October 31 Update — Eastern San Juan Mountains Warning

A separate National Weather Service warning issued by the Pueblo office at 11:03 a.m. Mountain Daylight Time Saturday forecasts 8 to 14 inches of snow above 10,000 feet in the eastern San Juan Mountains.

That warning runs from 5 p.m. Sunday, November 1, until 11 a.m. Mountain Standard Time Monday, November 2. Gusts could reach 45 mph, with blowing and drifting snow making travel especially difficult Sunday night and Monday morning.

The eastern-mountain forecast is separate from the 12–18-inch forecast for the northwestern and southwestern San Juan Mountains described in the earlier report below.

Earlier October 31 Reporting

The National Weather Service in Grand Junction issued a winter storm warning October 31 for Colorado’s northwestern and southwestern San Juan Mountains, forecasting heavy snow at elevations above 10,000 feet.

The warning calls for 12 to 18 inches of accumulation, with locally higher totals possible, and wind gusts reaching 45 mph. Those figures describe expected conditions during the coming storm, rather than snow or wind already measured.

The stated warning period runs from 6 a.m. Sunday, November 1, through noon Mountain Standard Time Monday, November 2.

Forecasters warned that travel could become very difficult or impossible in affected mountain areas. They also said hazardous conditions could affect the Monday morning commute.

The elevation threshold is central to the notice: the forecast of heavy accumulation applies above 10,000 feet. It should not be read as a uniform snowfall prediction for lower-elevation communities across southwest Colorado.

The weather service’s public instructions urge drivers to slow down and exercise caution. It directs travelers to the 511 road-information service for current state road conditions.

The warning was issued at 10:37 a.m. Mountain Daylight Time Saturday, October 31. This account reports the forecast and validity period in that official notice.

Sources NWS Grand Junction — October 31 San Juan Mountains Winter Storm Warning: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2bdd41b860e09ab541155db973dc91e9b1c8543e.001.2 NWS Pueblo — October 31 Eastern San Juan Mountains Winter Storm Warning: https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.972dce7f6822bb9f6a918d407616194a7550c94d.001.2