Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 688

May 4, 200712 counties in Kansas; 18 counties in Oklahoma; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 4, 2007, 8:06 PM CDT for 12 counties in Kansas; 18 counties in Oklahoma; 10 counties in Texas. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
May 4, 2007, 8:06 PM CDT (01:06 UTC)
Expired
May 4, 2007, 9:30 PM CDT
In force
84 min
Issued by
the Storm Prediction Center
All 40 counties

Barber County, KS, Barton County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ford County, KS, Hodgeman County, KS, Kiowa County, KS, Meade County, KS, Pawnee County, KS, Pratt County, KS, Stafford County, KS, Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Foard County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Lipscomb County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Vance AFB radar (KVNX), 161 km from the middle of the area, began a volume at 01:09 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

Lamont, OK (KLMN), launched 00:00Z, 1.1 hours before the alert went out and 205 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, Lamont, OK at 00:00Z on 2007-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3764 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, Lamont, OK at 00:00Z on 2007-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
3764 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1116 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
2.5
Supercell composite
15.5

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 4, 7:26 PM CDTTornado WatchSPCDecatur, Gove, Graham, Jewell, Mitchell, Norton and 5 more7 hr
May 4, 8:29 PM CDTMesoscale DiscussionSPCCheyenne, Sherman91 min
May 4, 9:41 PM CDTMesoscale DiscussionSPCDecatur, Graham, Norton, Osborne, Phillips, Rooks and 2 more94 min
May 4, 10:34 PM CDTMesoscale DiscussionSPCClay, Dickinson, Geary, Marion, Marshall, Morris and 2 more56 min
May 4, 11:10 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Comanche, Edwards, Ellsworth and 12 more95 min
May 4, 11:28 PM CDTMesoscale DiscussionSPCCheyenne, Sherman, Wallace92 min
May 5, 1:23 AM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Decatur, Ellis, Ellsworth and 15 more67 min
May 5, 1:30 AM CDTTornado WatchSPCClay, Cloud, Dickinson, Ellsworth, Jewell, Lincoln and 10 more7 hr
May 5, 3:00 AM CDTMesoscale DiscussionSPCBarton, Clay, Cloud, Dickinson, Ellsworth, Jewell and 12 more90 min
May 5, 6:59 AM CDTMesoscale DiscussionSPCRepublic, Washington61 min
May 5, 8:52 AM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Decatur and 40 more53 min
May 5, 9:51 AM CDTTornado Watch PDSSPCBarton, Cheyenne, Decatur, Ellis, Ellsworth, Gove and 21 more12 hr
May 5, 11:32 AM CDTMesoscale DiscussionSPCNorton, Phillips, Smith88 min
May 5, 11:57 AM CDTMesoscale DiscussionSPCBarber, Clark, Comanche, Edwards, Harper, Kingman and 3 more93 min
May 5, 12:15 PM CDTTornado Watch PDSSPCBarber, Clark, Comanche, Edwards, Finney, Ford and 16 more10 hr
May 5, 2:32 PM CDTMesoscale DiscussionSPCClay, Cloud, Dickinson, Geary, Marshall, Morris and 5 more28 min
May 5, 2:42 PM CDTTornado Watch PDSSPCBrown, Chase, Clay, Cloud, Dickinson, Geary and 15 more7 hr
May 5, 3:26 PM CDTMesoscale DiscussionSPCBarton, Clark, Comanche, Edwards, Ellis, Ford and 14 more94 min
May 5, 6:16 PM CDTMesoscale DiscussionSPCBarber, Barton, Clark, Cloud, Comanche, Edwards and 14 more59 min

Nearby

Mesoscale Discussions in Oklahoma, 2007Mesoscale Discussions in Kansas, 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.