Drivers are urged to exercise caution Friday as snow is expected to blanket the Quad-Cities.

While not living up to initial predictions, the Quad-Cities' latest winter storm is enough to warrant safer driving, said Tom Oslen, of the National Weather Service.

"Allow more time to get to your destination, and slow down," he said.

Snow accumulation Thursday night was expected to reach up to 4 inches by midnight, Mr. Olsen said. The Quad-Cities is expected to receive another inch of snow throughout Friday morning and into the afternoon, with the area under a winter weather advisory until 3 p.m.

Temperatures are anticipated to reach a high in the lower 30s today and dip to 16 degrees Friday night. Saturday is forecast to be partly sunny with a high in the upper 20s, with temperatures again in the 30s on Sunday before dropping to the lower 20s.

Mr. Olsen said the area's next bout with snow could come as early as Monday morning.

In preparation of the storm, city officials in a number of Quad-Cities communities announced snow routes would be in effect through Friday.

-- In Moline,snow routes went into effect at 4 p.m. Thursday, requiring vehicles to be moved from streets marked with "Snow Route" signs. Vehicles parked on snow routes will be towed at the owner's expense.

City officials said main streets, roads around emergency centers and schools will be plowed first, followed by residential and side streets. Snow routes will be in effect until all routes have been cleared.

City officials also reminded residents that snow must be removed from sidewalks bordering their property within 12 hours of a snowfall.

-- In Rock Island, snow routes automatically take effect once 2 inches of snow has fallen. They remain in effect until the snow has been cleared. Vehicles parked on streets posted with "Snow Route" signs are subject to a $35 ticket and may be impounded.

City officials said snow removal efforts in Rock Island will focus on primary streets and hills, with secondary priority given to school areas. Residential streets will be cleared when those areas are completed.

-- In East Moline, a snow emergency was declared Thursday afternoon. City officials asked that all vehicles be moved from city streets; those not moved will be subject to being towed.The snow emergency will continue until 24 hours after snow has stopped falling.

-- In Davenport, a snow emergency has been declared through 5 p.m. Friday. Parking is prohibited on streets posted with "Snow Route" signs, with vehicles parked on those streets subject to tickets and towing.

People who must park on city streets are advised to park on the even side of the street Friday. The Harrison Street, Redstone and River Center parking ramps also will be available for free parking during the snow emergency.

No change is expected in Friday's Solid Waste Collection, but CitiBus routes may be delayed during the early morning hours. More information on the city's parking rules, and its volunteer snow-shoveling program, are available online at cityofdavenportiowa.com.