Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 20, NWS Miami, FL

September 9, 2017Collier County, Florida

NWS Miami, FL issued this tornado warning at Sep 9, 2017, 12:22 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
Sep 9, 2017, 12:22 PM EDT (16:22 UTC)
Expired
Sep 9, 2017, 12:45 PM EDT
In force
23 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

County Collier County, FL

The radar

The Miami radar (KAMX), 101 km from the middle of the area, began a volume at 16:26 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Sep 9, 12:09 PM EDTTornado WatchSPC12 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 4.4 hours before the alert went out and 109 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 2017-09-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1745 joules per kilogram.LCLEL10008507005003002001001 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 2017-09-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 182 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
1745 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
926 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
182 m²/s²
0-3 km storm-relative helicity
212 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

385 
WFUS52 KMFL 091622
TORMFL
FLC021-091645-
/O.NEW.KMFL.TO.W.0020.170909T1622Z-170909T1645Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Miami FL
1222 PM EDT SAT SEP 9 2017

The National Weather Service in Miami has issued a

* Tornado Warning for...
  South central Collier County in southwestern Florida...

* Until 1245 PM EDT
    
* At 1222 PM EDT, a severe thunderstorm capable of producing a
  tornado was located near Carnestown, or near Chokoloskee, moving
  west southwest at 40 mph.

  HAZARD...Tornado. 

  SOURCE...Radar indicated rotation. 

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely. 

* Locations impacted include...
  Everglades City, Chokoloskee, Plantation Island and Carnestown. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building. Avoid windows. If you are outdoors, in a mobile
home, or in a vehicle, move to the closest substantial shelter and
protect yourself from flying debris.

&&

LAT...LON 2593 8147 2592 8123 2583 8123 2579 8147
TIME...MOT...LOC 1622Z 085DEG 33KT 2588 8128 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

BAXTER
2 follow-up statements
926 
WWUS52 KMFL 091633
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1233 PM EDT SAT SEP 9 2017

FLC021-091645-
/O.CON.KMFL.TO.W.0020.000000T0000Z-170909T1645Z/
Collier FL-
1233 PM EDT SAT SEP 9 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1245 PM EDT FOR SOUTHERN
COLLIER COUNTY...
    
At 1233 PM EDT, a severe thunderstorm capable of producing a tornado
was located near Everglades City, moving west at 45 mph.

HAZARD...Tornado. 

SOURCE...Radar indicated rotation. 

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely. 

Locations impacted include...
Everglades City, Chokoloskee, Plantation Island and Carnestown. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 2593 8147 2591 8135 2581 8136 2579 8147
TIME...MOT...LOC 1633Z 087DEG 40KT 2586 8143 

TORNADO...RADAR INDICATED
HAIL...0.00IN

$$

BAXTER
722 
WWUS52 KMFL 091638
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1238 PM EDT SAT SEP 9 2017

FLC021-091648-
/O.EXP.KMFL.TO.W.0020.000000T0000Z-170909T1645Z/
Collier FL-
1238 PM EDT SAT SEP 9 2017

...THE TORNADO WARNING FOR SOUTHERN COLLIER COUNTY WILL EXPIRE AT
1245 PM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until midnight EDT for southwestern
Florida.

LAT...LON 2593 8147 2591 8135 2581 8136 2579 8147
TIME...MOT...LOC 1638Z 085DEG 33KT 2586 8147 

$$

BAXTER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 9, 12:32 AM EDTSpecial Weather StatementMFLMiami-Dade58 min
Sep 9, 5:43 AM EDTSpecial Weather StatementMFLMiami-Dade47 min
Sep 9, 6:44 AM EDTSpecial Weather StatementMFLMiami-Dade61 min
Sep 9, 7:03 AM EDTSpecial Weather StatementMFLMiami-Dade42 min
Sep 9, 7:54 AM EDTSpecial Weather StatementMFLMonroe66 min
Sep 9, 8:55 AM EDTSpecial Weather StatementMFLMiami-Dade50 min
Sep 9, 9:16 AM EDTSpecial Weather StatementMFLCollier44 min
Sep 9, 9:17 AM EDTSpecial Weather StatementMFLMiami-Dade28 min
Sep 9, 9:23 AM EDTTornado WarningMFLMiami-Dade, Monroe9 min
Sep 9, 9:35 AM EDTSpecial Weather StatementMFLMonroe40 min
Sep 9, 9:52 AM EDTTornado WarningMFLCollier23 min
Sep 9, 10:40 AM EDTSpecial Weather StatementMFLMiami-Dade50 min
Sep 9, 10:57 AM EDTSpecial Weather StatementMFLCollier33 min
Sep 9, 11:19 AM EDTSpecial Weather StatementMFLMiami-Dade41 min
Sep 9, 11:37 AM EDTSpecial Weather StatementMFLCollier38 min
Sep 9, 12:01 PM EDTSpecial Marine WarningMFL14 min
Sep 9, 12:04 PM EDTSpecial Weather StatementMFLMiami-Dade26 min
Sep 9, 12:05 PM EDTSpecial Weather StatementMFLCollier55 min
Sep 9, 12:08 PM EDTTornado WarningMFLCollier22 min
Sep 9, 12:24 PM EDTSpecial Marine WarningMFL36 min
Sep 9, 12:36 PM EDTSpecial Weather StatementMFLMiami-Dade39 min
Sep 9, 4:13 PM EDTSpecial Marine WarningMFL32 min
Sep 9, 4:43 PM EDTSpecial Marine WarningMFL47 min
Sep 9, 4:46 PM EDTTornado WarningMFLBroward29 min
Sep 9, 4:48 PM EDTTornado WarningMFLCollier27 min
Sep 9, 5:34 PM EDTSpecial Marine WarningMFL26 min
Sep 9, 5:58 PM EDTSpecial Marine WarningMFL32 min
Sep 9, 6:16 PM EDTSpecial Marine WarningMFL29 min
Sep 9, 6:18 PM EDTSpecial Marine WarningMFL27 min
Sep 9, 6:22 PM EDTTornado WarningMFLBroward, Palm Beach38 min
Sep 9, 6:30 PM EDTTornado WarningMFLBroward30 min
Sep 9, 6:32 PM EDTSpecial Marine WarningMFL43 min
Sep 9, 6:38 PM EDTSpecial Marine WarningMFL37 min
Sep 9, 6:43 PM EDTSpecial Marine WarningMFL47 min
Sep 9, 6:54 PM EDTTornado WarningMFLHendry, Palm Beach36 min
Sep 9, 6:59 PM EDTTornado WarningMFLBroward31 min
Sep 9, 7:02 PM EDTTornado WarningMFLMiami-Dade13 min
Sep 9, 7:12 PM EDTTornado WarningMFLPalm Beach48 min
Sep 9, 7:13 PM EDTSpecial Marine WarningMFL47 min
Sep 9, 7:16 PM EDTSpecial Marine WarningMFL59 min
Sep 9, 7:24 PM EDTSpecial Marine WarningMFL51 min
Sep 9, 7:27 PM EDTTornado WarningMFLBroward33 min
Sep 9, 7:29 PM EDTTornado WarningMFLMiami-Dade26 min
Sep 9, 7:52 PM EDTTornado WarningMFLBroward, Miami-Dade23 min

Nearby

Tornado Warnings in Florida, 2017Every tornado warning in 2017Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.