Alert archive / Florida / Mesoscale Discussions in 2004
Mesoscale Discussion 2261
The Storm Prediction Center issued this mesoscale discussion at Sep 26, 2004, 8:21 AM EDT for 24 counties in Florida; 4 counties in Georgia. It was in force for 114 min.
The area
The outline as issued.
The facts
- Issued
- Sep 26, 2004, 8:21 AM EDT (12:21 UTC)
- Expired
- Sep 26, 2004, 10:15 AM EDT
- In force
- 114 min
- Issued by
- the Storm Prediction Center
All 28 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Duval County, FL, Flagler County, FL, Hernando County, FL, Hillsborough County, FL, Lake County, FL, Marion County, FL, Nassau County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Union County, FL, Volusia County, FL, Camden County, GA, Charlton County, GA, Clinch County, GA, Ware County, GA
The radar
The Jacksonville radar (KJAX), 154 km from the middle of the area, began a volume at 12:22 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
Jacksonville, FL (KJAX), launched 12:00Z, 0.4 hours before the alert went out and 155 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
- 1022 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 577 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 245 m²/s²
- 0-3 km storm-relative helicity
- 287 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.4
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 |
|---|---|---|---|---|
| Sep 25, 8:48 PM EDT | Mesoscale Discussion | SPC | Brevard, Flagler, Glades, Hendry, Highlands, Indian River and 10 more | 117 min |
| Sep 25, 11:10 PM EDT | Tornado Watch | SPC | Brevard, Flagler, Glades, Hardee, Hendry, Highlands and 14 more | 7 hr |
| Sep 26, 2:37 AM EDT | Mesoscale Discussion | SPC | Brevard, Flagler, Highlands, Indian River, Lake, Marion and 6 more | 113 min |
| Sep 26, 4:50 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 22 more | 12 hr |
| Sep 26, 11:13 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 22 more | 2 hr |
| Sep 26, 3:11 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 22 more | 2 hr |
| Sep 26, 4:25 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 8 more | 9 hr |
| Sep 26, 7:16 PM EDT | Mesoscale Discussion | SPC | Baker, Duval, Nassau | 119 min |
Nearby
Mesoscale Discussions in Florida, 2004Mesoscale Discussions in Georgia, 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.