Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 1623

August 1, 200725 counties in Oklahoma; 14 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Aug 1, 2007, 2:31 PM CDT for 25 counties in Oklahoma; 14 counties in Texas. It was in force for 59 min.

The area

The outline as issued.

The facts

Issued: Aug 1, 2007, 2:31 PM CDT (19:31 UTC)
Expired: Aug 1, 2007, 3:30 PM CDT
In force: 59 min
Issued by: the Storm Prediction Center

All 39 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Carter County, OK, Cleveland County, OK, Comanche County, OK, Cotton County, OK, Custer County, OK, Dewey County, OK, Garvin County, OK, Grady County, OK, Greer County, OK, Jefferson County, OK, Johnston County, OK, Kingfisher County, OK, Kiowa County, OK, Love County, OK, Major County, OK, Marshall County, OK, McClain County, OK, Murray County, OK, Stephens County, OK, Tillman County, OK, Washita County, OK, Clay County, TX, Cooke County, TX, Dallas County, TX, Denton County, TX, Ellis County, TX, Freestone County, TX, Grayson County, TX, Johnson County, TX, Leon County, TX, Montague County, TX, Navarro County, TX, Tarrant County, TX, Wichita County, TX, Wise County, TX

The radar

The Dallas/Ft Worth radar (KFWS), 103 km from the middle of the area, began a volume at 19:32 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

Fort Worth, TX (KFWD), launched 12:00Z, 7.5 hours before the alert went out and 75 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 629 J/kg
Mixed-layer CIN: -105 J/kg
Mixed-layer LCL: 1287 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 71 m²/s²
0-3 km storm-relative helicity: 70 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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Nearby

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