Alert archive / Florida / Mesoscale Discussions in 2009

Mesoscale Discussion 2173

November 10, 20094 counties in Alabama; 11 counties in Florida; Decatur County, Seminole County, Georgia

The Storm Prediction Center issued this mesoscale discussion at Nov 10, 2009, 4:27 AM CST for 4 counties in Alabama; 11 counties in Florida; Decatur County, Seminole County, Georgia. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued: Nov 10, 2009, 4:27 AM CST (10:27 UTC)
Expired: Nov 10, 2009, 6:00 AM CST
In force: 93 min
Issued by: the Storm Prediction Center

Counties Coffee County, AL, Covington County, AL, Geneva County, AL, Houston County, AL, Bay County, FL, Calhoun County, FL, Gadsden County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Leon County, FL, Liberty County, FL, Wakulla County, FL, Walton County, FL, Washington County, FL, Decatur County, GA, Seminole County, GA

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 10.5 hours before the alert went out and 317 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, 1:23 AM CST	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Chambers, Chilton and 19 more	3 hr

Nearby

Mesoscale Discussions in Florida, 2009 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.