Alert archive / Arkansas / Mesoscale Discussions in 2004
Mesoscale Discussion 2389
The Storm Prediction Center issued this mesoscale discussion at Nov 1, 2004, 1:11 PM CST for 14 counties in Arkansas; 14 parishes in Louisiana. It was in force for 94 min.
The area
The outline as issued.
The facts
- Issued
- Nov 1, 2004, 1:11 PM CST (19:11 UTC)
- Expired
- Nov 1, 2004, 2:45 PM CST
- In force
- 94 min
- Issued by
- the Storm Prediction Center
All 28 counties
Arkansas County, AR, Ashley County, AR, Bradley County, AR, Chicot County, AR, Cleveland County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lincoln County, AR, Monroe County, AR, Prairie County, AR, St. Francis County, AR, Woodruff County, AR, Caldwell Parish, LA, Catahoula Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Richland Parish, LA, Union Parish, LA, West Carroll Parish, LA, Winn Parish, LA
The radar
The Shreveport radar (KSHV), 150 km from the middle of the area, began a volume at 19:13 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
Shreveport, LA (KSHV), launched 12:00Z, 7.2 hours before the alert went out and 142 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.
- Mixed-layer CAPE
- 373 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 680 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 246 m²/s²
- 0-3 km storm-relative helicity
- 320 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 2.3
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 1, 9:17 AM CST | Mesoscale Discussion | SPC | Bradley, Calhoun, Cleburne, Cleveland, Columbia, Dallas and 18 more | 118 min |
| Nov 1, 10:00 AM CST | Tornado Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Cleveland, Cross and 16 more | 6 hr |
| Nov 1, 2:35 PM CST | Tornado Watch | SPC | Crittenden, Cross, Desha, Lee, Mississippi, Phillips and 2 more | 5 hr |
| Nov 1, 5:57 PM CST | Mesoscale Discussion | SPC | Crittenden, Cross, Desha, Lee, Mississippi, Phillips and 2 more | 2 hr |
Nearby
Mesoscale 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.