Alert archive / Oklahoma / Mesoscale Discussions in 2007

Mesoscale Discussion 759

May 9, 2007Logan County, Noble County, Oklahoma

The Storm Prediction Center issued this mesoscale discussion at May 9, 2007, 1:04 AM CDT for Logan County, Noble County, Oklahoma. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: May 9, 2007, 1:04 AM CDT (06:04 UTC)
Expired: May 9, 2007, 2:30 AM CDT
In force: 86 min
Issued by: the Storm Prediction Center

Counties Logan County, OK, Noble County, OK

The radar

The Norman radar (KTLX), 89 km from the middle of the area, began a volume at 06:06 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

Lamont, OK (KLMN), launched 00:00Z, 6.1 hours before the alert went out and 55 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: 544 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 604 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

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 8, 7:30 PM CDT	Mesoscale Discussion	SPC	Atoka, Bryan, Canadian, Carter, Cleveland, Coal and 12 more	60 min
May 8, 7:54 PM CDT	Tornado Watch	SPC	Atoka, Bryan, Canadian, Carter, Choctaw, Cleveland and 23 more	4 hr
May 8, 10:08 PM CDT	Mesoscale Discussion	SPC	Canadian, Cleveland, Garvin, McClain, Murray, Oklahoma	67 min
May 9, 4:00 PM CDT	Mesoscale Discussion	SPC	Craig, Nowata, Ottawa	2 hr

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.