Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 2049

October 2, 200716 counties in Oklahoma

The Storm Prediction Center issued this mesoscale discussion at Oct 2, 2007, 2:31 PM CDT for 16 counties in Oklahoma. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Oct 2, 2007, 2:31 PM CDT (19:31 UTC)
Expired: Oct 2, 2007, 4:00 PM CDT
In force: 89 min
Issued by: the Storm Prediction Center

Counties Beckham County, OK, Blaine County, OK, Custer County, OK, Dewey County, OK, Garfield County, OK, Grant County, OK, Kay County, OK, Kingfisher County, OK, Logan County, OK, Major County, OK, Noble County, OK, Osage County, OK, Pawnee County, OK, Payne County, OK, Roger Mills County, OK, Washington County, OK

The radar

The Vance AFB radar (KVNX), 76 km from the middle of the area, began a volume at 19:33 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 700Oct 2, 3:00 PM CDT

The nearest sounding before it

Lamont, OK (KLMN), launched 12:00Z, 7.5 hours before the alert went out and 53 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: 1199 J/kg
Mixed-layer CIN: -74 J/kg
Mixed-layer LCL: 1024 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 168 m²/s²
0-3 km storm-relative helicity: 170 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.6

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
Oct 2, 2:32 PM CDT	Mesoscale Discussion	SPC	Craig, Delaware, Mayes, Ottawa, Rogers	118 min
Oct 2, 2:56 PM CDT	Severe Thunderstorm Watch	SPC	Blaine, Craig, Creek, Delaware, Garfield, Kay and 13 more	7 hr
Oct 2, 6:53 PM CDT	Mesoscale Discussion	SPC	Craig, Creek, Delaware, Lincoln, Mayes, Nowata and 6 more	97 min

Nearby

Mesoscale Discussions in Oklahoma, 2007 Every mesoscale discussion in 2007

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.