 2:47 AM CDT for 11 counties in Oklahoma; 27 counties in Texas. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
May 7, 2008, 2:47 AM CDT (07:47 UTC)
Expired
May 7, 2008, 3:45 AM CDT
In force
58 min
Issued by
the Storm Prediction Center
All 38 counties

Beckham County, OK, Caddo County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Baylor County, TX, Briscoe County, TX, Childress County, TX, Clay County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Motley County, TX, Stonewall County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 83 km from the middle of the area, began a volume at 07:47 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 7.8 hours before the alert went out and 218 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, Amarillo Airport, TX at 00:00Z on 2008-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1354 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, Amarillo Airport, TX at 00:00Z on 2008-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 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
1354 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1336 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.9

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 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, 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 7, 6:35 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Johnston, Marshall55 min
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.