A sudden snap of cold weather is affecting parts of the western United States. Snow, frost, and freezing temperatures have led to alerts from the National Weather Service (NWS) across at least five states. The advisories, issued late Wednesday, outline a mix of winter weather and frost risks in Idaho, Montana, Oregon, California, and Nevada. These conditions are more typical of early spring or winter rather than early summer.
States Affected by the Cold Weather
In Montana, the Absaroka and Beartooth Mountains are under a Winter Weather Advisory until Thursday morning. The area is expected to experience light snow and gusty winds up to 35 mph, particularly along the Beartooth Highway. Further south and west, freezing temperatures and frost are the main concerns:
- Idaho: The eastern Magic Valley, Snake River Plain, and nearby areas have frost advisories and freeze warnings. Temperatures could drop to 28 F to 32 F.
- Oregon and northern California: Areas like the Klamath Basin and Modoc County are under frost advisories until Thursday morning, with lows around 33 F. Some areas might experience freezing temperatures in colder spots.
- Nevada: Northern and south central Elko County also have frost advisories, with expected lows between 33 F and 37 F.
- Western Montana (Lemhi County): Temperatures may fall to 30 F, posing a frost risk.
Most advisories are set to expire early to mid-morning Thursday as temperatures begin to rise after sunrise.
Conditions and Potential Impacts
The NWS warns of widespread frost formation, with temperatures in some locations dipping below freezing for several hours overnight. These conditions could:
- Damage sensitive crops and outdoor plants
- Harm unprotected vegetation during the early growing season
- Pose risks to outdoor plumbing in colder areas
Snow at higher elevations could further complicate travel. The Beartooth Highway, known for its high altitude, might experience slippery conditions and reduced visibility despite it being mid-June.
Unusual Timing of Cold Weather
This cold spell is unusual for this time of year. June usually brings milder temperatures, especially in lower-elevation desert and valley areas across the interior west. While the Beartooth Highway can see snow in June, it is significant enough to disrupt travel during the busy tourist season. Frost advisories across several states emphasize that this is a notable cold air outbreak, where a cool air mass moves unusually far south.
Advice for Residents
The NWS recommends residents take immediate precautions:
- Cover or bring in sensitive plants
- Protect outdoor irrigation and plumbing systems
- Be cautious in mountainous travel areas where snow may occur
In essence, despite being June, parts of the west are experiencing a brief return to winter-like overnight conditions, showcasing the volatility of the region’s weather during transitional seasons.