Alert archive / Mississippi / Mesoscale Discussions in 2004

Mesoscale Discussion 2337

October 19, 200416 counties in Alabama; Holmes County, Walton County, Washington County, Florida; 22 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Oct 19, 2004, 11:06 AM CDT for 16 counties in Alabama; Holmes County, Walton County, Washington County, Florida; 22 counties in Mississippi. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued: Oct 19, 2004, 11:06 AM CDT (16:06 UTC)
Expired: Oct 19, 2004, 12:30 PM CDT
In force: 84 min
Issued by: the Storm Prediction Center

All 41 counties

Barbour County, AL, Butler County, AL, Choctaw 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, Monroe County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Holmes County, FL, Walton County, FL, Washington County, FL, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Greene County, MS, Hinds County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 123 km from the middle of the area, began a volume at 16:04 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.

Tornado Watch 866Oct 19, 12:00 PM CDT

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 4.1 hours before the alert went out and 153 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: 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.

Issued	Product	Office	Counties	Lasted
Oct 18, 7:10 PM CDT	Tornado Watch	SPC	Colbert, Fayette, Franklin, Greene, Hale, Lamar and 8 more	4 hr
Oct 18, 10:33 PM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Lauderdale, Limestone	117 min
Oct 18, 10:55 PM CDT	Tornado Watch	SPC	Colbert, Franklin, Lauderdale, Lawrence, Limestone, Madison and 1 more	5 hr
Oct 19, 2:04 AM CDT	Mesoscale Discussion	SPC	Colbert, Franklin, Jackson, Lauderdale, Lawrence, Limestone and 2 more	86 min
Oct 19, 3:34 AM CDT	Mesoscale Discussion	SPC	Colbert, DeKalb, Franklin, Jackson, Lauderdale, Lawrence and 4 more	26 min
Oct 19, 3:50 AM CDT	Severe Thunderstorm Watch	SPC	Cherokee, Colbert, Cullman, DeKalb, Etowah, Franklin and 9 more	4 hr
Oct 19, 7:08 AM CDT	Mesoscale Discussion	SPC	Cherokee, Cullman, DeKalb, Etowah, Franklin, Jackson and 6 more	2 hr
Oct 19, 9:05 AM CDT	Tornado Watch	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Clay and 20 more	7 hr
Oct 19, 12:00 PM CDT	Tornado Watch	SPC	Barbour, Bullock, Butler, Choctaw, Clarke, Coffee and 16 more	7 hr
Oct 19, 1:15 PM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Calhoun, Chambers, Chilton, Clay and 20 more	90 min
Oct 19, 3:08 PM CDT	Mesoscale Discussion	SPC	Autauga, Barbour, Bibb, Bullock, Butler, Calhoun and 43 more	67 min
Oct 19, 3:30 PM CDT	Tornado Watch	SPC	Autauga, Bibb, Chilton, Clay, Coosa, Dallas and 16 more	6 hr
Oct 19, 5:48 PM CDT	Mesoscale Discussion	SPC	Butler, Choctaw, Clarke, Coffee, Conecuh, Covington and 13 more	117 min
Oct 19, 6:20 PM CDT	Tornado Watch	SPC	Barbour, Butler, Choctaw, Clarke, Coffee, Conecuh and 16 more	4 hr
Oct 18, 9:09 PM CDT	Mesoscale Discussion	SPC	Alcorn, Benton	2 hr
Oct 19, 1:35 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Franklin, Hancock, Issaquena, Jefferson and 3 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2004 Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Florida, 2004 Every 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.