Alert archive / Texas / Mesoscale Discussions in 2009

Mesoscale Discussion 72

February 8, 20095 counties in Oklahoma; 19 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 8, 2009, 9:48 PM CST for 5 counties in Oklahoma; 19 counties in Texas. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Feb 8, 2009, 9:48 PM CST (03:48 UTC)
Expired: Feb 8, 2009, 11:15 PM CST
In force: 87 min
Issued by: the Storm Prediction Center

All 24 counties

Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Roger Mills County, OK, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Fisher County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Jones County, TX, King County, TX, Knox County, TX, Nolan County, TX, Roberts County, TX, Runnels County, TX, Stonewall County, TX, Taylor County, TX, Wheeler County, TX

The radar

The Altus AFB radar (KFDR), 130 km from the middle of the area, began a volume at 03:45 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

Amarillo Airport, TX (KAMA), launched 00:00Z, 3.8 hours before the alert went out and 224 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: 1 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 940 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 214 m²/s²
0-3 km storm-relative helicity: 193 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
Feb 8, 7:03 PM CST	Mesoscale Discussion	SPC	Andrews, Bailey, Castro, Cochran, Crane, Dawson and 20 more	87 min
Feb 8, 7:59 PM CST	Mesoscale Discussion	SPC	Armstrong, Briscoe, Crosby, Dickens, Donley, Floyd and 5 more	61 min

Nearby

Mesoscale Discussions in Texas, 2009 Mesoscale Discussions in Oklahoma, 2009 Every mesoscale discussion in 2009

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.