Alert archive / Texas / Mesoscale Discussions in 2007

Mesoscale Discussion 2089

October 17, 200713 counties in Oklahoma; 25 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 17, 2007, 6:07 AM CDT for 13 counties in Oklahoma; 25 counties in Texas. It was in force for 113 min.

The area

The outline as issued.

The facts

Issued
Oct 17, 2007, 6:07 AM CDT (11:07 UTC)
Expired
Oct 17, 2007, 8:00 AM CDT
In force
113 min
Issued by
the Storm Prediction Center
All 38 counties

Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Floyd County, TX, Foard County, TX, Garza County, TX, Gray County, TX, Hale County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Kent County, TX, King County, TX, Knox County, TX, Lubbock County, TX, Motley County, TX, Stonewall County, TX, Swisher County, TX, Wheeler County, TX, Wilbarger County, TX

The radar

The Altus AFB radar (KFDR), 107 km from the middle of the area, began a volume at 11:09 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 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, 11.1 hours before the alert went out and 173 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 2007-10-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 234 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 2007-10-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 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
234 J/kg
Mixed-layer CIN
-29 J/kg
Mixed-layer LCL
2083 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
174 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

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
Oct 16, 10:36 PM CDTMesoscale DiscussionSPCBeckham, Greer, Harmon, Jackson, Roger Mills114 min
Oct 17, 1:12 AM CDTMesoscale DiscussionSPCBeaver, Beckham, Dewey, Ellis, Harmon, Harper and 4 more93 min
Oct 17, 1:36 AM CDTTornado WatchSPCBeckham, Custer, Dewey, Ellis, Greer, Harmon and 7 more7 hr
Oct 17, 1:44 AM CDTSevere Thunderstorm WatchSPCBeaver, Texas7 hr
Oct 17, 4:07 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Canadian, Cleveland, Craig, Creek and 19 more113 min
Oct 17, 6:50 AM CDTMesoscale DiscussionSPCBeaver, Texas100 min
Oct 17, 7:43 AM CDTTornado WatchSPCBlaine, Caddo, Canadian, Carter, Cleveland, Comanche and 33 more7 hr
Oct 17, 10:24 AM CDTMesoscale DiscussionSPCAdair, Cherokee, Cleveland, Craig, Creek, Delaware and 25 more96 min
Oct 17, 10:43 AM CDTTornado WatchSPCAdair, Cherokee, Craig, Delaware, Haskell, McIntosh and 7 more7 hr
Oct 17, 1:20 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Cherokee, Choctaw, Coal, Creek and 25 more85 min
Oct 17, 2:25 PM CDTTornado WatchSPCAlfalfa, Atoka, Blaine, Bryan, Caddo, Canadian and 44 more8 hr
Oct 17, 4:31 PM CDTTornado WatchSPCAdair, Cherokee, Craig, Delaware, Haskell, LeFlore and 9 more7 hr
Oct 17, 6:23 PM CDTMesoscale DiscussionSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 43 more37 min
Oct 16, 11:45 PM CDTSevere Thunderstorm WatchSPCArmstrong, Carson, Collingsworth, Donley, Gray, Hansford and 10 more2 hr
Oct 17, 4:41 AM CDTMesoscale DiscussionSPCArcher, Baylor, Borden, Brown, Callahan, Coke and 32 more2 hr
Oct 17, 9:36 AM CDTMesoscale DiscussionSPCJasper, Jefferson, Newton, Orange, Panola, Sabine and 2 more114 min
Oct 17, 11:13 AM CDTTornado WatchSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 21 more7 hr
Oct 17, 2:36 PM CDTMesoscale DiscussionSPCAngelina, Bowie, Camp, Cass, Cherokee, Franklin and 22 more114 min

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.