Alert archive / Texas / Mesoscale Discussions in 2008

Mesoscale Discussion 598

April 9, 200835 counties in Oklahoma; 43 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2008, 12:24 PM CDT for 35 counties in Oklahoma; 43 counties in Texas. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2008, 12:24 PM CDT (17:24 UTC)
Expired
Apr 9, 2008, 1:30 PM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 78 counties

Atoka County, OK, Beckham County, OK, Blaine County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Coal County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Harmon County, OK, Hughes County, OK, Jackson County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Lincoln County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pontotoc County, OK, Pottawatomie County, OK, Roger Mills County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Archer County, TX, Armstrong County, TX, Baylor County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Clay County, TX, Collin County, TX, Collingsworth County, TX, Cooke County, TX, Cottle County, TX, Denton County, TX, Dickens County, TX, Donley County, TX, Fannin County, TX, Fisher County, TX, Floyd County, TX, Foard County, TX, Gray County, TX, Grayson County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Jack County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Montague County, TX, Motley County, TX, Palo Pinto County, TX, Parker County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX, Wise County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 18 km from the middle of the area, began a volume at 17:26 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 Sill, OK (KFSI), launched 12:00Z, 5.4 hours before the alert went out and 49 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 Sill, OK at 12:00Z on 2008-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Fort Sill, OK at 12:00Z on 2008-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 165 square meters per square second.1939587897Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1936 m above ground
0-6 km bulk shear
64 kt
0-1 km storm-relative helicity
165 m²/s²
0-3 km storm-relative helicity
249 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 8, 10:36 PM CDTMesoscale DiscussionSPCMcCurtain84 min
Apr 8, 11:51 PM CDTSevere Thunderstorm WatchSPCMcCurtain5 hr
Apr 9, 3:29 AM CDTMesoscale DiscussionSPCMcCurtain61 min
Apr 9, 9:06 AM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 9 more54 min
Apr 9, 9:35 AM CDTSevere Thunderstorm WatchSPCBeckham, Caddo, Comanche, Cotton, Custer, Grady and 9 more6 hr
Apr 9, 3:07 PM CDTMesoscale DiscussionSPCBlaine, Caddo, Canadian, Cleveland, Comanche, Cotton and 25 more53 min
Apr 9, 3:33 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 5 more27 min
Apr 9, 3:48 PM CDTTornado Watch PDSSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 6 more7 hr
Apr 9, 5:38 PM CDTTornado WatchSPCAdair, Cherokee, Delaware, Haskell, Hughes, Latimer and 11 more5 hr
Apr 9, 6:12 PM CDTMesoscale DiscussionSPCJackson63 min
Apr 9, 6:55 PM CDTSevere Thunderstorm WatchSPCCaddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 15 more8 hr
Apr 8, 7:33 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Franklin, Gregg, Harrison and 6 more117 min
Apr 8, 8:06 PM CDTMesoscale DiscussionSPCBell, Bosque, Burnet, Coryell, Ellis, Falls and 16 more114 min
Apr 8, 8:48 PM CDTTornado WatchSPCBell, Burnet, Coryell, Falls, Gillespie, Kimble and 11 more2 hr
Apr 9, 6:00 AM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Castro, Childress, Cochran and 22 more60 min
Apr 9, 6:27 AM CDTSevere Thunderstorm WatchSPCAndrews, Armstrong, Bailey, Borden, Briscoe, Carson and 36 more8 hr
Apr 9, 12:46 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 41 more59 min
Apr 9, 1:20 PM CDTTornado Watch PDSSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 40 more7 hr
Apr 9, 4:01 PM CDTMesoscale DiscussionSPCCass, Harrison, Marion59 min
Apr 9, 5:12 PM CDTMesoscale DiscussionSPCArcher, Baylor, Bell, Borden, Bosque, Brown and 51 more63 min
Apr 9, 6:59 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 34 more61 min

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.