Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 27, NWS Miami, FL

June 16, 2021Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 16, 2021, 8:06 PM EDT for Collier County, Florida. It was in force for 39 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: Jun 16, 2021, 8:06 PM EDT (00:06 UTC)
Expired: Jun 16, 2021, 8:45 PM EDT
In force: 39 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 radar

The Miami radar (KAMX), 136 km from the middle of the area, began a volume at 00:04 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 nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 0.1 hours before the alert went out and 140 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 259 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 651 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 139 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

827 
WUUS52 KMFL 170006
SVRMFL
FLC021-170045-
/O.NEW.KMFL.SV.W.0027.210617T0006Z-210617T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
806 PM EDT Wed Jun 16 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Southwestern Collier County in southwestern Florida...

* Until 845 PM EDT.

* At 806 PM EDT, a severe thunderstorm was located over Marco Island,
  moving north at 30 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to roofs, siding, and trees.

* Locations impacted include...
  Naples, Marco Island, Golden Gate Estates, Everglades City and
  Carnestown.

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.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2630 8185 2622 8124 2578 8141 2588 8179
      2599 8184
TIME...MOT...LOC 0006Z 196DEG 24KT 2596 8170 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

RAG

1 follow-up statement

878 
WWUS52 KMFL 170038
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
838 PM EDT Wed Jun 16 2021

FLC021-170048-
/O.EXP.KMFL.SV.W.0027.000000T0000Z-210617T0045Z/
Collier FL-
838 PM EDT Wed Jun 16 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN COLLIER COUNTY
WILL EXPIRE AT 845 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Miami.

LAT...LON 2630 8185 2622 8124 2578 8141 2588 8179
      2599 8184
TIME...MOT...LOC 0038Z 196DEG 24KT 2616 8164 

$$

RAG

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 16, 8:14 PM EDT	Special Weather Statement	MFL	Miami-Dade	46 min
Jun 16, 8:52 PM EDT	Special Marine Warning	MFL		83 min
Jun 17, 6:41 PM EDT	Special Weather Statement	MFL	Monroe	34 min
Jun 17, 7:12 PM EDT	Special Weather Statement	MFL	Monroe	48 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021 Every severe thunderstorm warning in 2021

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.