Alert archive / Florida / Mesoscale Discussions in 2014
Mesoscale Discussion 141
The Storm Prediction Center issued this mesoscale discussion at Feb 21, 2014, 10:13 AM EST for 23 counties in Florida; 5 counties in Georgia. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- Feb 21, 2014, 10:13 AM EST (15:13 UTC)
- Expired
- Feb 21, 2014, 11:45 AM EST
- In force
- 92 min
- Issued by
- the Storm Prediction Center
All 28 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette 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, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Glynn County, GA, Ware County, GA
The radar
The Jacksonville radar (KJAX), 97 km from the middle of the area, began a volume at 15:15 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, 3.2 hours before the alert went out and 99 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
- 968 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 609 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 137 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 4.3
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 |
|---|---|---|---|---|
| Feb 21, 12:43 AM EST | Mesoscale Discussion | SPC | Escambia, Okaloosa, Santa Rosa | 62 min |
| Feb 21, 1:58 AM EST | Severe Thunderstorm Watch | SPC | Bay, Calhoun, Escambia, Franklin, Gulf, Holmes and 6 more | 7 hr |
| Feb 21, 4:33 AM EST | Mesoscale Discussion | SPC | Holmes, Jackson, Okaloosa, Santa Rosa, Walton | 87 min |
| Feb 21, 6:39 AM EST | Severe Thunderstorm Watch | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 17 more | 9 hr |
| Feb 21, 8:17 AM EST | Mesoscale Discussion | SPC | Baker, Columbia, Hamilton, Jefferson, Madison, Suwannee | 118 min |
| Feb 21, 12:43 PM EST | Mesoscale Discussion | SPC | Baker, Columbia, Hamilton, Jefferson, Lafayette, Leon and 5 more | 62 min |
| Feb 20, 10:29 PM EST | Mesoscale Discussion | SPC | Bartow, Catoosa, Chattooga, Dade, Dawson, Fannin and 10 more | 61 min |
| Feb 20, 10:47 PM EST | Tornado Watch | SPC | Bartow, Catoosa, Chattooga, Cherokee, Dade, Dawson and 16 more | 6 hr |
Nearby
Mesoscale Discussions in Florida, 2014Mesoscale Discussions in Georgia, 2014Every mesoscale discussion in 2014
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.