Alert archive / Alabama / Mesoscale Discussions in 2004

Mesoscale Discussion 2343

October 19, 200419 counties in Alabama; Holmes County, Florida; 16 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Oct 19, 2004, 5:48 PM CDT for 19 counties in Alabama; Holmes County, Florida; 16 counties in Mississippi. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Oct 19, 2004, 5:48 PM CDT (22:48 UTC)
Expired
Oct 19, 2004, 7:45 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 36 counties

Butler County, AL, Choctaw County, AL, Clarke County, AL, Coffee County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Dale County, AL, Dallas County, AL, Escambia County, AL, Geneva County, AL, Lowndes County, AL, Marengo County, AL, Monroe County, AL, Montgomery County, AL, Pike County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Holmes County, FL, Clarke County, MS, Covington County, MS, Hinds County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 139 km from the middle of the area, began a volume at 22:47 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

Jackson, MS (KJAN), launched 12:00Z, 10.8 hours before the alert went out and 167 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, Jackson, MS at 12:00Z on 2004-10-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2735 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, Jackson, MS at 12:00Z on 2004-10-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 188 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
2735 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
501 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
188 m²/s²
0-3 km storm-relative helicity
247 m²/s²
Significant tornado parameter
3.8
Supercell composite
16.1

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
Oct 18, 7:10 PM CDTTornado WatchSPCColbert, Fayette, Franklin, Greene, Hale, Lamar and 8 more4 hr
Oct 18, 10:33 PM CDTMesoscale DiscussionSPCColbert, Franklin, Lauderdale, Limestone117 min
Oct 18, 10:55 PM CDTTornado WatchSPCColbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more5 hr
Oct 19, 2:04 AM CDTMesoscale DiscussionSPCColbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more86 min
Oct 19, 3:34 AM CDTMesoscale DiscussionSPCColbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 4 more26 min
Oct 19, 3:50 AM CDTSevere Thunderstorm WatchSPCCherokee, Colbert, Cullman, DeKalb, Etowah, Franklin and 9 more4 hr
Oct 19, 7:08 AM CDTMesoscale DiscussionSPCCherokee, Cullman, DeKalb, Etowah, Franklin, Jackson and 6 more2 hr
Oct 19, 9:05 AM CDTTornado WatchSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 20 more7 hr
Oct 19, 11:06 AM CDTMesoscale DiscussionSPCBarbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 10 more84 min
Oct 19, 12:00 PM CDTTornado WatchSPCBarbour, Bullock, Butler, Choctaw, Clarke, Coffee and 16 more7 hr
Oct 19, 1:15 PM CDTMesoscale DiscussionSPCAutauga, Bibb, Calhoun, Chambers, Chilton, Clay and 20 more90 min
Oct 19, 3:08 PM CDTMesoscale DiscussionSPCAutauga, Barbour, Bibb, Bullock, Butler, Calhoun and 43 more67 min
Oct 19, 3:30 PM CDTTornado WatchSPCAutauga, Bibb, Chilton, Clay, Coosa, Dallas and 16 more6 hr
Oct 19, 6:20 PM CDTTornado WatchSPCBarbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 16 more4 hr
Oct 18, 9:09 PM CDTMesoscale DiscussionSPCAlcorn, Benton2 hr
Oct 19, 1:35 PM CDTMesoscale DiscussionSPCAdams, Amite, Franklin, Hancock, Issaquena, Jefferson and 3 more2 hr

Nearby

Mesoscale Discussions in Alabama, 2004Mesoscale Discussions in Mississippi, 2004Mesoscale Discussions in Florida, 2004Every mesoscale discussion in 2004

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.