Alert archive / Florida / Tornado Watches in 2020
Tornado Watch 144
The Storm Prediction Center issued this tornado watch at Apr 24, 2020, 1:57 AM EDT for 23 counties in Florida. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2020, 1:57 AM EDT (05:57 UTC)
- Expired
- Apr 24, 2020, 11:00 AM EDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 23 counties
Alachua County, FL, Brevard County, FL, Citrus County, FL, Dixie County, FL, Flagler County, FL, Gilchrist County, FL, Hardee County, FL, Hernando County, FL, Hillsborough County, FL, Lake County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 135 km from the middle of the area, began a volume at 06:00 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
- 30%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 5%
- One or more hailstones of 2 inches or more
- 5%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 2:36 AM EDT | Severe Thunderstorm Warning | JAX | Gilchrist | 24 min |
| Apr 24, 3:13 AM EDT | Severe Thunderstorm Warning | JAX | Alachua, Bradford | 17 min |
| Apr 24, 4:15 AM EDT | Severe Thunderstorm Warning | JAX | Putnam, Saint Johns | 45 min |
| Apr 24, 4:29 AM EDT | Severe Thunderstorm Warning | JAX | Flagler, Marion, Putnam, Saint Johns | 46 min |
| Apr 24, 4:59 AM EDT | Severe Thunderstorm Warning | TBW | Citrus, Hernando, Hillsborough, Pasco, Pinellas, Sumter | 46 min |
| Apr 24, 5:05 AM EDT | Tornado Warning | TBW | Hillsborough, Pasco, Pinellas | 25 min |
| Apr 24, 5:12 AM EDT | Severe Thunderstorm Warning | JAX | Marion | 48 min |
| Apr 24, 5:19 AM EDT | Severe Thunderstorm Warning | JAX | Flagler | 41 min |
| Apr 24, 5:33 AM EDT | Tornado Warning | JAX | Marion | 12 min |
| Apr 24, 5:35 AM EDT | Severe Thunderstorm Warning | MLB | Lake, Volusia | 55 min |
| Apr 24, 5:41 AM EDT | Severe Thunderstorm Warning | TBW | Hillsborough, Pasco, Pinellas, Sumter | 49 min |
| Apr 24, 5:47 AM EDT | Tornado Warning | TBW | Hillsborough, Pinellas | 18 min |
| Apr 24, 7:07 AM EDT | Severe Thunderstorm Warning | MLB | Brevard, Orange, Osceola | 38 min |
| Apr 24, 7:29 AM EDT | Severe Thunderstorm Warning | MLB | Brevard | 31 min |
| Apr 24, 7:41 AM EDT | Severe Thunderstorm Warning | MLB | Brevard, Osceola | 49 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
Tampa Bay, FL (KTBW), launched 00:00Z, 6.0 hours before the alert went out and 135 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
- 595 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 1456 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 208 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 7.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 9:08 PM EDT | Mesoscale Discussion | SPC | Alachua, Bradford, Clay, Gilchrist, Putnam | 67 min |
| Apr 24, 12:27 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Columbia, Dixie, Gilchrist and 7 more | 93 min |
| Apr 24, 3:59 AM EDT | Mesoscale Discussion | SPC | Brevard, Citrus, Flagler, Hardee, Hernando, Hillsborough and 13 more | 2 hr |
| Apr 24, 8:14 AM EDT | Mesoscale Discussion | SPC | Brevard, Charlotte, DeSoto, Hardee, Highlands, Indian River and 3 more | 2 hr |
Nearby
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.