WINTER WEATHER ADVISORY
Issue Date: 906 PM CST WED DEC 23 2009
Expiration: 800 AM CST THU DEC 24 2009

...THE WINTER MIX OF PRECIPITATION HAS BECOME FREEZING RAIN AND
DRIZZLE IN NORTH CENTRAL ILLINOIS...NORTHEAST ILLINOIS AND
NORTHWEST INDIANA...
.WARM AIR MOVING NORTH WILL OVERRIDE COLD AIR OVER NORTH CENTRAL
ILLINOIS...NORTHEAST ILLINOIS AND NORTHWEST INDIANA. THIS IS
AHEAD OF A WARM FRONT THAT WILL MOVE THROUGH THE REGION THURSDAY.
ILZ014-241115-
/O.NEW.KLOT.WW.Y.0015.091224T0305Z-091224T1400Z/
COOK-
INCLUDING THE CITY OF...CHICAGO
905 PM CST WED DEC 23 2009
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 8 AM CST THURSDAY...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A WINTER
WEATHER ADVISORY FOR LIGHT SLEET AND LIGHT FREEZING RAIN...WHICH
IS IN EFFECT UNTIL 8 AM CST THURSDAY.
* TIMING...SLEET AND SOME FREEZING RAIN WILL CONTINUE THROUGH THE
  REST OF THE NIGHT.
* ACCUMULATIONS...SOME LOCATIONS MAY RECEIVE UP TO TENTH OF AN
  INCH OF ICE. ESPECIALLY AWAY FROM LAKE MICHIGAN.
* HAZARDS...SOME ICE ACCUMULATIONS.
* IMPACTS...THERE WILL BE HAZARDOUS DRIVING CONDITIONS. SOME ICE
  MAY BUILD ON STRUCTURES LIKE TALL BUILDINGS AND ANTENNAS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WINTER WEATHER ADVISORY MEANS THAT A COMBINATION OF SLEET...OR
FREEZING RAIN WILL RESULT IN SLIPPERY ROADWAYS AND CAUSE TRAVEL
DIFFICULTIES. BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS AND USE
CAUTION WHILE TRAVELING.
&&
$$

HAZARDOUS WEATHER OUTLOOK
Issue Date: 428 PM CST WED DEC 23 2009
Expiration: 415 PM CST THU DEC 24 2009

/504 PM EST WED DEC 23 2009/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...TONIGHT.
PRECIPITATION WILL CONTINUE ACROSS THE ENTIRE
OUTLOOK AREA. PRECIPITATION SOUTH OF I-80 IS EXPECTED TO
PRIMARILY BE IN THE FORM OF RAIN...THOUGH A FEW POCKETS OF
FREEZING RAIN...SLEET...OR SNOW CAN'T BE RULED OUT. NORTH OF
I-80...FREEZING RAIN WILL MIX WITH SLEET AND PERHAPS A FEW SNOW
FLAKES THROUGH THE OVERNIGHT HOURS. TEMPERATURES ARE EXPECTED TO
REMAIN NEARLY STEADY THROUGH THE EVENING...WITH THOSE LOCATIONS
THAT HAVE NOT YET REACHED THE FREEZING MARK LIKELY NOT DOING SO
THROUGH THE OVERNIGHT HOURS.
WHILE THE EXACT TIMING OF TEMPERATURES RISING ABOVE FREEZING IS
UNCERTAIN AT ANY GIVEN LOCATION...IT DOES APPEAR THAT BY THURSDAY
AFTERNOON...SURFACE TEMPERATURES WILL HAVE TRANSITIONED TO ABOVE
FREEZING AT MOST LOCATIONS...CHANGING PRECIPITATION OVER TO RAIN.
WINTER WEATHER ADVISORIES ARE IN EFFECT FOR PORTIONS OF THE OUTLOOK
AREA. PLEASE REFERENCE THE LATEST WINTER WEATHER STATEMENTS FOR
THE LATEST FORECAST INFORMATION...AS WELL AS ANY CHANGES TO THE
CURRENT ADVISORIES IN EFFECT...ALONG WITH ANY ADDITIONAL
WATCES...WARNINGS...OR ADVISORIES THAT MAY BE ISSUED.
.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.
PRECIPITATION WILL TRANSITION TO ALL RAIN DURING THE LATE MORNING
AND EARLY AFTERNOON ACROSS THE OUTLOOK AREA. PERIODS OF MODERATE TO
HEAVY RAINFALL WILL BE LIKELY THROUGHOUT THE DAY.
GIVEN THE POTENTIALLY HEAVY RAINFALL...COMBINED WITH MELTING SNOW
AND FROZEN GROUND...FLOODING OF RIVERS AND LOW LYING AREAS
APPEARS LIKELY.
COLDER AIR WILL THEN CIRCULATE AROUND THE STORM CENTER ALLOWING
PRECIPITATION TO CHANGE BACK TO LIGHT SNOW OR SNOW SHOWERS ON
CHRISTMAS DAY...WITH PERIODS OF LIGHT SNOW CONTINUING INTO SUNDAY
AS THE LOW CENTER DRIFTS OFF ACROSS THE MIDWEST.
A FLOOD WATCH HAS BEEN ISSUED FOR THE OUTLOOK AREA.
.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.
HOWEVER...SPOTTERS ARE ENCOURAGED TO REPORT ANY ACCUMULATIONS OF
SLEET OR FREEZING RAIN...AS WELL AS ANY OBSERVED FLOODING...TO THE
NATIONAL WEATHER SERVICE IN CHICAGO.
&&
COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO
WEBPAGE: WEATHER.GOV/CHICAGO
$$

FLOOD WATCH
Issue Date: 345 AM CST WED DEC 23 2009
Expiration: 600 AM CST FRI DEC 25 2009

...HEAVY RAIN AND FLOODING POSSIBLE THURSDAY AFTERNOON THROUGH
FRIDAY MORNING...
.A DEVELOPING WINTER STORM OVER THE SOUTHERN PLAINS WILL MOVE
NORTH TO IOWA BY FRIDAY MORNING. AFTER A PERIOD OF WINTRY
PRECIPITATION WEDNESDAY AFTERNOON INTO THURSDAY MORNING...WARM
MOIST AIR WILL SPREAD NORTH ACROSS THE AREA WITH PERIODS OF
HEAVY RAIN EXPECTED THURSDAY AFTERNOON AND THURSDAY NIGHT.
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
231745-
/O.NEW.KLOT.FA.A.0003.091224T1800Z-091225T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-DUPAGE-COOK-
LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-IROQUOIS-FORD-
LAKE IN-PORTER-NEWTON-JASPER-BENTON-
INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK...
WAUKEGAN...OREGON...DIXON...DEKALB...AURORA...WHEATON...CHICAGO...
OTTAWA...OSWEGO...MORRIS...JOLIET...KANKAKEE...PONTIAC...
WATSEKA...PAXTON...GARY...VALPARAISO...MOROCCO...RENSSELAER...
FOWLER
345 AM CST WED DEC 23 2009 /445 AM EST WED DEC 23 2009/
...FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH LATE
THURSDAY NIGHT...
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A
* FLOOD WATCH FOR PORTIONS OF ILLINOIS AND INDIANA...INCLUDING
THE FOLLOWING AREAS...IN ILLINOIS...BOONE...COOK...DE KALB...
DUPAGE...FORD...GRUNDY...IROQUOIS...KANE...KANKAKEE...
KENDALL...LA SALLE...LAKE IL...LEE...LIVINGSTON...MCHENRY...
OGLE...WILL AND WINNEBAGO. IN INDIANA...BENTON...JASPER...LAKE
IN...NEWTON AND PORTER.
* FROM THURSDAY AFTERNOON THROUGH LATE THURSDAY NIGHT.
* HEAVY RAIN IS EXPECTED TO DEVELOP ACROSS NORTHERN ILLINOIS AND
NORTHWEST INDIANA BY THURSDAY AFTERNOON AND CONTINUE THROUGH
EARLY FRIDAY MORNING. STORM TOTAL RAINFALL AMOUNTS OF 1 TO 2
INCHES WILL BE COMMON. SOME AREAS MAY RECEIVE AS MUCH AS 3
INCHES BY FRIDAY MORNING.
* THE DEPTH OF THE CURRENT SNOW PACK RANGES FROM 5 TO 8 INCHES
OVER NORTHWEST ILLINOIS TO 1 TO 3 INCHES ACROSS NORTHWEST
INDIANA. AS THIS SNOW MELTS...COMBINED WITH THE EXPECTED HEAVY
RAIN...AND FROZEN GROUND CONDITIONS...RAPID RUNOFF AND RISES ON
AREA RIVERS ARE EXPECTED. SOME RIVERS MAY REACH OR EXCEED FLOOD
STAGE. FLOODING OF LOW LYING AND FLOOD PRONE AREAS WILL ALSO BE
POSSIBLE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON
CURRENT FORECASTS.
YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE
FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE
PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP.
$$