Alert archive / Florida / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 32, NWS Miami, FL

June 23, 2021Collier County, Monroe County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 23, 2021, 2:29 PM EDT for Collier County, Monroe 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
Jun 23, 2021, 2:29 PM EDT (18:29 UTC)
Expired
Jun 23, 2021, 3:00 PM EDT
In force
31 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Collier County, FL, Monroe County, FL

The radar

The Miami radar (KAMX), 73 km from the middle of the area, began a volume at 18:29 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, 6.5 hours before the alert went out and 82 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-pSkew-T log-p diagram, Miami, FL at 12:00Z on 2021-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 431 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 12:00Z on 2021-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -29 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
431 J/kg
Mixed-layer CIN
-123 J/kg
Mixed-layer LCL
1206 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
-29 m²/s²
0-3 km storm-relative helicity
22 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

917 
WUUS52 KMFL 231829
SVRMFL
FLC021-087-231900-
/O.NEW.KMFL.SV.W.0032.210623T1829Z-210623T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
229 PM EDT Wed Jun 23 2021

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Southern Collier County in southwestern Florida...
  North central Mainland Monroe County in southwestern Florida...

* Until 300 PM EDT.

* At 229 PM EDT, a severe thunderstorm was located 8 miles northwest
  of Loop Road Ee Center, or 16 miles east of Chokoloskee, and is
  nearly stationary.

  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...
  Big Cypress National Preserve.

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.

Large hail and 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.

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

&&

LAT...LON 2577 8120 2588 8115 2586 8097 2572 8103
TIME...MOT...LOC 1829Z 001DEG 1KT 2581 8110 

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

BAXTER
1 follow-up statement
670 
WWUS52 KMFL 231855
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
255 PM EDT Wed Jun 23 2021

FLC021-087-231905-
/O.EXP.KMFL.SV.W.0032.000000T0000Z-210623T1900Z/
Collier FL-Mainland Monroe FL-
255 PM EDT Wed Jun 23 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN COLLIER AND NORTH
CENTRAL MAINLAND MONROE COUNTIES WILL EXPIRE AT 300 PM EDT...
        
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning will
be allowed to expire.  However small hail, gusty winds and heavy rain
are still possible with this thunderstorm.

LAT...LON 2577 8120 2588 8115 2586 8097 2572 8103
TIME...MOT...LOC 1855Z 001DEG 1KT 2580 8110 

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 8:38 PM EDTSpecial Marine WarningMFL40 min
Jun 22, 9:37 PM EDTSpecial Weather StatementMFLBroward53 min
Jun 22, 10:38 PM EDTSpecial Weather StatementMFLBroward52 min
Jun 22, 11:06 PM EDTAreal Flood AdvisoryMFLBroward114 min
Jun 22, 11:27 PM EDTSpecial Weather StatementMFLBroward48 min
Jun 23, 12:34 AM EDTSpecial Marine WarningMFL56 min
Jun 23, 11:14 AM EDTSpecial Weather StatementMFLHendry46 min
Jun 23, 11:45 AM EDTSpecial Marine WarningMFL30 min
Jun 23, 11:58 AM EDTSpecial Weather StatementMFLHendry47 min
Jun 23, 12:22 PM EDTSevere Thunderstorm WarningMFLCollier, Hendry24 min
Jun 23, 12:30 PM EDTSpecial Weather StatementMFLPalm Beach45 min
Jun 23, 12:48 PM EDTSpecial Weather StatementMFLHendry42 min
Jun 23, 1:03 PM EDTSpecial Weather StatementMFLBroward42 min
Jun 23, 1:05 PM EDTSpecial Weather StatementMFLMartin40 min
Jun 23, 1:32 PM EDTSpecial Weather StatementMFLCollier43 min
Jun 23, 1:46 PM EDTSpecial Weather StatementMFLPalm Beach44 min
Jun 23, 1:47 PM EDTSpecial Weather StatementMFLBroward43 min
Jun 23, 2:11 PM EDTSpecial Weather StatementMFLCollier49 min
Jun 23, 2:25 PM EDTSpecial Weather StatementMFLMonroe50 min
Jun 23, 2:25 PM EDTSpecial Weather StatementMFLPalm Beach50 min
Jun 23, 2:33 PM EDTSpecial Marine WarningMFL42 min
Jun 23, 2:54 PM EDTSpecial Weather StatementMFLPalm Beach51 min
Jun 23, 3:02 PM EDTSpecial Weather StatementMFLMonroe43 min
Jun 23, 3:12 PM EDTSpecial Weather StatementMFLBroward48 min
Jun 23, 3:37 PM EDTSpecial Marine WarningMFL68 min
Jun 23, 3:41 PM EDTSpecial Weather StatementMFLMonroe64 min
Jun 23, 4:37 PM EDTSpecial Weather StatementMFLMonroe53 min
Jun 23, 5:59 PM EDTAreal Flood AdvisoryMFLMiami-Dade56 min

Nearby

Severe Thunderstorm Warnings in Florida, 2021Every 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.