Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 23, NWS Miami, FL

May 31, 2021Collier County, Florida

NWS Miami, FL issued this severe thunderstorm warning at May 31, 2021, 4:59 PM EDT for Collier County, Florida. It was in force for 31 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: May 31, 2021, 4:59 PM EDT (20:59 UTC)
Expired: May 31, 2021, 5:30 PM EDT
In force: 31 min
Issued by: NWS Miami, FL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Collier County, FL

The radar

The Miami radar (KAMX), 141 km from the middle of the area, began a volume at 21:01 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 12:00Z, 9.0 hours before the alert went out and 146 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: 1852 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 869 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 10 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

282 
WUUS52 KMFL 312059
SVRMFL
FLC021-312130-
/O.NEW.KMFL.SV.W.0023.210531T2059Z-210531T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
459 PM EDT Mon May 31 2021

The National Weather Service in Miami has issued a

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

* Until 530 PM EDT.

* At 459 PM EDT, severe thunderstorms were located along a line
  extending from near Naples Park to near Royal Palm Hammock, moving
  northwest at 20 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Naples, Marco Island, Golden Gate Estates, Naples Park and Cape
  Romano.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 2627 8185 2629 8170 2587 8139 2580 8166
      2609 8184
TIME...MOT...LOC 2059Z 129DEG 20KT 2624 8184 2596 8161 

HAIL...1.00IN
WIND...60MPH
 
$$

CWC

1 follow-up statement

894 
WWUS52 KMFL 312115
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
515 PM EDT Mon May 31 2021

FLC021-312130-
/O.CON.KMFL.SV.W.0023.000000T0000Z-210531T2130Z/
Collier FL-
515 PM EDT Mon May 31 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHWESTERN COLLIER COUNTY...

At 513 PM EDT, severe thunderstorms were located along a line
extending from near Naples Park to Marco Island Airport, moving
northwest at 10 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Hail damage to vehicles is expected. Expect wind damage to 
         roofs, siding, and trees.

Locations impacted include...
Naples, Marco Island, Golden Gate Estates, Cape Romano and Belle
Meade.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 2616 8185 2619 8169 2587 8139 2580 8166
      2609 8184
TIME...MOT...LOC 2113Z 129DEG 20KT 2628 8190 2600 8167 

HAIL...1.00IN
WIND...60MPH
 
$$

CWC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 31, 12:33 PM EDT	Special Weather Statement	MFL	Monroe	57 min
May 31, 1:15 PM EDT	Special Weather Statement	MFL	Broward	45 min
May 31, 3:33 PM EDT	Special Weather Statement	MFL	Hendry	42 min
May 31, 3:49 PM EDT	Special Weather Statement	MFL	Collier	41 min
May 31, 4:08 PM EDT	Special Marine Warning	MFL		67 min
May 31, 4:13 PM EDT	Special Weather Statement	MFL	Collier	47 min
May 31, 4:29 PM EDT	Severe Thunderstorm Warning	MFL	Collier	31 min
May 31, 4:40 PM EDT	Special Marine Warning	MFL		35 min
May 31, 5:13 PM EDT	Special Marine Warning	MFL		47 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.