Winter Storm Watch 4, NWS Des Moines, IA

686 
WWUS43 KDMX 190258
WSWDMX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
858 PM CST TUE DEC 18 2012

...DANGEROUS WINTER STORM TO IMPACT CENTRAL IOWA LATE WEDNESDAY
INTO THURSDAY...

.A STRONG STORM WILL MOVE INTO THE OKLAHOMA PANHANDLE WEDNESDAY
AFTERNOON BEFORE LIFTING NORTHEAST INTO NORTH CENTRAL ILLINOIS BY
THURSDAY MORNING. IN ADDITION TO SNOW...VERY STRONG NORTHWEST
WINDS WILL PRODUCE CONSIDERABLE BLOWING AND DRIFTING OF SNOW AND
NEAR BLIZZARD CONDITIONS LATE WEDNESDAY NIGHT INTO THURSDAY. THE
COMBINATION WILL RESULT IN DANGEROUS TRAVEL OVER IOWA.

IAZ033>035-044>047-057>059-070>072-081-082-092-093-191100-
/O.CON.KDMX.WS.W.0004.121219T2200Z-121220T1800Z/
SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-GREENE-BOONE-AUDUBON-GUTHRIE-
DALLAS-CASS-ADAIR-MADISON-ADAMS-UNION-TAYLOR-RINGGOLD-
INCLUDING THE CITIES OF...SAC CITY...ROCKWELL CITY...FORT DODGE...
DENISON...CARROLL...JEFFERSON...BOONE...AUDUBON...
GUTHRIE CENTER...ADEL...ATLANTIC...GREENFIELD...WINTERSET...
CORNING...CRESTON...BEDFORD...MOUNT AYR
858 PM CST TUE DEC 18 2012

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 PM WEDNESDAY TO
NOON CST THURSDAY...

* TIMING...PRECIPITATION WILL OVERSPREAD CENTRAL IOWA LATE
  WEDNESDAY AFTERNOON. SNOW IS EXPECTED ALONG AND NORTH OF AN
  ATLANTIC THROUGH JEFFERSON LINE. RAIN IS EXPECTED IN SOUTHERN
  IOWA SOUTH OF A BEDFORD TO OSCEOLA LINE. IN BETWEEN...A RAIN AND
  SNOW MIX IS EXPECTED. THIS PRECIPITATION WILL CHANGE TO ALL SNOW
  LATE WEDNESDAY EVENING BEFORE ENDING THURSDAY MORNING.

* STORM TOTAL SNOW ACCUMULATION...6 TO 10 INCHES OF SNOW ARE
  FORECAST BY THURSDAY MORNING. THE HEAVIEST SNOW AXIS WILL BE
  ALONG A LINE FROM ATLANTIC TO ADEL. THE LOWEST AMOUNTS ARE
  EXPECTED NEAR THE MISSOURI BORDER. SNOW DRIFTS SEVERAL FEET DEEP
  WILL BE POSSIBLE GIVEN THE STRONG WINDS.

* WINDS/VISIBILITY...WINDS WILL BECOME VERY STRONG WEDNESDAY 
  NIGHT FROM THE NORTH NORTHWEST. SUSTAINED WINDS OF 25 TO 35 
  MPH ARE EXPECTED WITH GUSTS OVER 45 MPH POSSIBLE. THE 
  STRONGEST WINDS ARE EXPECTED A FEW HOURS PRIOR TO DAYBREAK 
  THROUGH NOON THURSDAY. NEAR BLIZZARD CONDITIONS MAY OCCUR WITH 
  VISIBILITIES REDUCED BELOW ONE QUARTER OF A MILE FROM TIME TO 
  TIME. 

* IMPACTS...VERY DANGEROUS CONDITIONS ARE EXPECTED TO DEVELOP ON 
  WEDNESDAY NIGHT INTO THURSDAY MORNING. BE PREPARED FOR VERY 
  DIFFICULT TRAVEL AND NEAR BLIZZARD CONDITIONS. THIS WARNING 
  MAY NEED TO BE UPGRADED TO A BLIZZARD WARNING SHOULD FORECAST 
  CONDITIONS WARRANT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

IAZ025>028-036>039-048>050-060>062-073>075-083>086-094>097-191100-
/O.CON.KDMX.WS.W.0004.121220T0000Z-121221T0000Z/
WRIGHT-FRANKLIN-BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
STORY-MARSHALL-TAMA-POLK-JASPER-POWESHIEK-WARREN-MARION-MAHASKA-
CLARKE-LUCAS-MONROE-WAPELLO-DECATUR-WAYNE-APPANOOSE-DAVIS-
INCLUDING THE CITIES OF...CLARION...HAMPTON...ALLISON...WAVERLY...
WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO...AMES...
MARSHALLTOWN...TOLEDO...DES MOINES...NEWTON...GRINNELL...
INDIANOLA...KNOXVILLE...OSKALOOSA...OSCEOLA...CHARITON...ALBIA...
OTTUMWA...LEON...CORYDON...CENTERVILLE...BLOOMFIELD
858 PM CST TUE DEC 18 2012

...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM WEDNESDAY TO
6 PM CST THURSDAY...

* TIMING...PRECIPITATION WILL OVERSPREAD CENTRAL IOWA BY EARLY 
  WEDNESDAY EVENING. SNOW IS EXPECTED ALONG AND NORTH OF A BOONE 
  TO WATERLOO LINE. RAIN IS EXPECTED IN SOUTHERN IOWA SOUTH OF 
  AN OSCEOLA TO OSKALOOSA LINE. IN BETWEEN...A RAIN AND SNOW MIX 
  IS EXPECTED. THIS PRECIPITATION WILL CHANGE TO ALL SNOW LATE 
  WEDNESDAY EVENING BEFORE ENDING ON THURSDAY MORNING. 

* STORM TOTAL SNOW ACCUMULATION...6 TO 12 INCHES OF SNOW IS 
  EXPECTED BY THURSDAY MORNING. THE HEAVIEST SNOW AXIS WILL BE 
  ALONG A LINE FROM DES MOINES TO TAMA. THE LOWEST AMOUNTS ARE 
  EXPECTED NEAR THE MISSOURI BORDER. SNOW DRIFTS SEVERAL FEET 
  DEEP WILL BE POSSIBLE GIVEN THE STRONG WINDS. 

* WINDS/VISIBILITY...WINDS WILL BECOME VERY STRONG WEDNESDAY NIGHT
  FROM THE NORTH NORTHWEST. SUSTAINED WINDS OF 25 TO 35 MPH ARE
  EXPECTED WITH GUSTS OVER 45 MPH POSSIBLE. THE STRONGEST WINDS
  WILL OCCUR A FEW HOURS PRIOR TO DAYBREAK THROUGH NOON THURSDAY.
  NEAR BLIZZARD CONDITIONS ARE POSSIBLE WITH VISIBILITIES REDUCED
  BELOW ONE QUARTER OF A MILE AT TIMES.

* IMPACTS...VERY DANGEROUS CONDITIONS ARE EXPECTED TO DEVELOP
  WEDNESDAY NIGHT INTO THURSDAY MORNING. BE PREPARED FOR VERY
  DIFFICULT TRAVEL AND NEAR BLIZZARD CONDITIONS. THIS WARNING MAY
  NEED TO BE UPGRADED TO A BLIZZARD WARNING SHOULD FORECAST
  CONDITIONS WARRANT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

IAZ004>007-015>017-023-024-191100-
/O.CON.KDMX.WS.A.0004.121220T0000Z-121221T0000Z/
EMMET-KOSSUTH-WINNEBAGO-WORTH-PALO ALTO-HANCOCK-CERRO GORDO-
POCAHONTAS-HUMBOLDT-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...FOREST CITY...
NORTHWOOD...EMMETSBURG...GARNER...MASON CITY...POCAHONTAS...
HUMBOLDT
858 PM CST TUE DEC 18 2012

...WINTER STORM WATCH REMAINS IN EFFECT FROM WEDNESDAY EVENING
THROUGH THURSDAY AFTERNOON...

* TIMING...SNOW IS EXPECTED TO OVERSPREAD THE AREA ON LATE 
  WEDNESDAY AFTERNOON AND PERSIST WEDNESDAY NIGHT BEFORE ENDING. 

* STORM TOTAL SNOW/ICE ACCUMULATIONS...2 TO 5 INCHES OF SNOW 
  WITH LOCALLY HEAVIER AMOUNTS WILL BE POSSIBLE. 

* WINDS/VISIBILITY...WINDS WILL INCREASE FROM THE NORTH 
  NORTHWEST ON WEDNESDAY NIGHT AT 20 TO 30 MPH WITH HIGHER 
  GUSTS. NEAR BLIZZARD CONDITIONS WILL BE POSSIBLE LATE 
  WEDNESDAY NIGHT INTO THURSDAY WITH CONSIDERABLE BLOWING SNOW. 

* IMPACTS...HAZARDOUS CONDITIONS ARE EXPECTED TO DEVELOP ON 
  WEDNESDAY NIGHT INTO THURSDAY MORNING. BE PREPARED FOR NEAR 
  BLIZZARD CONDITIONS. 

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.

&&

$$

011 
WWUS43 KDMX 190958
WSWDMX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE DES MOINES IA
358 AM CST WED DEC 19 2012

...BLIZZARD CONDITIONS TO DEVELOP OVER MUCH OF THE CENTRAL IOWA
TONIGHT AND CONTINUE THROUGH THURSDAY AFTERNOON...

.A STRONG WINTER STORM WILL MOVE INTO THE OKLAHOMA PANHANDLE
TODAY BEFORE LIFTING NORTHEAST INTO WESTERN ILLINOIS BY THURSDAY
MORNING. IN ADDITION TO HEAVY SNOWFALL...VERY STRONG NORTHWEST
WINDS WILL PRODUCE CONSIDERABLE BLOWING AND DRIFTING OF SNOW AND
AT TIMES BLIZZARD CONDITIONS LATE TONIGHT THROUGH THURSDAY
AFTERNOON. THE COMBINATION WILL RESULT IN VERY DANGEROUS TRAVEL
OVER IOWA LATE TONIGHT AND THURSDAY.

IAZ034-035-045>047-057>059-070>072-081-082-092-093-191800-
/O.CAN.KDMX.WS.W.0004.121219T2200Z-121220T1800Z/
/O.NEW.KDMX.BZ.W.0001.121220T0000Z-121220T1800Z/
CALHOUN-WEBSTER-CARROLL-GREENE-BOONE-AUDUBON-GUTHRIE-DALLAS-CASS-
ADAIR-MADISON-ADAMS-UNION-TAYLOR-RINGGOLD-
INCLUDING THE CITIES OF...ROCKWELL CITY...FORT DODGE...CARROLL...
JEFFERSON...BOONE...AUDUBON...GUTHRIE CENTER...ADEL...ATLANTIC...
GREENFIELD...WINTERSET...CORNING...CRESTON...BEDFORD...MOUNT AYR
358 AM CST WED DEC 19 2012

...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON CST
THURSDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A BLIZZARD
WARNING...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO NOON CST
THURSDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. 

* TIMING...PRECIPITATION WILL OVERSPREAD WESTERN IOWA LATE THIS
  AFTERNOON. SNOW IS EXPECTED ALONG AND NORTH OF AN ATLANTIC
  THROUGH JEFFERSON LINE. RAIN IS EXPECTED IN SOUTHERN IOWA SOUTH
  OF A BEDFORD TO OSCEOLA LINE. IN BETWEEN...A RAIN AND SNOW MIX
  IS EXPECTED. THIS PRECIPITATION WILL CHANGE TO ALL SNOW THIS
  EVENING BEFORE ENDING THURSDAY MORNING.

* STORM TOTAL SNOW ACCUMULATION...6 TO 10 INCHES OF SNOW ARE
  FORECAST BY THURSDAY MORNING. THE HEAVIEST SNOW AXIS WILL BE
  ALONG A LINE FROM ATLANTIC TO ADEL. THE LOWEST AMOUNTS ARE
  EXPECTED NEAR THE MISSOURI BORDER. SNOW DRIFTS SEVERAL FEET DEEP
  WILL BE POSSIBLE GIVEN THE STRONG WINDS.

* WINDS/VISIBILITY...WINDS WILL BECOME VERY STRONG LATE TONIGHT
  FROM THE NORTH NORTHWEST. SUSTAINED WINDS OF 25 TO 35 MPH ARE
  EXPECTED WITH GUSTS OVER 45 MPH POSSIBLE. THE STRONGEST WINDS
  ARE EXPECTED A FROM MIDNIGHT THROUGH NOON THURSDAY. BLIZZARD
  CONDITIONS ARE EXPECTED AT TIMES WITH VISIBILITY REDUCED BELOW
  ONE QUARTER OF A MILE.

* IMPACTS...VERY DANGEROUS CONDITIONS ARE EXPECTED TO DEVELOP
  TONIGHT INTO THURSDAY MORNING. BE PREPARED FOR VERY DANGEROUS
  TRAVEL AND BLIZZARD CONDITIONS. IN RURAL AREAS ESPECIALLY...ONLY
  TRAVEL IF YOU MUST...OTHERWISE STAY SAFE AND STAY HOME.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT
CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF
YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET
STRANDED...STAY WITH YOUR VEHICLE.

&&

$$

IAZ025>028-036>039-048>050-060>062-073>075-083>086-094>097-191800-
/O.CAN.KDMX.WS.W.0004.121220T0000Z-121221T0000Z/
/O.NEW.KDMX.BZ.W.0001.121220T0000Z-121221T0000Z/
WRIGHT-FRANKLIN-BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
STORY-MARSHALL-TAMA-POLK-JASPER-POWESHIEK-WARREN-MARION-MAHASKA-
CLARKE-LUCAS-MONROE-WAPELLO-DECATUR-WAYNE-APPANOOSE-DAVIS-
INCLUDING THE CITIES OF...CLARION...HAMPTON...ALLISON...WAVERLY...
WEBSTER CITY...ELDORA...GRUNDY CENTER...WATERLOO...AMES...
MARSHALLTOWN...TOLEDO...DES MOINES...NEWTON...GRINNELL...
INDIANOLA...KNOXVILLE...OSKALOOSA...OSCEOLA...CHARITON...ALBIA...
OTTUMWA...LEON...CORYDON...CENTERVILLE...BLOOMFIELD
358 AM CST WED DEC 19 2012

...BLIZZARD WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST
THURSDAY...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A BLIZZARD
WARNING...WHICH IS IN EFFECT FROM 6 PM THIS EVENING TO 6 PM CST
THURSDAY. THE WINTER STORM WARNING HAS BEEN CANCELLED. 

* TIMING...PRECIPITATION WILL OVERSPREAD CENTRAL IOWA BY THIS
  EVENING. SNOW IS EXPECTED ALONG AND NORTH OF A BOONE TO WATERLOO
  LINE. RAIN IS EXPECTED IN SOUTHERN IOWA SOUTH OF AN OSCEOLA TO
  OSKALOOSA LINE. IN BETWEEN...A RAIN AND SNOW MIX IS EXPECTED.
  THIS PRECIPITATION WILL CHANGE TO ALL SNOW LATE THIS EVENING
  BEFORE ENDING AROUND NOON THURSDAY.

* STORM TOTAL SNOW ACCUMULATION...6 TO 12 INCHES OF SNOW IS
  EXPECTED BY THURSDAY MORNING. THE HEAVIEST SNOW AXIS WILL BE
  ALONG A LINE FROM NEAR DES MOINES TO TAMA. THE LOWEST AMOUNTS
  ARE EXPECTED NEAR THE MISSOURI BORDER. SNOW DRIFTS SEVERAL FEET
  DEEP WILL BE POSSIBLE GIVEN THE STRONG WINDS.

* WINDS/VISIBILITY...WINDS WILL BECOME VERY STRONG TONIGHT FROM
  THE NORTH NORTHWEST. SUSTAINED WINDS OF 25 TO 35 MPH ARE
  EXPECTED WITH GUSTS OVER 45 MPH POSSIBLE. THE STRONGEST WINDS
  WILL OCCUR A FEW HOURS PRIOR TO DAYBREAK THROUGH NOON THURSDAY.
  BLIZZARD CONDITIONS EXPECTED AT TIMES WITH VISIBILITY REDUCED
  BELOW ONE QUARTER OF A MILE.

* IMPACTS...VERY DANGEROUS CONDITIONS ARE EXPECTED TO DEVELOP
  TONIGHT INTO THURSDAY MORNING. BE PREPARED FOR VERY DANGEROUS
  TRAVEL AND BLIZZARD CONDITIONS. IN RURAL AREAS ESPECIALLY...ONLY
  TRAVEL IF YOU MUST...OTHERWISE STAY SAFE AND STAY HOME.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE
EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS
AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT
CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF
YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET
STRANDED...STAY WITH YOUR VEHICLE.

&&

$$

IAZ004-005-015-023-024-191800-
/O.UPG.KDMX.WS.A.0004.121220T0000Z-121221T0000Z/
/O.EXB.KDMX.WS.W.0004.121220T0000Z-121220T1800Z/
EMMET-KOSSUTH-PALO ALTO-POCAHONTAS-HUMBOLDT-
INCLUDING THE CITIES OF...ESTHERVILLE...ALGONA...EMMETSBURG...
POCAHONTAS...HUMBOLDT
358 AM CST WED DEC 19 2012

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON
CST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER
STORM WARNING FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 6
PM THIS EVENING TO NOON CST THURSDAY. THE WINTER STORM WATCH IS NO
LONGER IN EFFECT.

* TIMING...SNOW IS EXPECTED TO OVERSPREAD THE AREA ON LATE THIS
  AFTERNOON OR EARLY EVENING AND PERSIST TONIGHT BEFORE ENDING
  THURSDAY MORNING.

* STORM TOTAL SNOW/ICE ACCUMULATIONS...2 TO 5 INCHES OF SNOW 
  WITH LOCALLY HEAVIER AMOUNTS WILL BE POSSIBLE. 

* WINDS/VISIBILITY...WINDS WILL INCREASE FROM THE NORTH NORTHWEST
  ON TONIGHT AT 20 TO 30 MPH WITH HIGHER GUSTS. NEAR BLIZZARD
  CONDITIONS WILL BE POSSIBLE LATE TONIGHT INTO THURSDAY WITH
  CONSIDERABLE BLOWING SNOW.

* IMPACTS...HAZARDOUS CONDITIONS ARE EXPECTED TO DEVELOP TONIGHT
  INTO THURSDAY MORNING. BE PREPARED FOR NEAR BLIZZARD CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT
AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY
TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY.

&&

$$

IAZ006-007-016-017-191800-
/O.UPG.KDMX.WS.A.0004.121220T0000Z-121221T0000Z/
/O.EXB.KDMX.WS.W.0004.121220T0000Z-121221T0000Z/
WINNEBAGO-WORTH-HANCOCK-CERRO GORDO-
INCLUDING THE CITIES OF...FOREST CITY...NORTHWOOD...GARNER...
MASON CITY
358 AM CST WED DEC 19 2012

...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO 6 PM
CST THURSDAY...

THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A WINTER
STORM WARNING FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 6
PM THIS EVENING TO 6 PM CST THURSDAY. THE WINTER STORM WATCH IS NO
LONGER IN EFFECT.

* TIMING...SNOW IS EXPECTED TO OVERSPREAD THE AREA EARLY THIS
  EVENING AND PERSIST TONIGHT BEFORE ENDING THURSDAY MORNING.

* STORM TOTAL SNOW/ICE ACCUMULATIONS...2 TO 5 INCHES OF SNOW 
  WITH LOCALLY HEAVIER AMOUNTS WILL BE POSSIBLE. 

* WINDS/VISIBILITY...WINDS WILL INCREASE FROM THE NORTH NORTHWEST
  TONIGHT AT 20 TO 30 MPH WITH HIGHER GUSTS. NEAR BLIZZARD
  CONDITIONS WILL BE POSSIBLE LATE TONIGHT INTO THURSDAY WITH
  CONSIDERABLE BLOWING SNOW.

* IMPACTS...HAZARDOUS CONDITIONS ARE EXPECTED TO DEVELOP TONIGHT INTO
  THURSDAY MORNING. BE PREPARED FOR NEAR BLIZZARD CONDITIONS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW MEANS SEVERE
WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT
AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY
TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA
FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN
EMERGENCY.

&&

$$

IAZ033-044-191800-
/O.CON.KDMX.WS.W.0004.121219T2200Z-121220T1800Z/
SAC-CRAWFORD-
INCLUDING THE CITIES OF...SAC CITY...DENISON
358 AM CST WED DEC 19 2012

...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 PM THIS
AFTERNOON TO NOON CST THURSDAY...

* TIMING...PRECIPITATION WILL OVERSPREAD WESTERN IOWA THIS
  AFTERNOON. SNOW IS EXPECTED ALONG AND NORTH OF AN ATLANTIC
  THROUGH JEFFERSON LINE. THE SNOW IS EXPECTED TO CONTINUE

* STORM TOTAL SNOW ACCUMULATION...5 TO 7 INCHES OF SNOW ARE
  FORECAST BY THURSDAY MORNING. SNOW DRIFTS WILL DEVELOP GIVEN THE
  STRONG WINDS AS WELL. 

* WINDS/VISIBILITY...WINDS WILL BECOME VERY STRONG TONIGHT FROM THE
  NORTH NORTHWEST. SUSTAINED WINDS OF 20 TO 30 MPH ARE EXPECTED
  WITH TO NEAR 40 MPH POSSIBLE. THE STRONGEST WINDS ARE EXPECTED
  AROUND MIDNIGHT TONIGHT THROUGH THURSDAY AFTERNOON. NEAR
  BLIZZARD CONDITIONS MAY OCCUR WITH VISIBILITIES REDUCED BELOW
  ONE QUARTER OF A MILE FROM TIME TO TIME.

* IMPACTS...VERY DANGEROUS CONDITIONS ARE EXPECTED TO DEVELOP
  TONIGHT INTO THURSDAY MORNING. BE PREPARED FOR VERY DIFFICULT
  TRAVEL AND NEAR BLIZZARD CONDITIONS AT TIMES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER
CONDITIONS ARE EXPECTED OR OCCURRING.  SIGNIFICANT AMOUNTS OF
SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN
AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT...
FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY.

&&

$$

REV

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE DES MOINES IA
1143 AM CST TUE DEC 18 2012

...SIGNIFICANT WINTER STORM TO IMPACT THE MIDWEST AND PLAINS
WEDNESDAY AND THURSDAY...

.SHORT TERM /TODAY/...

.UPDATE PUBLIC DISCUSSION...
HAVE ISSUED A WINTER WEATHER ADVISORY FOR THE NE CWA BASED ON
REPORTS OF LIGHT FREEZING RAIN AND SNOW LEADING TO ACCIDENTS ON AREA
ROADS. THIS FREEZING RAIN IS ASSOCIATED WITH A FRONTAL BOUNDARY
MOVING SOUTHEAST THROUGH THE CWA AND IS NOT RELATED TO THE LARGER
STORM SYSTEM ON TRACK TO IMPACT THE STATE WEDNESDAY AND THURSDAY.
THIS ADVISORY IS IN EFFECT UNTIL 22Z TODAY.

.PREVIOUS SHORT TERM /TODAY/...
LOW CLOUDS CONTINUE OVER MUCH OF THE AREA THIS MORNING DUE TO
STRATUS THAT HAS DEVELOPED OVER THE PAST 24 TO 36 HOURS WITH HIGH
PRESSURE OFF TO EAST AND WEAK LOW PRESSURE ALOFT.  ANOTHER WAVE IS
CURRENTLY DROPPING SOUTHEAST AND IS LOCATED NEAR THE SOUTH DAKOTA
AND NEBRASKA BORDER THIS MORNING. A WARM FRONT IS DEVELOPING OVER
IOWA NOW AND AT H850-H700 FORCING IS INCREASING ACROSS NORTHWEST
IOWA NOW WITH LIGHT SNOW BEGINNING TO SHOW UP ON RADAR. THE AREA IS
LIFTING TO THE EAST WITH TIME AND SHOULD AFFECT MAINLY FOLKS ALONG
AND NORTH OF HIGHWAY 20 WITH SOME LIGHT PRECIPITATION POSSIBLE TO
HIGHWAY 30. RIGHT ALONG THE IA AND MN BORDER UP TO AN INCH OF SNOW
MAY FALL THROUGH MIDDAY BEFORE THE WEAK SYSTEM AND FORCING MOVES
EAST. OVER THE SOUTH THE BACK EDGE OF THE STRATUS EXTENDS TO NEAR
OMAHA BUT IS ERODING ON THE SOUTH EDGE AS WARM AIR ADVECTION
INCREASES EARLY TODAY. BY THE NOON HOUR THERE WILL BE SOME BREAKS
ACROSS THE SOUTH WHICH SHOULD HELP PUSH AFTERNOON HIGHS BACK INTO
THE LOWER 40S. ACROSS THE NORTH THE CLOUDS WILL HOLD ON LONGER AND
KEEP HIGHS IN THE MID 30S. WINDS WILL BE LIGHT ACROSS THE REGION
TODAY FROM THE SOUTHEAST AND THEN SWITCHING TO THE NORTHWEST BY
AFTERNOON AND EVENING.

.LONG TERM /TONIGHT THROUGH MONDAY/...
MAIN FOCUS IS ON THE MAJOR WINTER STORM TO IMPACT CENTRAL IOWA
WEDNESDAY NIGHT AND THURSDAY.  THE STORM IS JUST COMING ONSHORE NOW
AND WILL PUSH INTO THE AREA WEDNESDAY NIGHT AND THURSDAY.  SOUNDINGS
SHOW THE WEST SATURATING QUICKLY WEDNESDAY AFTERNOON THEN MOISTURE
SPREADS EAST/NORTHEASTWARD.  COLD AIR WRAPS QUICKLY INTO THIS
SYSTEM SO PRECIP SHOULD QUICKLY CHANGE OVER TO SNOW CWA WIDE BY
EVENING.  SNOW RATIOS WILL BE FAIRLY HIGH WITH THIS SYSTEM AS WELL
GIVEN THE AMOUNT OF COLD AIR.  FORCING IS VERY IMPRESSIVE WITH THIS
SYSTEM AND THIS WILL PRODUCE HIGHER PRECIP RATES.  THE EURO AND GFS
DO BOTH HAVE A BAND OF HIGHER QPF IN THE CORRIDOR OF BETTER FORCING
FROM ROUGHLY WATERLOO TO AUDUBON SO I TRIED TO ADJUST SNOWFALL IN
THIS AREA.

I WAS LOOKING AT WHETHER OR NOT TO KICK TO WATCH UP A NOTCH TO A
BLIZZARD WATCH GIVEN THE STRONG NORTH WINDS THAT WILL ACCOMPANY THIS
STORM.  SUSTAINED WINDS OF 30 TO 40 MPH ARE QUITE LIKELY WITH SOME
POTENTIAL OF GUSTS 40+ MPH.  AT THIS POINT HOWEVER WE HAVE NO SNOW
ON THE GROUND AND I RECALL THAT TO GET REDUCED VISIBILITY FOR A
SUSTAINED PERIOD OF TIME THERE SHOULD BE SOME EXISTING SNOW COVER.
HOWEVER...I DO EXPECT SNOW TO BEGIN IN EARNEST IN THE EVENING AND
THE STRONGEST WINDS TO NOT IMPACT THE AREA UNTIL BETWEEN 09Z AND 12Z
SO WITH 6 TO 9 HOURS OF SNOWFALL PRIOR TO THE ONSET OF THE WIND...WE
SHOULD HAVE A SUFFICIENT BLANKET ON THE GROUND.  CONFIDENCE BETWEEN
OFFICES STILL NOT HIGH ENOUGH TO GO BLIZZARD WATCH AS WE ARE STILL
TRYING TO DEFINE WHERE THE HEAVIEST SNOW BAND WILL SET UP. AS A
RESULT WE WILL LEAVE THE WATCH A WINTER STORM WATCH AND HAVE A LOOK
AT ONE MORE MODEL RUN BEFORE MAKING THAT DECISION.

FOR THE REMAINDER OF THE EXTENDED I GENERALLY LOWERED TEMPS IN
ANTICIPATION OF A SNOW PACK THAT WILL KEEP TEMPS LOWER.  MOST OF THE
REMAINDER OF THE EXTENDED LOOKS QUIET WITH TEMPS SLOWLY RECOVERING.
THERE IS POTENTIAL FOR ANOTHER SYSTEM TO AFFECT THE AREA NEXT
TUESDAY INTO WEDNESDAY BUT WITH MODEL DISCREPANCIES AND THE
IMPENDING STORM THIS WEEK...I HAVE JUST PLACED POPS IN THE GRIDS
DURING THE TIMEFRAME MOST LIKELY TO SEE PRECIP.

&&

.AVIATION...18/18Z
LARGE SWATH OF LOW STRATUS CLOUDS WITH BR/-SN IS ADVANCING ACROSS
THE AREA...PRODUCING MAINLY IFR CIGS AROUND FL005 BUT WITH POCKETS
OF MVFR AROUND FL011-016...AND VSBYS ANYWHERE FROM 1SM TO 6SM. THIS
WILL AFFECT THE TERMINALS THROUGH THE AFTN AND HAVE HANDLED WITH
TEMPOS DUE TO THE VARYING CONDITIONS. BY THIS EVE WE WILL CLEAR OUT
FOR THE MOST PART WITH WINDS DIMINISHING RAPIDLY...BUT MVFR BR MAY
LINGER ALONG WITH A FEW LOW CLOUDS ESP AT KMCW/KALO. FOR THE MOST
PART THOUGH...OVNGHT THROUGH 18Z WED EXPECT VFR CONDITIONS WITH
THICKENING HIGH CLOUDS. MAIN CONCERN BEYOND THIS PERIOD WILL BE
MAJOR STORM ARRIVING AFT 18Z WED WITH POTENTIAL FOR BLIZZARD
CONDITIONS AND VERY STRONG WINDS AFT 06Z THU TO 18Z THU. PREPARE FOR
POSSIBLE TO LIKELY IMPACTS TO OPERATIONS WITH THIS STORM.

&&

.DMX WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY UNTIL 4 PM CST THIS AFTERNOON FOR BLACK
HAWK-BREMER-BUTLER-CERRO GORDO-FRANKLIN-GRUNDY-HAMILTON-HANCOCK-
HARDIN-HUMBOLDT-KOSSUTH-WINNEBAGO-WORTH-WRIGHT

WINTER STORM WATCH FROM WEDNESDAY AFTERNOON THROUGH THURSDAY
AFTERNOON FOR ADAIR-ADAMS-APPANOOSE-AUDUBON-BLACK HAWK-BOONE-
BREMER-BUTLER-CALHOUN-CARROLL-CASS-CLARKE-CRAWFORD-DALLAS-DAVIS-
DECATUR-FRANKLIN-GREENE-GRUNDY-GUTHRIE-HAMILTON-HARDIN-JASPER-LUCAS-
MADISON-MAHASKA-MARION-MARSHALL-MONROE-POLK-POWESHIEK-RINGGOLD-SAC-
STORY-TAMA-TAYLOR-UNION-WAPELLO-WARREN-WAYNE-WEBSTER-WRIGHT

&&

SHORT TERM...REV/KS/LEE
LONG TERM...BOKSA
AVIATION...LEE

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE DES MOINES IA
1128 AM CST TUE DEC 18 2012

IAZ033>035-044>050-057>062-070>075-081>086-092>097-191730-
SAC-CALHOUN-WEBSTER-CRAWFORD-CARROLL-GREENE-BOONE-STORY-MARSHALL-
TAMA-AUDUBON-GUTHRIE-DALLAS-POLK-JASPER-POWESHIEK-CASS-ADAIR-MADISON-
WARREN-MARION-MAHASKA-ADAMS-UNION-CLARKE-LUCAS-MONROE-WAPELLO-TAYLOR-
RINGGOLD-DECATUR-WAYNE-APPANOOSE-DAVIS-
1128 AM CST TUE DEC 18 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

A WINTER STORM WATCH IS IN EFFECT FOR THE AREA. PLEASE REFER TO
THE NATIONAL WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR
FURTHER DETAILS.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED HOWEVER SNOWFALL AND BLOWING
SNOW REPORTS WOULD BE APPRECIATED WEDNESDAY AFTERNOON THROUGH THURSDAY.

IAZ004-015-023-191730-
EMMET-PALO ALTO-POCAHONTAS-
1128 AM CST TUE DEC 18 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MODERATE ACCUMULATIONS OF SNOWFALL ARE POSSIBLE WEDNESDAY
AFTERNOON AND WEDNESDAY NIGHT. IN ADDITION...STRONG NORTHWEST
WINDS WILL DEVELOP WEDNESDAY NIGHT AND CREATE THE POTENTIAL FOR
BLOWING AND DRIFTING OF SNOW THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED HOWEVER SNOWFALL AND BLOWING
SNOW REPORTS WOULD BE APPRECIATED WEDNESDAY AFTERNOON THROUGH THURSDAY.

IAZ005>007-016-017-024>028-036>039-191730-
KOSSUTH-WINNEBAGO-WORTH-HANCOCK-CERRO GORDO-HUMBOLDT-WRIGHT-FRANKLIN-
BUTLER-BREMER-HAMILTON-HARDIN-GRUNDY-BLACK HAWK-
1128 AM CST TUE DEC 18 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL IOWA.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A WINTER WEATHER ADVISORY FOR SNOW AND FREEZING RAIN IS IN EFFECT
FOR THE AREA FOR THIS AFTERNOON. PLEASE REFER TO THE NATIONAL
WEATHER SERVICE WEBSITE AT WEATHER.GOV/DESMOINES FOR FURTHER
DETAILS.

.DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY

MODERATE ACCUMULATIONS OF SNOWFALL ARE POSSIBLE WEDNESDAY
AFTERNOON AND WEDNESDAY NIGHT. IN ADDITION...STRONG NORTHWEST
WINDS WILL DEVELOP WEDNESDAY NIGHT AND CREATE THE POTENTIAL FOR
BLOWING AND DRIFTING OF SNOW THROUGH THURSDAY.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION IS NOT EXPECTED HOWEVER SNOWFALL AND BLOWING
SNOW REPORTS WOULD BE APPRECIATED WEDNESDAY AFTERNOON THROUGH THURSDAY.

KS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
951 AM CST TUE DEC 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     SNOW             LAKE MILLS              43.42N 93.53W
12/18/2012  M0.8 INCH        WINNEBAGO          IA   CO-OP OBSERVER

            24 SNOWFALL MEASURED AT 7AM.

0700 AM     SNOW             NORTHWOOD               43.44N 93.22W
12/18/2012  M0.5 INCH        WORTH              IA   CO-OP OBSERVER

            24 SNOWFALL MEASURED AT 7AM.

0700 AM     SNOW             4 W SWEA CITY           43.38N 94.39W
12/18/2012  M0.8 INCH        KOSSUTH            IA   CO-OP OBSERVER

            24 SNOWFALL MEASURED AT 7AM.

&&

SKOW

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE DES MOINES IA
1146 AM CST TUE DEC 18 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1125 AM     SNOW             3 NW NORTHWOOD          43.48N 93.26W
12/18/2012  M3.5 INCH        WORTH              IA   BROADCAST MEDIA

&&

SKOW