Mercer Island will likely see the first snow of the season on Tuesday, though forecasters predict little or no snow will stick on local sidewalks or streets.
At 9:11 p.m. Monday night, the NWS updated its forecast with a Winter Weather Advisory for lowland areas east of the Puget Sound. Snow levels Monday night on Mercer Island are expected at 200 feet, and a rain-snow mix is expected to turn to snow by 4 a.m. with temperatures dropping to near freezing.
Forecasters warn that winter driving conditions are possible during the commute on Tuesday morning and evening. Motorists should use caution and allow for extra time traveling to and from work due to the snow.
School schedules may also be affected by the snow. Check Schoolreport.org for the latest updates on school opening and closing times due to the winter weather.
While little or no accumulation is likely on Tuesday, a mix of snow and rain will continue until 11 a.m., then change over to rain until 5 p.m., when more snowfall is possible. A high temperature on Tuesday of 39F is forecast.
Tuesday night's forecast also calls for snow, but only at Mercer Island's highest elevations at or above 400 feet, with a low of 35F.
Cool temperatures, with highs in the low 40s and lows in the mid 30s, are expected to continue for the next week.
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From today's NWS Winter Weather Advisory:
URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SEATTLE WA 911 PM PST MON DEC 17 2012
LOWLAND SNOW SHOWERS ARE POSSIBLE TONIGHT WITH TEMPERATURES IN THE LOWER 30S AND SNOW LEVELS ONLY A FEW HUNDRED FEET ABOVE SEA LEVEL. SHOWERS WILL DECREASE TUESDAY MORNING WITH TEMPERATURES RISING INTO THE UPPER 30S TO LOWER 40S.
WAZ505>507-510-181315- /O.CON.KSEW.WW.Y.0045.121218T0600Z-121218T2000Z/ EAST PUGET SOUND LOWLANDS-WESTERN SKAGIT COUNTY- EVERETT AND VICINITY-ADMIRALTY INLET AREA- 911 PM PST MON DEC 17 2012
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON PST TUESDAY...
* SOME AFFECTED LOCATIONS...STANWOOD...OAK HARBOR...EVERETT... GOLD BAR...MILL CREEK...LAKE STEVENS...AND CARNATION. *
SNOW ACCUMULATIONS...UP TO 3 INCHES. THERE COULD BE LOCALLY HIGHER AMOUNTS IF A STRONG CONVERGENCE ZONE DEVELOPS.
* MAIN IMPACT...WINTER DRIVING CONDITIONS ARE POSSIBLE DURING THE TUESDAY MORNING COMMUTE. THUS RESIDENTS SHOULD BE PREPARED TO LEAVE FOR WORK EARLIER THAN NORMAL ON TUESDAY TO ALLOW FOR POSSIBLE DELAYS DUE TO SNOW.
PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY IS ISSUED FOR A VARIETY OF WINTER WEATHER CONDITIONS SUCH AS FREEZING RAIN AND SNOW OCCURRING AT THE SAME TIME. WHILE THE WEATHER WILL BE SIGNIFICANT...THE WORD ADVISORY MEANS THAT LIFE THREATENING WINTER WEATHER IS NOT EXPECTED.