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NWS Riverton has issued Winter Storm Warnings for five zones in Wyoming, effective from 6 PM Sunday through 6 PM Monday MDT. Up to 16 inches of snow is forecast for the Wind River Mountains East, and a stretch of Interstate 80 in East Sweetwater County is explicitly named in the impacts. Wind gusts up to 50 mph are expected across the warning zones. The Five Zones Under Winter Storm Warning Wind River Mountains East is the heaviest hit, with 8 to 16 inches of snow possible and gusts to 50 mph.

The late-season Pacific storm that hit Wyoming overnight has now expanded into Colorado. NWS Denver has issued a Winter Storm Warning for the high terrain of northern Colorado above 9,000 feet, with up to 18 inches of snow forecast for Rocky Mountain National Park and the Medicine Bow Range through 9 PM Monday. A separate Winter Weather Advisory covers the I-70 corridor and the major mountain passes south of the warning zone, where 4 to 12 inches is expected. NWS Denver explicitly notes that "th

A late-season Pacific trough is hammering the Western United States today, Saturday May 16, 2026, with up to 20 inches of snow forecast for the highest elevations of the Wyoming mountains and damaging wind gusts to 70 mph stacking against I-5, US 395, and the Mojave Desert highway grid. NWS Riverton has issued five Winter Storm Warnings for Sunday night into Monday, and the Weather Prediction Center extended discussion flags the trough delivering a round of late-season snow across the higher ele

Late April is not when you expect to be digging out, and yet here we are. A heavy wet storm has parked itself over the Northern Rockies, and by sunrise Friday parts of Montana and Wyoming are looking at snow totals closer to February numbers than anything spring should be producing. I-90 is compromised across most of western Montana, while Monida Pass on I-15 is in the same alert. Up on US-212 through Cooke City and US-14 through the Bighorns, the forecast word is whiteout. The shortest version:

Wyoming's late-season storm is in its final and most damaging phase. The Weather Prediction Center had flagged this storm as a high-probability winter weather event days in advance. As of Monday morning, nine zones remain under Winter Storm Warning from NWS Cheyenne and NWS Riverton until 6 PM MDT tonight, with up to 20 inches of snow still forecast for the Snowy Range and 50 mph wind gusts across the I-80 corridor. NWS Cheyenne describes travel through the Sierra Madre Range as "very difficult

A late-season Pacific storm is hammering the Western United States this weekend with a one-two punch: a few feet of snow piling up in the northern Rockies, and damaging wind gusts shutting down major highways from the California coast through the Mojave. Active National Weather Service alerts span nine states from Washington to Arizona. The NOAA Weather Prediction Center puts the chance of formal Winter Storm Warning criteria being met above 80 percent for parts of the Mountain West, and local N

The National Weather Service has Winter Storm Warnings active for the South Washington Cascades and the Northern and Central Cascades of Oregon, plus the East Slopes of the Oregon Cascades. What is heading for the mountains starting this afternoon is not a routine April shower. A deep Pacific trough is pushing cold air and heavy moisture into the range, and the snow level is dropping fast. Totals above 2,500 feet could reach 21 inches from Marion County to Lane County in Oregon, with 6 to 12 inc

The late-season Pacific trough that closed more than 200 miles of I-80 across southern Wyoming on Monday is now reloading over the Colorado Rockies, with the Weather Prediction Center describing heavy wet snow across the Central Rockies before the main band tapers off tonight and a secondary round of moisture continuing through Thursday morning. The I-70 corridor and the West Slope are at risk, with Continental Divide totals running 12 to 18 inches in the expected scenario and 18 to 24 inches a

Late April is still delivering winter across the Rocky Mountains. The National Weather Service has Winter Weather Advisories active across mountain ranges of Montana, Wyoming, Colorado and Utah, with two shortwave troughs pushing snow into the high terrain today through early Tuesday. The Weather Prediction Center says snowfall rates of 1 to 1.5 inches per hour are possible across the Wasatch, Uinta and Absaroka ranges tonight. Wyoming Takes the Heaviest Hit Wyoming is the bullseye. The NWS offi

If you commute Victor to Jackson, haul freight through Togwotee, or planned a late-season ski trip to Grand Targhee this weekend, the next 48 hours are the problem. Everyone else has less to worry about than the warning text suggests. The National Weather Service in Riverton issued its Winter Storm Warning on April 15 for the Absaroka Mountains, the Teton and Gros Ventre Mountains and Yellowstone National Park, in effect from 6 PM Wednesday to 6 AM MDT Friday. NWS Billings has a parallel warning

The peak of the storm lands on Tuesday evening, which is also Cinco de Mayo, so anyone driving in the zone after dark will be sharing the road with holiday traffic on top of active chain controls and deteriorating mountain routes. Current Status I-80 Wyoming (Cheyenne to Rawlins): open, light/high-profile restriction expected Monday night I-25 north (Cheyenne to Casper): open, snow and wind impacts Tuesday I-70 west of Denver: open, chain controls likely Tuesday afternoon US-34 through Rocky Mou

If you've driven I-80 during storms like this before, you already know how fast the road can shut down. The National Weather Service has upgraded its earlier watches to full Winter Storm Warnings across the major Sierra corridors. The window runs from Tuesday morning through Wednesday evening, and three NWS offices are coordinating on this one: Sacramento, Reno, and Hanford. That Didn't Take Long Earlier Monday the Sierra was under Winter Storm Watches, with forecasters flagging up to 18 inches

If you need to cross the Sierra this weekend, today is your last realistic window. The National Weather Service has a Winter Storm Warning active for Mono County and the Donner Pass area, with watches across the Northern Sierra, and what is heading for the mountains starting Friday evening is not a routine spring snow event. Two Pacific systems are stacking back-to-back. The second is stronger. Snow totals above 7,000 feet could reach 28 inches near Lake Tahoe and up to four feet on the highest

Tuesday evening is Cinco de Mayo, and the storm peak overlaps with it. Anyone driving in the zone after dark will be sharing the road with holiday traffic on top of active chain controls and deteriorating mountain routes. Affected Zones Northern Front Range and RMNP — 10 to 24 inches across the foothills, isolated to 30 inches in the higher mountains of Boulder and Larimer counties. Includes Estes Park, Nederland, Cameron Pass, Red Feather Lakes, and Rocky Mountain National Park. NWS wording: tr

Marianne Nelson left her Rawlins home at 5:15 a.m. Monday for what should have been a 10-minute drive to her job at the Wyoming State Penitentiary. By 11 a.m. she had been stuck on Interstate 80 for nearly six hours. "I've got three semitrucks parked in front of me," Nelson told Cowboy State Daily. "I guess there's a tow truck somewhere, but he's stuck, too. I can't see anything, and I only have a quarter of a tank of gas." Nelson's morning was the lived experience of what the Wyoming Department

Forecast totals for the Pikes Peak summit reach as much as 35 inches over three days, though the official Winter Storm Warning for the broader Rampart Range zone covers 8 to 16 inches. Late April normally means the snow tires come off. This week, southern Colorado and northern New Mexico get the opposite, and the timing is awkward in a specific way. The storm hits the higher elevations first, then the snow level drops to 7,500 feet by Friday morning behind a cold front. Roads that look wet at 6

A powerful late-season winter storm is bearing down on the Sierra Nevada this weekend, prompting the National Weather Service to issue Winter Storm Warnings spanning every major mountain corridor from Lassen County to Sequoia National Park. Multiple NWS offices, including NWS Sacramento, NWS Reno, and NWS Hanford, are coordinating warnings as back-to-back upper-level lows push ashore from the Pacific, delivering moisture surges with precipitable water anomalies running 150 to 200 percent of norm

NOAA's Weather Prediction Center has raised Colorado's mountains to a "moderate" heavy snow risk for Wednesday, a rare category for May, as a back to back Pacific storm targets I-70, I-80, US-50, US-395, and Wolf Creek Pass from Monday into Wednesday. Two Act Storm A two act late season storm will hit the western United States starting Monday night, with the second act bringing the harder punch. California's Sierra Nevada gets struck first. NWS forecast offices in Sacramento, Reno, and Hanford

UPDATE (April 10, 2026): The National Weather Service in Sacramento has upgraded the Winter Storm Watch to a Winter Storm Warning for the West Slope Northern Sierra Nevada and Western Plumas County, now in effect from Friday evening through Monday afternoon. Snowfall totals have been revised sharply upward, with 1 to 2 feet now expected between 5,000 and 6,000 feet and 2 to 5 feet above 6,000 feet, with locally higher amounts at the peaks. Wind gusts have also increased to 55 MPH in the mountai

A late-season winter storm is set to bury the Northern Sierra Nevada under feet of snow this weekend, prompting the National Weather Service in Sacramento to issue a Winter Storm Watch for the west slope and Western Plumas County above 4,500 feet. The heaviest impacts are expected from late Friday evening through Sunday afternoon. What to Expect The NWS is forecasting 12 to 24 inches of snow above 4,500 feet, with 36 to 48 inches possible at the highest peaks. Snow levels will start relatively h

If you're driving across the Sierra on Tuesday or Wednesday this week, the trip is going to look very different from the clear roads of the past ten days. A Pacific trough is dropping snow levels to pass elevation from Tuesday morning onward, and by Tuesday night I-80 and Highway 50 are likely to be in chain controls at the same time, with no practical alternative through the central range. If your timing is flexible, Monday or Thursday are the two clean windows. The National Weather Service off

A Deceptive and Dangerous Commute The Northeastern United States is facing a highly deceptive weather event as a new winter system moves through the region. With Winter Weather Advisories currently active across New York, Connecticut, Rhode Island, Massachusetts, and Vermont, drivers are facing a treacherous mix of precipitation. Unlike a traditional snowstorm, this system is bringing a messy and highly volatile combination of sleet and freezing rain, turning the Friday commute into a significan

The advisory was issued at 12:27 PM MDT Tuesday by NWS Missoula and is one of several National Weather Service Winter Weather Advisories currently active across the country. The same Pacific trough that brought wintry mix to the Cascades earlier in the week is delivering one last late-season hit to the Northern Rockies before the pattern turns warmer for the weekend. Affected Zone West Glacier Region above 5,000 feet is forecast to receive wet snow accumulating 2 to 5 inches with gusts to 50 mph

If you are driving I-70 this weekend, today is not the day to start. The National Weather Service has a Winter Weather Advisory active right now for Colorado's mountain passes and a Freeze Warning covering the entire Front Range urban corridor and northeast plains tonight through Saturday morning. The storm clears Saturday, but the damage to roads and vegetation will already be done. What makes this one worth paying attention to is not the snow totals in the mountains. It is the freeze behind it

Winter is not done with New England. A potent late-season system is pushing a wintry mix of rain, sleet, and snow across the region today, delivering hazardous driving conditions along some of the Northeast's most heavily traveled highway corridors. The National Weather Service Boston/Norton office flagged two distinct hazard windows for Monday: a morning round of sleet and wet snow mixing in along and north of I-90, followed by a second round of scattered snow squalls expected through midnight.