Alert archive / Mississippi / Mesoscale Discussions in 2004

Mesoscale Discussion 1698

July 15, 20046 states

The Storm Prediction Center issued this mesoscale discussion at Jul 15, 2004, 7:34 PM CDT for 6 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued: Jul 15, 2004, 7:34 PM CDT (00:34 UTC)
Expired: Jul 15, 2004, 9:00 PM CDT
In force: 86 min
Issued by: the Storm Prediction Center

All 69 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, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Pike County, AL, Washington County, AL, Wilcox County, AL, Ashley County, AR, Chicot County, AR, Drew County, AR, Gadsden County, FL, Holmes County, FL, Jackson County, FL, Washington County, FL, Clay County, GA, Decatur County, GA, Early County, GA, Grady County, GA, Miller County, GA, Seminole County, GA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Perry County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Warren County, MS, Washington County, MS, Wayne County, MS, Yazoo County, MS

The radar

The Mobile radar (KMOB), 120 km from the middle of the area, began a volume at 00:33 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 0.6 hours before the alert went out and 260 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: 5843 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 883 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 45 m²/s²
0-3 km storm-relative helicity: 54 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.3

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
Jul 16, 11:42 AM CDT	Mesoscale Discussion	SPC	Choctaw, Sumter, Washington	3 hr
Jul 15, 8:01 PM CDT	Mesoscale Discussion	SPC	Benton, Bradley, Calhoun, Carroll, Clark, Cleveland and 34 more	119 min
Jul 16, 8:35 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Baxter, Boone, Calhoun, Carroll, Clark and 43 more	4 hr
Jul 16, 12:23 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Chicot, Desha, Drew, Jefferson and 4 more	97 min
Jul 16, 12:45 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more	6 hr
Jul 16, 3:03 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Chicot, Cleveland, Desha and 5 more	117 min
Jul 16, 3:37 PM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 32 more	113 min
Jul 16, 6:44 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 6 more	61 min

Nearby

Mesoscale Discussions in Mississippi, 2004 Mesoscale Discussions in Alabama, 2004 Mesoscale Discussions in Louisiana, 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.