Alert archive / Florida / Tornado Warnings in 2009

Tornado Warning 9, NWS Miami, FL

December 18, 2009Miami-Dade County, Florida

NWS Miami, FL issued this tornado warning at Dec 18, 2009, 9:38 AM EST for Miami-Dade County, Florida. It was in force for 67 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
Dec 18, 2009, 9:38 AM EST (14:38 UTC)
Expired
Dec 18, 2009, 10:45 AM EST
In force
67 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Miami-Dade County, FL

The radar

The Miami radar (KAMX), 11 km from the middle of the area, began a volume at 14:39 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
Dec 18, 7:19 AM ESTTornado WatchSPC7 hr

The nearest sounding before it

Miami, FL (KMFL), launched 12:00Z, 2.6 hours before the alert went out and 32 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 2009-12-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1076 joules per kilogram.LCLEL10008507005003002001001 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, Miami, FL at 12:00Z on 2009-12-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 183 square meters per square second.19395878Sfc1 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
1076 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
717 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
183 m²/s²
0-3 km storm-relative helicity
222 m²/s²
Significant tornado parameter
1.6
Supercell composite
6.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WFUS52 KMFL 181438
TORMFL
FLC086-181545-
/O.NEW.KMFL.TO.W.0009.091218T1438Z-091218T1545Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
938 AM EST FRI DEC 18 2009

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL MIAMI-DADE COUNTY IN SOUTHEAST FLORIDA...
  THIS INCLUDES THE CITIES OF...HOMESTEAD MIAMI SPEEDWAY...
  HOMESTEAD...

* UNTIL 1045 AM EST

* AT 938 AM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR HOMESTEAD
  MIAMI SPEEDWAY...MOVING NORTHWARD AT 20 MPH.

  THIS STORM IS ALSO CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
  60 MPH.

* THE TORNADO WILL BE NEAR...
  FLORIDA CITY...
  HOMESTEAD MIAMI SPEEDWAY...
  PRINCETON...
  GOULDS...
  CUTLER BAY...
  CUTLER RIDGE...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE NEAR THE PATH OF A TORNADO...SEEK SHELTER IN A STURDY
BUILDING ON THE LOWEST FLOOR...AWAY FROM OUTSIDE WALLS AND WINDOWS.
GET UNDER A WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. USE
BLANKETS OR PILLOWS TO COVER YOUR BODY AND STAY AWAY FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 100 PM EST FRIDAY AFTERNOON
FOR SOUTHERN FLORIDA.

&&

LAT...LON 2563 8027 2561 8030 2554 8030 2553 8032
      2550 8033 2546 8033 2544 8031 2535 8035
      2538 8052 2569 8047 2565 8027
TIME...MOT...LOC 1438Z 195DEG 16KT 2540 8042

$$

70/DD

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 17, 7:13 PM ESTFlash Flood WarningMFLBroward2 hr
Dec 17, 7:32 PM ESTAreal Flood AdvisoryMFLBroward, Miami-Dade, Palm Beach3 hr
Dec 17, 7:40 PM ESTFlash Flood WarningMFLBroward, Miami-Dade110 min
Dec 17, 8:25 PM ESTSpecial Marine WarningMFL35 min
Dec 17, 9:05 PM ESTSpecial Marine WarningMFL55 min
Dec 17, 9:19 PM ESTFlash Flood WarningMFLBroward, Miami-Dade116 min
Dec 17, 10:16 PM ESTSpecial Marine WarningMFL59 min
Dec 17, 10:26 PM ESTFlash Flood WarningMFLBroward, Palm Beach3 hr
Dec 17, 10:35 PM ESTAreal Flood AdvisoryMFLBroward, Palm Beach3 hr
Dec 17, 11:16 PM ESTAreal Flood WarningMFLBroward, Miami-Dade6 hr
Dec 18, 1:47 AM ESTAreal Flood AdvisoryMFLBroward, Palm Beach3 hr
Dec 18, 5:13 AM ESTAreal Flood WarningMFLBroward, Palm Beach3 hr
Dec 18, 7:16 AM ESTSpecial Marine WarningMFL59 min
Dec 18, 7:17 AM ESTSpecial Marine WarningMFL58 min
Dec 18, 8:01 AM ESTAreal Flood WarningMFLBroward, Palm Beach3 hr
Dec 18, 8:29 AM ESTSpecial Marine WarningMFL61 min
Dec 18, 8:40 AM ESTSpecial Marine WarningMFL23 min
Dec 18, 8:47 AM ESTSpecial Weather StatementMFLCollier28 min
Dec 18, 8:51 AM ESTTornado WarningMFLCollier44 min
Dec 18, 9:06 AM ESTSpecial Weather StatementMFLHendry24 min
Dec 18, 9:11 AM ESTSpecial Marine WarningMFL64 min
Dec 18, 9:14 AM ESTSpecial Marine WarningMFL46 min
Dec 18, 9:15 AM ESTSpecial Weather StatementMFLBroward30 min
Dec 18, 9:18 AM ESTSpecial Weather StatementMFLMiami-Dade27 min
Dec 18, 9:28 AM ESTSpecial Weather StatementMFLCollier47 min
Dec 18, 9:31 AM ESTSpecial Weather StatementMFLHendry29 min
Dec 18, 9:32 AM ESTGale WarningMFL12 hr
Dec 18, 9:55 AM ESTSpecial Marine WarningMFL65 min
Dec 18, 10:24 AM ESTSpecial Marine WarningMFL51 min
Dec 18, 10:26 AM ESTSpecial Weather StatementMFLCollier, Monroe64 min
Dec 18, 10:27 AM ESTTornado WarningMFLMiami-Dade63 min
Dec 18, 10:48 AM ESTSpecial Marine WarningMFL57 min
Dec 18, 11:04 AM ESTAreal Flood WarningMFLBroward, Miami-Dade, Palm Beach4 hr
Dec 18, 11:20 AM ESTSpecial Weather StatementMFLBroward, Miami-Dade, Palm Beach55 min
Dec 18, 11:24 AM ESTSpecial Marine WarningMFL51 min
Dec 18, 11:48 AM ESTSpecial Weather StatementMFLBroward42 min
Dec 18, 11:52 AM ESTSpecial Weather StatementMFLBroward38 min
Dec 18, 12:19 PM ESTSpecial Marine WarningMFL56 min
Dec 18, 12:38 PM ESTSpecial Weather StatementMFLMiami-Dade22 min
Dec 18, 1:00 PM ESTTornado WarningMFLMiami-Dade30 min
Dec 18, 1:01 PM ESTSpecial Weather StatementMFLMiami-Dade44 min
Dec 18, 1:19 PM ESTSpecial Marine WarningMFL116 min
Dec 18, 3:06 PM ESTAreal Flood WarningMFLBroward, Miami-Dade4 hr
Dec 18, 3:14 PM ESTSpecial Marine WarningMFL25 min
Dec 18, 3:50 PM ESTSpecial Weather StatementMFLMiami-Dade40 min
Dec 18, 4:34 PM ESTSpecial Marine WarningMFL86 min

Nearby

Tornado Warnings in Florida, 2009Every tornado warning in 2009Tornadoes in 2009

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.