Alert archive / Oklahoma / Mesoscale Discussions in 2004

Mesoscale Discussion 1554

July 7, 200418 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2004, 3:10 AM CDT for 18 counties in Oklahoma. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Jul 7, 2004, 3:10 AM CDT (08:10 UTC)
Expired: Jul 7, 2004, 6:15 AM CDT
In force: 3 hr
Issued by: the Storm Prediction Center

Counties Adair County, OK, Cleveland County, OK, Coal County, OK, Creek County, OK, Haskell County, OK, Hughes County, OK, Latimer County, OK, LeFlore County, OK, Lincoln County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Okmulgee County, OK, Pittsburg County, OK, Pontotoc County, OK, Pottawatomie County, OK, Seminole County, OK, Sequoyah County, OK

The radar

The Tulsa radar (KINX), 128 km from the middle of the area, began a volume at 08:09 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, 8.2 hours before the alert went out and 149 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: 3161 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 985 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 130 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
Jul 6, 11:48 PM CDT	Mesoscale Discussion	SPC	Caddo, Comanche, Cotton, Grady, Greer, Harmon and 6 more	87 min
Jul 7, 12:35 AM CDT	Severe Thunderstorm Watch	SPC	Carter, Coal, Comanche, Cotton, Garvin, Jackson and 8 more	5 hr
Jul 7, 1:55 AM CDT	Mesoscale Discussion	SPC	Carter, Comanche, Cotton, Garvin, Harmon, Jackson and 7 more	95 min

Nearby

Mesoscale Discussions in Oklahoma, 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.