Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 737

May 6, 200723 counties in Oklahoma; 9 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 6, 2007, 11:04 PM CDT for 23 counties in Oklahoma; 9 counties in Texas. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
May 6, 2007, 11:04 PM CDT (04:04 UTC)
Expired
May 7, 2007, 12:00 AM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 32 counties

Atoka County, OK, Bryan County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Choctaw County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Garvin County, OK, Grady County, OK, Jefferson County, OK, Johnston County, OK, Kiowa County, OK, Logan County, OK, Love County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Oklahoma County, OK, Pushmataha County, OK, Stephens County, OK, Tillman County, OK, Archer County, TX, Clay County, TX, Cooke County, TX, Fannin County, TX, Grayson County, TX, Lamar County, TX, Montague County, TX, Wichita County, TX, Wilbarger County, TX

The radar

The Norman radar (KTLX), 106 km from the middle of the area, began a volume at 04:04 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, 4.1 hours before the alert went out and 94 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 2007-05-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2453 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 2007-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 187 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
2453 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
905 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
187 m²/s²
0-3 km storm-relative helicity
236 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
May 6, 8:55 PM CDTMesoscale DiscussionSPCCherokee, Craig, Creek, Delaware, Hughes, McIntosh and 14 more65 min
May 6, 9:07 PM CDTTornado WatchSPCCherokee, Coal, Craig, Creek, Delaware, Hughes and 19 more6 hr
May 6, 9:26 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 10 more64 min
May 6, 11:34 PM CDTMesoscale DiscussionSPCCherokee, Coal, Craig, Creek, Delaware, Hughes and 19 more56 min
May 6, 11:54 PM CDTTornado WatchSPCCaddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 13 more5 hr
May 7, 1:59 AM CDTMesoscale DiscussionSPCCherokee, Coal, Craig, Creek, Delaware, Hughes and 18 more91 min
May 7, 4:30 AM CDTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 8 more30 min
May 7, 10:29 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Johnston and 3 more2 hr
May 7, 10:51 AM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 10 more5 hr
May 6, 7:04 PM CDTMesoscale DiscussionSPCCrockett, Irion, Reagan, Terrell, Upton56 min
May 6, 7:55 PM CDTTornado WatchSPCCoke, Coleman, Concho, Crockett, Glasscock, Howard and 13 more6 hr
May 6, 10:20 PM CDTMesoscale DiscussionSPCConcho, Irion, Reagan, Tom Green55 min
May 7, 1:14 PM CDTMesoscale DiscussionSPCCrockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more61 min
May 7, 1:59 PM CDTMesoscale DiscussionSPCCrockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more61 min
May 7, 5:38 PM CDTMesoscale DiscussionSPCDimmit, Kinney, Maverick, Uvalde, Zavala67 min
May 7, 5:59 PM CDTTornado WatchSPCBandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more8 hr
May 7, 6:19 PM CDTMesoscale DiscussionSPCBrewster, Crane, Ector, Jeff Davis, Midland, Pecos and 7 more86 min
May 7, 6:42 PM CDTTornado WatchSPCBrewster, Jeff Davis, Pecos, Presidio, Reeves, Terrell5 hr

Nearby

Mesoscale Discussions in Oklahoma, 2007Mesoscale Discussions in Texas, 2007Every mesoscale discussion in 2007

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.