Alert archive / Florida / Tornado Warnings in 2011

Tornado Warning 12, NWS Miami, FL

October 30, 2011Miami-Dade County, Florida

NWS Miami, FL issued this tornado warning at Oct 30, 2011, 8:55 PM EDT for Miami-Dade 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
Oct 30, 2011, 8:55 PM EDT (00:55 UTC)
Expired
Oct 30, 2011, 9:18 PM EDT
In force
23 min
Issued by
NWS Miami, FL
Area
Storm-based polygon

County Miami-Dade County, FL

The nearest sounding before it

Miami, FL (KMFL), launched 00:00Z, 0.9 hours before the alert went out and 20 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 00:00Z on 2011-10-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 860 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 00:00Z on 2011-10-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 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
860 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
505 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.5

Open this sounding in Storm Lab

The text

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

926 
WFUS52 KMFL 310055
TORMFL
FLC086-310145-
/O.NEW.KMFL.TO.W.0012.111031T0055Z-111031T0145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MIAMI FL
855 PM EDT SUN OCT 30 2011

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL MIAMI-DADE COUNTY IN SOUTHEAST FLORIDA...
  THIS INCLUDES THE CITIES OF...SOUTH MIAMI...KENDALL...

* UNTIL 945 PM EDT

* AT 853 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR PERRINE...
  MOVING NORTH AT 5 MPH.

  THIS STORM IS ALSO CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN EXCESS
  OF 70 MPH.

* THE TORNADO WILL BE NEAR...
  PERRINE...
  PINECREST...
  AND SURROUNDING COMMUNITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEEK SHELTER INSIDE A STURDY BUILDING ON THE LOWEST FLOOR...AWAY FROM
EXTERIOR WALLS AND WINDOWS. GET UNDER A WORKBENCH OR OTHER PIECE OF
STURDY FURNITURE. USE BLANKETS OR PILLOWS TO COVER YOUR BODY.

TAKE COVER NOW IN A STURDY REINFORCED BUILDING. TORNADOES ARE
ESPECIALLY DANGEROUS AT NIGHT BECAUSE THEY ARE HARD TO SEE. IF YOU
WAIT UNTIL YOU SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A
SAFE PLACE! MOVE TO AN INTERIOR ROOM OR HALLWAY ON THE LOWEST FLOOR.
LEAVE MOBILE HOMES AND VEHICLES FOR REINFORCED SHELTER. STAY AWAY
FROM WINDOWS.

&&

LAT...LON 2562 8029 2561 8030 2560 8030 2559 8031
      2561 8035 2565 8035 2570 8032 2572 8030
      2567 8026
TIME...MOT...LOC 0054Z 190DEG 3KT 2561 8031

$$

60
1 follow-up statement
755 
WWUS52 KMFL 310118
SVSMFL

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
918 PM EDT SUN OCT 30 2011

FLC086-310127-
/O.CAN.KMFL.TO.W.0012.000000T0000Z-111031T0145Z/
MIAMI-DADE FL-
918 PM EDT SUN OCT 30 2011

...THE TORNADO WARNING FOR EAST CENTRAL MIAMI-DADE COUNTY IS
CANCELLED...

NATIONAL WEATHER SERVICE RADAR INDICATED THAT THE POSSIBLE TORNADO 
HAS DISSIPATED. THUS THE TORNADO WARNING HAS BEEN CANCELLED.

LAT...LON 2562 8029 2561 8030 2560 8030 2559 8031
      2561 8035 2565 8035 2570 8032 2572 8030
      2567 8026
TIME...MOT...LOC 0117Z 190DEG 3KT 2563 8031

$$

60

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 30, 8:02 PM EDTSpecial Marine WarningMFL43 min
Oct 30, 8:13 PM EDTSpecial Weather StatementMFLMiami-Dade47 min
Oct 30, 8:14 PM EDTFlash Flood WarningMFLMiami-Dade3 hr
Oct 30, 8:26 PM EDTTornado WarningMFLMiami-Dade34 min
Oct 30, 8:44 PM EDTSpecial Marine WarningMFL46 min
Oct 30, 9:31 PM EDTSpecial Marine WarningMFL44 min
Oct 30, 10:12 PM EDTAreal Flood AdvisoryMFLBroward2 hr
Oct 30, 10:31 PM EDTFlash Flood WarningMFLMiami-Dade6 hr
Oct 31, 12:07 AM EDTAreal Flood AdvisoryMFLBroward4 hr
Oct 31, 1:27 AM EDTFlash Flood WarningMFLBroward3 hr
Oct 31, 1:47 AM EDTSpecial Marine WarningMFL58 min
Oct 31, 2:26 AM EDTFlash Flood WarningMFLBroward3 hr
Oct 31, 4:21 AM EDTFlash Flood WarningMFLMiami-Dade5 hr
Oct 31, 4:29 AM EDTRip Current StatementMFLBroward, Miami-Dade, Palm Beach4 days
Oct 31, 4:31 AM EDTFlash Flood WarningMFLBroward5 hr
Oct 31, 8:32 AM EDTSpecial Marine WarningMFL28 min
Oct 31, 8:59 AM EDTAreal Flood WarningMFLMiami-Dade3 hr
Oct 31, 9:06 AM EDTAreal Flood WarningMFLBroward3 hr
Oct 31, 12:01 PM EDTFlash Flood WarningMFLMiami-Dade5 hr
Oct 31, 12:16 PM EDTFlash Flood WarningMFLBroward6 hr
Oct 31, 1:35 PM EDTSpecial Weather StatementMFLBroward40 min
Oct 31, 2:08 PM EDTSpecial Weather StatementMFLBroward52 min
Oct 31, 2:54 PM EDTAreal Flood AdvisoryMFLBroward111 min
Oct 31, 4:55 PM EDTFlash Flood WarningMFLMiami-Dade4 hr
Oct 31, 5:50 PM EDTAreal Flood WarningMFLBroward18 hr
Oct 31, 6:48 PM EDTAreal Flood WarningMFLMiami-Dade18 hr

Nearby

Tornado Warnings in Florida, 2011Every tornado warning in 2011Tornadoes in 2011

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.