Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 2078

August 4, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Aug 4, 2003, 1:48 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Aug 4, 2003, 1:48 PM CDT (18:48 UTC)
Expired: Aug 4, 2003, 4:15 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 39 counties

Benton County, AR, Carroll County, AR, Crawford County, AR, Franklin County, AR, Johnson County, AR, Logan County, AR, Madison County, AR, Newton County, AR, Pope County, AR, Scott County, AR, Sebastian County, AR, Washington County, AR, Chautauqua County, KS, Cherokee County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Barry County, MO, Jasper County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Stone County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, LeFlore County, OK, Mayes County, OK, Muskogee County, OK, Nowata County, OK, Ottawa County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The radar

The Tulsa radar (KINX), 91 km from the middle of the area, began a volume at 18:49 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.

Severe Thunderstorm Watch 837Aug 4, 5:30 PM CDT

The nearest sounding before it

Springfield, MO (KSGF), launched 12:00Z, 6.8 hours before the alert went out and 107 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: 1111 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 938 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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
Aug 4, 1:43 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Greene, Mississippi	2 hr
Aug 4, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Clay, Cleburne, Craighead, Crittenden, Cross and 15 more	6 hr
Aug 4, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Boone, Carroll, Conway, Johnson, Madison and 5 more	6 hr
Aug 4, 2:15 PM CDT	Mesoscale Discussion	SPC	Finney, Gove, Greeley, Hamilton, Kearny, Lane and 7 more	2 hr
Aug 4, 4:40 PM CDT	Mesoscale Discussion	SPC	Barber, Clark, Comanche	2 hr
Aug 4, 5:11 PM CDT	Mesoscale Discussion	SPC	Linn, Miami	94 min
Aug 4, 5:05 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 14 more	6 hr

Nearby

Mesoscale Discussions in Oklahoma, 2003 Mesoscale Discussions in Arkansas, 2003 Mesoscale Discussions in Kansas, 2003 Every mesoscale discussion in 2003

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.