Alert archive / Florida / Tornado Watches in 2016
Tornado Watch 4
The Storm Prediction Center issued this tornado watch at Jan 17, 2016, 12:47 AM EST for 31 counties in Florida. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 17, 2016, 12:47 AM EST (05:47 UTC)
- Expired
- Jan 17, 2016, 8:48 AM EST
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 60 kt
All 31 counties
Brevard County, FL, Broward County, FL, Charlotte County, FL, Citrus County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Lee County, FL, Manatee 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, Pasco County, FL, Pinellas County, FL, Polk County, FL, Saint Lucie County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 83 km from the middle of the area, began a volume at 05:47 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
- 50%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 50%
- 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
- 70%
Warnings issued inside it
26 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 17, 2:52 AM EST | Severe Thunderstorm Warning | TBW | Manatee, Sarasota | 38 min |
| Jan 17, 2:56 AM EST | Tornado Warning | TBW | Manatee, Sarasota | 34 min |
| Jan 17, 3:14 AM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Pasco, Polk, Sumter | 31 min |
| Jan 17, 3:27 AM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee | 33 min |
| Jan 17, 3:28 AM EST | Tornado Warning | TBW | Manatee | 32 min |
| Jan 17, 3:33 AM EST | Severe Thunderstorm Warning | TBW | Manatee, Sarasota | 27 min |
| Jan 17, 3:38 AM EST | Tornado Warning | TBW | Sarasota | 20 min |
| Jan 17, 3:45 AM EST | Tornado Warning | TBW | Hardee, Hillsborough, Manatee, Polk | 12 min |
| Jan 17, 3:49 AM EST | Tornado Warning | TBW | Charlotte, Sarasota | 26 min |
| Jan 17, 3:56 AM EST | Tornado Warning | TBW | Manatee | 14 min |
| Jan 17, 4:15 AM EST | Severe Thunderstorm Warning | TBW | Charlotte, Lee | 45 min |
| Jan 17, 4:15 AM EST | Tornado Warning | TBW | DeSoto, Hardee, Manatee, Polk, Sarasota | 30 min |
| Jan 17, 4:30 AM EST | Severe Thunderstorm Warning | MLB | Brevard | 22 min |
| Jan 17, 4:36 AM EST | Severe Thunderstorm Warning | TBW | DeSoto, Hardee, Highlands, Sarasota | 39 min |
| Jan 17, 4:44 AM EST | Tornado Warning | TBW | Charlotte, DeSoto, Sarasota | 31 min |
| Jan 17, 4:50 AM EST | Severe Thunderstorm Warning | TBW | Hardee, Highlands, Polk | 55 min |
| Jan 17, 4:58 AM EST | Severe Thunderstorm Warning | TBW | Charlotte, Lee | 32 min |
| Jan 17, 5:05 AM EST | Severe Thunderstorm Warning | MLB | Brevard, Indian River, Okeechobee, Osceola | 55 min |
| Jan 17, 5:07 AM EST | Tornado Warning | TBW | Charlotte | 23 min |
| Jan 17, 5:13 AM EST | Severe Thunderstorm Warning | TBW | DeSoto, Hardee, Highlands | 47 min |
| Jan 17, 5:17 AM EST | Tornado Warning | MFL | Collier | 28 min |
| Jan 17, 5:40 AM EST | Severe Thunderstorm Warning | MLB | Brevard, Orange, Osceola | 50 min |
| Jan 17, 6:12 AM EST | Severe Thunderstorm Warning | KEY | Monroe | 63 min |
| Jan 17, 6:12 AM EST | Tornado Warning | MFL | Glades, Hendry, Palm Beach | 33 min |
| Jan 17, 7:03 AM EST | Tornado Warning | MLB | Martin | 14 min |
| Jan 17, 7:11 AM EST | Severe Thunderstorm Warning | MFL | Palm Beach | 34 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, 5.8 hours before the alert went out and 83 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
- 1 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1407 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
476 WWUS20 KWNS 170543 SEL4 SPC WW 170543 FLZ000-CWZ000-171300- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 4 NWS STORM PREDICTION CENTER NORMAN OK 1245 AM EST SUN JAN 17 2016 THE NWS STORM PREDICTION CENTER HAS ISSUED A * TORNADO WATCH FOR PORTIONS OF CENTRAL AND SOUTH FLORIDA INCLUDING THE KEYS COASTAL WATERS * EFFECTIVE THIS SUNDAY MORNING FROM 1245 AM UNTIL 800 AM EST. * PRIMARY THREATS INCLUDE... A FEW TORNADOES POSSIBLE SCATTERED DAMAGING WIND GUSTS TO 70 MPH POSSIBLE SUMMARY...A BAND OF INTENSE THUNDERSTORMS OVER THE GULF OF MEXICO WILL SPREAD ACROSS THE FL PENINSULA OVERNIGHT...WHILE ISOLATED STRONG STORMS DEVELOP OUT AHEAD. STRONG WIND FIELDS WILL PROMOTE THE RISK OF SEVERE WEATHER INCLUDING DAMAGING WINDS AND ISOLATED TORNADOES. THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE MILES EAST AND WEST OF A LINE FROM 50 MILES NORTHWEST OF ORLANDO FLORIDA TO 25 MILES SOUTH SOUTHEAST OF MARATHON FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. && AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 24035. ...HART
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 16, 11:03 PM EST | Mesoscale Discussion | SPC | Charlotte, Collier, DeSoto, Glades, Hardee, Hendry and 7 more | 117 min |
| Jan 17, 2:31 AM EST | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 24 more | 89 min |
| Jan 17, 5:08 AM EST | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Collier, DeSoto, Glades and 15 more | 2 hr |
| Jan 17, 6:38 AM EST | Mesoscale Discussion | SPC | Broward, Miami-Dade, Monroe, Palm Beach | 97 min |
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.