Heavy Snow in Illinois, February 1, 2014

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1153 PM CST FRI JAN 31 2014

.DISCUSSION...
800 PM CST

ONLY MADE MINOR ADJUSTMENTS WITH THIS UPDATE. RAISED POPS AND SNOW
AMOUNTS FOR AREAS SOUTH OF I-80 TO ACCOUNT FOR THE STRONGER
BANDING OCCURRING. NOTE HOWEVER...STILL THINKING STORM TOTAL SNOW
AMOUNTS FOR AREAS SOUTH OF I-80 WERE NOT CHANGED AND STILL REMAIN
IN THE 2 TO 6 RANGE. THE BANDING IS EXPECTED TO CONTINUE THROUGH
THIS EVENING BEFORE DISSIPATING.

LOWERED POPS ACROSS THE IL/WI STATE LINE THIS EVENING AS THE SNOW
IS ADVANCING A BIT SLOWER THAN EXPECTED. NOW EXPECTING SNOW TO
REACH THE STATE LINE OVERNIGHT.

EVERYTHING ELSE REMAINS ON TRACK INCLUDING THE ONGOING HEADLINES.
NEW MODEL RUNS HAVE SHIFTED FEATURES FARTHER SOUTH AND/OR HINTED
AT LESS QPF...BUT AM HESITANT TO MAKE MAJOR CHANGES RIGHT NOW.
THEREFORE LEFT WELL ENOUGH ALONE.

JEE

//PREV DISCUSSION...

SHORT TERM...TONIGHT THROUGH SATURDAY EVENING.

301 PM...AS MENTIONED IN THE PREVIOUS DISCUSSION...WE UPGRADED THE
WINTER STORM WATCH TO A WARNING FOR MOST OF THE AREA. THE AREA IN
MY SOUTHEAST WAS LEFT AS A WATCH. HOWEVER...WE HAVE OPTED TO GO
WITH A WINTER WEATHER ADVISORY FOR THE COMBINATION OF SNOW TONIGHT
AND SOME ICE ON SATURDAY MORNING. THE MAIN CONCERNS ARE FOR THE
HEAVY SNOW...AND ITS PLACEMENT. HOWEVER...THE THREAT FOR A
POSSIBLE SIGNIFICANT ICING EVENT ACROSS PORTIONS OF THE SOUTHERN
HALF OF MY CWA IS ALSO ANOTHER MAIN FOCUS THIS AFTERNOON.

THE LATEST WATER VAPOR IMAGERY SHOWS THE MAIN MID/UPPER LEVEL PV
ANOMALY CURRENTLY ACROSS THE DESERT SOUTHWEST APPROACHING THE FOUR
CORNERS REGION. THIS DISTURBANCE IS WELL HANDLED BY THE MODELS AND
IS FORECAST TO BECOME SHEARED OUT AS IT LIFTS EAST-NORTHEASTWARD
ACROSS EASTERN IOWA BY MID DAY SATURDAY. AN ASSOCIATED SURFACE
TROUGH OF LOW PRESSURE WILL ALSO LIFT NORTHEASTWARD ALONG A
BAROCLINIC ZONE...CURRENTLY IN PLACE ACROSS CENTRAL ILLINOIS.
MOISTURE ADVECTION SHOULD RAPIDLY INCREASE THIS EVENING IN RESPONSE
TO THE DEVELOPMENT OF A 40+ KT LOW LEVEL JET ACROSS THE SOUTHERN
PLAINS AND OZARKS. THIS ENHANCED LOWER LEVEL WIND FIELD SHOULD NOSE
UP ACROSS CENTRAL ILLINOIS BY EARLY SATURDAY MORNING ALLOWING PWATS
TO INCREASE UP NEAR 1 INCH ACROSS MY SOUTHEASTERN COUNTIES...AND
AROUND 0.6 INCHES ACROSS NORTHERN ILLINOIS. SO...THIS SOUTHWEST
SYSTEM WILL HAVE AN ABUNDANCE OF MOISTURE TO WORK WITH.

LIGHT SNOW IS ONGOING ACROSS CENTRAL ILLINOIS AS OF THE TIME OF THIS
WRITING...AND THIS ACTIVITY SHOULD SLOWLY SHIFT NORTHWARD THROUGH
THE EVENING AS ISENTROPIC ASCENT BEGINS TO INCREASE ACROSS NORTHERN
ILLINOIS. SNOW INTENSITIES SHOULD INCREASE OVERNIGHT TONIGHT AND
ESPECIALLY DURING THE MORNING ON SATURDAY AS A BAND OF STRONG
FRONTOGENESIS SETS UP ACROSS ILLINOIS IN ASSOCIATION WITH THE
APPROACHING SYSTEM. SO ALL OF THE INGREDIENTS ARE IN PLACE FOR A
HEAVY PRECIP EVENT. HOWEVER...THE MAIN QUESTION IS WHERE THE
TRANSITION ZONE BETWEEN ALL SNOW TO A MIX OF FREEZING AND SLEET SETS
UP ON SATURDAY. THERE IS GOOD AGREEMENT AMOUNTS THE MODEL GUIDANCE
IN REGARDS TO THE TRACK OF THIS SYSTEM...AND THIS FAVORS THE
TRANSITION ZONE BETWEEN SNOW AND A MIX TO LINE UP SOME WHERE ALONG
AND SOUTH OF A LINE FROM NEAR STREATOR...TO NEAR JOLIET AND THROUGH
SOUTHERN COOK COUNTY ON SATURDAY.

PERIODS OF SNOW WILL BE THE MAIN PRECIP TYPE TONIGHT.
HOWEVER...WARMER AIR WILL QUICKLY MOVE NORTHWARD ACROSS CENTRAL
ILLINOIS AND INDIANA VERY LATE TONIGHT IN ASSOCIATION WITH THE
DEVELOPMENT OF THE LOW LEVEL JET MENTIONED ABOVE. THIS COULD ALLOW
MY FAR SOUTHERN AREAS TO BEGIN TO MIX WITH SLEET AND FREEZING RAIN
JUST PRIOR TO DAYBREAK SATURDAY. DURING THE MORNING IT APPEARS THIS
LINE WILL QUICKLY AS FAR NORTH AS THE SOUTHERN SECTIONS OF
CHICAGO...AND THUS AREAS FROM LIVINGSTON...KANKAKEE...AND SOUTHERN
SECTIONS OF WILL AND GRUNDY COUNTIES IN ILLINOIS...AS WELL AS PORTER
AND LAKE COUNTIES IN INDIANA LOOK TO BE SUSCEPTIBLE TO SOME
SIGNIFICANT ICE ACCUMULATIONS...IN EXCESS OF 0.25 INCHES. THESE
AREAS WERE UPGRADE TO THE WARNING EARLIER TODAY FOR THIS REASON. I
CHOOSE NOT TO GO WITH AN ICE STORM WARNING SINCE PERIODS OF SNOW
WILL ALSO BE AN ISSUE.

FARTHER SOUTH AND EAST ACROSS FORD...IROQUOIS...NEWTON...JASPER AND
BENTON COUNTIES...I CHOSE TO GO WITH AN ADVISORY FOR ICE AND SNOW
ACCUMULATIONS. THESE AREAS WILL LIKELY EXPERIENCE SOME LIGHT SNOW
ACCUMULATIONS TONIGHT...AND THEN SOME MINOR ICE ACCUMULATIONS EARLY
SUNDAY MORNING. HOWEVER...IT APPEARS THAT THE SURFACE WARM FRONT
WILL QUICKLY LIFT OVER THESE AREAS EARLY IN THE MORNING...ALLOWING
TEMPERATURES TO JUMP ABOVE FREEZING. AS SUCH...IT APPEARS THAT THE
HEAVIEST PRECIPITATION WITH THIS EVENT WILL FALL IN THE FORM OF RAIN
IN THESE AREAS.

AS MENTIONED IN THE PREVIOUS DISCUSSION FROM THIS MORNING...IT
APPEARS THAT THIS WILL BE A FAVORABLE SETUP FOR SOME PERIODS OF
HEAVY SNOW...ESPECIALLY SATURDAY MORNING...MAINLY NORTH OF
INTERSTATE 80. CROSS SECTIONS INDICATE THE STRONG BAND OF MID LEVEL
FRONTOGENESIS WITHIN PROXIMITY TO A DECENT LAYER OF NEGATIVE EPV.
SIMILARLY...MODEL SOUNDINGS CONTINUE TO SHOW VERY STEEP MID LEVEL
LAPSE RATES THROUGH THE DGZ...WITH EVEN A LITTLE CAPE NOTED FOR
PARCELS LIFTED ABOVE 650 MB. GIVEN THE STRONG FORCING FOR ASCENT
WITHIN THE BAND OF STRONG FGEN...WE COULD SEE SOME SNOW RATES AROUND
AN INCH PER HOUR FOR AT LEAST A COUPLE HOURS SATURDAY MORNING AND
PERHAPS SOME LIGHTNING AS WELL. ADDITIONALLY...THE LIKELIHOOD OF A
NEARLY ISOTHERMAL LAYER BETWEEN THE SURFACE AND 700 MB AROUND 0 TO
-4 DEGREES CELSIUS...SUGGESTS THE GOOD POSSIBILITY OF GOOD
AGGREGATION OF SNOW FLAKES...WHICH WOULD ALSO SUPPORT HEAVY SNOW.

OVERALL...IT STILL APPEARS THAT A GOOD 6 TO 10 INCHES WILL FALL
WITHIN HEAVIEST BAND OF SNOW IN THE WARNING AREA ALONG AND NORTH OF
I-80...ESPECIALLY IN NORTHERN ILLINOIS. SLIGHTLY LIGHT AMOUNTS ARE
EXPECTED ACROSS FAR NORTH CENTRAL ILLINOIS. THE SNOW SHOULD ABATE
FROM WEST TO EAST ACROSS THE AREA DURING THE AFTERNOON HOURS. AREAS
SOUTH APPEAR THAT THEY WILL TRANSITION BACK TO A PERIOD OF SNOW LATE
SATURDAY AFTERNOON/EARLY SATURDAY EVENING BEFORE THE PRECIP ENDS.

KJB

LONG TERM...SATURDAY NIGHT THROUGH FRIDAY.

301 PM...MAIN FORECAST CONCERN/CHALLENGE IN THE EXTENDED IS
ANOTHER STORM SYSTEM TO AFFECT THE AREA TUESDAY/WEDNESDAY WITH THE
POTENTIAL FOR SEVERAL INCHES OF SNOW ACCUMULATION.

HIGH PRESSURE WILL BE SPREADING ACROSS THE REGION SATURDAY NIGHT
INTO SUNDAY. SKIES WILL BE CLEARING THROUGH THE NIGHT BUT SOME
UNCERTAINTY REGARDING JUST HOW FAST CLOUDS WILL CLEAR THE AREA AND
THIS WILL HAVE LARGE IMPACT ON TEMPS. HAVE MAINTAINED TEMPS AT OR
ABOVE ZERO FOR THE ENTIRE AREA BUT WITH CLEARING SKIES AND THEN
THE POTENTIAL FOR LIGHTER WINDS...LOWS COULD EASILY DIP BELOW ZERO
ACROSS THE NORTHWESTERN CWA. WITH FULL SUNSHINE SUNDAY...HIGHS
RECOVER SOME BUT STILL QUITE COLD FOR EARLY FEBRUARY WITH TEMPS
ONLY IN THE 10 TO 15 DEGREE RANGE. WITH THE HIGH CENTERED OVER THE
AREA SUNDAY NIGHT...LOWS WILL LIKELY TANK AND MAY STILL BE TOO
WARM WITH LOWS 5 TO 10 BELOW ZERO. WINDS SHOULD BE LIGHT ENOUGH TO
PREVENT WIND CHILLS FROM REACHING ADVISORY CRITERIA.

THE HIGH SLOWLY SHIFTS NORTHEAST AND THEN SPREADS OUT FROM ONTARIO
TO NEW ENGLAND TUESDAY. NEW LOW PRESSURE WILL DEVELOP NEAR THE
ARKLATEX REGION TUESDAY MORNING AND MOVE NORTHEAST ACROSS THE OHIO
VALLEY TUESDAY NIGHT...REACHING NEAR LAKE ONTARIO MIDDAY
WEDNESDAY. THIS GENERAL TRACK HAS BEEN FAIRLY CONSISTENT FOR THE
PAST FEW DAYS. AS AN UPPER TROUGH DIGS ACROSS THE WESTERN U.S.
MONDAY INTO TUESDAY...A DISTURBANCE SHIFTS EAST ACROSS THE PLAINS
WHICH ARRIVES TUESDAY BRINGING THE START OF THE SNOW. AS THE
SOUTHERN LOW LIFTS NORTHEAST...IT MAINTAINS A BROAD AREA OF LIGHT
TO MODERATE SNOW TUESDAY NIGHT INTO WEDNESDAY MORNING ACROSS THE
WESTERN/SOUTHERN LAKES REGION. GIVEN THE CONTINUED CONTINUITY
WITH THIS SOLUTION...HAVE BUMPED POPS UP TO CATEGORICAL DURING
THIS TIME. ITS A BIT EARLY FOR SPECIFICS INCLUDING AMOUNTS...BUT
SEVERAL INCHES OF SNOW APPEAR POSSIBLE. THERMAL PROFILES SHOW
PRECIP SHOULD REMAIN SNOW ACROSS THE ENTIRE CWA WITH NO MIXED
PRECIP EXPECTED.

OVERALL SPEED AND THUS THE BACK SIDE/END TO THE PRECIP IS MORE
UNCERTAIN AS THE LOW DEEPENS AND THE GRADIENT TIGHTENS AGAINST THE
HIGH TO THE NORTHEAST AND HAVE CONTINUE HIGH CHANCE POPS INTO
WEDNESDAY MORNING WITH PRECIP LIKELY ENDING FAIRLY QUICKLY FROM
WEDNESDAY AFTERNOON INTO WEDNESDAY EVENING. THE TIGHTER GRADIENT
WILL LIKELY LEAD TO INCREASING NORTHERLY WINDS. SIMILAR TO SNOW
AMOUNTS...A BIT EARLY FOR SPECIFICS BUT WINDS 15-25 MPH WITH
HIGHER GUSTS ARE CERTAINLY REASONABLE...PERHAPS A PERIOD OF
STRONGER WINDS/GUSTS TUESDAY EVENING/TUESDAY NIGHT.

BEHIND THIS SYSTEM...ANOTHER LARGE HIGH BUILDS ACROSS THE PLAINS
AND LAKES REGION WITH TEMPS WELL BELOW NORMAL...LOWS LIKELY IN THE
10 BELOW RANGE BOTH WEDNESDAY NIGHT/THURSDAY MORNING AND AGAIN
THURSDAY NIGHT/FRIDAY MORNING WITH HIGHS THURSDAY STRUGGLING INTO
THE SINGLE DIGITS. GFS/ECMWF BOTH SHOW SNOW SPREADING BACK ACROSS
THE REGION FRIDAY INTO FRIDAY NIGHT NEXT WEEK AND HAVE LOW CHANCE
POPS FOR THIS TIME PERIOD BUT QUITE A BIT OF UNCERTAINTY REGARDING
HOW FAST THIS MOISTURE RETURNS GIVEN THE SURFACE HIGH IN PLACE AT
THAT TIME. CMS

&&

.AVIATION...

//ORD AND MDW CONCERNS...UPDATED 06Z...

* PERIODS OF IFR SNOW OVERNIGHT.
* MODERATE TO OCCASIONALLY HEAVY SNOW BEGINNING AROUND 11Z-12Z AND
  PERSISTING FOR AT LEAST SEVERAL HOURS...THEN LIGHT TO MODERATE
  SNOW INTO THE AFTERNOON.
* NORTHEAST WINDS INCREASING TO AROUND 10 KT BY MIDDAY/EARLY
  AFTERNOON...THEN BECOMING NORTHWEST AND INCREASING FURTHER.

//DISCUSSION...UPDATED 06Z...

THE PRIMARY WEATHER SYSTEM OF INTEREST IS MOVING EAST INTO WESTERN
KS AROUND 06Z. A BROAD MOISTURE PLUME AHEAD OF THIS WILL CONTINUE
TO SUPPORT MAINLY LIGHT SNOW THROUGH DAWN. THEN A PERIOD OF
MODERATE TO HEAVY SNOW ASSOCIATED WITH THE FORCING IMMEDIATELY
AHEAD OF THE UPPER WAVE WILL MOVE OVER THE AREA. DEEP MOISTURE AND
EVEN SOME SLANTWISE INSTABILITY WITH THIS IS CREATING 1/4SM
VISIBILITY IN SNOW AT MANHATTAN KS AT 05Z ALONG WITH SPORADIC
LIGHTNING STRIKES. MOST HIGH RESOLUTION GUIDANCE SUPPORTS THIS
MODERATE TO OCCASIONAL HEAVY SNOW EVOLVING OVER THE AREA BETWEEN
11Z-16Z...AND EVEN SOME LOWER VISIBILITY TO 1/4SM AT TIMES. WHILE
THERE HAS BEEN SOMEWHAT OF A SHIFT SOUTH IN LARGER SCALE MASS
FEATURES WITH THIS SYSTEM...THE IDEA OF 1/4SM TEMPORARILY
HAPPENING AT THE CHICAGO AREA AIRPORTS IS STILL NOT MUCH SHY OF 50
PERCENT. SO HAVE CONTINUED MENTION BUT JUST SHORTENED THE TEMPO
TIME. AS THE UPPER SYSTEM MOVES OVER THE AREA SNOW RATES COULD
UNDULATE QUITE A BIT LATE THIS MORNING AND EARLY AFTERNOON...SO
TOUGH TO GET A FEEL BUT CERTAINLY LOOKS LIKE IFR VISBY/CIG SHOULD
PREVAIL WITH ACCUMULATING SNOW...SO PLENTY OF IMPACTS. THE SNOW
RATES WILL TAPER SLOWLY THIS AFTERNOON AS FORCING AND DEEPER
MOISTURE DEPART WITH THE SYSTEM CIRCULATION.

THE VARIABLE WINDS AT 06Z AHEAD OF THE DEVELOPING SURFACE LOW
WILL BECOME ENE TO NE BY DAYBREAK AND THEN GRADUALLY PICK UP IN
SPEED AS THE PRESSURE GRADIENT SLOWLY TIGHTENS. THESE WINDS SHOULD
APPROACH 10 KT BY 17Z OR SO...BUT MAY NOT TOP THAT UNTIL CLOSER TO
MID AFTERNOON WHICH IS WHEN THEY WILL BACK TO NNW.

//ORD AND MDW CONFIDENCE...UPDATED 06Z...

* MEDIUM IN TIMING OF MODERATE TO HEAVY SNOW. LOW IN WHETHER
  VISIBILITY WILL REACH 1/4SM...HOWEVER IF IT OCCURS...THE EARLY
  TO MID MORNING REMAINS THE MOST FAVORED TIME.
* HIGH THAT IFR CIGS WILL PREVAIL MUCH OF SATURDAY.
* MEDIUM TO HIGH IN END TIME OF SNOW.
* HIGH ON WIND SPEED REMAINING BELOW 10 KT THROUGH 17Z...THEN
  MEDIUM ON TIMING OF WIND SHIFT TO NNW AT 21Z.

//OUTLOOK FOR ORD/MDW FOR 12Z SUNDAY-12Z FRIDAY...UPDATED 00Z...

SUNDAY THROUGH MONDAY NIGHT...PREDOMINANTLY VFR.

TUESDAY THROUGH EARLY WEDNESDAY...A PERIOD OF SNOW AND IFR LIKELY.

LATE WEDNESDAY THROUGH THURSDAY...PREDOMINANTLY VFR.

MTF/IZZI

&&

.MARINE...
255 PM CST

HIGH PRESSURE CENTERED OVER EASTERN IOWA WILL MOVE ACROSS LAKE
MICHIGAN THIS EVENING AND THEN MERGE WITH ANOTHER AREA OF HIGH
PRESSURE OVER THE MID ATLANTIC REGION. WITH HIGH PRESSURE THE
DOMINANT FEATURE OVER THE REGION...WINDS AND WAVES WILL BE MUCH
CALMER THAN WHAT HAS BEEN OBSERVED THROUGH MUCH OF THE PAST
SEVERAL WEEK. ALSO...EXTENSIVE BROKEN ICE COVER OVER THE FAR
SOUTH END OF THE LAKE WILL KEEP WAVES NEARLY CALM WHILE SOLID ICE
OVER THE NORTH END OF THE LAKE WILL ELIMINATE ANY WAVE ACTION.
MUCH OF THE OPEN WATERS THROUGH THE MIDDLE OF THE LAKE WILL STILL
SEE WAVE ACTION AND INCREASE TO 5 TO 8 FT AS MODERATE...GENERALLY
NORTHWEST TO WEST WINDS PREVAIL FROM SATURDAY NIGHT THROUGH EARLY
NEXT WEEK. AS DEEPENING LOW PRESSURE TRACKS THROUGH THE OHIO
VALLEY AND STRONG HIGH PRESSURE BUILDS ACROSS THE NORTHERN AND
CENTRAL PLAINS...STRENGTHENING NORTH WINDS WILL DEVELOP...POSSIBLY
APPROACHING GALE FORCE BY WEDNESDAY OR THURSDAY.

KREIN

&&

.LOT WATCHES/WARNINGS/ADVISORIES...
IL...WINTER STORM WARNING...ILZ005-ILZ006-ILZ008-ILZ010-ILZ011-ILZ012-
     ILZ013-ILZ014-ILZ019-ILZ020-ILZ021-ILZ022-ILZ023-ILZ032
     UNTIL 6 PM SATURDAY.

     WINTER WEATHER ADVISORY...ILZ003-ILZ004-ILZ033-ILZ039 UNTIL 6 PM
     SATURDAY.

IN...WINTER STORM WARNING...INZ001-INZ002 UNTIL 6 PM SATURDAY.

     WINTER WEATHER ADVISORY...INZ010-INZ011-INZ019 UNTIL 6 PM
     SATURDAY.

LM...NONE.
&&

VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
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WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGO

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
346 PM CST FRI JAN 31 2014

ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
012200-
WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE-
DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON-
IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON-
346 PM CST FRI JAN 31 2014 /446 PM EST FRI JAN 31 2014/

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.

.DAY ONE...TONIGHT.

SNOW WILL CONTINUE TO SPREAD ACROSS THE AREA THIS EVENING AND
OVERNIGHT WITH A MIXTURE OF SLEET AND FREEZING RAIN POSSIBLE SOUTH
OF A LINE FROM PONTIAC TO VALPARAISO. SEVERAL INCHES OF SNOW
ACCUMULATION IS POSSIBLE.

LOCALIZED RIVER FLOODING WILL REMAIN POSSIBLE...ESPECIALLY NEAR
ANY ISOLATED ICE JAMS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

SNOW...HEAVY AT TIMES...IS EXPECTED ALONG AND NORTH OF INTERSTATE
80 SATURDAY MORNING WITH A MIXTURE OF SNOW...SLEET AND FREEZING
RAIN SOUTH OF INTERSTATE 80. SOME OF THESE AREAS MAY SEE
SIGNIFICANT ICE ACCUMULATIONS. SEVERAL INCHES OF SNOW ACCUMULATION
ARE EXPECTED ALONG AND NORTH OF INTERSTATE 80. THE PRECIPITATION
WILL END BY EARLY SATURDAY EVENING.

ANOTHER STORM SYSTEM IS EXPECTED TO MOVE ACROSS THE OHIO VALLEY
REGION NEXT TUESDAY AND WEDNESDAY WHICH MAY PRODUCE ACCUMULATING
SNOW ACROSS THE AREA.

LOCALIZED RIVER FLOODING WILL REMAIN POSSIBLE...ESPECIALLY NEAR
ISOLATED ICE JAMS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NECESSARY THROUGH TONIGHT.

&&

LMZ740>745-012200-
WINTHROP HARBOR TO WILMETTE HARBOR-
WILMETTE HARBOR TO NORTHERLY ISLAND-
NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY-
GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY-
346 PM CST FRI JAN 31 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

A PERIOD OF WINDS AND WAVES HAZARDOUS TO SMALL CRAFT IS POSSIBLE
SATURDAY AFTERNOON THROUGH SUNDAY MORNING.

&&

LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-012200-
LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE
MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH
FOX ISLAND 5 NM OFFSHORE-
LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI-
LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE
TO MID LAKE-
LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM
OFFSHORE TO MID LAKE-
LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO
MID LAKE-
LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID
LAKE-
LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO
MID LAKE-
346 PM CST FRI JAN 31 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

&&

VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)

FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
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PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1032 PM CST FRI JAN 31 2014

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

1030 PM     SNOW             PEOTONE                 41.33N 87.80W
01/31/2014  M1.5 INCH        WILL               IL   CO-OP OBSERVER

            1.5 INCHES OF SNOW THUS FAR.

&&

JEE

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1211 AM CST SAT FEB 01 2014

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

1120 PM     SNOW             MILFORD                 40.63N 87.70W
01/31/2014  E3.0 INCH        IROQUOIS           IL   PUBLIC

1120 PM     SNOW             MORRIS                  41.37N 88.43W
01/31/2014  E1.5 INCH        GRUNDY             IL   PUBLIC

1120 PM     SNOW             MARSEILLES              41.33N 88.69W
01/31/2014  E1.0 INCH        LA SALLE           IL   PUBLIC

1200 AM     SNOW             ROMEOVILLE              41.65N 88.09W
02/01/2014  M0.6 INCH        WILL               IL   OFFICIAL NWS OBS

            TOTAL THUS FAR. 0.05 LIQUID EQUIVALENT.

1200 AM     SNOW             MIDWAY AIRPORT          41.78N 87.75W
02/01/2014  M0.5 INCH        COOK               IL   CO-OP OBSERVER

1200 AM     SNOW             OHARE AIRPORT           41.98N 87.90W
02/01/2014  M0.2 INCH        COOK               IL   OFFICIAL NWS OBS

&&

MTF

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1212 AM CST SAT FEB 01 2014

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

1200 AM     SNOW             3 SW MIDWAY AIRPORT     41.75N 87.79W
02/01/2014  M0.5 INCH        COOK               IL   CO-OP OBSERVER

&&

MTF

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1213 AM CST SAT FEB 01 2014

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

1030 PM     SNOW             PEOTONE                 41.33N 87.80W
01/31/2014  M1.5 INCH        WILL               IL   CO-OP OBSERVER

            1.5 INCHES OF SNOW THUS FAR.

1120 PM     SNOW             MILFORD                 40.63N 87.70W
01/31/2014  E3.0 INCH        IROQUOIS           IL   PUBLIC

1120 PM     SNOW             MORRIS                  41.37N 88.43W
01/31/2014  E1.5 INCH        GRUNDY             IL   PUBLIC

1120 PM     SNOW             MARSEILLES              41.33N 88.69W
01/31/2014  E1.0 INCH        LA SALLE           IL   PUBLIC

1200 AM     SNOW             3 SW MIDWAY AIRPORT     41.75N 87.79W
02/01/2014  M0.5 INCH        COOK               IL   CO-OP OBSERVER

1200 AM     SNOW             OHARE AIRPORT           41.98N 87.90W
02/01/2014  M0.2 INCH        COOK               IL   OFFICIAL NWS OBS

1200 AM     SNOW             ROMEOVILLE              41.65N 88.09W
02/01/2014  M0.6 INCH        WILL               IL   OFFICIAL NWS OBS

            TOTAL THUS FAR. 0.05 LIQUID EQUIVALENT.

&&

MTF