Alert archive / Florida / Tornado Warnings in 2018
Tornado Warning 10, NWS Miami, FL
NWS Miami, FL issued this tornado warning at Dec 20, 2018, 2:46 PM EST for Collier County, Florida. It was in force for 29 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Dec 20, 2018, 2:46 PM EST (19:46 UTC)
- Expired
- Dec 20, 2018, 3:15 PM EST
- In force
- 29 min
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
County Collier County, FL
The radar
The Miami radar (KAMX), 112 km from the middle of the area, began a volume at 19:49 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Dec 20, 2:15 PM EST | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 7.8 hours before the alert went out and 120 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
- 343 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 787 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 262 m²/s²
- 0-3 km storm-relative helicity
- 271 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 4.1
The text
As transmitted.
668
WFUS52 KMFL 201946
TORMFL
FLC021-202015-
/O.NEW.KMFL.TO.W.0010.181220T1946Z-181220T2015Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Miami FL
246 PM EST THU DEC 20 2018
The National Weather Service in Miami has issued a
* Tornado Warning for...
South central Collier County in southwestern Florida...
* Until 315 PM EST.
* At 245 PM EST, a severe thunderstorm capable of producing a large
waterspout and capable of producing a tornado was located 7 miles
southeast of Royal Palm Hammock, or 8 miles west of Everglades
City, moving northeast at 45 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Expect damage to mobile homes, roofs, and vehicles. Tree
damage is likely.
* Locations impacted include...
Port Of The Island and Cape Romano Aquatic Preserve.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.
&&
LAT...LON 2587 8145 2586 8151 2591 8158 2599 8150
2593 8140
TIME...MOT...LOC 1945Z 235DEG 40KT 2591 8151
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
ARThe office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 20, 4:09 AM EST | Gale Warning | MFL | 48 hr | |
| Dec 20, 4:40 AM EST | Coastal Flood Statement | MFL | Collier | 7 hr |
| Dec 20, 4:40 AM EST | Rip Current Statement | MFL | Broward, Collier, Miami-Dade, Palm Beach | 59 hr |
| Dec 20, 4:40 AM EST | High Surf Advisory | MFL | Collier | 59 hr |
| Dec 20, 6:48 AM EST | Special Weather Statement | MFL | Broward | 27 min |
| Dec 20, 7:13 AM EST | Special Weather Statement | MFL | Broward | 32 min |
| Dec 20, 7:42 AM EST | Special Weather Statement | MFL | Palm Beach | 33 min |
| Dec 20, 8:03 AM EST | Special Marine Warning | MFL | 27 min | |
| Dec 20, 8:24 AM EST | Special Marine Warning | MFL | 37 min | |
| Dec 20, 11:35 AM EST | Coastal Flood Statement | MFL | Monroe | 40 hr |
| Dec 20, 11:35 AM EST | Coastal Flood Advisory | MFL | Collier | 40 hr |
| Dec 20, 12:33 PM EST | Special Marine Warning | MFL | 57 min | |
| Dec 20, 1:23 PM EST | Special Weather Statement | MFL | Collier, Glades, Hendry | 52 min |
| Dec 20, 1:35 PM EST | Tornado Warning | MFL | Glades, Hendry | 25 min |
| Dec 20, 1:45 PM EST | Severe Thunderstorm Warning | MFL | Collier | 45 min |
| Dec 20, 1:51 PM EST | Special Marine Warning | MFL | 54 min | |
| Dec 20, 1:58 PM EST | Special Marine Warning | MFL | 62 min | |
| Dec 20, 2:21 PM EST | Special Weather Statement | MFL | Collier, Glades, Hendry | 54 min |
| Dec 20, 2:44 PM EST | Special Weather Statement | MFL | Palm Beach | 46 min |
| Dec 20, 2:53 PM EST | Special Marine Warning | MFL | 67 min | |
| Dec 20, 3:13 PM EST | Special Weather Statement | MFL | Collier, Hendry | 62 min |
| Dec 20, 3:52 PM EST | Wind Advisory | MFL | Broward, Collier, Glades, Hendry, Miami-Dade, Monroe and 1 more | 28 hr |
| Dec 20, 5:44 PM EST | Special Marine Warning | MFL | 46 min | |
| Dec 20, 5:48 PM EST | Special Weather Statement | MFL | Monroe | 42 min |
| Dec 20, 6:28 PM EST | Special Weather Statement | MFL | Miami-Dade | 62 min |
Nearby
Tornado Warnings in Florida, 2018Every tornado warning in 2018Tornadoes in 2018
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.