Alert archive / Florida / Mesoscale Discussions in 2018
Mesoscale Discussion 162
The Storm Prediction Center issued this mesoscale discussion at Mar 20, 2018, 4:16 PM EDT for 34 counties in Florida; Camden County, Charlton County, Echols County, Georgia. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Mar 20, 2018, 4:16 PM EDT (20:16 UTC)
- Expired
- Mar 20, 2018, 5:45 PM EDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 37 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Hardee County, FL, Hernando County, FL, Hillsborough County, FL, Lafayette County, FL, Lake County, FL, Levy County, FL, Madison County, FL, Manatee County, FL, Marion County, FL, Nassau County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Camden County, GA, Charlton County, GA, Echols County, GA
The radar
The Tampa radar (KTBW), 115 km from the middle of the area, began a volume at 20:18 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
Tampa Bay, FL (KTBW), launched 12:00Z, 8.3 hours before the alert went out and 115 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
- 1099 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 656 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 177 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 7.3
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 9:50 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 21 more | 55 min |
| Mar 20, 10:24 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 34 more | 9 hr |
| Mar 20, 12:05 PM EDT | Mesoscale Discussion | SPC | Nassau | 55 min |
| Mar 20, 1:00 PM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Citrus, Clay, Columbia and 28 more | 60 min |
| Mar 19, 8:45 PM EDT | Mesoscale Discussion | SPC | Baldwin, Bartow, Bibb, Butts, Carroll, Chattooga and 40 more | 60 min |
| Mar 19, 9:08 PM EDT | Tornado Watch | SPC | Baldwin, Barrow, Bartow, Bibb, Butts, Carroll and 48 more | 7 hr |
| Mar 19, 9:51 PM EDT | Mesoscale Discussion | SPC | Carroll, Douglas, Haralson, Paulding, Polk | 84 min |
| Mar 20, 12:32 AM EDT | Mesoscale Discussion | SPC | Bulloch, Burke, Candler, Columbia, Effingham, Jenkins and 2 more | 88 min |
| Mar 20, 1:51 AM EDT | Severe Thunderstorm Watch | SPC | Bryan, Bulloch, Burke, Candler, Chatham, Columbia and 16 more | 4 hr |
| Mar 20, 2:36 AM EDT | Mesoscale Discussion | SPC | Baldwin, Bibb, Crawford, Glascock, Harris, Jefferson and 12 more | 84 min |
| Mar 20, 4:54 AM EDT | Mesoscale Discussion | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Emanuel and 12 more | 96 min |
| Mar 20, 12:43 PM EDT | Tornado Watch | SPC | Appling, Bacon, Brantley, Bryan, Bulloch, Charlton and 13 more | 7 hr |
| Mar 20, 2:48 PM EDT | Mesoscale Discussion | SPC | Brantley, Bryan, Camden, Charlton, Chatham, Clinch and 9 more | 87 min |
| Mar 20, 6:10 PM EDT | Mesoscale Discussion | SPC | Chatham, Glynn, McIntosh | 65 min |
Nearby
Mesoscale Discussions in Florida, 2018Mesoscale Discussions in Georgia, 2018Every mesoscale discussion in 2018
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.