Alert archive / Alabama / Mesoscale Discussions in 2003

Mesoscale Discussion 2522

November 18, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Nov 18, 2003, 10:30 AM CST for 4 states. It was in force for 90 min.

The area

The outline as issued.

The facts

Issued
Nov 18, 2003, 10:30 AM CST (16:30 UTC)
Expired
Nov 18, 2003, 12:00 PM CST
In force
90 min
Issued by
the Storm Prediction Center
All 40 counties

Baldwin County, AL, Bibb County, AL, Blount County, AL, Butler County, AL, Chilton County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Cullman County, AL, Dallas County, AL, Escambia County, AL, Fayette County, AL, Franklin County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lawrence County, AL, Marengo County, AL, Marion County, AL, Mobile County, AL, Monroe County, AL, Morgan County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Tuscaloosa County, AL, Walker County, AL, Washington County, AL, Wilcox County, AL, Winston County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Saint Bernard Parish, LA, George County, MS, Greene County, MS, Harrison County, MS, Jackson County, MS

The radar

The Birmingham radar (KBMX), 101 km from the middle of the area, began a volume at 16:31 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 4.5 hours before the alert went out and 101 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 12:00Z on 2003-11-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2003-11-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 319 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1123 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
319 m²/s²
0-3 km storm-relative helicity
389 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
Nov 18, 6:08 AM CSTMesoscale DiscussionSPCChoctaw, Colbert, Franklin, Lamar, Marion, Pickens and 1 more2 hr
Nov 18, 6:55 AM CSTTornado WatchSPCChoctaw, Colbert, Fayette, Franklin, Greene, Lamar and 9 more5 hr
Nov 18, 8:58 AM CSTMesoscale DiscussionSPCBaldwin, Butler, Coffee, Conecuh, Covington, Crenshaw and 4 more92 min
Nov 18, 11:25 AM CSTTornado WatchSPCAutauga, Baldwin, Bibb, Blount, Butler, Calhoun and 38 more6 hr
Nov 18, 1:33 PM CSTMesoscale DiscussionSPCDeKalb, Jackson, Madison57 min
Nov 18, 1:55 PM CSTTornado WatchSPCDeKalb, Jackson5 hr
Nov 18, 1:59 PM CSTMesoscale DiscussionSPCAutauga, Barbour, Bullock, Butler, Calhoun, Chambers and 23 more91 min
Nov 18, 4:31 PM CSTMesoscale DiscussionSPCBarbour, Bullock, Butler, Chambers, Clay, Cleburne and 16 more29 min
Nov 18, 4:55 PM CSTTornado WatchSPCBarbour, Bullock, Chambers, Coffee, Covington, Crenshaw and 11 more5 hr
Nov 17, 7:48 PM CSTMesoscale DiscussionSPCBossier, Caddo, Claiborne, Webster87 min
Nov 17, 8:10 PM CSTMesoscale DiscussionSPCBeauregard, Calcasieu, Natchitoches, Sabine, Vernon95 min
Nov 17, 9:25 PM CSTTornado WatchSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 12 more7 hr
Nov 17, 10:53 PM CSTMesoscale DiscussionSPCBeauregard, Calcasieu97 min
Nov 17, 11:44 PM CSTMesoscale DiscussionSPCBienville, Bossier, Caldwell, Claiborne, De Soto, Grant and 11 more91 min
Nov 17, 11:50 PM CSTTornado WatchSPCAcadia, Allen, Beauregard, Calcasieu, Cameron, Evangeline and 2 more5 hr
Nov 18, 2:08 AM CSTMesoscale DiscussionSPCAscension, Assumption, Avoyelles, Catahoula, Concordia, East Baton Rouge and 25 more97 min
Nov 18, 2:25 AM CSTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 32 more6 hr
Nov 18, 4:48 AM CSTMesoscale DiscussionSPCAscension, Assumption, Concordia, East Baton Rouge, East Feliciana, Iberville and 17 more117 min
Nov 18, 1:29 AM CSTMesoscale DiscussionSPCBolivar, Coahoma, DeSoto, Leflore, Marshall, Panola and 5 more3 hr
Nov 18, 1:55 AM CSTTornado WatchSPCBolivar, Coahoma, DeSoto, Holmes, Humphreys, Leflore and 7 more6 hr
Nov 18, 2:50 PM CSTSevere Thunderstorm WatchSPCBolivar, Washington5 hr

Nearby

Mesoscale Discussions in Alabama, 2003Mesoscale Discussions in Mississippi, 2003Mesoscale Discussions in Florida, 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.