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12 and/or 24 hour snow depth and new snowfall by 8 AM and 8 PM.
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Moderate to heavy snowfall. Example: 1/2-1 inch per hour for several
hours and visibilities less than 1/2 mile.
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Strong winds above 50 mph (sustained or gusts).
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Freezing rain/drizzle (any intensity).
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Report changeover from rain to snow or from snow to rain.
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Dense Fog (visibility less than a quarter of a mile).
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If current conditions do not coincide with the current WFO Boulder
Forecast.
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Adverse road conditions.
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If any of the below snow criterion is met.
**Our criteria for issuing warnings and advisories are listed
above. Please pay close attention to when your snowfall approaches
4 inches and again at 8 inches at the higher elevations (at or above 6500 feet).
3 and 6 inches are the critical numbers for the stations at lower
elevations (below 6500 feet).
- Still in doubt...CALL US!
8 inches or more in a 12 hour period.