...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...5 TO 9 INCHES OF SNOW. A LIGHT GLAZE IS ALSO POSSIBLE THIS AFTERNOON. * TIMING...MODERATE TO HEAVY SNOW WILL FALL AT THE RATE OF 1 TO 2 INCHES PER HOUR THIS MORNING. THE SNOW WILL CHANGE TO A PERIOD OF SLEET AND FREEZING RAIN AS IT DIMINISHES IN INTENSITY THIS AFTERNOON. THE PRECIPITATION WILL CHANGE BACK TO LIGHT SNOW THIS EVENING BEFORE ENDING. * IMPACTS...MODERATE TO HEAVY SNOW WILL FALL AT THE RATE OF 1 TO 2 INCHES PER HOUR THIS MORNING. THIS WILL RESULT IN A VERY MESSY MORNING RUSH HOUR AS UNTREATED ROADS WILL BE SNOW COVERED AND SLIPPERY. 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. &&