Alert archive / Florida / Mesoscale Discussions in 2017
Mesoscale Discussion 1638
The Storm Prediction Center issued this mesoscale discussion at Sep 10, 2017, 3:01 PM EDT for 40 counties in Florida; 4 counties in Georgia. It was in force for 119 min.
The area
The outline as issued.
The facts
- Issued
- Sep 10, 2017, 3:01 PM EDT (19:01 UTC)
- Expired
- Sep 10, 2017, 5:00 PM EDT
- In force
- 119 min
- Issued by
- the Storm Prediction Center
All 44 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Brevard County, FL, Charlotte County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, DeSoto County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Glades County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Martin County, FL, Nassau County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Saint Lucie County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Union County, FL, Volusia County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Glynn County, GA
The radar
The Melbourne radar (KMLB), 80 km from the middle of the area, began a volume at 19:03 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, 7.0 hours before the alert went out and 103 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
- 103 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 872 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Sep 9, 10:26 PM EDT | Mesoscale Discussion | SPC | Broward, Collier, Glades, Hendry, Highlands, Indian River and 7 more | 94 min |
| Sep 9, 11:45 PM EDT | Tornado Watch | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 13 more | 12 hr |
| Sep 10, 2:23 AM EDT | Mesoscale Discussion | SPC | Broward, Collier, Glades, Hendry, Highlands, Indian River and 7 more | 2 hr |
| Sep 10, 6:05 AM EDT | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 13 more | 115 min |
| Sep 10, 8:32 AM EDT | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, DeSoto, Glades, Hendry and 9 more | 118 min |
| Sep 10, 12:02 PM EDT | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 36 more | 13 hr |
Nearby
Mesoscale Discussions in Florida, 2017Mesoscale Discussions in Georgia, 2017Every mesoscale discussion in 2017
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.