Alert archive / Oklahoma / Mesoscale Discussions in 2010

Mesoscale Discussion 511

May 10, 201013 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 10, 2010, 3:40 PM CDT for 13 counties in Oklahoma. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2010, 3:40 PM CDT (20:40 UTC)
Expired: May 10, 2010, 5:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

Counties Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Cotton County, OK, Garfield County, OK, Grady County, OK, Kingfisher County, OK, Logan County, OK, McClain County, OK, Oklahoma County, OK, Stephens County, OK, Tillman County, OK

The radar

The Norman radar (KTLX), 87 km from the middle of the area, began a volume at 20:42 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, 8.7 hours before the alert went out and 76 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: 53 J/kg
Mixed-layer CIN: -331 J/kg
Mixed-layer LCL: 442 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 640 m²/s²
0-3 km storm-relative helicity: 652 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

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
May 10, 10:37 AM CDT	Mesoscale Discussion	SPC	Beaver, Harper	113 min
May 10, 12:46 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Blaine, Garfield, Grant, Kay, Kingfisher and 7 more	119 min
May 10, 1:25 PM CDT	Tornado Watch PDS	SPC	Alfalfa, Blaine, Caddo, Canadian, Carter, Cleveland and 38 more	9 hr
May 10, 2:53 PM CDT	Mesoscale Discussion	SPC	Alfalfa, Garfield, Grant, Kay, Noble, Osage and 3 more	97 min
May 10, 4:42 PM CDT	Mesoscale Discussion	SPC	Canadian, Cleveland, Comanche, Craig, Creek, Garvin and 27 more	63 min
May 10, 5:00 PM CDT	Tornado Watch PDS	SPC	Adair, Atoka, Bryan, Cherokee, Choctaw, Coal and 19 more	6 hr
May 10, 6:45 PM CDT	Mesoscale Discussion	SPC	Atoka, Carter, Cherokee, Coal, Craig, Creek and 26 more	60 min

Nearby

Mesoscale Discussions in Oklahoma, 2010 Every mesoscale discussion in 2010

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.