Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 224

March 12, 200318 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Mar 12, 2003, 8:36 PM CST for 18 counties in Oklahoma. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Mar 12, 2003, 8:36 PM CST (02:36 UTC)
Expired: Mar 12, 2003, 10:00 PM CST
In force: 84 min
Issued by: the Storm Prediction Center

Counties Caddo County, OK, Canadian County, OK, Cleveland County, OK, Creek County, OK, Grady County, OK, Kingfisher County, OK, Lincoln County, OK, Logan County, OK, McClain County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Tulsa County, OK, Washington County, OK

The radar

The Norman radar (KTLX), 65 km from the middle of the area, began a volume at 02:36 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 36Mar 12, 8:55 PM CST

The nearest sounding before it

Norman, OK (KOUN), launched 00:00Z, 2.6 hours before the alert went out and 81 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: 2180 J/kg
Mixed-layer CIN: -23 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 163 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 5.2

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
Mar 12, 7:48 PM CST	Mesoscale Discussion	SPC	Craig, Delaware, Nowata, Osage, Ottawa, Rogers and 1 more	57 min
Mar 12, 8:25 PM CST	Severe Thunderstorm Watch	SPC	Craig, Nowata, Ottawa, Washington	6 hr
Mar 12, 8:55 PM CST	Severe Thunderstorm Watch	SPC	Adair, Blaine, Caddo, Canadian, Cherokee, Cleveland and 27 more	5 hr
Mar 12, 9:52 PM CST	Mesoscale Discussion	SPC	Craig, Nowata, Ottawa, Washington	113 min
Mar 12, 11:03 PM CST	Mesoscale Discussion	SPC	Atoka, Caddo, Carter, Cleveland, Coal, Garvin and 17 more	117 min
Mar 13, 12:56 AM CST	Mesoscale Discussion	SPC	McCurtain	2 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.