Station Name: MF SAN JOAQUIN R NR MAMMOTH LAKES CA
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 7,618 feet

Nearest Address:
A12 Devils Postpile Campground Rd
Mammoth Lakes, CA 93546
Madera County

GPS Coordinates: 37.63194444, -119.0863889

Nearby Water Temperatures

Avalanche Warning issued February 17 at 5:56AM PST by NWS Reno NV

Non-Weather Emergency Message. Not sent to IPAWS.

Effective: Tue February 17, 2026, 5:56 AM
Expires: Wed February 18, 2026, 7:15 AM

AVWREV The Eastern Sierra Avalanche Center in Mammoth Lakes has issued a BACKCOUNTRY AVALANCHE WARNING for the following areas: NWS Las Vegas NV - CA-519 (Eastern Sierra in Inyo County) NWS Reno NV - CA-073 (Eastern Sierra in Mono County) * WHAT...The avalanche danger for the warning area is HIGH and will remain at HIGH until Wednesday morning. * WHERE...The eastern slopes of the Sierra Nevada mountain range between Virginia Lakes to the north and Bishop Creek to the south. * WHEN...In effect from Tuesday 6 AM PST to Wednesday 7 AM PST. * IMPACTS...Recent heavy snow, combined with strong winds, will produce widespread areas of unstable snow. * PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche conditions. Travel in avalanche terrain is not recommended. Avalanches may run long distances and can run into mature forests, valley floors, or flat terrain. Consult http://www.esavalanche.org/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.

Winter Storm Warning issued February 17 at 1:43PM PST until February 18 at 7:00AM PST by NWS Reno NV

Effective: Tue February 17, 2026, 1:43 PM
Expires: Wed February 18, 2026, 7:00 AM

* WHAT...Heavy snow. Additional snow accumulations between 1 to 3 feet along and west of US-395, locally up to 4 feet along the highest peaks. Lesser amounts of 2 to 6 inches for the Chalfant Valley. Winds gusting up to 60 mph, with up to 70 mph for wind prone locations along US-395. Sierra ridge gusts over 100 mph. For Thursday's storm, up to 4 inches along and east of Highway 395, 6 to 8 inches west of Highway 395, and up to a foot along the crest. * WHERE...Mono County. * WHEN...For the Winter Storm Warning, until 7 AM PST Wednesday. For the Winter Weather Advisory, from 4 AM to 10 PM PST Thursday. * IMPACTS...Travel could be very difficult to impossible with periods of white out conditions. Very strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...The highest snowfall rates will continue through early Wednesday morning. There is also the threat of lightning throughout Mono County through 6pm. Blowing snow may produce limited visibility and near whiteout conditions at times.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Weather Advisory issued February 17 at 1:43PM PST until February 19 at 10:00PM PST by NWS Reno NV

Effective: Tue February 17, 2026, 1:43 PM
Expires: Wed February 18, 2026, 7:00 AM

* WHAT...Heavy snow. Additional snow accumulations between 1 to 3 feet along and west of US-395, locally up to 4 feet along the highest peaks. Lesser amounts of 2 to 6 inches for the Chalfant Valley. Winds gusting up to 60 mph, with up to 70 mph for wind prone locations along US-395. Sierra ridge gusts over 100 mph. For Thursday's storm, up to 4 inches along and east of Highway 395, 6 to 8 inches west of Highway 395, and up to a foot along the crest. * WHERE...Mono County. * WHEN...For the Winter Storm Warning, until 7 AM PST Wednesday. For the Winter Weather Advisory, from 4 AM to 10 PM PST Thursday. * IMPACTS...Travel could be very difficult to impossible with periods of white out conditions. Very strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...The highest snowfall rates will continue through early Wednesday morning. There is also the threat of lightning throughout Mono County through 6pm. Blowing snow may produce limited visibility and near whiteout conditions at times.

Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Weather Advisory issued February 18 at 2:21AM PST until February 19 at 10:00PM PST by NWS Reno NV

Effective: Wed February 18, 2026, 2:21 AM
Expires: Thu February 19, 2026, 2:30 AM

* WHAT...Heavy snow. Lingering snow showers through the remainder of today with up to 4 inches of additional snow. Winds gusting up to 50 mph along Sierra ridgetops. For the Winter Weather Advisory, up to 4 inches along and east of Highway 395, 6 to 8 inches west of Highway 395, and up to a foot along the crest. * WHERE...Mono County. * WHEN...For the Winter Storm Warning, until 7 AM PST this morning. For the Winter Weather Advisory, from 4 AM to 10 PM PST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Wednesday morning and evening commutes. Gusty winds could bring down tree branches.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.

Winter Storm Warning issued February 18 at 2:21AM PST until February 18 at 7:00AM PST by NWS Reno NV

Effective: Wed February 18, 2026, 2:21 AM
Expires: Thu February 19, 2026, 2:30 AM

* WHAT...Heavy snow. Lingering snow showers through the remainder of today with up to 4 inches of additional snow. Winds gusting up to 50 mph along Sierra ridgetops. For the Winter Weather Advisory, up to 4 inches along and east of Highway 395, 6 to 8 inches west of Highway 395, and up to a foot along the crest. * WHERE...Mono County. * WHEN...For the Winter Storm Warning, until 7 AM PST this morning. For the Winter Weather Advisory, from 4 AM to 10 PM PST Thursday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Wednesday morning and evening commutes. Gusty winds could bring down tree branches.

If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. Slow down and use caution while traveling. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.