Alert archive / Oklahoma / Mesoscale Discussions in 2006

Mesoscale Discussion 754

May 4, 2006Crawford County, Sebastian County, Washington County, Arkansas; 14 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 4, 2006, 4:16 AM CDT for Crawford County, Sebastian County, Washington County, Arkansas; 14 counties in Oklahoma. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: May 4, 2006, 4:16 AM CDT (09:16 UTC)
Expired: May 4, 2006, 7:15 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Crawford County, AR, Sebastian County, AR, Washington County, AR, Adair County, OK, Cherokee County, OK, Coal County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, McIntosh County, OK, Muskogee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Sequoyah County, OK, Wagoner County, OK

The radar

The Western Arkansas radar (KSRX), 85 km from the middle of the area, began a volume at 09:20 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

Norman, OK (KOUN), launched 00:00Z, 9.3 hours before the alert went out and 191 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: 2529 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1101 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 98 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 4.6

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.

Issued	Product	Office	Counties	Lasted
May 3, 7:50 PM CDT	Mesoscale Discussion	SPC	Crittenden, Cross, Lee, Monroe, Phillips, Prairie and 1 more	55 min
May 3, 10:14 PM CDT	Mesoscale Discussion	SPC	Baxter, Fulton, Independence, Izard, Lawrence, Marion and 4 more	91 min
May 4, 12:09 PM CDT	Mesoscale Discussion	SPC	Hempstead, Howard, Lafayette, Little River, Miller, Nevada and 3 more	2 hr
May 4, 1:06 PM CDT	Severe Thunderstorm Watch	SPC	Bradley, Calhoun, Clark, Columbia, Dallas, Hempstead and 9 more	6 hr
May 4, 4:27 PM CDT	Severe Thunderstorm Watch	SPC	Ashley, Chicot, Desha, Drew	6 hr
May 4, 5:30 PM CDT	Mesoscale Discussion	SPC	Lafayette, Union	60 min
May 3, 7:20 PM CDT	Mesoscale Discussion	SPC	Beckham, Caddo, Canadian, Comanche, Cotton, Grady and 8 more	85 min
May 3, 9:46 PM CDT	Mesoscale Discussion	SPC	Beckham, Comanche, Cotton, Greer, Harmon, Jackson and 3 more	89 min
May 4, 1:26 AM CDT	Mesoscale Discussion	SPC	Blaine, Canadian, Cherokee, Creek, Kingfisher, Lincoln and 12 more	94 min

Nearby

Mesoscale Discussions in Oklahoma, 2006 Mesoscale Discussions in Arkansas, 2006 Every mesoscale discussion in 2006

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.