HAZARDOUS WEATHER OUTLOOK
Issue Date: 114 PM CST TUE DEC 22 2009
Expiration: 115 PM CST WED DEC 23 2009

Expires:200912231915;;
FLUS43 KDMX 221910
HWODMX
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
110 PM CST TUE DEC 22 2009
IAZ004>007-015>017-023>028-033>039-044>050-057-058-231915-
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-
110 PM CST TUE DEC 22 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.
.DAY ONE...THIS AFTERNOON AND TONIGHT
AREAS OF FREEZING DRIZZLE WILL AFFECT MUCH OF THE AREA TODAY AND
TONIGHT...RESULTING IN A LIGHT GLAZE OF ICE ACCRUAL.
A FREEZING RAIN ADVISORY IS IN EFFECT FOR THE AREA THROUGH
WEDNESDAY MORNING. PLEASE REFER TO THE NATIONAL WEATHER SERVICE
WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.
.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY
A MAJOR WINTER STORM IS EXPECTED TO BRING THE POTENTIAL FOR ICE
ACCUMULATIONS WEDNESDAY INTO THURSDAY...THEN CHANGING TO SNOW
THURSDAY NIGHT INTO FRIDAY. A WINTER STORM WATCH IS IN EFFECT FOR
THE AREA FROM WEDNESDAY MORNING THROUGH FRIDAY AFTERNOON. PLEASE
REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT SNOWFALL AMOUNTS AND
ICE ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED.
$$

FREEZING RAIN ADVISORY
Issue Date: 1245 PM CST TUE DEC 22 2009
Expiration: 600 AM CST WED DEC 23 2009

...ICY CONDITIONS TODAY...FOLLOWED BY A MAJOR WINTER STORM
WEDNESDAY THROUGH FRIDAY...
.ICY CONDITIONS WILL AFFECT NORTHERN AND CENTRAL IOWA INTO
TONIGHT. THEN...AN APPROACHING LOW PRESSURE SYSTEM WILL BRING US
RAIN AND A MIX OF WINTRY WEATHER STATEWIDE THROUGH FRIDAY. HEAVY
PRECIPITATION IS EXPECTED...FOLLOWED BY STRONG WINDS ON THURSDAY
AND FRIDAY.
IAZ004>007-015>017-023>028-033>039-044>050-057-058-230245-
/O.NEW.KDMX.ZR.Y.0001.091222T1900Z-091223T1200Z/
/O.CON.KDMX.WS.A.0007.091223T1200Z-091226T0000Z/
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-WRIGHT-FRANKLIN-BUTLER-BREMER-SAC-CALHOUN-
WEBSTER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-CRAWFORD-CARROLL-GREENE-
BOONE-STORY-MARSHALL-TAMA-AUDUBON-GUTHRIE-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS...
HUMBOLDT...CLARION...HAMPTON...ALLISON...WAVERLY...SAC CITY...
ROCKWELL CITY...FORT DODGE...WEBSTER CITY...ELDORA...
GRUNDY CENTER...WATERLOO...DENISON...CARROLL...JEFFERSON...
BOONE...AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER
1245 PM CST TUE DEC 22 2009
...FREEZING RAIN ADVISORY IN EFFECT UNTIL 6 AM CST WEDNESDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY AFTERNOON...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A FREEZING
RAIN ADVISORY...WHICH IS IN EFFECT UNTIL 6 AM CST WEDNESDAY. A
WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY MORNING
THROUGH FRIDAY AFTERNOON.
...FREEZING RAIN ADVISORY...
* TIMING...FREEZING DRIZZLE WAS ALREADY OVER NORTHERN IOWA. IT
WILL SPREAD SOUTHWARD WITH TIME...INTO CENTRAL IOWA BY THIS
EVENING.
* ICE ACCUMULATIONS...UP TO A TENTH OF INCH OF ICE ACCUMULATION
IS EXPECTED THROUGH WEDNESDAY MORNING...FROM U.S. HIGHWAY 20
NORTHWARD. LESSER AMOUNTS ARE EXPECTED TO THE SOUTH.
* VISIBILITY...THE FREEZING DRIZZLE WILL COMBINE WITH AREAS OF FOG
TO REDUCE VISIBILITIES TO LESS THAN ONE MILE...AND AS LOW AS A
HALF MILE IN AREAS.
* IMPACTS...TRAVEL WILL BE HAZARDOUS WITH AREAS OF BLACK
ICE...ESPECIALLY ON LESS TREATED ROADS. IT WILL TAKE ONLY VERY
MINOR ICE ACCUMULATIONS TO CAUSE TRAVEL DIFFICULTIES. IN
ADDITION...THE ICE CAN BE DIFFICULT TO SEE ON THE ROAD...SO A
ROAD THAT APPEARS TO BE CLEAR MAY ACTUALLY BE ICY.
...WINTER STORM WATCH...
* TIMING...ALTHOUGH FREEZING DRIZZLE MAY OCCUR LATER TODAY AND
TONIGHT...THE MOST SIGNIFICANT IMPACTS WITH THIS STORM SHOULD
OCCUR WEDNESDAY MORNING THROUGH FRIDAY.
* STORM TOTAL ICE ACCUMULATIONS...ICING OF UP TO ONE QUARTER OF
AN INCH IS EXPECTED FROM THE HIGHWAY 30 TO HIGHWAY 20
CORRIDORS THROUGH THURSDAY WITH LESSER AMOUNTS EITHER SIDE OF
THOSE AREAS.
* STORM TOTAL SNOW ACCUMULATIONS...THE PRECIPITATION SHOULD
BECOME PRIMARILY SNOW LATE THURSDAY WITH TOTAL ACCUMULATIONS
FROM 2 TO 4 INCHES FROM ATLANTIC...DES MOINES AND GRINNELL...
UP TO OVER A FOOT ALONG AND WEST OF A DENISON...TO FORT
DODGE... TO MASON CITY LINE.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE IN PLACE
THROUGH MUCH OF WEDNESDAY AND THURSDAY BEFORE INCREASING EVEN
FURTHER BY FRIDAY. WINDS BY THAT TIME MAY BE SUSTAINED AT 25
TO 35 MPH WITH GUSTS EVEN HIGHER.
* VISIBILITY...DURING THE PERIODS OF HEAVY SNOW THURSDAY INTO
FRIDAY...VISIBILITIES WILL GENERALLY BE LESS THAN ONE MILE AND
EVEN DOWN TO A QUARTER MILE DURING THE HEAVIEST SNOWS. WITH
INCREASING WINDS AND SNOW COINCIDENT BY FRIDAY...BLOWING SNOW
AND GREATLY REDUCED VISIBILITIES NEAR BLIZZARD CONDITIONS ARE
EXPECTED BY THAT TIME.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE
WATCH AREA ON WEDNESDAY DURING THE WINTRY MIX OF PRECIPITATION
AND CONTINUE TO BE DIFFICULT INTO THURSDAY AND FRIDAY AS SNOW
ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST SNOW AREAS...
TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING AND
DRIFTING SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
A FREEZING RAIN ADVISORY MEANS THAT PERIODS OF FREEZING RAIN OR
FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS. SLOW DOWN AND USE CAUTION WHILE DRIVING.
$$

WINTER STORM WATCH
Issue Date: 344 PM CST MON DEC 21 2009
Expiration: 600 PM CST FRI DEC 25 2009

...MAJOR WINTER STORMS SET TO IMPACT PORTIONS OF IOWA WEDNESDAY
THROUGH FRIDAY...
.LOW PRESSURE WILL MOVE THROUGH IOWA TONIGHT BRINGING SNOW ACROSS
THE NORTHERN HALF OF THE STATE. A MUCH MORE INTENSE SYSTEM IS
FORECAST TO LIFT INTO THE MIDWEST ON WEDNESDAY AND MEANDER SLOWLY
NORTH INTO THURSDAY AND FRIDAY BRINGING SEVERE WINTER WEATHER
CONDITIONS TO PORTIONS OF CENTRAL IOWA.
IAZ004>007-015>017-026>028-220500-
/O.NEW.KDMX.WW.Y.0025.091222T0000Z-091222T1200Z/
/O.NEW.KDMX.WS.A.0007.091223T1200Z-091226T0000Z/
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
FRANKLIN-BUTLER-BREMER-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...HAMPTON...
ALLISON...WAVERLY
344 PM CST MON DEC 21 2009
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 6 AM CST TUESDAY...
...WINTER STORM WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH
FRIDAY AFTERNOON...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER
WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 6 AM CST
TUESDAY. A WINTER STORM WATCH HAS ALSO BEEN ISSUED. THIS WINTER
STORM WATCH IS IN EFFECT FROM WEDNESDAY MORNING THROUGH FRIDAY
AFTERNOON.
WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...EXPECT PERIODS OF LIGHT SNOW TO INTENSIFY
THIS EVENING. SNOWFALL RATES OF ONE HALF INCH PER HOUR CAN BE
EXPECTED BY MID EVENING AS SNOW EXPANDS ACROSS NORTHERN IOWA.
* TIMING...6 PM THIS EVENING TO 6 AM ON TUESDAY MORNING. HEAVIEST
SNOWS ARE EXPECTED BETWEEN 9 PM AND 4 AM.
* STORM TOTAL ACCUMULATIONS...2 TO 5 INCHES WITH HEAVIEST AMOUNTS
ALONG THE MINNESOTA BORDER.
* VISIBILITIES...GENERALLY UNDER 2 MILES WITH THE HEAVIEST SNOW
PRODUCING ONE HALF MILE TO OCCASIONAL ONE QUARTER MILE
VISIBILITIES.
WINTER STORM WATCH...
* TIMING...WEDNESDAY MORNING THROUGH LATE FRIDAY AFTERNOON.
* STORM TOTAL ICE ACCUMULATIONS...UP TO ONE QUARTER INCH FROM THE
HIGHWAY 30 TO HIGHWAY 20 CORRIDORS WITH LESSER AMOUNTS FARTHER
NORTH.
* STORM TOTAL SNOW ACCUMULATIONS...4 TO 6 INCHES ALONG THE
SOUTHERN EDGE OF THE WATCH AREA UP TO OVER A FOOT ALONG AND WEST
OF A CARROLL TO MASON CITY LINE.
* WINDS...EASTERLY WINDS AT 10 TO 20 MPH ON WEDNESDAY INTO
THURSDAY BECOMING NORTHERLY AT 20 TO 30 MPH WITH HIGHER GUSTS ON
FRIDAY.
* VISIBILITY...SNOW AREAS WILL SEE VISIBILITIES GENERALLY LESS
THAN ONE MILE FOR THE DURATION OF THE STORM WITH FREQUENT
VISIBILITIES OF ONE HALF TO ONE QUARTER OF A MILE IN THE HEAVIER
SNOWS. WITH INCREASING WINDS THURSDAY NIGHT AND FRIDAY...BLOWING
SNOW AND REDUCED VISIBILITIES ARE EXPECTED IN THE WATCH AREA.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE WATCH
AREA ON WEDNESDAY AND CONTINUE TO BE DIFFICULT INTO THURSDAY AND
FRIDAY AS SNOW ACCUMULATES AND WINDS INCREASE. IN THE HEAVIEST
SNOW AREAS...TRAVEL MAY BECOME NEARLY IMPOSSIBLE DUE TO BLOWING
AND DRIFTING SNOW THURSDAY NIGHT INTO FRIDAY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL
CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND
LIMITED VISIBILITY...AND USE CAUTION WHILE DRIVING.
A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT
SNOW...SLEET...OR ICE ACCUMULATIONS THAT MAY IMPACT TRAVEL.
CONTINUE TO MONITOR THE LATEST FORECASTS.
$$