Alert archive / Oklahoma / Mesoscale Discussions in 2003

Mesoscale Discussion 1811

July 13, 2003Harper County, Kingman County, Kansas; 8 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Jul 13, 2003, 2:56 PM CDT for Harper County, Kingman County, Kansas; 8 counties in Oklahoma. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Jul 13, 2003, 2:56 PM CDT (19:56 UTC)
Expired: Jul 13, 2003, 4:30 PM CDT
In force: 94 min
Issued by: the Storm Prediction Center

Counties Harper County, KS, Kingman County, KS, Alfalfa County, OK, Blaine County, OK, Canadian County, OK, Garfield County, OK, Grant County, OK, Kingfisher County, OK, Logan County, OK, Oklahoma County, OK

The radar

The Vance AFB radar (KVNX), 58 km from the middle of the area, began a volume at 19:54 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 12:00Z, 7.9 hours before the alert went out and 123 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: 244 J/kg
Mixed-layer CIN: -400 J/kg
Mixed-layer LCL: 2387 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 70 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 12, 9:02 PM CDT	Mesoscale Discussion	SPC	Cheyenne, Greeley, Logan, Rawlins, Scott, Sherman and 3 more	118 min
Jul 13, 1:30 PM CDT	Mesoscale Discussion	SPC	Cherokee, Crawford	60 min
Jul 12, 10:12 PM CDT	Mesoscale Discussion	SPC	Cherokee, Creek, Garfield, Grant, Kay, Lincoln and 15 more	2 hr
Jul 12, 11:25 PM CDT	Severe Thunderstorm Watch	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 29 more	6 hr
Jul 13, 2:35 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Comanche and 28 more	115 min
Jul 13, 4:11 AM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Caddo, Canadian, Cleveland, Coal and 29 more	64 min

Nearby

Mesoscale Discussions in Oklahoma, 2003 Mesoscale Discussions in Kansas, 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.