Alert archive / Florida / Frost Advisories in 2012

Frost Advisory 3, NWS Melbourne, FL

December 22, 20124 counties in Florida

NWS Melbourne, FL issued this frost advisory at Dec 22, 2012, 1:26 PM EST for 4 counties in Florida. It took effect at Dec 23, 2012, 2:00 AM EST. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Dec 22, 2012, 1:26 PM EST (18:26 UTC)
In effect from
Dec 23, 2012, 2:00 AM EST
Expired
Dec 23, 2012, 8:00 AM EST
In force
6 hr
Issued by
NWS Melbourne, FL

Counties Orange County, FL, Osceola County, FL, Seminole County, FL, Volusia County, FL

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 6.4 hours before the alert went out and 71 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, Cape Canaveral, FL at 12:00Z on 2012-12-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Cape Canaveral, FL at 12:00Z on 2012-12-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -45 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2674 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-45 m²/s²
0-3 km storm-relative helicity
-44 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

690 
WWUS72 KMLB 221826
NPWMLB

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MELBOURNE FL
126 PM EST SAT DEC 22 2012

FLZ041-044-058-144-231300-
/O.UPG.KMLB.FZ.A.0004.121223T0800Z-121223T1300Z/
/O.NEW.KMLB.FZ.W.0007.121223T0700Z-121223T1300Z/
INLAND VOLUSIA-NORTHERN LAKE-OKEECHOBEE-SOUTHERN LAKE-
INCLUDING THE CITIES OF...DE LAND...LEESBURG...OKEECHOBEE...
CLERMONT
126 PM EST SAT DEC 22 2012

...FREEZE WARNING IN EFFECT FROM 2 AM TO 8 AM EST SUNDAY...

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A FREEZE
WARNING...WHICH IS IN EFFECT FROM 2 AM TO 8 AM EST SUNDAY. THE
FREEZE WATCH IS NO LONGER IN EFFECT. 

* TEMPERATURE...COLD AIR WILL PRODUCE TEMPERATURES AROUND FREEZING
  OVER LOW SPOTS AND TRADITIONALLY COLDER LOCATIONS EARLY SUNDAY.
  LIGHT TO CALM WINDS AND MOSTLY CLEAR SKIES WILL CREATE A GREATER
  POTENTIAL FOR WIDESPREAD FREEZING TEMPERATURES FROM LATE
  TONIGHT THROUGH EARLY SUNDAY MORNING.

* IMPACTS...COLD SENSITIVE PLANTS SHOULD BE COVERED OR BROUGHT
  INDOORS IN ADVANCE OF FREEZING TEMPERATURES. PETS SHOULD ALSO BE
  BROUGHT INDOORS. WIDESPREAD FROST IS ALSO LIKELY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR
HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER
SENSITIVE VEGETATION.

&&

$$

FLZ045>047-053-054-059-064-141-147-231300-
/O.NEW.KMLB.FR.Y.0003.121223T0700Z-121223T1300Z/
ORANGE-SEMINOLE-SOUTHERN BREVARD-OSCEOLA-INDIAN RIVER-ST. LUCIE-
MARTIN-COASTAL VOLUSIA-NORTHERN BREVARD-
INCLUDING THE CITIES OF...ORLANDO...SANFORD...MELBOURNE...
PALM BAY...KISSIMMEE...ST CLOUD...VERO BEACH...FORT PIERCE...
HOBE SOUND...DAYTONA BEACH...TITUSVILLE
126 PM EST SAT DEC 22 2012

...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM EST SUNDAY...

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A FROST
ADVISORY...WHICH IS IN EFFECT FROM 2 AM TO 8 AM EST SUNDAY. 

* TEMPERATURE...TEMPERATURE READINGS IN THE LOWER TO MID 30S ALONG
  WITH MOSTLY CLEAR SKIES AND LIGHT TO CALM WIND WILL LEAD TO
  AREAS OF FROST LATE TONIGHT AND SUNDAY MORNING. 

* IMPACTS...SENSITIVE PLANTS MAY NEED TO BE COVERED OR IF POSSIBLE
  BROUGHT INDOORS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FROST ADVISORY MEANS THAT FROST IS LIKELY. SENSITIVE OUTDOOR
PLANTS MAY BE KILLED OR DAMAGED IF LEFT UNCOVERED.

&&

$$

JP

The office that day

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

IssuedProductOfficeCountiesLasted
Dec 22, 3:51 AM ESTFreeze WatchMLBLake, Okeechobee, Volusia10 hr
Dec 22, 1:26 PM ESTFreeze WarningMLBLake, Okeechobee, Volusia19 hr

Nearby

Frost Advisories in Florida, 2012Every frost advisory 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.