Alert archive / Florida / Tornado Warnings in 2017

Tornado Warning 17, NWS Miami, FL

September 9, 2017Miami-Dade County, Monroe County, Florida

NWS Miami, FL issued this tornado warning at Sep 9, 2017, 9:23 AM EDT for Miami-Dade County, Monroe County, Florida. It was in force for 9 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, 9:23 AM EDT (13:23 UTC)
Expired
Sep 9, 2017, 9:32 AM EDT
In force
9 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
0.0 in

Counties Miami-Dade County, FL, Monroe County, FL

The radar

The Miami radar (KAMX), 33 km from the middle of the area, began a volume at 13:22 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, 1.4 hours before the alert went out and 50 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.

887 
WFUS52 KMFL 091323
TORMFL
FLC086-087-091415-
/O.NEW.KMFL.TO.W.0017.170909T1323Z-170909T1415Z/

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

The National Weather Service in Miami has issued a

* Tornado Warning for...
  Northeastern Mainland Monroe County in southwestern Florida...
  West central Miami-Dade County in southeastern Florida...

* Until 1015 AM EDT
    
* At 923 AM EDT, a severe thunderstorm capable of producing a tornado
  was located 8 miles northwest of Homestead General Airport, moving
  west at 50 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...
  Shark Valley Obs Tower around 935 AM EDT. 
  Big Cypress National Preserve around 950 AM EDT. 
  Loop Road Ee Center around 955 AM EDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to an interior room on the lowest floor of a
sturdy building and 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 2564 8054 2555 8056 2551 8105 2577 8102
TIME...MOT...LOC 1323Z 098DEG 43KT 2561 8060 

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

$$

Gregoria
1 follow-up statement
866 
WWUS52 KMFL 091332
SVSMFL

Severe Weather Statement
National Weather Service Miami FL
932 AM EDT SAT SEP 9 2017

FLC086-087-091341-
/O.CAN.KMFL.TO.W.0017.000000T0000Z-170909T1415Z/
Mainland Monroe FL-Miami-Dade FL-
932 AM EDT SAT SEP 9 2017

...THE TORNADO WARNING FOR NORTHEASTERN MAINLAND MONROE AND WEST
CENTRAL MIAMI-DADE COUNTIES IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been cancelled.

LAT...LON 2564 8054 2555 8056 2551 8105 2577 8102
TIME...MOT...LOC 1330Z 098DEG 43KT 2562 8072 

$$

Gregoria

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, 9:35 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, 12:22 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.