Alert archive / Florida / Tornado Watches in 2017
Tornado Watch 23
The Storm Prediction Center issued this tornado watch at Jan 22, 2017, 4:35 PM EST for 18 counties in Florida. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 22, 2017, 4:35 PM EST (21:35 UTC)
- Expired
- Jan 22, 2017, 10:00 PM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Particularly dangerous situation
- Yes
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Brevard County, FL, Citrus County, FL, DeSoto County, FL, Hardee County, FL, Hernando County, FL, Highlands County, FL, Hillsborough County, FL, Lake County, FL, Manatee County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 96 km from the middle of the area, began a volume at 21:36 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
- 80%
- One or more EF2 to EF5 tornadoes
- 80%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
31 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 22, 5:41 PM EST | Severe Thunderstorm Warning | TBW | Pasco | 34 min |
| Jan 22, 5:42 PM EST | Tornado Warning | TBW | Hernando, Pasco | 33 min |
| Jan 22, 5:50 PM EST | Tornado Warning | TBW | Citrus, Sumter | 25 min |
| Jan 22, 5:54 PM EST | Severe Thunderstorm Warning | MLB | Lake, Orange | 66 min |
| Jan 22, 5:59 PM EST | Severe Thunderstorm Warning | TBW | Citrus, Hernando, Sumter | 46 min |
| Jan 22, 5:59 PM EST | Tornado Warning | TBW | Sumter | 31 min |
| Jan 22, 6:03 PM EST | Tornado Warning | MLB | Lake, Orange | 42 min |
| Jan 22, 6:12 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee, Sarasota | 32 min |
| Jan 22, 6:20 PM EST | Tornado Warning | TBW | Hernando, Sumter | 25 min |
| Jan 22, 6:39 PM EST | Severe Thunderstorm Warning | MLB | Lake, Orange, Seminole, Volusia | 66 min |
| Jan 22, 6:41 PM EST | Tornado Warning | MLB | Lake | 34 min |
| Jan 22, 6:42 PM EST | Severe Thunderstorm Warning | TBW | Citrus, Hernando, Pasco, Sumter | 63 min |
| Jan 22, 6:44 PM EST | Tornado Warning | MLB | Lake, Volusia | 46 min |
| Jan 22, 6:55 PM EST | Tornado Warning | MLB | Volusia | 20 min |
| Jan 22, 7:00 PM EST | Severe Thunderstorm Warning | MLB | Lake, Orange, Osceola, Seminole | 60 min |
| Jan 22, 7:19 PM EST | Tornado Warning | MLB | Orange, Seminole, Volusia | 41 min |
| Jan 22, 7:21 PM EST | Severe Thunderstorm Warning | TBW | Polk | 39 min |
| Jan 22, 7:23 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Pinellas | 22 min |
| Jan 22, 7:26 PM EST | Severe Thunderstorm Warning | MLB | Lake, Orange, Volusia | 64 min |
| Jan 22, 7:29 PM EST | Tornado Warning | MLB | Volusia | 31 min |
| Jan 22, 7:38 PM EST | Tornado Warning | TBW | Manatee, Sarasota | 22 min |
| Jan 22, 7:51 PM EST | Tornado Warning | MLB | Brevard, Orange, Seminole, Volusia | 39 min |
| Jan 22, 7:53 PM EST | Severe Thunderstorm Warning | MLB | Lake, Orange, Seminole, Volusia | 37 min |
| Jan 22, 7:54 PM EST | Severe Thunderstorm Warning | TBW | Pinellas | 36 min |
| Jan 22, 7:59 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee | 31 min |
| Jan 22, 8:03 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Pasco, Polk, Sumter | 42 min |
| Jan 22, 8:24 PM EST | Severe Thunderstorm Warning | TBW | Manatee | 22 min |
| Jan 22, 8:29 PM EST | Severe Thunderstorm Warning | MLB | Brevard, Orange, Seminole, Volusia | 61 min |
| Jan 22, 9:10 PM EST | Severe Thunderstorm Warning | MLB | Brevard, Osceola | 50 min |
| Jan 22, 9:28 PM EST | Tornado Warning | MLB | Brevard | 32 min |
| Jan 22, 9:58 PM EST | Severe Thunderstorm Warning | MLB | Brevard, Osceola | 47 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 12:00Z, 9.6 hours before the alert went out and 96 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
- 906 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 258 m²/s²
- 0-3 km storm-relative helicity
- 283 m²/s²
- Significant tornado parameter
- 1.2
- Supercell composite
- 5.7
The text
As transmitted.
726 WWUS20 KWNS 222133 SEL3 SPC WW 222133 FLZ000-CWZ000-230300- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 23 NWS Storm Prediction Center Norman OK 435 PM EST Sun Jan 22 2017 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Central Florida Coastal Waters * Effective this Sunday afternoon and evening from 435 PM until 1000 PM EST. ...THIS IS A PARTICULARLY DANGEROUS SITUATION... * Primary threats include... Several tornadoes and a few intense tornadoes likely Widespread damaging wind gusts to 70 mph likely Scattered large hail events to 1.5 inches in diameter possible SUMMARY...A line of supercell thunderstorms over the Gulf Of Mexico will track eastward across central FL late this afternoon and evening, posing a risk of tornadoes and damaging wind gusts. Strong tornadoes are possible. The tornado watch area is approximately along and 55 statute miles east and west of a line from 35 miles northeast of Ocala FL to 35 miles southeast of Sarasota FL. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU3). 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. && OTHER WATCH INFORMATION...CONTINUE...WW 21...WW 22... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 25040. ...Hart
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 21, 7:51 PM EST | Tornado Watch | SPC | Escambia, Holmes, Jackson, Okaloosa, Santa Rosa, Walton and 1 more | 8 hr |
| Jan 21, 9:30 PM EST | Mesoscale Discussion | SPC | Holmes, Jackson, Santa Rosa | 90 min |
| Jan 21, 10:57 PM EST | Mesoscale Discussion | SPC | Holmes, Jackson, Washington | 93 min |
| Jan 22, 12:49 AM EST | Mesoscale Discussion | SPC | Holmes, Jackson, Santa Rosa | 116 min |
| Jan 22, 2:55 AM EST | Mesoscale Discussion | SPC | Calhoun, Gadsden, Hamilton, Jackson, Jefferson, Leon and 1 more | 65 min |
| Jan 22, 3:20 AM EST | Tornado Watch | SPC | Baker, Columbia, Gadsden, Hamilton, Jackson, Jefferson and 4 more | 9 hr |
| Jan 22, 6:34 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Clay and 24 more | 86 min |
| Jan 22, 7:11 AM EST | Mesoscale Discussion | SPC | Baker, Calhoun, Gadsden, Hamilton, Jackson, Jefferson and 4 more | 2 hr |
| Jan 22, 8:43 AM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Escambia, Holmes, Jackson, Okaloosa and 3 more | 2 hr |
| Jan 22, 9:06 AM EST | Tornado Watch | SPC | Bay, Calhoun, Escambia, Franklin, Gulf, Holmes and 6 more | 5 hr |
| Jan 22, 9:11 AM EST | Mesoscale Discussion | SPC | Baker, Columbia, Duval, Gadsden, Hamilton, Jefferson and 4 more | 64 min |
| Jan 22, 10:16 AM EST | Mesoscale Discussion | SPC | Calhoun, Escambia, Gadsden, Holmes, Jackson, Jefferson and 7 more | 59 min |
| Jan 22, 11:25 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Clay and 20 more | 95 min |
| Jan 22, 12:02 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Holmes and 4 more | 58 min |
| Jan 22, 12:47 PM EST | Tornado Watch | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Clay and 27 more | 7 hr |
| Jan 22, 1:36 PM EST | Mesoscale Discussion | SPC | Bay, Calhoun, Franklin, Gadsden, Gulf, Jackson and 5 more | 54 min |
| Jan 22, 1:56 PM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Duval and 7 more | 94 min |
| Jan 22, 3:02 PM EST | Mesoscale Discussion | SPC | Gadsden, Jefferson, Lafayette, Leon, Madison, Taylor and 1 more | 58 min |
| Jan 22, 4:12 PM EST | Mesoscale Discussion | SPC | DeSoto, Hardee, Highlands, Hillsborough, Lake, Manatee and 6 more | 63 min |
| Jan 22, 4:19 PM EST | Mesoscale Discussion | SPC | Alachua, Baker, Columbia, Dixie, Gilchrist, Hamilton and 5 more | 86 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.