WINTER WEATHER ADVISORY
Issue Date: 950 PM CST WED DEC 23 2009
Expiration: 600 AM CST THU DEC 24 2009

...POTENTIALLY CRIPPLING WINTER STORM TONIGHT THROUGH FRIDAY...
.A WINTRY MIX WILL PERSIST ACROSS THE NORTHERN HALF OF IOWA
TONIGHT. THIS WILL NOT EVEN BE THE MOST SIGNIFICANT PORTION OF
THE STORM WHICH WILL OCCUR THURSDAY NIGHT THROUGH FRIDAY NIGHT
WHEN LARGE AMOUNTS OF WIND BLOWN SNOW MAY OCCUR OVER THE
NORTHWEST THIRD OF THE STATE.
IAZ037>039-047>050-241200-
/O.EXT.KDMX.WW.Y.0026.000000T0000Z-091224T1200Z/
/O.CON.KDMX.WS.A.0007.091224T1800Z-091226T0600Z/
HARDIN-GRUNDY-BLACK HAWK-BOONE-STORY-MARSHALL-TAMA-
INCLUDING THE CITIES OF...ELDORA...GRUNDY CENTER...WATERLOO...
BOONE...AMES...MARSHALLTOWN...TOLEDO
950 PM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 6 AM CST
THURSDAY...
...WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...
THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 6 AM CST
THURSDAY. A WINTER STORM WATCH REMAINS IN EFFECT FROM THURSDAY
AFTERNOON THROUGH FRIDAY EVENING.
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...PERIODS OF FREEZING DRIZZLE TO LIGHT RAIN
WILL PERSIST THROUGH THE OVERNIGHT. TEMPERATURES WILL BE NEAR
FREEZING SO ICE ACCUMULATIONS WILL VARY WITH THE BEST THREAT OF
ACCUMULATING ICE NEAR THE HIGHWAY 20 CORRIDOR. A GRADUAL
TRANSITION TO ALL RAIN IS EXPECTED OVERNIGHT AS TEMPERATURES
EASE ABOVE FREEZING. HOWEVER...TRAVEL WILL REMAIN
HAZARDOUS...ESPECIALLY ON LESS TRAVELED ROADS.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION SHOULD SWITCH TO MAINLY
RAIN LATE TONIGHT BEFORE TRANSITIONING BACK TO A WINTRY MIX
AND EVENTUALLY ALL SNOW LATE THURSDAY. ONCE IT DOES THE SNOW
MAY BE HEAVY AND WIND BLOWN...ESPECIALLY INTO FRIDAY WHEN THE
WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...BY THE TIME THE PRECIPITATION
DIMINISHES SATURDAY...SIX TO TWELVE INCHES OF SNOW IS EXPECTED
WITH THE HIGHEST AMOUNTS OF THAT RANGE FROM NEAR BOONE TO IOWA
FALLS.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON TODAY
INTO THURSDAY. BY FRIDAY...WINDS WILL BECOME NORTHWEST AT 25
TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...DURING THE PERIODS OF HEAVIER SNOW LATE THURSDAY
AND 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 ESPECIALLY WEST OF INTERSTATE 35.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE
WATCH AREA ON ON CHRISTMAS EVE NIGHT AND CHRISTMAS DAY 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 MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY 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.
$$

HAZARDOUS WEATHER OUTLOOK
Issue Date: 441 PM CST WED DEC 23 2009
Expiration: 600 AM CST THU DEC 24 2009

Expires:200912241200;;
FLUS43 KDMX 232221 CCA
HWODMX
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
416 PM CST WED DEC 23 2009
IAZ037-038-047-048-241200-
HARDIN-GRUNDY-BOONE-STORY-
416 PM CST WED DEC 23 2009
THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.
.DAY ONE...THIS AFTERNOON AND TONIGHT
A WINTER WEATHER ADVISORY IS IN EFFECT FOR THE AREA THROUGH
MIDNIGHT. PLEASE REFER TO THE NATIONAL WEATHER SERVICE WEBSITE AT
WEATHER.GOV/DESMOINES FOR FURTHER DETAILS. A MIX OF
SLEET...FREEZING RAIN...AND SNOW IS EXPECTED TO CONTINUE OVER THE
AREA INTO TONIGHT...LEADING TO SOME ICE AND SNOW ACCUMULATIONS.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY
A WINTER STORM WATCH IS IN EFFECT FOR THE AREA FROM THURSDAY
AFTERNOON THROUGH FRIDAY NIGHT. PLEASE REFER TO THE NATIONAL
WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER
DETAILS.
A VERY STRONG LOW PRESSURE SYSTEM IS FORECAST TO SLOWLY APPROACH
THE STATE AND BRING A WINTRY MIX OF SNOW...SLEET...AND FREEZING
RAIN TO THE AREA THROUGH THURSDAY AFTERNOON. THE PRECIPITATION
WILL THEN CHANGE OVER TO ALL SNOW ON THURSDAY NIGHT INTO FRIDAY
MORNING AND CONTINUE INTO THE WEEKEND.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NEEDED...BUT ANY SNOWFALL AND ICE
ACCUMULATION REPORTS ARE APPRECIATED AND ENCOURAGED.
$$

WINTER STORM WATCH
Issue Date: 507 AM CST WED DEC 23 2009
Expiration: 1200 AM CST SAT DEC 26 2009

...ICY CONDITIONS TONIGHT...FOLLOWED BY A MAJOR WINTER STORM
WEDNESDAY THROUGH FRIDAY...
.ICY CONDITIONS WILL AFFECT OUR REGION TONIGHT INTO WEDNESDAY.
THEN...AN APPROACHING LOW PRESSURE SYSTEM WILL BRING RAIN AND A
MIX OF WINTRY WEATHER STATEWIDE THROUGH FRIDAY. HEAVY
PRECIPITATION IS EXPECTED AT TIMES FROM WEDNESDAY ONWARD...
FOLLOWED BY STRONG WINDS ON THURSDAY AND FRIDAY.
IAZ037>039-047>050-057>060-070-071-231600-
/O.CAN.KDMX.ZR.Y.0001.000000T0000Z-091223T1800Z/
/O.NEW.KDMX.WW.Y.0026.091223T1107Z-091224T0600Z/
/O.EXT.KDMX.WS.A.0007.091224T1800Z-091226T0600Z/
HARDIN-GRUNDY-BLACK HAWK-BOONE-STORY-MARSHALL-TAMA-AUDUBON-
GUTHRIE-DALLAS-POLK-CASS-ADAIR-
INCLUDING THE CITIES OF...ELDORA...GRUNDY CENTER...WATERLOO...
BOONE...AMES...MARSHALLTOWN...TOLEDO...AUDUBON...GUTHRIE CENTER...
ADEL...DES MOINES...ATLANTIC...GREENFIELD
507 AM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT CST TONIGHT...
...WINTER STORM WATCH NOW IN EFFECT FROM THURSDAY AFTERNOON
THROUGH FRIDAY EVENING...
...FREEZING RAIN ADVISORY IS CANCELLED...
THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER
WEATHER ADVISORY FOR FREEZING RAIN...SLEET OR SNOW...WHICH IS IN
EFFECT UNTIL MIDNIGHT CST TONIGHT. THE FREEZING RAIN ADVISORY HAS
BEEN CANCELED. THE WINTER STORM WATCH IS NOW IN EFFECT FROM
THURSDAY AFTERNOON THROUGH FRIDAY EVENING.
...WINTER WEATHER ADVISORY...
* SHORT TERM TRENDS...AN AREA OF SHOWERS...AND EVEN A FEW
THUNDERSTORMS...OVER KANSAS AND MISSOURI WILL ADVANCE NORTHWARD
INTO SOUTHERN IOWA THIS MORNING. AS IT DOES THE PRECIPITATION
WILL SWITCH TO A MORE WINTER VARIETY BECOMING FREEZING RAIN AND
THEN EVENTUALLY SLEET OR SNOW BY THE TIME IT HITS CENTRAL IOWA
TOWARD MIDDAY. UP TO A TENTH OF AN INCH OF ICE...AND AN INCH OR
LESS OF SNOW MAY ACCUMULATE BY THROUGH THIS EVENING.
...WINTER STORM WATCH...
* LONG TERM TRENDS...THE PRECIPITATION SHOULD SWITCH TO MAINLY
RAIN LATE TONIGHT AND EARLY THURSDAY BEFORE TRANSITIONING BACK
TO A WINTRY MIX AND EVENTUALLY ALL SNOW LATE THURSDAY. ONCE IT
DOES THE SNOW MAY BE HEAVY AND WIND BLOWN...ESPECIALLY INTO
FRIDAY WHEN THE WINDS INCREASE.
* STORM TOTAL SNOW ACCUMULATIONS...BY THE TIME THE PRECIPITATION
DIMINISHES SATURDAY...THREE TO NINE INCHES OF SNOW IS EXPECTED
WITH THE HIGHEST AMOUNTS OF THAT RANGE FROM ATLANTIC TO IOWA
FALLS.
* WINDS...BRISK EAST WINDS OF 15 TO 25 MPH WILL BE COMMON
WEDNESDAY INTO THURSDAY. BY FRIDAY...WINDS WILL BECOME
NORTHWEST AT 25 TO 35 MPH WITH HIGHER GUSTS.
* VISIBILITY...DURING THE PERIODS OF HEAVIER SNOW LATE THURSDAY AND
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 ESPECIALLY WEST OF INTERSTATE 35.
* IMPACTS...TRAVEL WILL BECOME INCREASINGLY DIFFICULT IN THE WATCH
AREA ON ON CHRISTMAS EVE NIGHT AND CHRISTMAS DAY 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 MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY 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.
$$