Alert archive / Florida / Frost Advisories in 2009

Frost Advisory 1, NWS Miami, FL

January 14, 2009Glades County, Florida

NWS Miami, FL issued this frost advisory at Jan 14, 2009, 9:03 PM EST for Glades County, Florida. It took effect at Jan 15, 2009, 4:00 AM EST. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Jan 14, 2009, 9:03 PM EST (02:03 UTC)
In effect from
Jan 15, 2009, 4:00 AM EST
Expired
Jan 15, 2009, 7:40 AM EST
In force
4 hr
Issued by
NWS Miami, FL

County Glades County, FL

The radar

The Melbourne radar (KMLB), 139 km from the middle of the area, began a volume at 02:05 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 00:00Z, 2.1 hours before the alert went out and 155 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 2009-01-15Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Miami, FL at 00:00Z on 2009-01-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 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
1196 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this frost advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this frost advisory went out at Jan 14, 6:35 PM EST, 2 hours 28 minutes earlier.

Area forecast discussion, Jan 14, 6:35 PM EST, 2 hours 28 minutes before
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Hazardous weather outlook, Jan 14, 5:43 AM EST, 15 hours 20 minutes before
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA
NATIONAL WEATHER SERVICE MIAMI FL
543 AM EST WED JAN 14 2009

FLZ063-066>075-168-172>174-150145-
GLADES-HENDRY-INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER-
INLAND COLLIER-INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE-
METRO MIAMI DADE-MAINLAND MONROE-COASTAL PALM BEACH-
COASTAL BROWARD-COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE-
543 AM EST WED JAN 14 2009

...COLD WIND CHILL VALUES EXPECTED TONIGHT...
...HAZARDOUS SEAS WILL PERSIST IN THE GULF STREAM...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA.

.DAY ONE...TODAY AND TONIGHT

TEMPERATURES: A COLD AIRMASS WILL CONTINUE TO SPREAD SOUTHWARD
OVER THE AREA IN THE WAKE OF A STRONG COLD FRONTAL PASSAGE ON
TUESDAY EVENING. MINIMUM TEMPERATURES WILL RANGE FROM THE MID 30S
NORTHWEST INTERIOR TO THE MID 50S ALONG THE IMMEDIATE SOUTHEAST
COAST. THESE TEMPERATURES, WHEN COMBINED WITH A NORTH WIND OF 5
MPH OR LESS WILL RESULT IN APPARENT TEMPERATURES OF 30 TO 35
DEGREES ACROSS GLADES, HENDRY, AND NORTHERN INLAND COLLIER
COUNTIES, WHERE PATCHY FROST IS ALSO POSSIBLE IN SHELTERED
LOCATIONS. APPARENT TEMPERATURES OF 35 TO 45 DEGREES ARE
ANTICIPATED ELSEWHERE, WITH THE EXCEPTION OF COASTAL AND METRO
BROWARD AND MIAMI-DADE COUNTIES.

WAVES: PERSISTENT NORTHERLY WINDS OVER THE ATLANTIC WILL LEAD TO A
CONTINUATION OF HAZARDOUS SEAS IN THE GULF STREAM TODAY, AND A
SMALL CRAFT ADVISORY IS IN EFFECT THROUGH MID-AFTERNOON.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

A STRONGER SECONDARY COLD FRONT STILL APPEARS ON SCHEDULE TO MOVE
ACROSS THE AREA ON THURSDAY NIGHT, WITH NORTHERLY WINDS
INCREASING TO 20 KNOTS OR HIGHER OVER ALL OF THE LOCAL WATERS.
THIS WILL LEAD TO A CONTINUATION OF HAZARDOUS MARINE CONDITIONS
THROUGH AT LEAST THE SECOND HALF OF THE UPCOMING WEEKEND.

WIND CHILL VALUES WILL REMAIN LOW THROUGH THE FORECAST PERIOD,
WITH READING OF 35 TO 40 DEGREES COMMON ACROSS THE NORTHWEST
INTERIOR, AND 40 TO 45 DEGREES ELSEWHERE WITH THE EXCEPTION OF THE
IMMEDIATE SOUTHEAST COAST. THE COLDEST MORNINGS WILL LIKELY BE
FRIDAY AND SATURDAY, WHEN WIND CHILLS IN THE MID TO UPPER 20S WILL
BE POSSIBLE ACROSS GLADES, HENDRY, AND NORTHERN INLAND COLLIER
COUNTIES.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED.

FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI
WEBSITE AT WWW.WEATHER.GOV/MIAMI.

70/DD

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 15, 6:09 AM ESTFire Weather WatchMFLCollier24 hr
Jan 15, 6:09 AM ESTRed Flag WarningMFLCollier7 hr

Nearby

Frost Advisories in Florida, 2009Every frost advisory 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.