...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 AM EST THURSDAY. * LOCATIONS...MOST OF NORTHERN MASSACHUSETTS. * HAZARD TYPES...HEAVY SNOW...MIXING WITH SLEET AND SOME FREEZING RAIN. * ACCUMULATIONS...ADDITIONAL ACCUMULATIONS OF 5 TO 9 INCHES. * TIMING...AREAS OF VERY LIGHT SNOW WILL CONTINUE THIS EVENING WITH LITTLE ADDITIONAL ACCUMULATIONS. STEADY SNOW WILL REDEVELOP BETWEEN 1 AND 5 AM FROM WEST TO EAST. THE SNOW WILL BE HEAVY AT TIMES DURING THE MORNING COMMUTE AND CONTINUE THROUGH MUCH OF THE MORNING HOURS. SNOW WILL THEN CHANGE TO SLEET AND FREEZING RAIN BY AFTERNOON. ANY MIXED PRECIPITATION WILL CHANGE BACK TO LIGHT SNOW WEDNESDAY NIGHT BEFORE ENDING. * IMPACTS...MODERATE TO HEAVY SNOW WILL IMPACT THE MORNING COMMUTE. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR ARE EXPECTED FOR MUCH OF WEDNESDAY MORNING RESULTING IN VERY HAZARDOUS TRAVEL CONDITIONS. THE HEAVY SNOW COMBINED WITH A LIGHT GLAZE COULD FURTHER STRAIN WEAKER STRUCTURES AND TREE LIMBS. A FEW POWER LINES MAY ALSO BE DOWNED...RESULTING IN ISOLATED POWER OUTAGES. * VISIBILITIES...ONE QUARTER MILE OR LESS AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING IS ISSUED WHEN AN AVERAGE OF 6 OR MORE INCHES OF SNOW IS EXPECTED IN A 12 HOUR PERIOD...OR FOR 8 OR MORE INCHES IN A 24 HOUR PERIOD. TRAVEL WILL BE SLOW AT BEST ON WELL TREATED SURFACES...AND QUITE DIFFICULT ON ANY UNPLOWED OR UNTREATED SURFACES. &&