Alert archive / Florida / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 265
The Storm Prediction Center issued this severe thunderstorm watch at May 24, 2017, 2:49 PM EDT for 29 counties in Florida. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 24, 2017, 2:49 PM EDT (18:49 UTC)
- Expired
- May 24, 2017, 9:29 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 29 counties
Brevard County, FL, Broward County, FL, Charlotte County, FL, Clay County, FL, Collier County, FL, DeSoto County, FL, Flagler County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Marion County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Orange County, FL, Osceola County, FL, Palm Beach County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Saint Lucie County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Melbourne radar (KMLB), 113 km from the middle of the area, began a volume at 18:51 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
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 3:28 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola, Seminole | 32 min |
| May 24, 3:48 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange, Osceola, Seminole, Volusia | 42 min |
| May 24, 4:21 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Seminole, Volusia | 24 min |
| May 24, 4:55 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Orange, Osceola | 48 min |
| May 24, 6:24 PM EDT | Severe Thunderstorm Warning | MFL | Collier | 36 min |
| May 24, 7:52 PM EDT | Severe Thunderstorm Warning | MFL | Broward, Miami-Dade | 23 min |
| May 24, 8:18 PM EDT | Severe Thunderstorm Warning | MFL | Broward, Palm Beach | 14 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
Cape Canaveral, FL (KXMR), launched 12:00Z, 6.8 hours before the alert went out and 118 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
- 608 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1065 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 199 m²/s²
- 0-3 km storm-relative helicity
- 175 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 8.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 24, 3:45 AM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Clay, Duval, Gilchrist, Levy and 3 more | 2 hr |
| May 24, 6:30 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 33 more | 2 hr |
| May 24, 6:56 AM EDT | Tornado Watch | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Citrus and 30 more | 8 hr |
| May 24, 10:26 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Citrus and 32 more | 94 min |
| May 24, 11:03 AM EDT | Tornado Watch | SPC | Baker, Columbia, Duval, Hamilton, Nassau, Suwannee | 10 hr |
| May 24, 12:54 PM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Brevard, Broward, Charlotte, Citrus and 30 more | 2 hr |
| May 24, 2:10 PM EDT | Mesoscale Discussion | SPC | Baker, Columbia, Duval, Hamilton, Madison, Nassau and 1 more | 95 min |
| May 24, 5:25 PM EDT | Mesoscale Discussion | SPC | Baker, Columbia, Duval, Hamilton, Madison, Nassau and 2 more | 65 min |
Nearby
Severe Thunderstorm Watches in Florida, 2017Every severe thunderstorm watch 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.