Alert archive / Georgia / Wind Chill Advisories in 2018

Wind Chill Advisory 2, NWS Jacksonville, FL

January 2, 201812 counties in Georgia; 8 counties in Florida

NWS Jacksonville, FL issued this wind chill advisory at Jan 2, 2018, 3:16 PM EST for 12 counties in Georgia; 8 counties in Florida. It took effect at Jan 3, 2018, 1:00 AM EST. It was in force for 34 hr.

The area

The counties it named.

The facts

Issued
Jan 2, 2018, 3:16 PM EST (20:16 UTC)
In effect from
Jan 3, 2018, 1:00 AM EST
Expired
Jan 4, 2018, 11:00 AM EST
In force
34 hr
Issued by
NWS Jacksonville, FL

Counties Baker County, FL, Bradford County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Nassau County, FL, Suwannee County, FL, Union County, FL, Appling County, GA, Atkinson County, GA, Bacon County, GA, Brantley County, GA, Camden County, GA, Clinch County, GA, Coffee County, GA, Echols County, GA, Glynn County, GA, Jeff Davis County, GA, Pierce County, GA, Wayne County, GA

The radar

The Jacksonville radar (KJAX), 66 km from the middle of the area, began a volume at 20:20 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

Jacksonville, FL (KJAX), launched 12:00Z, 8.3 hours before the alert went out and 65 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, Jacksonville, FL at 12:00Z on 2018-01-02Temperature 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, Jacksonville, FL at 12:00Z on 2018-01-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 134 square meters per square second.1939587897117Sfc1 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
948 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
134 m²/s²
0-3 km storm-relative helicity
349 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

163 
WWUS42 KJAX 022016
WSWJAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Jacksonville FL
316 PM EST Tue Jan 2 2018


FLZ020>024-030-035-GAZ132>136-149>154-162>166-031000-
/O.UPG.KJAX.WS.A.0001.180103T0700Z-180103T2200Z/
/O.NEW.KJAX.WS.W.0001.180103T0900Z-180103T2200Z/
/O.NEW.KJAX.WC.Y.0002.180103T0600Z-180104T1400Z/
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Union-Gilchrist-
Coffee-Jeff Davis-Bacon-Appling-Wayne-Atkinson-Ware-Pierce-
Brantley-Inland Glynn-Coastal Glynn-Echols-Clinch-Charlton-
Inland Camden-Coastal Camden-
Including the cities of Jasper, Jennings, West Lake, Belmont, 
White Springs, Houston, Live Oak, McAlpin, Newburn, 
Suwannee Springs, Columbia, Lake City, Oleno State Park, Lulu, 
Watertown, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, 
Bryceville, Lake Butler, Trenton, Douglas, Hazlehurst, Alma, 
New Lacy, Baxley, Pine Grove, Plant Hatch, Doctortown, Gardi, 
Jesup, Axson, Pearson, Willacoochee, Needham, Waycross, 
Blackshear, Atkinson, Hickox, Hortense, Nahunta, Raybon, 
Waynesville, Hoboken, Thalmann, Jekyll Island, Glynn Haven, 
Sea Island, St. Simons, Country Club Estate, Dock Junction, 
Needmore, Statenville, Homerville, Folkston, St. George, Winokur,
Homeland, Race Pond, Stephen Foster State Park, Colesburg, 
Tarboro, Waverly, Woodbine, Dover Bluff, Kingsland, and Dungeness
316 PM EST Tue Jan 2 2018

...WIND CHILL ADVISORY IN EFFECT FROM 1 AM WEDNESDAY TO 9 AM EST
THURSDAY...
...WINTER STORM WARNING IN EFFECT FROM 4 AM TO 5 PM EST
WEDNESDAY...

* WHAT...Heavy mixed precipitation expected. Very cold wind 
  chills expected. Power outages and tree damage are likely due 
  to the ice. Travel will be dangerous and nearly impossible, 
  including during the morning commute on Wednesday. Total snow 
  accumulations of up to 3 inches and ice accumulations of one 
  tenth to one half of an inch are expected. Expect wind chills 
  to range from 30 above zero to 10 above zero.

* WHERE...Portions of northeast Florida, northern Florida and 
  southeast Georgia.

* WHEN...For the Winter Storm Warning, 4 AM Wednesday to 5 PM 
  Wednesday. The heaviest snowfall rates and greatest ice 
  accumulation will occur between 7 AM and 1 PM Wednesday. For 
  the Wind Chill Advisory, 1 AM Wednesday and 9 AM Thursday. The 
  coldest wind chills will occur around 6 AM Thursday.

* ADDITIONAL DETAILS...Look for significant reductions in 
  visibility at times. The cold wind chills will cause frostbite 
  in as little as 30 minutes to exposed skin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice are expected. This will make travel very hazardous or
impossible. The latest road conditions for the state you are
calling from can be obtained by calling 5 1 1.

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ025-031-032-036-031000-
/O.NEW.KJAX.WC.Y.0002.180103T0600Z-180104T1400Z/
/O.NEW.KJAX.WW.Y.0001.180103T0900Z-180103T2200Z/
Inland Duval-Bradford-Clay-Alachua-
Including the cities of Normandy, Ortega, Riverside, San Marco, 
Starke, New River, Doctors Inlet, Lakeside, Bellair, Middleburg, 
Orange Park, Gainesville, Gainesville Airport, and Newnans Lake
316 PM EST Tue Jan 2 2018

...WIND CHILL ADVISORY IN EFFECT FROM 1 AM WEDNESDAY TO 9 AM EST
THURSDAY...
...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 5 PM EST
WEDNESDAY...

* WHAT...Very cold wind chills expected. A brief period of
  freezing rain expected. The ice could result in slippery
  conditions on sidewalks, roads and bridges, including during the
  morning commute on Wednesday. Expect wind chills to range from
  30 above zero to 15 above zero. 

* WHERE...Inland Duval, Bradford, Clay and Alachua County.

* WHEN...For the Wind Chill Advisory, 1 AM Wednesday and 9 AM 
  Thursday. The coldest wind chills will occur around 7 AM 
  Thursday. For the Winter Weather Advisory, 4 AM Wednesday to 5 
  PM Wednesday.

* ADDITIONAL DETAILS...The cold wind chills will cause frostbite
  in as little as 30 minutes to exposed skin. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

A Winter Weather Advisory means that periods of freezing rain
will cause travel difficulties. Be prepared for slippery roads.
Slow down and use caution while driving. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

&&

$$

FLZ124-031000-
/O.NEW.KJAX.WW.Y.0001.180103T0900Z-180103T2200Z/
Coastal Nassau-
Including the cities of Amelia City, Fernandina Beach, and Yulee
316 PM EST Tue Jan 2 2018

...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 5 PM EST
WEDNESDAY...

* WHAT...A brief period of freezing rain possible. The ice will
  result in slippery conditions on sidewalks, roads and bridges, 
  including during the morning commute on Wednesday. Total ice 
  accumulations of a light glaze are expected.

* WHERE...Coastal Nassau County.

* WHEN...4 AM Wednesday to 5 PM Wednesday.

* ADDITIONAL DETAILS...Greatest threat is to elevated road
  surfaces and bridges.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of freezing rain
will cause travel difficulties. Be prepared for slippery roads.
Slow down and use caution while driving. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

&&

$$
5 follow-up statements
247 
WWUS42 KJAX 030808
WSWJAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Jacksonville FL
308 AM EST Wed Jan 3 2018

FLZ020>024-030-035-GAZ132>136-149>154-162>166-032200-
/O.EXT.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
/O.CON.KJAX.WS.W.0001.180103T0900Z-180103T2200Z/
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Union-Gilchrist-
Coffee-Jeff Davis-Bacon-Appling-Wayne-Atkinson-Ware-Pierce-
Brantley-Inland Glynn-Coastal Glynn-Echols-Clinch-Charlton-
Inland Camden-Coastal Camden-
Including the cities of Jasper, Jennings, West Lake, Belmont, 
White Springs, Houston, Live Oak, McAlpin, Newburn, 
Suwannee Springs, Columbia, Lake City, Oleno State Park, Lulu, 
Watertown, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, 
Bryceville, Lake Butler, Trenton, Douglas, Hazlehurst, Alma, 
New Lacy, Baxley, Pine Grove, Plant Hatch, Doctortown, Gardi, 
Jesup, Axson, Pearson, Willacoochee, Needham, Waycross, 
Blackshear, Atkinson, Hickox, Hortense, Nahunta, Raybon, 
Waynesville, Hoboken, Thalmann, Jekyll Island, Glynn Haven, 
Sea Island, St. Simons, Country Club Estate, Dock Junction, 
Needmore, Statenville, Homerville, Folkston, St. George, Winokur,
Homeland, Race Pond, Stephen Foster State Park, Colesburg, 
Tarboro, Waverly, Woodbine, Dover Bluff, Kingsland, and Dungeness
308 AM EST Wed Jan 3 2018

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM EST THURSDAY...
...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...

* WHAT...Heavy mixed precipitation expected. Very cold wind chills
  expected. Power outages and tree damage are likely due to the
  ice. Travel will be dangerous and nearly impossible, including
  during the morning commute. Total snow accumulations of up to 3
  inches and ice accumulations of one tenth to one half of an inch
  are expected. Expect wind chills to range from near 10 degrees
  through the teens. The lowest wind chills will be tonight.

* WHERE...Portions of inland northern Florida and all of southeast 
  Georgia.

* WHEN...For the Winter Storm Warning, 4 AM to 5 PM. The 
  heaviest snowfall rates and greatest ice accumulation will 
  occur between 7 AM this morning and 1 PM this afternoon. For 
  the Wind Chill Advisory, until 11 AM Thursday. The coldest 
  wind chills will occur around 7 AM Thursday.

* ADDITIONAL DETAILS...Look for significant reductions in
  visibility at times. The cold wind chills may cause frostbite 
  in as little as 30 minutes to exposed skin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice are expected. This will make travel very hazardous or
impossible. The latest road conditions for the state you are
calling from can be obtained by calling 5 1 1.

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ124-032200-
/O.EXB.KJAX.WC.Y.0002.180104T0000Z-180104T1600Z/
/O.CON.KJAX.WW.Y.0001.180103T0900Z-180103T2200Z/
Coastal Nassau-
Including the cities of Amelia City, Fernandina Beach, and Yulee
308 AM EST Wed Jan 3 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...
...WIND CHILL ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 11 AM
EST THURSDAY...

* WHAT...Freezing rain possible. Very cold wind chills expected.
  The ice will result in very slippery conditions on sidewalks,
  roads and bridges, including during the morning commute. Total
  ice accumulations of a light glaze are possible. Expect wind
  chills to range from 15 to 25 degrees.

* WHERE...Coastal Nassau County.

* WHEN...For the Winter Weather Advisory, 4 AM to 5 PM. For the 
  Wind Chill Advisory, 7 PM this evening and 11 AM Thursday. The 
  coldest wind chills will occur around 7 AM Thursday.

* ADDITIONAL DETAILS...The cold wind chills may cause frostbite 
  in as little as 30 minutes to exposed skin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of freezing rain
will cause travel difficulties. Be prepared for slippery roads.
Slow down and use caution while driving. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ033-037-038-040-125-032200-
/O.EXB.KJAX.WC.Y.0002.180104T0000Z-180104T1600Z/
St. Johns-Putnam-Flagler-Marion-Coastal Duval-
Including the cities of Ponte Vedra Beach, Durbin, Palm Valley, 
Fruit Cove, Switzerland, Anastasia, Bakersville, Bostwick, 
Carraway, Palatka, Palm Coast, Anthony, Burbank, Ocala, 
Ocala Airport, Weirsdale, Arlington, Jacksonville, Oceanway, 
and Tallyrand
308 AM EST Wed Jan 3 2018

...WIND CHILL ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 11 AM
EST THURSDAY...

* WHAT...Very cold wind chills expected. The cold wind chills may
  cause frostbite in as little as 30 minutes to exposed skin.
  Expect wind chills to range from the mid teens to upper 20s.

* WHERE...St. Johns, Putnam, Flagler, Marion and Coastal Duval 
  County.

* WHEN...7 PM this evening and 11 AM Thursday. The coldest wind 
  chills will occur around 7 AM Thursday.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ025-031-032-036-032200-
/O.EXT.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
/O.CON.KJAX.WW.Y.0001.180103T0900Z-180103T2200Z/
Inland Duval-Bradford-Clay-Alachua-
Including the cities of Normandy, Ortega, Riverside, San Marco, 
Starke, New River, Doctors Inlet, Lakeside, Bellair, Middleburg, 
Orange Park, Gainesville, Gainesville Airport, and Newnans Lake
308 AM EST Wed Jan 3 2018

...WIND CHILL ADVISORY NOW IN EFFECT UNTIL 11 AM EST THURSDAY...
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM EST THIS
AFTERNOON...

* WHAT...Freezing rain expected. Very cold wind chills expected.
  The ice will result in very slippery conditions on sidewalks,
  roads and bridges, including during the morning commute. Total
  ice accumulations of a light glaze are expected. Expect wind
  chills to range from the mid teens to upper 20s.

* WHERE...Inland Duval, Bradford, Clay and Alachua County.

* WHEN...For the Winter Weather Advisory, 4 AM to 5 PM. For the 
  Wind Chill Advisory, until 11 AM Thursday. The coldest wind 
  chills will occur around 7 AM Thursday.

* ADDITIONAL DETAILS...The cold wind chills may cause frostbite 
  in as little as 30 minutes to exposed skin.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory means that periods of freezing rain
will cause travel difficulties. Be prepared for slippery roads.
Slow down and use caution while driving. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$
192 
WWUS42 KJAX 031840
WSWJAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Jacksonville FL
140 PM EST Wed Jan 3 2018

FLZ020>024-030-035-GAZ132>136-149>154-162>166-041600-
/O.CAN.KJAX.WS.W.0001.000000T0000Z-180103T2200Z/
/O.CAN.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
/O.NEW.KJAX.WC.Y.0003.180104T0000Z-180104T1600Z/
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Union-Gilchrist-
Coffee-Jeff Davis-Bacon-Appling-Wayne-Atkinson-Ware-Pierce-
Brantley-Inland Glynn-Coastal Glynn-Echols-Clinch-Charlton-
Inland Camden-Coastal Camden-
Including the cities of Jasper, Jennings, West Lake, Belmont, 
White Springs, Houston, Live Oak, McAlpin, Newburn, 
Suwannee Springs, Columbia, Lake City, Oleno State Park, Lulu, 
Watertown, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, 
Bryceville, Lake Butler, Trenton, Douglas, Hazlehurst, Alma, 
New Lacy, Baxley, Pine Grove, Plant Hatch, Doctortown, Gardi, 
Jesup, Axson, Pearson, Willacoochee, Needham, Waycross, 
Blackshear, Atkinson, Hickox, Hortense, Nahunta, Raybon, 
Waynesville, Hoboken, Thalmann, Jekyll Island, Glynn Haven, 
Sea Island, St. Simons, Country Club Estate, Dock Junction, 
Needmore, Statenville, Homerville, Folkston, St. George, Winokur,
Homeland, Race Pond, Stephen Foster State Park, Colesburg, 
Tarboro, Waverly, Woodbine, Dover Bluff, Kingsland, and Dungeness
140 PM EST Wed Jan 3 2018

...WIND CHILL ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 11 AM
EST THURSDAY...
...WINTER STORM WARNING IS CANCELLED...

* WHAT...Very cold wind chills expected tonight which could cause
  frostbite in as little as 30 minutes to exposed skin. Expect
  wind chills to range from 20 above zero to 10 above zero.

* WHERE...Northeast Florida and southeast Georgia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ025-031-032-036-041600-
/O.CAN.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
/O.CAN.KJAX.WW.Y.0001.000000T0000Z-180103T2200Z/
/O.NEW.KJAX.WC.Y.0003.180104T0000Z-180104T1600Z/
Inland Duval-Bradford-Clay-Alachua-
Including the cities of Normandy, Ortega, Riverside, San Marco, 
Starke, New River, Doctors Inlet, Lakeside, Bellair, Middleburg, 
Orange Park, Gainesville, Gainesville Airport, and Newnans Lake
140 PM EST Wed Jan 3 2018

...WIND CHILL ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO 11 AM
EST THURSDAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...Very cold wind chills expected tonight which could cause
  frostbite in as little as 30 minutes to exposed skin. Expect
  wind chills to range from 20 above zero to 10 above zero.

* WHERE...Northeast Florida and southeast Georgia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ124-041600-
/O.CAN.KJAX.WW.Y.0001.000000T0000Z-180103T2200Z/
/O.CON.KJAX.WC.Y.0002.180104T0000Z-180104T1600Z/
Coastal Nassau-
Including the cities of Amelia City, Fernandina Beach, and Yulee
140 PM EST Wed Jan 3 2018

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 11 AM EST THURSDAY...
...WINTER WEATHER ADVISORY IS CANCELLED...

* WHAT...Very cold wind chills expected tonight which could cause
  frostbite in as little as 30 minutes to exposed skin. Expect
  wind chills to range from 20 above zero to 10 above zero.

* WHERE...Northeast Florida and southeast Georgia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ033-037-038-040-125-041600-
/O.CON.KJAX.WC.Y.0002.180104T0000Z-180104T1600Z/
St. Johns-Putnam-Flagler-Marion-Coastal Duval-
Including the cities of Ponte Vedra Beach, Durbin, Palm Valley, 
Fruit Cove, Switzerland, Anastasia, Bakersville, Bostwick, 
Carraway, Palatka, Palm Coast, Anthony, Burbank, Ocala, 
Ocala Airport, Weirsdale, Arlington, Jacksonville, Oceanway, 
and Tallyrand
140 PM EST Wed Jan 3 2018

...WIND CHILL ADVISORY REMAINS IN EFFECT FROM 7 PM THIS EVENING
TO 11 AM EST THURSDAY...

* WHAT...Very cold wind chills expected tonight which could cause
  frostbite in as little as 30 minutes to exposed skin. Expect
  wind chills to range from 20 above zero to 10 above zero.

* WHERE...Northeast Florida and southeast Georgia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$
932 
WWUS42 KJAX 040006
WSWJAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Jacksonville FL
706 PM EST Wed Jan 3 2018

FLZ020>025-030>032-035-036-GAZ132>136-149>154-162>166-041600-
/O.CON.KJAX.WC.Y.0003.000000T0000Z-180104T1600Z/
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Inland Duval-Union-
Bradford-Clay-Gilchrist-Alachua-Coffee-Jeff Davis-Bacon-Appling-
Wayne-Atkinson-Ware-Pierce-Brantley-Inland Glynn-Coastal Glynn-
Echols-Clinch-Charlton-Inland Camden-Coastal Camden-
Including the cities of Jasper, Jennings, West Lake, Belmont, 
White Springs, Houston, Live Oak, McAlpin, Newburn, 
Suwannee Springs, Columbia, Lake City, Oleno State Park, Lulu, 
Watertown, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, 
Bryceville, Normandy, Ortega, Riverside, San Marco, Lake Butler, 
Starke, New River, Doctors Inlet, Lakeside, Bellair, Middleburg, 
Orange Park, Trenton, Gainesville, Gainesville Airport, 
Newnans Lake, Douglas, Hazlehurst, Alma, New Lacy, Baxley, 
Pine Grove, Plant Hatch, Doctortown, Gardi, Jesup, Axson, 
Pearson, Willacoochee, Needham, Waycross, Blackshear, Atkinson, 
Hickox, Hortense, Nahunta, Raybon, Waynesville, Hoboken, 
Thalmann, Jekyll Island, Glynn Haven, Sea Island, St. Simons, 
Country Club Estate, Dock Junction, Needmore, Statenville, 
Homerville, Folkston, St. George, Winokur, Homeland, Race Pond, 
Stephen Foster State Park, Colesburg, Tarboro, Waverly, Woodbine,
Dover Bluff, Kingsland, and Dungeness
706 PM EST Wed Jan 3 2018

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM EST
THURSDAY...

* WHAT...Very cold wind chills expected. The cold wind chills will
  cause frostbite in as little as 30 minutes to exposed skin.
  Expect wind chills to range from 20 above zero to 10 above 
  zero.

* WHERE...Portions of northeast Florida, northern Florida and 
  southeast Georgia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ033-037-038-040-124-125-041600-
/O.CON.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
St. Johns-Putnam-Flagler-Marion-Coastal Nassau-Coastal Duval-
Including the cities of Ponte Vedra Beach, Durbin, Palm Valley, 
Fruit Cove, Switzerland, Anastasia, Bakersville, Bostwick, 
Carraway, Palatka, Palm Coast, Anthony, Burbank, Ocala, 
Ocala Airport, Weirsdale, Amelia City, Fernandina Beach, Yulee, 
Arlington, Jacksonville, Oceanway, and Tallyrand
706 PM EST Wed Jan 3 2018

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM EST
THURSDAY...

* WHAT...Very cold wind chills expected. The cold wind chills will
  cause frostbite in as little as 30 minutes to exposed skin.
  Expect wind chills to range from 20 above zero to 10 above 
  zero.

* WHERE...Portions of northeast Florida and northern Florida.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$
650 
WWUS42 KJAX 040740
WSWJAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Jacksonville FL
240 AM EST Thu Jan 4 2018

FLZ020>025-030>032-035-036-GAZ132>136-149>154-162>166-041600-
/O.CON.KJAX.WC.Y.0003.000000T0000Z-180104T1600Z/
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Inland Duval-Union-
Bradford-Clay-Gilchrist-Alachua-Coffee-Jeff Davis-Bacon-Appling-
Wayne-Atkinson-Ware-Pierce-Brantley-Inland Glynn-Coastal Glynn-
Echols-Clinch-Charlton-Inland Camden-Coastal Camden-
Including the cities of Jasper, Jennings, West Lake, Belmont, 
White Springs, Houston, Live Oak, McAlpin, Newburn, 
Suwannee Springs, Columbia, Lake City, Oleno State Park, Lulu, 
Watertown, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, 
Bryceville, Normandy, Ortega, Riverside, San Marco, Lake Butler, 
Starke, New River, Doctors Inlet, Lakeside, Bellair, Middleburg, 
Orange Park, Trenton, Gainesville, Gainesville Airport, 
Newnans Lake, Douglas, Hazlehurst, Alma, New Lacy, Baxley, 
Pine Grove, Plant Hatch, Doctortown, Gardi, Jesup, Axson, 
Pearson, Willacoochee, Needham, Waycross, Blackshear, Atkinson, 
Hickox, Hortense, Nahunta, Raybon, Waynesville, Hoboken, 
Thalmann, Jekyll Island, Glynn Haven, Sea Island, St. Simons, 
Country Club Estate, Dock Junction, Needmore, Statenville, 
Homerville, Folkston, St. George, Winokur, Homeland, Race Pond, 
Stephen Foster State Park, Colesburg, Tarboro, Waverly, Woodbine,
Dover Bluff, Kingsland, and Dungeness
240 AM EST Thu Jan 4 2018

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM EST THIS
MORNING...

* WHAT...Very cold wind chills expected. The cold wind chills may 
  cause frostbite in as little as 30 minutes to exposed skin. 
  Expect wind chills to range from 25 above zero to 10 above zero.

* WHERE...Portions of northeast Florida, northern Florida and 
  southeast Georgia.

* WHEN...until 11 AM this morning. The coldest wind chills will 
  occur around 7 AM this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$

FLZ033-037-038-040-124-125-041600-
/O.CON.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
St. Johns-Putnam-Flagler-Marion-Coastal Nassau-Coastal Duval-
Including the cities of Ponte Vedra Beach, Durbin, Palm Valley, 
Fruit Cove, Switzerland, Anastasia, Bakersville, Bostwick, 
Carraway, Palatka, Palm Coast, Anthony, Burbank, Ocala, 
Ocala Airport, Weirsdale, Amelia City, Fernandina Beach, Yulee, 
Arlington, Jacksonville, Oceanway, and Tallyrand
240 AM EST Thu Jan 4 2018

...WIND CHILL ADVISORY REMAINS IN EFFECT UNTIL 11 AM EST THIS
MORNING...

* WHAT...Very cold wind chills expected. The cold wind chills may
  cause frostbite in as little as 30 minutes to exposed skin.
  Expect wind chills to range from 25 above zero to 15 above 
  zero.

* WHERE...Portions of northeast Florida.

* WHEN...until 11 AM this morning. The coldest wind chills will 
  occur around 6 AM this morning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Wind Chill Advisory means that cold air and the wind will
combine to create low wind chills. Frost bite and hypothermia can
occur if precautions are not taken. Make sure you wear a hat and
gloves.

&&

$$
919 
WWUS42 KJAX 041554
WSWJAX

URGENT - WINTER WEATHER MESSAGE
National Weather Service Jacksonville FL
1054 AM EST Thu Jan 4 2018

FLZ020>025-030>032-035-036-GAZ132>136-149>154-162>166-041700-
/O.EXP.KJAX.WC.Y.0003.000000T0000Z-180104T1600Z/
Hamilton-Suwannee-Columbia-Baker-Inland Nassau-Inland Duval-Union-
Bradford-Clay-Gilchrist-Alachua-Coffee-Jeff Davis-Bacon-Appling-
Wayne-Atkinson-Ware-Pierce-Brantley-Inland Glynn-Coastal Glynn-
Echols-Clinch-Charlton-Inland Camden-Coastal Camden-
Including the cities of Jasper, Jennings, West Lake, Belmont, 
White Springs, Houston, Live Oak, McAlpin, Newburn, 
Suwannee Springs, Columbia, Lake City, Oleno State Park, Lulu, 
Watertown, Macclenny, Olustee, Ratliff, Hilliard, Kings Ferry, 
Bryceville, Normandy, Ortega, Riverside, San Marco, Lake Butler, 
Starke, New River, Doctors Inlet, Lakeside, Bellair, Middleburg, 
Orange Park, Trenton, Gainesville, Gainesville Airport, 
Newnans Lake, Douglas, Hazlehurst, Alma, New Lacy, Baxley, 
Pine Grove, Plant Hatch, Doctortown, Gardi, Jesup, Axson, 
Pearson, Willacoochee, Needham, Waycross, Blackshear, Atkinson, 
Hickox, Hortense, Nahunta, Raybon, Waynesville, Hoboken, 
Thalmann, Jekyll Island, Glynn Haven, Sea Island, St. Simons, 
Country Club Estate, Dock Junction, Needmore, Statenville, 
Homerville, Folkston, St. George, Winokur, Homeland, Race Pond, 
Stephen Foster State Park, Colesburg, Tarboro, Waverly, Woodbine,
Dover Bluff, Kingsland, and Dungeness
1054 AM EST Thu Jan 4 2018

...WIND CHILL ADVISORY WILL EXPIRE AT 11 AM EST THIS MORNING...

$$

FLZ033-037-038-040-124-125-041700-
/O.EXP.KJAX.WC.Y.0002.000000T0000Z-180104T1600Z/
St. Johns-Putnam-Flagler-Marion-Coastal Nassau-Coastal Duval-
Including the cities of Ponte Vedra Beach, Durbin, Palm Valley, 
Fruit Cove, Switzerland, Anastasia, Bakersville, Bostwick, 
Carraway, Palatka, Palm Coast, Anthony, Burbank, Ocala, 
Ocala Airport, Weirsdale, Amelia City, Fernandina Beach, Yulee, 
Arlington, Jacksonville, Oceanway, and Tallyrand
1054 AM EST Thu Jan 4 2018

...WIND CHILL ADVISORY WILL EXPIRE AT 11 AM EST THIS MORNING...

$$

What forecasters said that day

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

NWS Jacksonville, FL wrote its last area forecast discussion before this wind chill advisory went out at Jan 2, 8:55 AM EST, 6 hours 21 minutes earlier.

Area forecast discussion, Jan 2, 8:55 AM EST, 6 hours 21 minutes before
Area Forecast Discussion
National Weather Service Jacksonville FL
855 AM EST Tue Jan 2 2018

.UPDATE...Will allow different advisories in effect until 10 am-
Noon to expire. Expecting mostly cloudy skies S of I-10 corridor
with some partial insolation north. Latest consensus temperature
guidance support current high temp forecast for Today. Will
maintain wind advisory coastal ne FL counties where seeing
30-35 mph gusts.

Did not adjust current Winter Storm Watch...although considered
addding Duval...Union, Bradford given threat to western portion
of those counties. To prevent risk of flip flop...decided to
defer to afternoon when warning/ advisory decisions will be made
based on latest guidance. Will be a very difficult decision given
a climatologically rare threat with potentially significant impact
for our area, and a shallow cold air pattern our model guidance
tends to do poorly with.

&&

.AVIATION...Currently seeing some MFVR cigs at coastal TAF sites.
Anticipating generally VFR cigs Today...with worsening conditions
later Tonight.

&&

.MARINE...No changes planned in next CWF issuance...with Gale
Warning continuing til evening.

Rip Currents: High Risk with strong onshore flow. Continuing
high surf advisory ne FL coast.

&&

.PRELIMINARY POINT TEMPS/POPS...
AMG  40  27  38  23 /   0  10  50   0
SSI  41  34  40  26 /   0  70  90   0
JAX  42  33  41  25 /   0  90  80   0
SGJ  44  40  46  28 /  10  80  80   0
GNV  43  34  43  24 /   0  60  80   0
OCF  46  37  45  26 /   0  40  80   0

&&

.JAX WATCHES/WARNINGS/ADVISORIES...
FL...Hard Freeze Warning until 10 AM EST this morning for Baker-
     Columbia-Gilchrist-Hamilton-Inland Nassau-Suwannee-Union.

     Winter Storm Watch from late tonight through Wednesday afternoon
     for Baker-Columbia-Gilchrist-Hamilton-Inland Nassau-
     Suwannee-Union.

     Wind Chill Advisory until 11 AM EST this morning for Alachua-
     Baker-Bradford-Clay-Coastal Duval-Coastal Nassau-Columbia-
     Gilchrist-Hamilton-Inland Duval-Inland Nassau-Marion-Putnam-
     St. Johns-Suwannee-Union.

     High Rip Current Risk until 7 PM EST this evening for Coastal
     Duval-Coastal Nassau-Flagler-St. Johns.

     Freeze Warning until 10 AM EST this morning for Alachua-Bradford-
     Clay-Coastal Nassau-Inland Duval-Putnam.

     Coastal Flood Advisory until noon EST today for Coastal Duval-
     Coastal Nassau-Flagler-St. Johns.

     High Surf Advisory until 7 PM EST this evening for Coastal Duval-
     Coastal Nassau-Flagler-St. Johns.

     Wind Advisory until 7 PM EST this evening for Coastal Duval-
     Coastal Nassau-Flagler-St. Johns.

     Freeze Watch from this evening through Wednesday morning for
     Baker-Columbia-Gilchrist-Hamilton-Inland Nassau-Suwannee-
     Union.

GA...Hard Freeze Warning until 10 AM EST this morning for Appling-
     Atkinson-Bacon-Brantley-Charlton-Clinch-Coffee-Echols-
     Inland Camden-Inland Glynn-Jeff Davis-Pierce-Ware-Wayne.

     Winter Storm Watch from late tonight through Wednesday afternoon
     for Appling-Atkinson-Bacon-Brantley-Charlton-Clinch-Coastal
     Camden-Coastal Glynn-Coffee-Echols-Inland Camden-Inland
     Glynn-Jeff Davis-Pierce-Ware-Wayne.

     Wind Chill Advisory until 11 AM EST this morning for Appling-
     Atkinson-Bacon-Brantley-Charlton-Clinch-Coastal Camden-
     Coastal Glynn-Coffee-Echols-Inland Camden-Inland Glynn-Jeff
     Davis-Pierce-Ware-Wayne.

     High Rip Current Risk until 7 PM EST this evening for Coastal
     Camden-Coastal Glynn.

     Freeze Warning until 10 AM EST this morning for Coastal Camden-
     Coastal Glynn.

     Coastal Flood Advisory until noon EST today for Coastal Camden-
     Coastal Glynn.

AM...Gale Warning until 7 PM EST this evening for Coastal waters from
     Altamaha Sound to Fernandina Beach FL out 20 NM-Coastal
     waters from Fernandina Beach to St. Augustine FL out 20 NM-
     Coastal waters from St. Augustine to Flagler Beach FL out
     20 NM-Waters from Altamaha Sound GA to Fernandina Beach FL
     from 20 to 60 NM-Waters from Fernandina Beach to St.
     Augustine FL from 20 to 60 NM-Waters from St. Augustine to
     Flagler Beach FL from 20 to 60 NM.

&&

Wolf/Cordero/McGinnis

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 2, 3:16 AM ESTCoastal Flood AdvisoryJAXCamden, Glynn9 hr
Jan 2, 3:37 AM ESTWinter Storm WatchJAXAppling, Atkinson, Bacon, Brantley, Camden, Clinch and 6 more12 hr
Jan 2, 3:16 PM ESTWinter Storm WarningJAXAppling, Atkinson, Bacon, Brantley, Camden, Clinch and 6 more22 hr
Jan 2, 3:19 PM ESTHard Freeze WarningJAXAppling, Atkinson, Bacon, Coffee, Jeff Davis, Wayne18 hr
Jan 2, 3:38 PM ESTCoastal Flood AdvisoryJAXCamden, Glynn30 hr
Jan 2, 3:22 AM ESTFreeze WatchJAXBaker, Gilchrist, Nassau, Suwannee, Union12 hr
Jan 2, 3:16 PM ESTWinter Weather AdvisoryJAXBradford, Nassau22 hr
Jan 2, 3:19 PM ESTFreeze WarningJAXBaker, Gilchrist, Nassau, Suwannee, Union22 hr
Jan 2, 3:30 PM ESTGale WatchJAX11 hr
Jan 2, 3:30 PM ESTSmall Craft AdvisoryJAX47 hr

Nearby

Wind Chill Advisories in Georgia, 2018Wind Chill Advisories in Florida, 2018Every wind chill advisory in 2018

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.