Alert archive / Florida / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Miami, FL

June 7, 2017Collier County, Hendry County, Monroe County, Florida

NWS Miami, FL issued this severe thunderstorm warning at Jun 7, 2017, 2:33 PM EDT for Collier County, Hendry County, Monroe County, Florida. It was in force for 43 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued
Jun 7, 2017, 2:33 PM EDT (18:33 UTC)
Expired
Jun 7, 2017, 3:16 PM EDT
In force
43 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Collier County, FL, Hendry County, FL, Monroe County, FL

The radar

The Miami radar (KAMX), 128 km from the middle of the area, began a volume at 18:35 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.

What was reported inside it

TimeReportWhereRemark
Jun 7, 3:15 PM EDTMARINE TSTM WIND 391 Ssw Marco Island, FLA MARINE THUNDERSTORM WIND GUST OF 34 KTS... 39 MPH WAS RECORDED AT MARCO ISLAND MARRIOT BEACH RESORT...MESONET SITE MRCSL... AT 315 PM. THE ANEMOMETER HEIGHT IS ELEVATED ON TOP OF A BUILDING AT THIS SITE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Key West, FL (KEYW), launched 12:00Z, 6.6 hours before the alert went out and 172 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, Key West, FL at 12:00Z on 2017-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 59 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Key West, FL at 12:00Z on 2017-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -88 square meters per square second.193958Sfc1 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
59 J/kg
Mixed-layer CIN
-119 J/kg
Mixed-layer LCL
1083 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
-88 m²/s²
0-3 km storm-relative helicity
99 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.4

Open this sounding in Storm Lab

The text

As transmitted.

281 
WUUS52 KMFL 071833
SVRMFL
FLC021-051-087-071930-
/O.NEW.KMFL.SV.W.0021.170607T1833Z-170607T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Miami FL
233 PM EDT WED JUN 7 2017

The National Weather Service in Miami has issued a

* Severe Thunderstorm Warning for...
  Collier County in southwestern Florida...
  Northwestern Mainland Monroe County in southwestern Florida...
  Southwestern Hendry County in southern Florida...

* Until 330 PM EDT

* At 233 PM EDT, a line of severe thunderstorms was located 16 miles 
  southwest of Naples, moving northeast 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...
  Naples, Marco Island, Chokoloskee, Ave Maria and Golden Gate
  Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Large hail and damaging winds and continuous cloud to ground
lightning is occurring with these storms. 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 these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2633 8184 2633 8182 2632 8182 2632 8166
      2642 8166 2642 8156 2652 8156 2659 8131
      2581 8104 2580 8127 2578 8127 2578 8136
      2582 8143 2581 8152 2583 8161 2581 8167
      2587 8174 2601 8182
TIME...MOT...LOC 1833Z 247DEG 45KT 2598 8201 

HAIL...0.75IN
WIND...60MPH
 
$$

IRL
3 follow-up statements
340 
WWUS52 KMFL 071850
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
250 PM EDT WED JUN 7 2017

FLC021-051-087-071930-
/O.CON.KMFL.SV.W.0021.000000T0000Z-170607T1930Z/
Collier FL-Mainland Monroe FL-Hendry FL-
250 PM EDT WED JUN 7 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR COLLIER...NORTHWESTERN MAINLAND MONROE AND SOUTHWESTERN HENDRY
COUNTIES...

At 249 PM EDT, a line of severe thunderstorms was located near 
Naples Manor, or near Naples, moving northeast 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...
Naples, Marco Island, Chokoloskee, Ave Maria and Golden Gate Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2633 8184 2633 8182 2632 8182 2632 8166
      2642 8166 2642 8156 2652 8156 2659 8131
      2581 8104 2580 8127 2578 8127 2578 8136
      2582 8143 2581 8152 2583 8161 2581 8167
      2587 8174 2601 8182
TIME...MOT...LOC 1849Z 247DEG 45KT 2606 8180 

HAIL...0.75IN
WIND...60MPH
 
$$

IRL
209 
WWUS52 KMFL 071902
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
302 PM EDT WED JUN 7 2017

FLC021-051-087-071930-
/O.CON.KMFL.SV.W.0021.000000T0000Z-170607T1930Z/
Collier FL-Mainland Monroe FL-Hendry FL-
302 PM EDT WED JUN 7 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR COLLIER...NORTHWESTERN MAINLAND MONROE AND SOUTHWESTERN HENDRY
COUNTIES...

At 302 PM EDT, a line of severe thunderstorms was located over West 
Toll Gate On Alligator Alley, or 7 miles south of Golden Gate 
Estates, moving northeast 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...
Naples, Marco Island, Chokoloskee, Ave Maria and Golden Gate Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Continuous cloud to ground lightning is occurring with these storms.
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 these storms, and may lead to 
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2633 8184 2633 8182 2632 8182 2632 8166
      2642 8166 2642 8156 2652 8156 2659 8131
      2581 8104 2580 8127 2578 8127 2578 8136
      2582 8143 2581 8152 2583 8161 2581 8167
      2587 8174 2601 8182
TIME...MOT...LOC 1902Z 247DEG 45KT 2613 8163 

HAIL...0.75IN
WIND...60MPH
 
$$

IRL
184 
WWUS52 KMFL 071916
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
316 PM EDT WED JUN 7 2017

FLC021-051-087-071926-
/O.CAN.KMFL.SV.W.0021.000000T0000Z-170607T1930Z/
Collier FL-Mainland Monroe FL-Hendry FL-
316 PM EDT WED JUN 7 2017

...THE SEVERE THUNDERSTORM WARNING FOR COLLIER...NORTHWESTERN
MAINLAND MONROE AND SOUTHWESTERN HENDRY COUNTIES IS CANCELLED...
                
The storms which prompted the warning have weakened below severe 
limits, and no longer poses an immediate threat to life or property.
Therefore the warning has been cancelled.  However gusty winds of 45 
to 55 mph and heavy rain are still possible with this thunderstorm. 
A Special Weather Statement is now in effect.

LAT...LON 2633 8184 2633 8182 2632 8182 2632 8166
      2642 8166 2642 8156 2652 8156 2659 8131
      2581 8104 2580 8127 2578 8127 2578 8136
      2582 8143 2581 8152 2583 8161 2581 8167
      2587 8174 2601 8182
TIME...MOT...LOC 1915Z 247DEG 45KT 2620 8145 

$$

IRL

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 6, 8:10 PM EDTSpecial Marine WarningMFL95 min
Jun 6, 8:12 PM EDTAreal Flood WarningMFLCollier, Hendry6 hr
Jun 6, 8:14 PM EDTSpecial Marine WarningMFL91 min
Jun 6, 8:32 PM EDTSpecial Marine WarningMFL58 min
Jun 6, 8:40 PM EDTSpecial Weather StatementMFLHendry50 min
Jun 6, 10:32 PM EDTSpecial Weather StatementMFLBroward, Miami-Dade43 min
Jun 6, 10:57 PM EDTSpecial Marine WarningMFL48 min
Jun 7, 1:47 AM EDTFlash Flood WarningMFLBroward, Palm Beach3 hr
Jun 7, 4:07 AM EDTSmall Craft AdvisoryMFL16 hr
Jun 7, 4:51 AM EDTAreal Flood WarningMFLBroward, Palm Beach6 hr
Jun 7, 5:59 AM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade3 hr
Jun 7, 9:10 AM EDTAreal Flood AdvisoryMFLCollier9 hr
Jun 7, 9:40 AM EDTAreal Flood AdvisoryMFLMiami-Dade3 hr
Jun 7, 10:35 AM EDTAreal Flood AdvisoryMFLBroward, Palm Beach3 hr
Jun 7, 12:36 PM EDTSpecial Marine WarningMFL114 min
Jun 7, 12:48 PM EDTSpecial Weather StatementMFLCollier, Glades, Hendry42 min
Jun 7, 1:25 PM EDTSpecial Weather StatementMFLGlades, Hendry65 min
Jun 7, 1:33 PM EDTSpecial Marine WarningMFL57 min
Jun 7, 2:21 PM EDTSpecial Marine WarningMFL84 min
Jun 7, 2:21 PM EDTSpecial Marine WarningMFL54 min
Jun 7, 2:24 PM EDTSpecial Weather StatementMFLHendry51 min
Jun 7, 3:05 PM EDTSpecial Weather StatementMFLPalm Beach40 min
Jun 7, 3:15 PM EDTSpecial Weather StatementMFLCollier, Hendry45 min
Jun 7, 3:39 PM EDTSpecial Marine WarningMFL96 min
Jun 7, 3:44 PM EDTSpecial Marine WarningMFL91 min
Jun 7, 4:11 PM EDTAreal Flood WarningMFLCollier5 hr
Jun 7, 4:42 PM EDTSpecial Weather StatementMFLBroward, Palm Beach48 min
Jun 7, 5:23 PM EDTAreal Flood WarningMFLBroward, Palm Beach6 hr
Jun 7, 5:38 PM EDTAreal Flood AdvisoryMFLBroward, Miami-Dade6 hr
Jun 7, 6:35 PM EDTSpecial Marine WarningMFL55 min
Jun 7, 6:39 PM EDTSpecial Marine WarningMFL66 min
Jun 7, 6:50 PM EDTSpecial Weather StatementMFLMiami-Dade25 min
Jun 7, 6:58 PM EDTSpecial Marine WarningMFL92 min

Nearby

Severe Thunderstorm Warnings in Florida, 2017Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.