Alert archive / Alabama / Mesoscale Discussions in 2008

Mesoscale Discussion 37

January 8, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Jan 8, 2008, 9:32 PM CST for 4 states. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jan 8, 2008, 9:32 PM CST (03:32 UTC)
Expired: Jan 8, 2008, 10:30 PM CST
In force: 58 min
Issued by: the Storm Prediction Center

All 45 counties

Bibb County, AL, Blount County, AL, Chilton County, AL, Choctaw County, AL, Cullman County, AL, DeKalb County, AL, Etowah County, AL, Greene County, AL, Hale County, AL, Jackson County, AL, Jefferson County, AL, Madison County, AL, Marengo County, AL, Marshall County, AL, Perry County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Tuscaloosa County, AL, Dade County, GA, Clarke County, MS, Forrest County, MS, Jones County, MS, Lamar County, MS, Marion County, MS, Perry County, MS, Wayne County, MS, Bledsoe County, TN, Cannon County, TN, Coffee County, TN, Cumberland County, TN, DeKalb County, TN, Fentress County, TN, Franklin County, TN, Grundy County, TN, Hamilton County, TN, Jackson County, TN, Marion County, TN, Moore County, TN, Overton County, TN, Putnam County, TN, Sequatchie County, TN, Van Buren County, TN, Warren County, TN, White County, TN

The radar

The Birmingham radar (KBMX), 56 km from the middle of the area, began a volume at 03:34 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

Birmingham, AL (KBMX), launched 00:00Z, 3.5 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: 9 J/kg
Mixed-layer CIN: -111 J/kg
Mixed-layer LCL: 864 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 289 m²/s²
0-3 km storm-relative helicity: 336 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
Jan 8, 6:36 PM CST	Tornado Watch	SPC	Blount, Choctaw, Colbert, Cullman, Fayette, Franklin and 16 more	6 hr

Nearby

Mesoscale Discussions in Alabama, 2008 Mesoscale Discussions in Tennessee, 2008 Mesoscale Discussions in Mississippi, 2008 Every mesoscale discussion in 2008

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.