Alert archive / Alabama / Mesoscale Discussions in 2009

Mesoscale Discussion 2172

November 10, 200925 counties in Alabama; 21 counties in Georgia

The Storm Prediction Center issued this mesoscale discussion at Nov 10, 2009, 1:23 AM CST for 25 counties in Alabama; 21 counties in Georgia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued: Nov 10, 2009, 1:23 AM CST (07:23 UTC)
Expired: Nov 10, 2009, 4:00 AM CST
In force: 3 hr
Issued by: the Storm Prediction Center

All 46 counties

Autauga County, AL, Barbour County, AL, Bibb County, AL, Bullock County, AL, Chambers County, AL, Chilton County, AL, Clay County, AL, Coffee County, AL, Coosa County, AL, Dale County, AL, Dallas County, AL, Elmore County, AL, Hale County, AL, Henry County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Montgomery County, AL, Perry County, AL, Pike County, AL, Randolph County, AL, Russell County, AL, Shelby County, AL, Talladega County, AL, Tallapoosa County, AL, Chattahoochee County, GA, Clay County, GA, Coweta County, GA, Crawford County, GA, Harris County, GA, Heard County, GA, Lamar County, GA, Macon County, GA, Marion County, GA, Meriwether County, GA, Muscogee County, GA, Peach County, GA, Pike County, GA, Quitman County, GA, Schley County, GA, Stewart County, GA, Talbot County, GA, Taylor County, GA, Troup County, GA, Upson County, GA, Webster County, GA

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 7.4 hours before the alert went out and 130 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: 52 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 880 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 120 m²/s²
0-3 km storm-relative helicity: -3 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
Nov 9, 10:05 PM CST	Mesoscale Discussion	SPC	Baldwin, Conecuh, Covington, Escambia	3 hr
Nov 10, 4:27 AM CST	Mesoscale Discussion	SPC	Coffee, Covington, Geneva, Houston	93 min

Nearby

Mesoscale Discussions in Alabama, 2009 Mesoscale Discussions in Georgia, 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.