Alert archive / Mississippi / Mesoscale Discussions in 2004

Mesoscale Discussion 1710

July 16, 200411 counties in Arkansas; 10 parishes in Louisiana; 43 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jul 16, 2004, 3:03 PM CDT for 11 counties in Arkansas; 10 parishes in Louisiana; 43 counties in Mississippi. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
Jul 16, 2004, 3:03 PM CDT (20:03 UTC)
Expired
Jul 16, 2004, 5:00 PM CDT
In force
117 min
Issued by
the Storm Prediction Center
All 64 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Chicot County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Jefferson County, AR, Lincoln County, AR, Phillips County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Adams County, MS, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lafayette County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Panola County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Yalobusha County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 126 km from the middle of the area, began a volume at 20:05 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

Jackson, MS (KJAN), launched 12:00Z, 8.1 hours before the alert went out and 117 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 2004-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3154 joules per kilogram.LCLLFCEL10008507005003002001001 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 2004-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 70 square meters per square second.193958Sfc1 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
3154 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
876 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
70 m²/s²
0-3 km storm-relative helicity
93 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.4

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
Jul 15, 7:34 PM CDTMesoscale DiscussionSPCAshley, Chicot, Drew86 min
Jul 15, 8:01 PM CDTMesoscale DiscussionSPCBenton, Bradley, Calhoun, Carroll, Clark, Cleveland and 34 more119 min
Jul 16, 8:35 AM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Boone, Calhoun, Carroll, Clark and 43 more4 hr
Jul 16, 12:23 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Desha, Drew, Jefferson and 4 more97 min
Jul 16, 12:45 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more6 hr
Jul 16, 3:37 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 32 more113 min
Jul 16, 6:44 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 6 more61 min
Jul 16, 11:42 AM CDTMesoscale DiscussionSPCWashington3 hr

Nearby

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