The National Weather Service has issued Dense Fog Advisories for all counties in western, southwest, west central and northwest Iowa. In Cass-Adair-Adams-Audubon-Carroll-Crawford-Dallas-Guthrie-Madison-Union-Taylor and Ringgold Counties, a DENSE FOG ADVISORY is in effect until 4-a.m. Sunday. In Monona-Harrison-Shelby-Pottawattamie-Mills-Montgomery-Fremont and Page Counties, a DENSE FOG ADVISORY is in effect until 9-a.m., Sunday.

* VISIBILITY…IS EXPECTED TO DROP TO A QUARTER MILE OR LESS
DURING THE EVENING AND CONTINUE OVERNIGHT. AREAS ALONG AND EAST OF THE MISSOURI RIVER SHOULD SEE THE DENSE FOG FIRST, WITH AN EXPANSION TO THE WEST AND SOUTH THROUGH THE EVENING.

* IMPACTS…REDUCED VISIBILITIES WILL CAUSE SOME DIFFICULT DRIVING
CONDITIONS. ALSO, WITH SOME TEMPERATURES NEAR OR JUST BELOW
FREEZING, LIGHT GLAZING ON ROADS AND SIDEWALKS COULD LEAD TO
SLIPPERY CONDITIONS. CAUTION IS ADVISED WHILE DRIVING OR
WALKING.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING, SLOW DOWN, USE
YOUR HEADLIGHTS, AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

852 AM CST SAT DEC 24 2016…A DENSE FOG ADVISORY IS NOW IN EFFECT UNTIL 1 PM CST THIS AFTERNOON FOR WESTERN AND SOUTHWEST IOWA.

* VISIBILITY…DENSE FOG WILL DROP THE VISIBILITY TO ONE QUARTER
MILE TO ZERO AT TIMES THIS MORNING.

* IMPACTS…WIDESPREAD FROST FORMATION IS BEING REPORTED OVER
NORTH CENTRAL IOWA AS A DIRECT IMPACT OF THIS FOG. THE FROST
WILL CREATE ICY CONDITIONS ACROSS THE AREA. VISIBILITY NEAR
ZERO AT TIMES WILL LENGTHEN TRAVEL TIMES.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING, SLOW DOWN, USE
YOUR LOW BEAM HEADLIGHTS, AND LEAVE PLENTY OF DISTANCE AHEAD OF
YOU. BE ESPECIALLY CAUTIOUS NEAR INTERSECTIONS AND RAILROAD
CROSSINGS.

Today: **Dense Fog Advisory until 9-a.m.**

Dense Fog this morning, otherwise Cloudy. High 39. S @ 5-10.

Tonight: Cloudy. Low 30. NW @ 10.

Christmas Day: Cloudy w/a 90% chance of showers. High 51. SE @ 15-30.

Sunday Night: Showers ending; Becoming P/Cldy. Low around 29.

Monday: Mostly Sunny & colder. High 34.

Tuesday: Mo. Sunny. High 35.

Wednesday: P/Cldy. High 43.

Friday’s High in Atlantic was 37. Our 24-Hour Low (ending at 7-a.m. today) was 21. We received .2” of snow yesterday, and rain, the combined liquid value of which amounted to .19”. Last year on this date, our High in Atlantic was 29 and the low was 14. The Record High in Atlantic on this date was 55 in 1893 & 1964. The Record Low was -23 in 1983.

…DENSE FOG ADVISORY IN EFFECT UNTIL 9 AM CST THIS MORNING…

EARLY THIS MORNING…MOSTLY CLEAR. WIDESPREAD DENSE FOG. WEST WIND NEAR 5 MPH.

TODAY…WIDESPREAD DENSE FOG IN THE MORNING, OTHERWISE PARTLY SUNNY WITH AREAS OF FOG EARLY IN THE AFTERNOON. HIGH IN THE UPPER 30S. SOUTHEAST WIND NEAR 10 MPH.

TONIGHT…MOSTLY CLOUDY. WIDESPREAD FOG THROUGH THE NIGHT. A CHANCE OF DRIZZLE AFTER MIDNIGHT. A CHANCE OF DRIZZLE AND A SLIGHT CHANCE OF THUNDERSTORMS EARLY IN THE MORNING. LOW IN THE LOWER 30S. EAST WIND 5 TO 15 MPH. GUSTS UP TO 25 MPH AFTER MIDNIGHT.

CHRISTMAS DAY…RAIN SHOWERS AND A CHANCE OF THUNDERSTORMS. WIDESPREAD FOG. WINDY, WARMER. HIGH IN THE MID 50S. SOUTHEAST WIND 15 TO 20 MPH WITH GUSTS TO AROUND 30 MPH INCREASING TO 20 TO 30 MPH WITH GUSTS TO AROUND 40 MPH IN THE AFTERNOON. CHANCE OF PRECIPITATION NEAR 100 PERCENT.

SUNDAY NIGHT…PARTLY CLOUDY. A 40 PERCENT CHANCE OF LIGHT RAIN SHOWERS THROUGH MIDNIGHT. BREEZY. LOW IN THE UPPER 20S. SOUTHWEST WIND 15 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.

MONDAY…SUNNY, BREEZY, COLDER. HIGH IN THE MID 30S. WEST WIND 15 TO 20 MPH WITH GUSTS TO AROUND 30 MPH.

TUESDAY…SUNNY. HIGH IN THE UPPER 30S.

THE NATIONAL WEATHER SERVICE SAYS A DENSE FOG ADVISORY IS IN EFFECT UNTIL 9 AM TODAY (SATURDAY) FOR ALL OF WESTERN AND SOUTHWEST IOWA, PARTS OF NORTHWEST AND NORTH CENTRAL IOWA.

* VISIBILITY…DENSE FOG WILL DROP VISIBILITIES TO ONE QUARTER MILE OR LESS AT TIMES THIS MORNING.

* IMPACTS…IN ADDITION TO VISIBILITY RESTRICTIONS THIS MORNING…THE FOG MAY CREATE A LIGHT MIST OR RESULT IN FROST ON ROADWAYS AND CAUSE ICY PATCHES ESPECIALLY ON OVERPASSES AND BRIDGES.

Dense Fog Advisory for Counties in gray.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING, SLOW DOWN, USE YOUR HEADLIGHTS, AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.

147 PM CST FRI DEC 23 2016

SNOW WILL END FROM WEST TO EAST THIS AFTERNOON….SNOW IS BEGINNING TO DIMINISH AND WILL END DURING THE AFTERNOON…WITH LIGHT ADDITIONAL ACCUMULATIONS BEFORE SUNSET.

THE WINTER WEATHER ADVISORY IS CANCELLED. SOME ROADS MAY REMAIN SLICK HOWEVER.

AREA COUNTIES: SAC-CRAWFORD-CARROLL-AUDUBON-GUTHRIE...

A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM. (12/23). MONONA-HARRISON-POTTAWATTAMIE & SHELBY COUNTIES: A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1-P.M.

* TIMING…SNOW WILL PERSIST INTO THE AFTERNOON…THEN END FROM
WEST TO EAST BEFORE SUNSET.

* STORM TOTAL SNOW ACCUMULATIONS…3 TO 5 INCHES WITH ISOLATED HIGHER AMOUNTS, ESPECIALLY IN THOSE COUNTIES NORTH OF I-80.

* WINDS/VISIBILITY…SOUTH AT 15 TO 25 MPH AND GUSTY. VISIBILITIES
WILL BE REDUCED AT TIMES TO LESS THAN ONE HALF MILE IN SNOW AT
TIMES. SOME PATCHY BLOWING SNOW IS ALSO EXPECTED.

* IMPACTS…SLICK…SNOW-COVERED ROADS. REDUCED VISIBILITIES.
TRAVEL WITH CAUTION. REDUCE YOUR SPEED AND INCREASE THE SPACING
BETWEEN YOU AND THE VEHICLE AHEAD OF YOU. HOLIDAY TRAVELERS
SHOULD REMAIN ALERT TO ROAD CONDITIONS BY CHECKING THE LATEST
ROAD REPORT PRIOR TO HEADING OUT.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE
DRIVING.

NORMAN, Okla. (AP) – The weather outside will be frightful for some holiday travelers this weekend, with snow stretching from the Rocky Mountains to the upper Midwest on Christmas Eve and possible severe weather in the middle of the U.S. on Christmas Day. Forecasters cautioned travelers to keep alternate routes in mind and prepare for possible delays.

There is a blizzard watch posted for much of the Dakotas and a winter storm watch in effect from Montana to Lake Superior. The Storm Prediction Center cautioned that warm, humid air would bring possible severe weather to the Plains states on Sunday – reaching as far north as Omaha, Nebraska.

A lesser threat of severe weather extended southward into Arkansas and Oklahoma, where the atmosphere would be warm but more stable.

Today: Cloudy w/a mix of rain/sleet or snow (<1” snow in Atlantic) through about 2-p.m.. High 37. S @ 10-20.

Tonight: Cloudy to P/Cldy w/widespread fog. Low 20. NW @ 10.

Tomorrow: Areas of fog during the morning & evening, otherwise P/Cloudy. High near 40. Variable breeze @ 10-15.

Saturday Night: A slight chance of drizzle of freezing drizzle. Low around 32.

Sunday: Cloudy, windy & mild w/morning rain & afternoon thunderstorms. High 54.

Monday: P/Cldy to Cloudy & cooler. High near 38.

Thursday’s High in Atlantic was 43. We received a Trace of snow this morning (between 6-7-a.m.). Our 24-Hour Low (ending at 7-a.m. today) was 15. Last year on this date, our High in Atlantic was 41 and the low was 27. The Record High in Atlantic on this date was 62 in 1964. The Record Low was -22 in 1983.

(Update 6:20-a.m.) THE NATIONAL WEATHER SERVICE HAS EXPANDED THE WINTER WEATHER ADVISORY TO AUDUBON AND GUTHRIE COUNTIES.

Monona-Harrison Pottawattamie & Shelby Counties: Winter Weather Advisory in effect until 1-p.m. today (Friday). Audubon-Guthrie-Sac-Crawford & Carroll Counties: Winter Weather Advisory in effect until 6-p.m. today.

* TIMING…SNOW WILL CONTINUE THIS MORNING AND SLOWLY INTENSIFY
INTO MID MORNING. HEAVIEST SNOW WILL OCCUR LATE THIS MORNING
WITH THE SNOW ENDING BY LATE AFTERNOON.

* STORM TOTAL SNOW ACCUMULATIONS…2 TO 5 INCHES.

* WINDS/VISIBILITY…SOUTH AT 15 TO 25 MPH AND GUSTY.
* VISIBILITIES WILL BE REDUCED AT TIMES TO LESS THAN ONE HALF
MILE IN SNOW. SOME PATCHY BLOWING SNOW IS ALSO EXPECTED.

* IMPACTS…SLICK…SNOW-COVERED ROADS. REDUCED VISIBILITIES…
TRAVEL WITH CAUTION. REDUCE YOUR SPEED AND INCREASE THE
SPACING BETWEEN YOU AND THE VEHICLE AHEAD OF YOU. ALLOW ENOUGH
TIME FOR STOPPING IN SLICK CONDITIONS. HOLIDAY TRAVELERS
SHOULD REMAIN ALERT TO ROAD CONDITIONS BY CHECKING THE LATEST
ROAD REPORT PRIOR TO HEADING OUT.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES, AND USE CAUTION WHILE
DRIVING.