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Boise, Idaho
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Winter Weather

Winter Weather Outlook There is a Good chance of a major winter storm developing in the next several days.
Winter Storm Watch There is a Greater than 50% chance of a major winter storm in the next several days
Winter Storm Warning Any combination of winter weather including snow, sleet, or blowing snow. The snow amount must meet a minimum accumulation amount which is different in snow prone areas like the mountains than it is in valley locations.
Blizzard Warning Falling and/or blowing snow frequently reducing visibility to less than 1/4 mile AND sustained winds or frequent gusts greater than 35 mph will last for at least 3 hours.
Ice Storm Warning Freezing rain/drizzle is occurring with a significant accumulation of ice (more than 1/4 inch) or accumlation of 1/2 inch of sleet. (A very rare occurance across Southwest Idaho, Southeast Oregon.)
Wind Chill Warning Wind chill Temperature less than or equal to -20 and wind greater than or equal to 10 mph.
Winter Weather Advisory Any combination of winter weather such as snow, blowing snow, sleet, etc. where the snow amount is a hazard but does not meet Winter Storm Warning criteria above.
Freezing Rain/Drizzle Advisory Light freezing rain or drizzle with little accumulation. (A somewhat rare occurance across Southwest Idaho, Southeast Oregon.)
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