Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 19, NWS Miami, FL

September 9, 2017Collier County, Florida

NWS Miami, FL issued this tornado warning at Sep 9, 2017, 12:08 PM EDT for Collier County, Florida. It was in force for 22 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, 12:08 PM EDT (16:08 UTC)
Expired
Sep 9, 2017, 12:30 PM EDT
In force
22 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.75 in

County Collier County, FL

The radar

The Miami radar (KAMX), 88 km from the middle of the area, began a volume at 16:11 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, 4.1 hours before the alert went out and 95 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.

465 
WFUS52 KMFL 091608
TORMFL
FLC021-091630-
/O.NEW.KMFL.TO.W.0019.170909T1608Z-170909T1630Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Miami FL
1208 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 1230 PM EDT
    
* At 1208 PM EDT, a severe thunderstorm capable of producing a
  tornado was located 10 miles southwest of Big Cypress National
  Preserve, or 11 miles northeast of Chokoloskee, 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. 

* This dangerous storm will be near...
  Everglades City, Carnestown and Plantation Island around 1225 PM 
  EDT. 
  Everglades National Park around 1230 PM EDT. 

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 2592 8113 2584 8113 2583 8140 2596 8139
TIME...MOT...LOC 1608Z 091DEG 38KT 2588 8117 

TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

BAXTER
1 follow-up statement
589 
WWUS52 KMFL 091616
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
1216 PM EDT SAT SEP 9 2017

FLC021-091630-
/O.CON.KMFL.TO.W.0019.000000T0000Z-170909T1630Z/
Collier FL-
1216 PM EDT SAT SEP 9 2017

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1230 PM EDT FOR SOUTH
CENTRAL COLLIER COUNTY...
    
At 1215 PM EDT, a severe thunderstorm capable of producing a tornado 
was located 7 miles northeast of Chokoloskee crossing US 41, moving 
west 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. 

This dangerous storm will be near...
  Everglades City, Plantation Island, Carnestown and Everglades 
  National Park around 1230 PM EDT. 

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.

Motorists should not take shelter under highway overpasses. If you
cannot safely drive away from the tornado, as a last resort, either
park your vehicle and stay put, or abandon your vehicle and lie down
in a low lying area and protect yourself from flying debris.

If a tornado or other severe weather is spotted, report it to the
National Weather Service or your local nearest law enforcement agency
who will send your report. This act may save lives of others in the
path of dangerous weather.

&&

LAT...LON 2591 8116 2584 8117 2583 8140 2595 8139
TIME...MOT...LOC 1615Z 085DEG 33KT 2588 8123 

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

$$

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, 12:22 PM EDTTornado WarningMFLCollier23 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.