Alert archive / Alabama / Mesoscale Discussions in 2006

Mesoscale Discussion 818

May 9, 20064 states

The Storm Prediction Center issued this mesoscale discussion at May 9, 2006, 9:54 PM CDT for 4 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 9, 2006, 9:54 PM CDT (02:54 UTC)
Expired: May 10, 2006, 12:00 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 46 counties

Baldwin County, AL, Barbour County, AL, Butler County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Lowndes County, AL, Mobile County, AL, Monroe County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Calhoun County, FL, Escambia County, FL, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Jefferson County, FL, Leon County, FL, Liberty County, FL, Madison County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Baker County, GA, Brooks County, GA, Calhoun County, GA, Clay County, GA, Colquitt County, GA, Decatur County, GA, Early County, GA, Grady County, GA, Miller County, GA, Mitchell County, GA, Seminole County, GA, Thomas County, GA, George County, MS, Greene County, MS

The radar

The Eglin Afb radar (KEVX), 68 km from the middle of the area, began a volume at 02:57 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

Tallahassee Rgnl, FL (KTLH), launched 00:00Z, 2.9 hours before the alert went out and 202 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: 126 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 1390 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 9 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
May 10, 2:05 AM CDT	Mesoscale Discussion	SPC	Colbert, Fayette, Franklin, Lamar, Lauderdale, Lawrence and 3 more	55 min
May 10, 2:24 AM CDT	Severe Thunderstorm Watch	SPC	Colbert, Fayette, Franklin, Greene, Hale, Lamar and 5 more	5 hr
May 10, 4:01 AM CDT	Mesoscale Discussion	SPC	Fayette, Greene, Hale, Lamar, Pickens, Sumter and 1 more	89 min
May 10, 5:47 AM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Chilton and 30 more	88 min
May 10, 6:32 AM CDT	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Chambers and 25 more	6 hr
May 10, 8:31 AM CDT	Mesoscale Discussion	SPC	Fayette, Greene, Lamar, Pickens, Tuscaloosa	89 min
May 10, 9:48 AM CDT	Severe Thunderstorm Watch	SPC	Colbert, Cullman, Fayette, Franklin, Greene, Hale and 12 more	5 hr
May 10, 12:21 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Blount, Calhoun, Chambers, Cherokee and 18 more	84 min
May 10, 12:31 PM CDT	Severe Thunderstorm Watch	SPC	Autauga, Bibb, Blount, Bullock, Calhoun, Chambers and 18 more	5 hr
May 10, 12:42 PM CDT	Mesoscale Discussion	SPC	Barbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 11 more	93 min
May 10, 1:45 PM CDT	Tornado Watch	SPC	Autauga, Baldwin, Barbour, Bullock, Butler, Choctaw and 26 more	7 hr
May 10, 2:42 PM CDT	Mesoscale Discussion	SPC	Choctaw, Clarke, Marengo, Sumter, Washington, Wilcox	2 hr
May 10, 3:23 PM CDT	Mesoscale Discussion	SPC	Barbour, Chambers, Lee, Macon, Russell	2 hr
May 10, 6:20 PM CDT	Mesoscale Discussion	SPC	Baker, Duval, Nassau	55 min
May 10, 6:40 PM CDT	Severe Thunderstorm Watch	SPC	Baker, Duval, Nassau	4 hr
May 10, 4:00 PM CDT	Severe Thunderstorm Watch	SPC	Baker, Ben Hill, Berrien, Bleckley, Brooks, Calhoun and 40 more	7 hr
May 10, 12:41 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Bolivar, Carroll, Coahoma, DeSoto, Grenada and 13 more	7 hr
May 10, 6:27 AM CDT	Mesoscale Discussion	SPC	Bolivar, Coahoma, DeSoto, Leflore, Panola, Quitman and 5 more	93 min
May 10, 10:57 AM CDT	Mesoscale Discussion	SPC	Attala, Claiborne, Copiah, Covington, Franklin, Hinds and 19 more	2 hr
May 10, 11:09 AM CDT	Severe Thunderstorm Watch	SPC	Bolivar, Coahoma, Humphreys, Leflore, Quitman, Sharkey and 3 more	3 hr
May 10, 12:03 PM CDT	Tornado Watch	SPC	Adams, Claiborne, Clarke, Copiah, Covington, Franklin and 21 more	9 hr
May 10, 6:05 PM CDT	Mesoscale Discussion	SPC	Amite, Pike, Walthall, Wilkinson	85 min

Nearby

Mesoscale Discussions in Alabama, 2006 Mesoscale Discussions in Florida, 2006 Mesoscale Discussions in Georgia, 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.