Here is the National Weather service warning and latest NAM model and QPF (quantitative precipitation forecast). QPF at 10:1 ratio shows 10-13 inches for Nassau county and 15"+ for eastern long island.
URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE NEW YORK NY 430 PM EST MON JAN 10 2011 ...COASTAL STORM TO IMPACT THE AREA TUESDAY NIGHT AND WEDNESDAY... ...WINTER STORM WARNING IN EFFECT FROM 7 PM TUESDAY TO 6 PM EST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN UPTON HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 7 PM TUESDAY TO 6 PM EST WEDNESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * LOCATIONS...NEW YORK CITY...LONG ISLAND AND NORTHEAST NEW JERSEY. * HAZARDS...SNOW...HEAVY AT TIMES. * ACCUMULATIONS...7 TO 14 INCHES...WITH LOCALLY HIGHER AMOUNTS POSSIBLE. HIGHEST AMOUNTS ACROSS LONG ISLAND. * WINDS...GUSTS 25 TO 35 MPH. * VISIBILITIES...LESS THAN 1/4 MILE AT TIMES. * TIMING...HEAVIEST SNOW OCCURS AFTER MIDNIGHT TUESDAY NIGHT INTO EARLY WEDNESDAY. * IMPACTS...HAZARDOUS TRAVEL TUESDAY NIGHT AND THROUGH THE DAY WEDNESDAY. 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.
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