Alert archive / Alabama / Mesoscale Discussions in 2003

Mesoscale Discussion 200

March 6, 200323 counties in Alabama; Troup County, Georgia; 9 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 6, 2003, 3:30 AM CST for 23 counties in Alabama; Troup County, Georgia; 9 counties in Mississippi. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Mar 6, 2003, 3:30 AM CST (09:30 UTC)
Expired
Mar 6, 2003, 5:00 AM CST
In force
90 min
Issued by
the Storm Prediction Center
All 33 counties

Autauga County, AL, Bibb County, AL, Butler County, AL, Chambers County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Clay County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Lee County, AL, Lowndes County, AL, Macon County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Perry County, AL, Randolph County, AL, Talladega County, AL, Tallapoosa County, AL, Washington County, AL, Wilcox County, AL, Troup County, GA, Clarke County, MS, Covington County, MS, Forrest County, MS, Greene County, MS, Jones County, MS, Lamar County, MS, Marion County, MS, Perry County, MS, Wayne County, MS

The radar

The Birmingham radar (KBMX), 132 km from the middle of the area, began a volume at 09:33 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, 9.5 hours before the alert went out and 132 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2003-03-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2003-03-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 131 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
1 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
446 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
131 m²/s²
0-3 km storm-relative helicity
245 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.

IssuedProductOfficeCountiesLasted
Mar 5, 6:58 PM CSTMesoscale DiscussionSPCBibb, Chilton, Perry62 min
Mar 5, 8:10 PM CSTSevere Thunderstorm WatchSPCAutauga, Calhoun, Chambers, Clay, Cleburne, Coosa and 9 more4 hr
Mar 5, 9:49 PM CSTMesoscale DiscussionSPCBlount, Calhoun, Cherokee, Colbert, Cullman, DeKalb and 16 more116 min
Mar 6, 5:39 AM CSTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Chambers, Clarke and 16 more96 min
Mar 6, 7:37 AM CSTMesoscale DiscussionSPCBarbour, Bullock, Chambers, Crenshaw, Elmore, Lee and 5 more83 min
Mar 5, 7:57 PM CSTMesoscale DiscussionSPCBaldwin, Barrow, Bartow, Butts, Carroll, Cherokee and 34 more63 min
Mar 5, 9:28 PM CSTMesoscale DiscussionSPCBibb, Butts, Clayton, Crawford, DeKalb, Fayette and 19 more62 min
Mar 5, 9:52 PM CSTMesoscale DiscussionSPCBurke, Columbia, Emanuel, Glascock, Jefferson, Jenkins and 7 more53 min
Mar 5, 10:35 PM CSTSevere Thunderstorm WatchSPCBaldwin, Barrow, Bibb, Burke, Butts, Clarke and 36 more5 hr
Mar 5, 11:45 PM CSTMesoscale DiscussionSPCBurke, Columbia, Glascock, Jefferson, Lincoln, McDuffie and 4 more60 min
Mar 6, 2:16 AM CSTMesoscale DiscussionSPCBaldwin, Barrow, Bibb, Burke, Butts, Clarke and 36 more59 min
Mar 6, 11:58 AM CSTMesoscale DiscussionSPCAtkinson, Bacon, Berrien, Brantley, Brooks, Camden and 15 more2 hr
Mar 6, 4:55 PM CSTMesoscale DiscussionSPCForrest, Lamar, Marion, Pearl River2 hr

Nearby

Mesoscale Discussions in Alabama, 2003Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Georgia, 2003Every mesoscale discussion in 2003

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.