Alert archive / Alabama / Mesoscale Discussions in 2006

Mesoscale Discussion 2033

September 23, 200611 counties in Alabama; 8 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Sep 23, 2006, 6:25 PM CDT for 11 counties in Alabama; 8 counties in Mississippi. It was in force for 65 min.

The area

The outline as issued.

The facts

Issued: Sep 23, 2006, 6:25 PM CDT (23:25 UTC)
Expired: Sep 23, 2006, 7:30 PM CDT
In force: 65 min
Issued by: the Storm Prediction Center

Counties Cullman County, AL, DeKalb County, AL, Franklin County, AL, Jackson County, AL, Lawrence County, AL, Limestone County, AL, Madison County, AL, Marion County, AL, Marshall County, AL, Morgan County, AL, Winston County, AL, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, Grenada County, MS, Itawamba County, MS, Monroe County, MS, Montgomery County, MS, Webster County, MS

The radar

The Columbus AFB radar (KGWX), 46 km from the middle of the area, began a volume at 23:26 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

Little Rock, AR (KLZK), launched 12:00Z, 11.4 hours before the alert went out and 189 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: 1990 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 822 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 328 m²/s²
0-3 km storm-relative helicity: 361 m²/s²
Significant tornado parameter: 3.5
Supercell composite: 15.8

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
Sep 23, 11:53 AM CDT	Mesoscale Discussion	SPC	Blount, Cullman, DeKalb, Etowah, Fayette, Jackson and 9 more	67 min
Sep 23, 1:37 PM CDT	Mesoscale Discussion	SPC	Colbert, Lauderdale	83 min
Sep 23, 2:59 PM CDT	Severe Thunderstorm Watch	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Marion	5 hr
Sep 23, 5:50 PM CDT	Mesoscale Discussion	SPC	Cullman, DeKalb, Franklin, Jackson, Lawrence, Limestone and 5 more	55 min
Sep 23, 7:35 AM CDT	Mesoscale Discussion	SPC	DeSoto, Tunica	85 min
Sep 23, 10:51 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Coahoma, DeSoto, Marshall, Panola and 4 more	114 min

Nearby

Mesoscale Discussions in Alabama, 2006 Mesoscale Discussions in Mississippi, 2006 Every mesoscale discussion in 2006

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.