Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 371

March 29, 200723 counties in Oklahoma; 17 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Mar 29, 2007, 3:50 PM CDT for 23 counties in Oklahoma; 17 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Mar 29, 2007, 3:50 PM CDT (20:50 UTC)
Expired
Mar 29, 2007, 5:15 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 40 counties

Atoka County, OK, Bryan County, OK, Choctaw County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Haskell County, OK, Hughes County, OK, Johnston County, OK, Latimer County, OK, Lincoln County, OK, Marshall County, OK, McIntosh County, OK, Murray County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Pushmataha County, OK, Seminole County, OK, Wagoner County, OK, Collin County, TX, Cooke County, TX, Dallas County, TX, Delta County, TX, Denton County, TX, Ellis County, TX, Fannin County, TX, Grayson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Johnson County, TX, Kaufman County, TX, Lamar County, TX, Rains County, TX, Rockwall County, TX, Tarrant County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 138 km from the middle of the area, began a volume at 20:53 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

Fort Worth, TX (KFWD), launched 12:00Z, 8.8 hours before the alert went out and 112 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, Fort Worth, TX at 12:00Z on 2007-03-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 447 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, Fort Worth, TX at 12:00Z on 2007-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 290 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
447 J/kg
Mixed-layer CIN
-246 J/kg
Mixed-layer LCL
674 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
290 m²/s²
0-3 km storm-relative helicity
425 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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
Mar 28, 7:08 PM CDTMesoscale DiscussionSPCBeaver, Texas2 hr
Mar 28, 8:52 PM CDTMesoscale DiscussionSPCBeaver, Cimarron, Texas113 min
Mar 28, 10:58 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 10 more62 min
Mar 28, 11:22 PM CDTTornado WatchSPCBeaver, Beckham, Custer, Dewey, Ellis, Greer and 8 more6 hr
Mar 29, 2:03 AM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 16 more57 min
Mar 29, 11:01 AM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Coal, Garvin, Hughes and 7 more119 min
Mar 29, 12:05 PM CDTSevere Thunderstorm WatchSPCAtoka, Bryan, Carter, Coal, Garvin, Johnston and 4 more6 hr
Mar 29, 5:44 PM CDTTornado WatchSPCAdair, Atoka, Bryan, Carter, Cherokee, Choctaw and 28 more6 hr
Mar 28, 8:51 PM CDTTornado WatchSPCAndrews, Borden, Coke, Crane, Dawson, Ector and 19 more7 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.