Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 1476

July 2, 20046 counties in Arkansas; 7 counties in Missouri; 20 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2004, 8:26 PM CDT for 6 counties in Arkansas; 7 counties in Missouri; 20 counties in Oklahoma. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jul 2, 2004, 8:26 PM CDT (01:26 UTC)
Expired: Jul 2, 2004, 10:00 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

All 33 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Madison County, AR, Washington County, AR, Barry County, MO, Greene County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Polk County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Coal County, OK, Creek County, OK, Delaware County, OK, Haskell County, OK, Hughes County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Ottawa County, OK, Pittsburg County, OK, Pontotoc County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK

The radar

The Tulsa radar (KINX), 69 km from the middle of the area, began a volume at 01:29 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, 1.4 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: 3602 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1156 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 153 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 9.0

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.

Issued	Product	Office	Counties	Lasted
Jul 2, 10:39 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 18 more	96 min
Jul 3, 3:19 AM CDT	Mesoscale Discussion	SPC	Polk, Scott	2 hr
Jul 2, 7:17 PM CDT	Mesoscale Discussion	SPC	Comanche, Cotton, Greer, Harmon, Jackson, Kiowa and 1 more	88 min
Jul 2, 7:51 PM CDT	Mesoscale Discussion	SPC	Cimarron, Texas	84 min
Jul 2, 9:19 PM CDT	Mesoscale Discussion	SPC	Beaver, Cimarron, Ellis, Harper, Roger Mills, Texas	56 min
Jul 3, 1:01 AM CDT	Mesoscale Discussion	SPC	Atoka, Caddo, Canadian, Carter, Cleveland, Coal and 35 more	89 min
Jul 3, 1:15 AM CDT	Severe Thunderstorm Watch	SPC	Caddo, Carter, Comanche, Cotton, Garvin, Grady and 10 more	6 hr
Jul 3, 3:32 AM CDT	Mesoscale Discussion	SPC	Carter, Cotton, Jefferson, Love, Tillman	118 min
Jul 3, 6:15 AM CDT	Mesoscale Discussion	SPC	Bryan, Choctaw, Love, Marshall	60 min

Nearby

Mesoscale Discussions in Oklahoma, 2004 Mesoscale Discussions in Missouri, 2004 Mesoscale Discussions in Arkansas, 2004 Every mesoscale discussion in 2004

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.