Alert archive / Oklahoma / Mesoscale Discussions in 2005

Mesoscale Discussion 2207

September 14, 200541 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2005, 11:29 PM CDT for 41 counties in Oklahoma. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Sep 14, 2005, 11:29 PM CDT (04:29 UTC)
Expired: Sep 15, 2005, 1:00 AM CDT
In force: 91 min
Issued by: the Storm Prediction Center

All 41 counties

Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Cherokee County, OK, Cleveland County, OK, Craig County, OK, Creek County, OK, Custer County, OK, Delaware County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grady County, OK, Greer County, OK, Haskell County, OK, Kingfisher County, OK, Kiowa County, OK, Lincoln County, OK, Logan County, OK, Major County, OK, Mayes County, OK, McClain County, OK, McIntosh County, OK, Muskogee County, OK, Noble County, OK, Okfuskee County, OK, Oklahoma County, OK, Okmulgee County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Pottawatomie County, OK, Roger Mills County, OK, Rogers County, OK, Seminole County, OK, Tulsa County, OK, Wagoner County, OK, Washington County, OK, Washita County, OK, Woodward County, OK

The radar

The Norman radar (KTLX), 54 km from the middle of the area, began a volume at 04:28 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 792Sep 15, 3:00 AM CDT

The nearest sounding before it

Lamont, OK (KLMN), launched 00:00Z, 4.5 hours before the alert went out and 115 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: 1636 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 842 m above ground
0-6 km bulk shear: 61 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 220 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 3.8

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
Sep 14, 7:05 PM CDT	Severe Thunderstorm Watch	SPC	Adair, Beckham, Blaine, Caddo, Canadian, Cherokee and 42 more	8 hr
Sep 14, 9:11 PM CDT	Mesoscale Discussion	SPC	Carter, Cotton, Garvin, Jefferson, Murray, Stephens and 1 more	64 min
Sep 15, 2:35 AM CDT	Mesoscale Discussion	SPC	Adair, Atoka, Blaine, Bryan, Caddo, Canadian and 56 more	25 min
Sep 15, 3:00 AM CDT	Severe Thunderstorm Watch	SPC	Caddo, Canadian, Carter, Cherokee, Cleveland, Coal and 37 more	7 hr
Sep 15, 6:48 AM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Caddo, Carter, Choctaw, Cleveland and 27 more	27 min

Nearby

Mesoscale Discussions in Oklahoma, 2005 Every mesoscale discussion in 2005

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.