Alert archive / Florida / Special Weather Statements in 2012

Special Weather Statement, NWS Miami, FL

April 6, 2012Collier County, Florida

NWS Miami, FL issued this special weather statement at Apr 6, 2012, 11:21 AM EDT for Collier County, Florida. It was in force for 24 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
Apr 6, 2012, 11:21 AM EDT (15:21 UTC)
Expired
Apr 6, 2012, 11:45 AM EDT
In force
24 min
Issued by
NWS Miami, FL

County Collier County, FL

The radar

The Miami radar (KAMX), 83 km from the middle of the area, began a volume at 15:25 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, 3.4 hours before the alert went out and 80 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 2012-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2930 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 2012-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 167 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
2930 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
478 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
167 m²/s²
0-3 km storm-relative helicity
257 m²/s²
Significant tornado parameter
3.7
Supercell composite
16.2

Open this sounding in Storm Lab

The text

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

918 
WWUS82 KMFL 061521
SPSMFL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
1121 AM EDT FRI APR 6 2012

FLZ070-071-061545-
INLAND BROWARD COUNTY FL INLAND COLLIER COUNTY FL 
1121 AM EDT FRI APR 6 2012

THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A

* SIGNIFICANT WEATHER ADVISORY FOR...
  EXTREME WEST CENTRAL BROWARD COUNTY 
  EAST CENTRAL COLLIER COUNTY 

* UNTIL 1145 AM EDT

* AT 1115 AM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  STRONG THUNDERSTORM 8 MILES NORTHWEST OF BIG CYPRESS NATIONAL
  PRESERVE...AND MOVING EAST AT 25 MPH.

* THE STORM WILL AFFECT...
  BIG CYPRESS NATIONAL PRESERVE...
  MILE MARKER 60 ON ALLIGATOR ALLEY...
  AND SURROUNDING COMMUNITIES.

FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE
WINDS CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE
STORM PASSES.

LAT...LON 2622 8088 2599 8087 2601 8124 2618 8122
TIME...MOT...LOC 1521Z 275DEG 22KT 2610 8113

$$

AK

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 6, 9:09 AM EDTSpecial Marine WarningMFL51 min
Apr 6, 9:29 AM EDTSpecial Marine WarningMFL46 min
Apr 6, 9:48 AM EDTSpecial Weather StatementMFLCollier42 min
Apr 6, 9:53 AM EDTSevere Thunderstorm WarningMFLCollier, Hendry37 min
Apr 6, 10:12 AM EDTSpecial Marine WarningMFL33 min
Apr 6, 10:13 AM EDTSpecial Weather StatementMFLCollier32 min
Apr 6, 10:50 AM EDTSpecial Marine WarningMFL55 min
Apr 6, 11:18 AM EDTSpecial Marine WarningMFL57 min
Apr 6, 11:39 AM EDTSpecial Weather StatementMFLBroward36 min
Apr 6, 11:46 AM EDTSevere Thunderstorm WarningMFLBroward, Palm Beach12 min
Apr 6, 11:51 AM EDTSpecial Marine WarningMFL43 min
Apr 6, 1:00 PM EDTSpecial Weather StatementMFLBroward30 min
Apr 6, 1:29 PM EDTSpecial Weather StatementMFLBroward31 min
Apr 6, 1:39 PM EDTSevere Thunderstorm WarningMFLBroward, Miami-Dade17 min
Apr 6, 1:42 PM EDTSpecial Marine WarningMFL33 min
Apr 6, 1:58 PM EDTSpecial Marine WarningMFL62 min
Apr 6, 2:56 PM EDTSpecial Marine WarningMFL64 min
Apr 6, 3:36 PM EDTSpecial Marine WarningMFL39 min
Apr 6, 4:00 PM EDTSpecial Marine WarningMFL45 min
Apr 6, 4:13 PM EDTSmall Craft AdvisoryMFL48 hr

Nearby

Special Weather Statements in Florida, 2012Every special weather statement in 2012

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.