Florida, 2007

Frost and Freeze in Florida, December 17 to 18, 2007

December 17 to 18, 2007 · NWS TBW · 5 events in 3 counties and zones

Cold and dry high pressure built into the area behind a cold front, bringing freezing temperatures to the northern counties each morning. Winds of around 10 mph the morning of Dec.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
5

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS TBW wrote it up.

Cold and dry high pressure built into the area behind a cold front, bringing freezing temperatures to the northern counties each morning. Winds of around 10 mph the morning of Dec. 17th kept wind chill values in the upper 20s to lower 30s from Desoto and Highlands counties northward, but helped to prevent a widespread freeze or frost from developing across all but the normally colder locations across the northern area.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Tampa Bay, FL wrote its last area forecast discussion before the first event at Dec 17, 3:56 AM EST, 1 hour 4 minutes earlier.

Area forecast discussion, Dec 17, 3:56 AM EST, 1 hour 4 minutes before
AREA FORECAST DISCUSSION...CORRECTED
NATIONAL WEATHER SERVICE TAMPA BAY RUSKIN FL
356 AM EST MON DEC 17 2007

CORRECTED WATCHES/WARNINGS/ADVISORIES PORTION FOR CANCELLATION OF
WIND CHILL ADV FOR CHARLOTTE AND LEE COUNTIES.

.SHORT TERM (TODAY - WEDNESDAY)...MORNING ANALYSIS SHOWS HIGH
PRESSURE BUILDING INTO THE AREA FROM THE NORTH AND WEST...ALONG WITH
VIGOROUS CAA AND BREEZY CONDITIONS. WILL CONTINUE EXISTING FREEZE
WARNING AND WIND CHILL ADV AS TEMPS WILL CONTINUE TO DROP AND
WINDS WILL STAY UP THROUGH SUNRISE. TEMPS AROUND SUNRISE WILL
BOTTOM OUT AROUND FREEZING ACROSS INLAND PORTIONS OF OUR NATURE
COAST COUNTIES...AND AROUND 40 TAMPA BAY METRO AREA...SO DRESS
WARMLY FOR THE BUS STOP THIS MORNING

THE AFOREMENTIONED HIGH CENTER WILL SLIDE EAST TODAY REACHING THE SE
U.S. COAST THIS EVENING. FORECAST SOUNDINGS SHOW A VERY COOL...
STABLE...AND DRY AIRMASS OVER OUR AREA TODAY...THUS CLEAR SKIES
AND COOL TEMPS FOR DAYTIME HOURS TODAY. HIGHS TODAY FROM THE UPPER
50S NORTH TO MID 60S SOUTH. AT FIRST GLANCE...TEMPS TONIGHT LOOK LIKE
THEY WILL STAY ABOVE FREEZING GIVEN THE HIGH CENTER STAYING TO OUR
NORTH WITH A PRES GRAD PERSISTING OVER THE PENINSULA. HOWEVER
GIVEN THE COOL AND STABLE NATURE OF THE AIRMASS...THINK THE ATMOS
WILL DECOUPLE AT SOME POINT TONIGHT AND ALLOW TEMPS TO DROP...ESP
ACROSS THE NATURE COAST WHERE LOWS TONIGHT EXPECTED TO DROP TO
FREEZING FOR A COUPLE HOURS. AS SUCH...WILL UPGRADE CURRENT FREEZE
WATCH FOR EARLY TUESDAY MORNING TO A WARNING.

THE HIGH WILL MOVE OFF THE SE COAST ON TUESDAY...ALLOWING EASTERLY
FLOW TO BRING A GRADUAL WARM-UP TO THE AREA. PLENTY OF SUNSHINE WITH
TEMPS RECOVERING AND HIGHS AROUND 70.

TUESDAY NIGHT A QUICK MOVING SHORT WAVE WILL PASS BY WELL TO OUR
NORTH. HOWEVER...BRISK WEST FLOW ALOFT WILL TRANSPORT SOME MID AND
HIGH CLOUDS ACROSS THE AREA. THAT COMBINED WITH EASTERLY LOW LEVEL
FLOW WILL RESULT IN WARMER READINGS TUESDAY NIGHT WITH LOWS RANGING
FROM AROUND 40 NORTH TO AROUND 50 SOUTH AND ALONG THE COAST.

LITTLE CHANGE ON WEDNESDAY WITH RIDGE AXIS TO OUR NORTH...FAIRLY DRY
AIRMASS AND WESTERLY FLOW ALOFT...ALL RESULTING IN PARTLY CLOUDY
SKIES AND WARMER WITH HIGHS FROM THE LOW 70S NORTH TO UPR 70S SOUTH.

&&

.LONG TERM (WEDNESDAY NIGHT - SUNDAY)...LATEST MODEL DATA DO NOT
INSPIRE MUCH CONFIDENCE IN HAVING SIGNIFICANT RAIN FROM THE WEAK
FRONTAL BOUNDARY RACING NORTH OF THE STATE IN THE THURSDAY EARLY
EVENING TO FRIDAY MORNING TIME FRAME. ISOLATED/20 POPS WILL BE
INTRODUCED FOR THE AFOREMENTIONED TIME PERIOD AND KEEP IT WITH
SLIGHT CHANCES OF RAIN AT BEST OVER THE NATURE COAST ONLY.

A SECOND...APPARENTLY STRONGER FRONT...IS DEPICTED BY GFS ARRIVING
OVER NORTHERN FLORIDA ON SATURDAY EVENING AND INTO SUNDAY EARLY
MORNING. WITH BASICALLY A WEEK STILL TO GO...WILL REFRAIN FROM
INTRODUCING RAIN CHANCES HIGHER THAN 20 PERCENT FOR SATURDAY EVENING
AND SUNDAY EARLY MORNING AND WAIT FOR BETTER PERSISTENCE FROM MODEL
DATA.

A WEAK WARMING TREND WILL CONTINUE TO TAKE PLACE TROUGH THE EXTENDED
PERIOD BUT ONLY ONE OR TWO DEGREES WARMER THAN CURRENT GRIDS VALUES.

&&

.AVIATION...MAINLY VFR CONDITIONS EXPECTED THROUGH THE NEXT 24 HOURS.

&&

.MARINE...SCA CONDITIONS CONTINUING ATTM...AND EXPECTING TO CONTINUE
THROUGH MID DAY TODAY. GOOD AGREEMENT IN GUIDANCE WHICH INDICATES
SCA CONDITIONS CONTINUING THROUGH MID DAY THEN QUICK IMPROVEMENT AS
THE AFTERNOON PROGRESSES...THANKS TO OFFSHORE FLOW. SHOULD BE ABLE
TO LET SCA EXPIRE AT 21Z AND HIGH SURF EXPIRE AT 18Z. MAY NEED TO
CARRY A CAUTION HEADLINE OFFSHORE TONIGHT...THEN CONDITIONS WILL
DROP BELOW HEADLINE CRITERIA ON TUESDAY WITH WINDS REMAINING AOB
15KT THROUGH THE MIDDLE OF THE WEEK.

&&

.FIRE WEATHER...DRY AIR MASS OVER THE REGION...ALONG WITH BREEZY
CONDITIONS...WILL WARRANT UPGRADING THE FIRE WEATHER WATCH TO A
WARNING. WITH NE FLOW...WILL INCLUDE PINELLAS COUNTY AS WELL. MUCH
OF THE CWA WILL SEE 4+ HOURS OF RH BELOW 35% TODAY. WITH EASTERLY
FLOW INCREASING ON TUESDAY...RH VALUES SHOULD REMAIN ABOVE CRITICAL
VALUES.

&&

.PRELIMINARY POINT TEMPS/POPS...
TPA  60  41  69  53 /   0   0   0   5
FMY  64  44  74  55 /   0   0   0   5
GIF  60  40  69  51 /   0   0   0   5
SRQ  61  41  70  52 /   0   0   0   5
BKV  58  30  68  43 /   0   0   0   5
SPG  60  48  69  57 /   0   0   0   5

&&

.TBW WATCHES/WARNINGS/ADVISORIES...
FL...RED FLAG WARNING FROM 11 AM THIS MORNING TO 6 PM EST THIS
     AFTERNOON FOR CHARLOTTE-CITRUS-DE SOTO-HARDEE-HERNANDO-
     HIGHLANDS-HILLSBOROUGH-LEE-LEVY-MANATEE-PASCO-PINELLAS-POLK-
     SARASOTA-SUMTER.

     FREEZE WARNING UNTIL 9 AM EST THIS MORNING FOR CITRUS-HERNANDO-
     LEVY-SUMTER.

     FREEZE WARNING FROM 1 AM TO 8 AM EST TUESDAY FOR CITRUS-HERNANDO-
     LEVY-SUMTER.

     WIND CHILL ADVISORY UNTIL 8 AM EST THIS MORNING FOR
     CITRUS-DE SOTO-HARDEE-HERNANDO-HIGHLANDS-HILLSBOROUGH-
     LEVY-MANATEE-PASCO-PINELLAS-POLK-SARASOTA-SUMTER.

     HIGH SURF ADVISORY UNTIL 1 PM EST THIS AFTERNOON FOR
     CHARLOTTE-HILLSBOROUGH-LEE-MANATEE-PASCO-PINELLAS-SARASOTA.

GULF WATERS...SMALL CRAFT ADVISORY UNTIL 4 PM EST THIS AFTERNOON
     FOR BONITA BEACH TO ENGLEWOOD OUT 20 NM-BONITA BEACH TO
     ENGLEWOOD OUT 20 TO 60 NM-ENGLEWOOD TO TARPON SPRINGS OUT 20
     NM-ENGLEWOOD TO TARPON SPRINGS OUT 20 TO 60 NM-TAMPA BAY
     WATERS-TARPON SPRINGS TO SUWANNEE RIVER OUT 20 NM-TARPON
     SPRINGS TO SUWANNEE RIVER OUT 20 TO 60 NM.

&&

SHORT TERM/MARINE/FIRE...NP
LONG TERM/AVIATION...AR
Hazardous weather outlook, Dec 16, 5:16 AM EST, 23 hours 44 minutes before
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Event by event

5 frost/freeze. Local standard time, as filed.

Frost/Freeze, Levy

When
December 17, 5:00 AM EST to 8:00 AM EST
Where
Levy forecast zone
Reported by
COOP Observer

Freezing temperatures were in place across the county for a few hours with a low of 30 at the COOP site 6 miles southeast of Chiefland.

Frost/Freeze, Hernando

When
December 17, 5:00 AM EST to 8:00 AM EST
Where
Hernando forecast zone
Reported by
COOP Observer

Freezing temperatures were in place across the county for a few hours with a low of 31 at the COOP site 4 miles north of Brooksville.

Frost/Freeze, Citrus

When
December 18, 12:00 AM EST to 8:00 AM EST
Where
Citrus forecast zone
Reported by
Mesonet

Freezing temperatures were in place across the county for several hours with a low of 27 at a home weather station 4 miles northeast of Beverly Hills.

Frost/Freeze, Levy

When
December 18, 5:00 AM EST to 8:00 AM EST
Where
Levy forecast zone
Reported by
COOP Observer

Freezing temperatures were in place across the county for a few hours with a low of 28 at the COOP site 6 miles southeast of Chiefland.

Frost/Freeze, Hernando

When
December 18, 5:00 AM EST to 8:00 AM EST
Where
Hernando forecast zone
Reported by
ASOS

Freezing temperatures were in place across the county for a few hours with a low of 31 at the Brooksville ASOS (KBKV) and the COOP site 4 miles north of Brooksville.

What these are

Frost/Freeze
Frost or temperatures at or below freezing during the growing season, usually filed for crop damage.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Florida in 2007Every state in 2007This day in weather historyWarnings in Florida, December 2007

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-30. Each event’s entry at NCEI: 66417, 66418, 66427, 66420, 66428.