Alert archive / Florida / Severe Thunderstorm Warnings in 2018
Severe Thunderstorm Warning 2, NWS Miami, FL
NWS Miami, FL issued this severe thunderstorm warning at Mar 20, 2018, 8:22 PM EDT for Collier County, Florida. It was in force for 23 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
- Mar 20, 2018, 8:22 PM EDT (00:22 UTC)
- Expired
- Mar 20, 2018, 8:45 PM EDT
- In force
- 23 min
- Issued by
- NWS Miami, FL
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 0.75 in
- Wind
- 60.0 mph
County Collier County, FL
The nearest sounding before it
Miami, FL (KMFL), launched 00:00Z, 0.4 hours before the alert went out and 125 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
- 625 J/kg
- Mixed-layer CIN
- -89 J/kg
- Mixed-layer LCL
- 1124 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.5
The text
As transmitted.
303
WUUS52 KMFL 210022
SVRMFL
FLC021-210045-
/O.NEW.KMFL.SV.W.0002.180321T0022Z-180321T0045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
822 PM EDT TUE MAR 20 2018
The National Weather Service in Miami has issued a
* Severe Thunderstorm Warning for...
Southwestern Collier County in southwestern Florida...
* Until 845 PM EDT.
* At 821 PM EDT, a severe thunderstorm was located near Belle Meade,
or near Marco Island, moving east at 50 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Marco Island, Carnestown, Marco Island Airport, Belle Meade and
Naples Manor.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into a
closet or small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
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.
Damaging winds and continuous cloud to ground lightning is occurring
with this storm. Move indoors immediately. Lightning is one of
nature's leading killers. Remember, if you can hear thunder, you are
close enough to be struck by lightning.
&&
LAT...LON 2619 8126 2592 8122 2587 8178 2589 8179
2607 8183
TIME...MOT...LOC 0021Z 261DEG 42KT 2600 8172
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$2 follow-up statements
999
WWUS52 KMFL 210039
SVSMFL
Severe Weather Statement
National Weather Service Miami FL
839 PM EDT TUE MAR 20 2018
FLC021-210045-
/O.CON.KMFL.SV.W.0002.000000T0000Z-180321T0045Z/
Collier FL-
839 PM EDT TUE MAR 20 2018
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM EDT
FOR SOUTHWESTERN COLLIER COUNTY...
At 838 PM EDT, a severe thunderstorm was located near Copeland, or 7
miles northwest of Everglades City, moving east at 55 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Carnestown, Royal Palm Hammock, Copeland, South Blocks Golde and
Fakahatchee Strand State Preserve.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into a
small central room in a sturdy structure.
For your protection move to an interior room on the lowest floor of a
building.
To report severe weather contact your nearest law enforcement agency.
They will send your report to the National Weather Service office in
Miami. You can also share your report with NWS Miami on Facebook and
Twitter.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 2606 8167 2613 8129 2592 8124 2589 8158
2596 8162 2601 8164
TIME...MOT...LOC 0038Z 271DEG 47KT 2596 8144
TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH
$$382
WWUS52 KMFL 210045
SVSMFL
Severe Weather Statement
National Weather Service Miami FL
845 PM EDT TUE MAR 20 2018
FLC021-210055-
/O.EXP.KMFL.SV.W.0002.000000T0000Z-180321T0045Z/
Collier FL-
845 PM EDT TUE MAR 20 2018
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COLLIER COUNTY
HAS EXPIRED...
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been allowed to expire. However gusty
winds are still possible with this thunderstorm.
LAT...LON 2606 8167 2613 8129 2592 8124 2589 8158
2596 8162 2601 8164
TIME...MOT...LOC 0045Z 261DEG 42KT 2597 8136
$$
13The office that day
Everything else NWS Miami, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 8:12 PM EDT | Special Weather Statement | MFL | Collier | 33 min |
| Mar 20, 8:48 PM EDT | Special Weather Statement | MFL | Collier | 57 min |
| Mar 20, 9:48 PM EDT | Special Weather Statement | MFL | Monroe | 57 min |
| Mar 21, 3:37 AM EDT | Rip Current Statement | MFL | Collier | 17 hr |
| Mar 21, 3:42 AM EDT | Red Flag Warning | MFL | Broward, Miami-Dade, Palm Beach | 15 hr |
Nearby
Severe Thunderstorm Warnings in Florida, 2018Every severe thunderstorm warning 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.