Alert archive / Oklahoma / Mesoscale Discussions in 2008

Mesoscale Discussion 582

April 7, 200814 counties in Kansas; 48 counties in Oklahoma; 5 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2008, 9:12 PM CDT for 14 counties in Kansas; 48 counties in Oklahoma; 5 counties in Texas. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued
Apr 7, 2008, 9:12 PM CDT (02:12 UTC)
Expired
Apr 7, 2008, 10:15 PM CDT
In force
63 min
Issued by
the Storm Prediction Center
All 67 counties

Barber County, KS, Butler County, KS, Chautauqua County, KS, Comanche County, KS, Cowley County, KS, Elk County, KS, Harper County, KS, Kingman County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Sedgwick County, KS, Sumner County, KS, Wilson County, KS, Alfalfa County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Craig County, OK, Creek County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Garvin County, OK, Grady County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Jefferson County, OK, Kay County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, McClain County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Stephens County, OK, Tillman County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Clay County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 72 km from the middle of the area, began a volume at 02:12 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

Norman, OK (KOUN), launched 00:00Z, 2.2 hours before the alert went out and 71 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 00:00Z on 2008-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 560 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 00:00Z on 2008-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 149 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
560 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
1836 m above ground
0-6 km bulk shear
67 kt
0-1 km storm-relative helicity
149 m²/s²
0-3 km storm-relative helicity
391 m²/s²
Significant tornado parameter
0.2
Supercell composite
7.1

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, 1:00 AM CDTSevere Thunderstorm WatchSPCAllen, Anderson, Bourbon, Butler, Chase, Chautauqua and 21 more6 hr
Apr 7, 7:28 PM CDTSevere Thunderstorm WatchSPCBlaine, Canadian, Cherokee, Craig, Creek, Custer and 23 more8 hr
Apr 7, 11:05 PM CDTMesoscale DiscussionSPCCreek, Lincoln, Pawnee, Payne, Tulsa85 min
Apr 8, 2:34 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Creek, Delaware, Lincoln and 16 more56 min
Apr 8, 2:52 AM CDTTornado WatchSPCAdair, Cherokee, Craig, Creek, Delaware, Haskell and 22 more6 hr
Apr 8, 4:57 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 7 more63 min
Apr 8, 2:30 PM CDTMesoscale DiscussionSPCMcCurtain60 min
Apr 8, 2:52 PM CDTSevere Thunderstorm WatchSPCMcCurtain6 hr
Apr 8, 3:09 PM CDTMesoscale DiscussionSPCAnderson, Bandera, Bell, Blanco, Burnet, Cherokee and 27 more2 hr
Apr 8, 5:30 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Delta, Franklin, Hopkins and 10 more90 min

Nearby

Mesoscale Discussions in Oklahoma, 2008Mesoscale Discussions in Kansas, 2008Mesoscale Discussions in Texas, 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.