Mother’s Day weekend is almost here and, with June just a few weeks away, most of the United States has its sights set on summer. But, in a few of the nation’s nooks and crannies, winter has not yet departed. There are still pockets of cold and snow.

Among them? The peaks of the Rocky Mountains, as well as northern cities such as Marquette, Michigan, and Caribou, Maine. In some of these areas, winter began in early November and is still alive and well.

As a cold front drops out of Canada through the Rockies and the central United States this week, wintry weather will be reinforced where it lingers and will even briefly revisit some areas it had left. On Thursday, temperatures are forecast to be 15 to 20 degrees colder than normal from the Rockies to the Upper Peninsula of Michigan.

Let’s take a tour across the country and explore in more detail where vestiges of winter remain.

1. Caribou, Maine

New England’s northernmost city is set to enjoy two straight days of sunny warm weather but isn’t yet done with cold, dismal weather. On Monday, the National Weather Service reported that it hit 70 degrees at 2 p.m.

However, the warmth won’t last. On Friday this week, the forecast is for rain and a high of 44. That’s the average high in Washington on Groundhog Day (Feb. 2). Cool, damp weather is then expected to linger in Caribou through early next week, at least.

The upcoming stretch of unsettled weather follows a decidedly bleak April.

At least a trace of precipitation fell on 20 days last month, including 11 with snow. It wasn’t until April 22 that the city ended a record 163-day streak with at least an inch of snow on the ground. Caribou has received 164.7 inches of snow this year, third most on record.

2. Marquette, Michigan

On May’s first day, 5.4 inches of snow blanketed Marquette, setting a record for the date. The city has received 227.1 inches of snow since last July, 10th most on record.

On April 24, Marquette finally ended a 165-day streak with at least three inches of snow on the ground.

But winter isn’t finished here. The forecast for Wednesday night and Thursday this week is for cold rain, possibly mixing with snow, and a high of 37.

Trafton Gilbert stretches to dump snow over the slippery edge of a home in Sidney on March 3. Gilbert was clearing the foot of snow to make room for more in the forecast. The National Weather Service reported that farther north, Caribou measured 164.7 inches of snow for the season through April 21. Morning Sentinel photo by David Leaming

3. Arizona mountains

Some snow is even lingering in the West’s southernmost state. Arizona’s Snowbowl ski resort plans to remain open until May 19, the latest in its history. When it finally closes for the season, it will have been open for 160 days.

The resort has seen 332 inches of snow this season, the Arizona Daily Sun reports, the second most in the last two decades.

“Current temperatures on the mountain remain below freezing at night and in the 40s and 50s during the day,” the Daily Sun notes. “According to Snowbowl, 35 ski runs are open.”

4. Colorado high country

The jet stream is taking a big dip over the Central Rockies this week, inciting storminess while allowing cold, Canadian air to dive southward.

Over a foot of snow could paste some of Colorado’s high elevation peaks through Thursday. Some wet snow or a rain-snow mix could even hit Denver late Wednesday night into Thursday. Just a light slushy accumulation is anticipated.

It’s been a long, snowy season for the mountains of Colorado. Purgatory Ski Resort stayed open into May for the first time in its history (its final day was Sunday) and posted 362 inches of snow, third most on record.

At Rocky Mountain National Park, plow operators have yet to completely clear Trail Ridge Road, the highest paved road in the country, due to heavy snow in both March and April, according to SkyHiNews. Given the snow in the forecast this week, this effort is likely to be further delayed.