DISCUSSION: When you think about June weather in the U.S., you probably have ideas of warm, sunny days - perfect for outdoor activities. However, the higher elevations in the northwest part of the U.S. may have to contend with snow this upcoming weekend into early next week. Higher elevations are almost always colder than lower elevations because temperature generally decreases with height in the lower part of the atmosphere. But, this weekend a trough, or dip, in the jet stream is expected to bring especially cool temperatures to this part of the country. More than 6 inches of snow may fall in portions of central Oregon, northern California, NW Nevada, central Idaho, SW Montana, and NW Wyoming. Most of this snow should remain above the 5,000-ft elevation, but may reach the lower portions of valleys in Wyoming. Given the more intense June sun (due to a more direct overhead angle), snow shouldn't accumulate on roadways. The biggest impacts will likely be to campers and others who plan to participate in outdoor activities. The much cooler temperatures may come as a bit of a shock for those not expecting it this time of year.
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©2017 Meteorologist Dr. Ken Leppert II