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US Coast Guard - Petty Officer 2nd Class Charly Hengen, Associated Press
In this image provided by the U.S. Coast Guard Greg Walker, with the University of Alaska in Fairbanks, prepares an unmanned drone at the Nome causeway Jan. 10, 2012. Walker is using the UAV to gather aerial photos and video of daily ice conditions in preparation for the planned Nome fuel transfer. The camera-equipped drone looks like a smoke detector with wings and legs. It glides on 20-minute missions ranging from 10 feet to 320 feet above the ice, and its images can be instantly viewed on a tablet-type computer screen.

ANCHORAGE, Alaska — Weary Alaskans woke up to another big dump of snow on Thursday, adding to what already has been the snowiest period for Anchorage since records have been kept and causing more headaches in coastal areas already struggling to dig out.

The snow started falling shortly before midnight, and meteorologists warned residents the heaviest snowfall — up to 16 inches — could come later Thursday.

"I think people were girding their loins for a long winter," said Anchorage police Lt. Dave Park. He hasn't seen an upsurge of crime, but "by the end of March, there might be a few frustrated people."

About 150 miles to the southeast of Anchorage, the Prince William Sound community of Cordova, which has already been buried under 172 inches of snow since November, could get another 7 inches Thursday, Baines said. The picturesque fishing community has had so much snow, National Guard troops helping clear roads are running out of shovels.

In the ice-choked frozen waters of the Bering Sea, a Russian tanker loaded with 1.3 million gallons of fuel is inching toward the iced-in community of Nome, following in the path being painstakingly plowed by a Coast Guard icebreaker. Thick ice, wind and unfavorable ocean currents had the vessels making little progress, but conditions improved Wednesday and Coast Guard spokesman David Mosley says the tanker and the icebreaker are 78 miles from Nome

The city missed its final pre-winter delivery of fuel by barge when a big storm swept the region last fall. Without the delivery, Nome could run short of fuel before a barge delivery becomes possible in late spring.

The weather has put a strain on the state, which deployed the National guard to Cordova earlier this week. If it keeps up, Anchorage is on track to have the snowiest winter ever, surpassing the previous record of 132.8 inches in 1954-55, Baines said.

The weather service counts a snow year from July to June. From July 1 through Tuesday, Anchorage has received 81.3 inches of snow. Meteorologist Shaun Baines said that makes it the snowiest period for Anchorage since records have been kept.

Anchorage schools were open Thursday, but some school bus routes were canceled because of whiteout driving conditions. It mainly affects students living south of Anchorage and buses that must use the Seward Highway.

In Cordova, shovel-makers were making emergency shipments to help out. There are plenty of standard shovels around town, but they're lacking a version with a scoop that can push a cubic foot of snow or better at a time.

The new shovels cost about $50 each, and the city is paying for them with its emergency funds.

The Yukon ergo sleigh shovels, with a 26-inch scoop, have a huge advantage over regular shovels. "Trying to lift snow all day with those is pretty backbreaking," Joyce said.

"We have the National Guard right now using the standard shovel, and they're getting pretty trashed everyday — not the shovels but the Guardsmen themselves," he said.

The warmer temperatures — about 35 degrees midday Wednesday — brought another hazard to the Prince William Sound community of 2,200 people: avalanche danger.

There's one road leading out, and it was closed though it could be opened for emergency vehicles.

The city also is warning people not to stand under the eaves of their houses to clear snow off the roof for fear the snow will come down on them.

"There's a real high potential that if it does slide, they'd be buried," he said.

So far, four commercial buildings and two homes have been damaged from snow accumulation on roofs. A 24-unit apartment complex also had to be evacuated.

The current storm system is expected to be gone by Friday, but then comes another downside: colder temperatures.

Meteorologists say high temperatures this weekend should top out from 0 to 5 degrees, with lows about 10 below.

Associated Press writers Mary Pemberton in Anchorage and Doug Esser in Seattle contributed to this report.