Alert archive / Florida / Severe Thunderstorm Watches in 2008
Severe Thunderstorm Watch 56
The Storm Prediction Center issued this severe thunderstorm watch at Feb 13, 2008, 11:44 AM EST for 5 counties in Florida. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 13, 2008, 11:44 AM EST (16:44 UTC)
- Expired
- Feb 13, 2008, 3:21 PM EST
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Broward County, FL, Collier County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 50 km from the middle of the area, began a volume at 16:35 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 13, 12:28 PM EST | Severe Thunderstorm Warning | KEY | Monroe | 32 min |
| Feb 13, 1:49 PM EST | Severe Thunderstorm Warning | MFL | Miami-Dade | 42 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Key West, FL (KEYW), launched 12:00Z, 4.7 hours before the alert went out and 134 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
- 1835 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 708 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 7:41 PM EST | Mesoscale Discussion | SPC | Alachua, Bradford, Brevard, Broward, Charlotte, Citrus and 34 more | 2 hr |
| Feb 12, 8:11 PM EST | Mesoscale Discussion | SPC | Calhoun, Gadsden, Holmes, Jackson, Jefferson, Leon and 6 more | 64 min |
| Feb 12, 8:30 PM EST | Tornado Watch | SPC | Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 11 more | 4 hr |
| Feb 12, 9:39 PM EST | Mesoscale Discussion | SPC | Alachua, Broward, Charlotte, Citrus, Collier, DeSoto and 25 more | 96 min |
| Feb 12, 10:20 PM EST | Tornado Watch | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 30 more | 9 hr |
| Feb 12, 11:25 PM EST | Mesoscale Discussion | SPC | Gadsden, Jefferson, Leon, Madison, Taylor, Wakulla | 95 min |
| Feb 13, 3:12 AM EST | Mesoscale Discussion | SPC | Alachua, Brevard, Broward, Charlotte, Citrus, Collier and 30 more | 93 min |
| Feb 13, 8:19 AM EST | Mesoscale Discussion | SPC | Broward, Charlotte, Collier, Glades, Hendry, Lee and 4 more | 56 min |
| Feb 13, 10:52 AM EST | Mesoscale Discussion | SPC | Broward, Collier, Glades, Hendry, Martin, Miami-Dade and 4 more | 53 min |
Nearby
Severe Thunderstorm Watches in Florida, 2008Every severe thunderstorm watch in 2008
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.