Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 1755

July 9, 200332 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 9, 2003, 11:22 PM CDT for 32 counties in Oklahoma. It was in force for 53 min.

The area

The outline as issued.

The facts

Issued: Jul 9, 2003, 11:22 PM CDT (04:22 UTC)
Expired: Jul 10, 2003, 12:15 AM CDT
In force: 53 min
Issued by: the Storm Prediction Center

All 32 counties

Adair County, OK, Caddo County, OK, Canadian County, OK, Cherokee County, OK, Cleveland County, OK, Creek County, OK, Custer County, OK, Delaware County, OK, Grady County, OK, Haskell County, OK, Hughes County, OK, Kiowa County, OK, Latimer County, OK, Lincoln County, OK, Logan County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pawnee County, OK, Payne County, OK, Pittsburg County, OK, Pottawatomie County, OK, Rogers County, OK, Seminole County, OK, Sequoyah County, OK, Tulsa County, OK, Wagoner County, OK, Washita County, OK

The radar

The Norman radar (KTLX), 42 km from the middle of the area, began a volume at 04:23 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, 4.4 hours before the alert went out and 59 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: 2350 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 1484 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 9.2

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 9, 8:50 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cherokee, Cleveland and 38 more	5 hr
Jul 9, 8:56 PM CDT	Mesoscale Discussion	SPC	Ottawa	94 min
Jul 9, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	Craig, Kay, Nowata, Osage, Ottawa, Washington	6 hr
Jul 9, 11:10 PM CDT	Severe Thunderstorm Watch	SPC	Beckham, Greer, Harmon, Jackson, Roger Mills	3 hr

Nearby

Mesoscale Discussions in Oklahoma, 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.