Alert archive / Florida / Mesoscale Discussions in 2007
Mesoscale Discussion 257
The Storm Prediction Center issued this mesoscale discussion at Mar 2, 2007, 6:21 AM EST for 19 counties in Florida; 4 counties in Georgia; Beaufort County, Berkeley County, Charleston County, South Carolina. It was in force for 84 min.
The area
The outline as issued.
The facts
- Issued
- Mar 2, 2007, 6:21 AM EST (11:21 UTC)
- Expired
- Mar 2, 2007, 7:45 AM EST
- In force
- 84 min
- Issued by
- the Storm Prediction Center
All 26 counties
Alachua County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hernando County, FL, Lake County, FL, Levy County, FL, Marion County, FL, Nassau County, FL, Orange County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Union County, FL, Volusia County, FL, Camden County, GA, Chatham County, GA, Glynn County, GA, McIntosh County, GA, Beaufort County, SC, Berkeley County, SC, Charleston County, SC
The radar
The Jacksonville radar (KJAX), 61 km from the middle of the area, began a volume at 11:24 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 00:00Z, 11.4 hours before the alert went out and 60 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
- 1205 J/kg
- Mixed-layer CIN
- -22 J/kg
- Mixed-layer LCL
- 693 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 330 m²/s²
- 0-3 km storm-relative helicity
- 429 m²/s²
- Significant tornado parameter
- 3.0
- Supercell composite
- 12.6
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 |
|---|---|---|---|---|
| Mar 1, 8:39 PM EST | Tornado Watch | SPC | Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 12 more | 8 hr |
| Mar 1, 10:11 PM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 18 more | 94 min |
| Mar 2, 12:54 AM EST | Tornado Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 10 more | 7 hr |
| Mar 2, 2:33 AM EST | Mesoscale Discussion | SPC | Franklin, Jefferson, Leon, Madison, Taylor, Wakulla | 87 min |
| Mar 2, 4:13 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 10 more | 62 min |
| Mar 2, 10:54 AM EST | Mesoscale Discussion | SPC | Flagler, Hernando, Hillsborough, Lake, Orange, Pasco and 3 more | 2 hr |
| Mar 1, 8:27 PM EST | Tornado Watch | SPC | Burke, Columbia, Elbert, Franklin, Habersham, Hart and 5 more | 9 hr |
| Mar 2, 3:00 AM EST | Mesoscale Discussion | SPC | Richmond | 90 min |
| Mar 1, 7:59 PM EST | Mesoscale Discussion | SPC | Aiken, Bamberg, Calhoun, Cherokee, Chester, Chesterfield and 18 more | 91 min |
| Mar 1, 11:44 PM EST | Mesoscale Discussion | SPC | Dillon, Florence, Horry, Marion, Marlboro | 91 min |
| Mar 2, 12:28 AM EST | Tornado Watch | SPC | Darlington, Dillon, Florence, Georgetown, Horry, Marion and 2 more | 8 hr |
Nearby
Mesoscale Discussions in Florida, 2007Mesoscale Discussions in Georgia, 2007Mesoscale Discussions in South Carolina, 2007Every mesoscale discussion in 2007
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.