Nazaneen Ghaffar

When making forecasts, our reporters aim to visualize severe weather possibilities rather than focus on the most dire predictions. A possible blizzard this weekend is the latest test.

The avalanche struck a guided backcountry skiing group near Truckee, Calif., near the end of a multiday trip, officials said. Six skiers have been rescued.

From flood warnings around Los Angeles to heavy snow in the Sierra, the storm systems are an abrupt shift from recent dry weather.

The greatest impact is expected across Northern California, where a pair of powerful storms are expected to begin on Sunday night and last into the week.

Forecasters said snowfall totals of one to two inches were likely Sunday night, with isolated amounts of up to three inches across New York City, northeastern New Jersey and much of Long Island.

It’s finally warming up, which means the storm will most likely bring rain instead of more dreaded ice. But forecasters warned that there may be a lot of it.

Punishing winds have combined with low temperatures to produce dangerously cold conditions across the Northeast. Forecasters say, though, that relief is on the horizon.

A fast-moving storm this weekend could drop new snow on the grimy piles that have accumulated across the city. Bitter cold will follow.

Meteorologists are watching another storm that could hit the East Coast this weekend.

People across a large section of the central and eastern United States are facing predictions for heavy snow and ice starting Friday.

One meteorologist warns that “the main ingredients” are fitting into place for a disruptive winter storm later this week.

A severe solar storm could produce a visible show from Alabama to Northern California.

A brewing storm could lead to heavy snow across the Northeast by Thursday. But a lot is still uncertain, forecasters warned.

Some of the season’s most frigid temperatures are expected this week.

After Christmas-week storms, two rounds of rainfall starting on New Year’s Eve could cause more flooding and mudslides.

Waves of atmospheric moisture could cause urban flooding and mudslides across California this week, according to the National Weather Service.

Unseasonably warm temperatures are expected across the United States this week, with many places hitting record highs and record-high lows.

A potential nor’easter could leave as much as a foot of snow in the Poconos in Pennsylvania, the Catskills in New York, and parts of Maine, Massachusetts, New Hampshire and Vermont, a forecaster said.

Forecasters say a winter storm could disrupt travel, dumping up to a foot of snow across parts of the Midwest through the holiday weekend.