San Juan River Basin storm history

Areas of dense fog developed within the San Juan River Basin overnight from December 25 through 26. The KPSO AWOS at the Stevens-Pagosa Springs Airfield reported multiple prolonged periods of reduced visibility throughout the night due to mist and fog with numerous occurrences of…

Localized dense fog developed in the San Juan River Basin during the morning of December 7. The KPSO AWOS at the Stevens-Pagosa Springs Airfield reported about thirty minutes of freezing fog reducing visibility to 1/4 mile shortly after sunrise. No reports of injuries, damages, o…

Generally 5 to 10 inches of snow fell across the area with 10.5 inches of snow reported at Pagosa Springs 6.1 NE.

Localized dense fog developed within the San Juan River Basin in the early morning of November 22. The KPSO AWOS at the Stevens-Pagosa Springs Airfield reported two brief periods of 1/4-mile visibility overnight due to freezing fog, once near 0100 MST, and again between 0200-0400…

Patches of dense fog developed over portions of the San Juan River Basin following a round of snow showers in the early morning hours on November 21. The KPSO AWOS at the Stevens-Pagosa Springs Airfield reported two brief periods of 1/4-mile visibility from freezing fog before su…

The US Drought Monitor removed the last area of Extreme (D3) Drought from Colorado Zone 023 - San Juan River Basin on October 14th, 2025. Extreme (D3) Drought did not reoccur for a month. Therefore this will be the last entry for this zone until such time as Extreme (D3) Drought …

Five of the seven reporting stations available for verification recording temperatures at or below 32F for at least 3 hours, and four of those seven recorded temperatures at or below 28F for at least three hours. This means that at least 50% of the zone experienced a season-endin…

At the beginning of the month of October, the US Drought Monitor analyzed an area of Extreme (D3) Drought as covering roughly 1% of Colorado Zone 023 - San Juan River Basin, with 50% of the zone under Severe (D2) Drought conditions, and 49% under Moderate (D1) Drought conditions.…

At the beginning of the month of September, the US Drought Monitor analyzed an area of Extreme (D3) Drought that covered roughly 50% of Colorado Zone 023 - San Juan River Basin, with the remainder of the zone under Severe (D2) Drought conditions. With the 9/17 Drought Monitor upd…

The August 20th US Drought Monitor update showed the worsening of drought conditions across the southern Colorado valleys, with Colorado Zone 023 - San Juan River Basin developing Extreme (D3) Drought conditions across roughly 2/3 of the zone. The extent of this drought remained …

There is no available ASOS or AWOS site. The coldest temperature recorded at a RAWS site in the zone was 23F at the San Juan Portable RAWS #2, while the coldest temperature recorded at any sensor in the zone was 21F. Seven of the eight available sensors recorded temperatures at o…

There is no ASOS or AWOS available in this zone. The coldest temperature recorded at any RAWS site was 24F, at the San Juan Portable RAWS #2. The coldest temperature recorded at any site was 22F. Temperatures were at or below 32F for an average of 4.8 hours, with 5 of the 7 avail…

Dense fog that produced visibility of 1/4 mile or less at the KDRO ASOS was observed, via satellite, to extend into the adjacent Colorado Forecast Zone 023. The nearest surface observation points in this zone, including the KPSO AWOS, were well north of the patch of dense fog, wh…

Generally 5 to 8 inches of snow fell across the area with 8.5 inches of snow reported at Pagosa Springs 5.8 SSE. Wind gusts were in the 20 to 35 mph range with a peak wind gust of 38 mph at the Sandoval Mesa RAWS.

The KPSO AWOS in Pagosa Springs recorded an approximately 1.5 hour period where temperatures were below 25F and wind chill values were below 15F. Winds were at or above 10 mph, gusting or sustained, for the majority of the period. That said, even weaker winds produced sufficientl…

The KPSO AWOS in Pagosa Springs recorded an approximately 1.5 hour period where temperatures were below 25F and wind chill values were below 15F. Winds were at or above 10 mph, gusting or sustained, for about 45 minutes, while the remainder of the period saw weaker winds that sti…

The KPSO AWOS in Pagosa Springs recorded an approximately 7 hour period where temperatures were below 25F and wind chill values were below 15F. Winds were at or above 10 mph, gusting or sustained, for about 3 hours, while the remainder of the period saw weaker winds that still pr…

The KPSO AWOS in Pagosa Springs recorded an approximately 4 hour period where temperatures were below 25F and wind chill values were below 15F. Winds were generally below 10 mph, but did still produce sufficiently cold wind chill values. Temperatures ranged from 18F to 21F and wi…

The KPSO AWOS in Pagosa Springs recorded an approximately 1 hour period where temperatures were below 25F and wind chill values were below 15F. Winds were below 10 mph, but still produced sufficiently cold wind chill values. Temperatures hovered around 7F and winds ranged from 6 …

The KPSO AWOS in Pagosa Springs recorded an approximately 5 hour period where temperatures were below 25F and wind chill values were below 15F. Winds were at or above 10 mph, gusting or sustained, for the majority of the period. But even the weaker winds produced sufficiently col…

Around 3AM local time, the KPSO AWOS at Stephens Field in Pagosa Springs, CO began reporting visibilities less than 1/4 mile. Additionally, satellite imagery provided a gauge for the extent of the dense fog throughout the San Juan River Basin. As the sun rose, road cameras provid…

Shortly before 3AM local time, the KPSO AWOS at Stevens Field in Pagosa Springs, CO began reporting visibilities less than 1/4 mile. Satellite imagery also indicated a large area of dense fog forming throughout the San Juan River Basin. As the sun rose, road cameras provided by t…

With 4 of the 7 reporting sites available for verification recording temperatures at or below 32F for at least 3 hours, at least 50% of the zone experienced freezing temperatures. Only 1 of the 7 sites experienced temperatures at or below 28F for at least 3 hours, meaning this fr…

Six of the seven stations available for verification purposes recorded temperatures at or below 32F for at least three hours on the night of October 20th to the 21st. Th lowest recorded temperature was 30F, while the lowest recorded temperature from a RAWS station was 31F. Freezi…

Generally 1 to 3 inches of snow fell across the area. Winds gusted in the 25 to 35 mph range with peak wind gust of 50 mph at Sandoval Mesa RAWS on February 27. Mesonet sensors across the area received 0.3 inches of liquid precipitation with below freezing temperatures and winds …

Generally 3 to 6 inches of snow fell across the area with 6.8 inches measured at Pagosa Springs 6.1NE. Wind gusts were generally under 30 mph with a peak wind gust of 29 mph.

Generally 10 to 15 inches of snow fell across the area with 14.6 inches at Pagosa Springs 0.2 N.

Dense fog was observed across the San Juan River Basin, including at the Stevens Field - Pagosa Springs Airport where visibility was reduced to less than one quarter of a mile for several hours.

Generally 5 to 8 inches of snow fell across the area (includes CoCoRaHS).

Overnight lows ranged from 19 to 26 degrees across the area.

The Coal Mine Fire started in late June from a lightning strike, 18 miles south of Pagosa Springs, and grew to 292 acres before it was contained in mid July.

The Coal Mine Fire started in late June from a lightning strike, 18 miles south of Pagosa Springs, and grew to 292 acres before it was contained in mid July.

Generally 4 to 7 inches of snow fell across the area.

Generally 3 to 6 inches of snow fell across the area.

Generally 3 to 6 inches of snow fell across the area.

Generally 3 to 6 inches of snow fell across the area.

Generally 3 to 9 inches of snow fell across the area. Winds gusted up to 48 mph at times.

Generally 5 to 10 inches of snow fell across the area.

Generally 3 to 6 inches of snow fell across the area.

Generally 5 to 10 inches of snow fell across the area with locally higher amounts up to 14 inches reported in the foothills.

Generally 5 to 10 inches of snow fell across the area with locally higher amounts close to 14 inches reported in the foothills.

Generally 4 to 8 inches of snow fell across the area with locally higher amounts of up to a foot reported.

Generally 4 to 6 inches of snow fell across the area.

Generally 3 to 5 inches of snow fell across the area.

Overnight lows ranged from 25 to 30 degrees across the area. This was a season-ending freeze for the San Juan River Basin.

The status of the drought improved across the entirety of the zone through the month of June. The extreme (D3) drought improved to the severe (D2) drought area-wide by the end of the month.

Overnight lows ranged from the upper 20s to low 30s across the area.

The status of the drought worsened across the entirety of the zone through the month of May. The moderate (D1) to severe (D2) drought degraded to the extreme (D3) category area-wide.

A large plume of dust was evident across portions of the San Juan River Basin. The Emergency Manager of Archuleta County reported that visibilities of less than one mile occurred in blowing dust as wind gusts exceeded 50 mph. The event was sustained for several hours.