Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 940

May 31, 2007Greer County, Harmon County, Jackson County, Oklahoma; 21 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 31, 2007, 7:52 PM CDT for Greer County, Harmon County, Jackson County, Oklahoma; 21 counties in Texas. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued
May 31, 2007, 7:52 PM CDT (00:52 UTC)
Expired
May 31, 2007, 9:15 PM CDT
In force
83 min
Issued by
the Storm Prediction Center
All 24 counties

Greer County, OK, Harmon County, OK, Jackson County, OK, Briscoe County, TX, Childress County, TX, Cochran County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hockley County, TX, King County, TX, Lamb County, TX, Lubbock County, TX, Lynn County, TX, Motley County, TX, Terry County, TX, Wilbarger County, TX, Yoakum County, TX

The radar

The Lubbock radar (KLBB), 78 km from the middle of the area, began a volume at 00:55 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 0.9 hours before the alert went out and 159 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 2007-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2316 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 2007-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 117 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
2316 J/kg
Mixed-layer CIN
-76 J/kg
Mixed-layer LCL
1473 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
117 m²/s²
0-3 km storm-relative helicity
187 m²/s²
Significant tornado parameter
0.6
Supercell composite
10.0

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 31, 9:07 PM CDTMesoscale DiscussionSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 11 more53 min
May 31, 9:38 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 32 more7 hr
Jun 1, 12:04 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Craig, Delaware, Mayes, Muskogee and 9 more116 min
Jun 1, 1:14 AM CDTSevere Thunderstorm WatchSPCAdair, Cherokee, Craig, Creek, Delaware, Haskell and 14 more6 hr
Jun 1, 1:42 AM CDTMesoscale DiscussionSPCCraig, Kay, Nowata, Osage, Washington2 hr
Jun 1, 2:24 AM CDTMesoscale DiscussionSPCComanche, Cotton, Harmon, Jackson, Jefferson, Stephens and 1 more66 min
Jun 1, 3:18 AM CDTMesoscale DiscussionSPCAdair, Alfalfa, Blaine, Canadian, Cherokee, Cleveland and 43 more87 min
Jun 1, 5:39 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Delaware, Haskell, McIntosh, Mayes and 7 more66 min
Jun 1, 1:45 PM CDTMesoscale DiscussionSPCComanche, Cotton, Greer, Harmon, Jackson, Jefferson and 2 more60 min
Jun 1, 2:03 PM CDTTornado WatchSPCComanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more7 hr
Jun 1, 4:38 PM CDTMesoscale DiscussionSPCCaddo, Canadian, Cleveland, Creek, Garfield, Grady and 14 more67 min
Jun 1, 5:15 PM CDTSevere Thunderstorm WatchSPCAdair, Blaine, Caddo, Canadian, Carter, Cherokee and 40 more8 hr
Jun 1, 5:30 PM CDTMesoscale DiscussionSPCComanche, Cotton, Jackson, Tillman60 min
May 31, 10:39 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Childress, Clay, Cottle, Crosby and 13 more6 hr
Jun 1, 7:58 AM CDTMesoscale DiscussionSPCArmstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 23 more62 min
Jun 1, 5:48 PM CDTSevere Thunderstorm WatchSPCCallahan, Eastland, Erath, Fisher, Haskell, Hood and 12 more6 hr

Nearby

Mesoscale Discussions in Texas, 2007Mesoscale Discussions in Oklahoma, 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.