Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 304

April 9, 20044 states

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2004, 1:00 PM CDT for 4 states. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Apr 9, 2004, 1:00 PM CDT (18:00 UTC)
Expired: Apr 9, 2004, 3:30 PM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

All 39 counties

Benton County, AR, Washington County, AR, Chautauqua County, KS, Cherokee County, KS, Cowley County, KS, Crawford County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Jasper County, MO, McDonald County, MO, Newton County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Creek County, OK, Delaware County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Nowata County, OK, Okfuskee County, OK, Okmulgee County, OK, Osage County, OK, Ottawa County, OK, Pawnee County, OK, Payne County, OK, Rogers County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 6.0 hours before the alert went out and 151 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2153 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 160 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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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 9, 3:32 PM CDT	Mesoscale Discussion	SPC	Crawford, Franklin, Logan, Montgomery, Polk, Scott and 3 more	88 min
Apr 9, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	Conway, Crawford, Franklin, Garland, Hot Spring, Johnson and 10 more	5 hr
Apr 9, 1:51 PM CDT	Mesoscale Discussion	SPC	Atoka, Beckham, Blaine, Caddo, Canadian, Cleveland and 27 more	114 min
Apr 9, 2:15 PM CDT	Severe Thunderstorm Watch	SPC	Atoka, Beckham, Blaine, Bryan, Caddo, Canadian and 27 more	6 hr
Apr 9, 4:20 PM CDT	Mesoscale Discussion	SPC	Cimarron	115 min

Nearby

Mesoscale Discussions in Oklahoma, 2004 Mesoscale Discussions in Kansas, 2004 Mesoscale Discussions in Missouri, 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.