Snowpack Summary published on April 27, 2018 @ 8:08 am
Issued by Ryan Lewthwaite -

bottom line:

We are in a state of melting & Loose Wet avalanche activity for today & tomorrow. With the CLOSING weekend upon us expect highly variable conditions & snowpack depths between zero & 3 feet. Sunday looks to bring colder than average temperatures & a variety of precipitation forms. Tonight we will gain a refreeze of the snowpack & icy conditions for the early morning hours. The Bridgeport Avalanche Center will have rescue skills & beacon practicing in the Leavitt junction area around 1:PM this Saturday & Sunday.

Avalanche Character 1: Loose Wet
Loose Wet avalanches occur when water is running through the snowpack, and release at or below the trigger point. Avoid very steep slopes and terrain traps such as cliffs, gullies, or tree wells. Exit avalanche terrain when you see pinwheels, roller balls, a slushy surface, or during rain-on-snow events.

Natural & human caused Loose Wet avalanches are possible for the next two days. Although small in size, a Loose Wet slide could cause a traveler harm by sending them through an unintended path. Without a cold enough nightly temperature for supporting a refreeze of the snowpack, our snow remains warm & loose. 

Snowpack Discussion

The high pressure we've been enduring will be pushed aside by a cold & wet low pressure system. Our soft & saturated near 0C degree snowpack will change to a brick with overnight temperatures in the low 20's. With the lock-up expect stability to increase but desirability of sliding will decrease. 

recent observations

Small Loose Wet avalanches are still occuring & will continue for today & tomorrow. Colder temps & clouds on Sunday will lessen the Loose Wet activity, unless rain dominates the weather. Nightly temperatures look to be below freezing beginning tonight, leaving early mornings very icy. Earth is exposing itself more each day & hollow cavities are becoming more dangerous.

CURRENT CONDITIONS Weather observations from Sonora Pass
0600 temperature: 44 deg. F.
Max. temperature in the last 24 hours: 62 deg. F.
Average wind direction during the last 24 hours:
Average wind speed during the last 24 hours: mph
Maximum wind gust in the last 24 hours: mph
New snowfall in the last 24 hours: 0 inches
Total snow depth: 36 inches

Cool & dry air for the next couple days. It will be breezy with winds from the Southwest that could gust to 50 mph. Sunday brings with it low pressure, colder than average temperatures & precipitation. Precipitation could come in a variety of forms including: rain, ice & snow. Monday & Tuesday call for a chance of thunderstorms. There has not been an overnight refreeze in almost a week. 

Two-Day Mountain Weather Forecast Produced in partnership with the Reno NWS
For 8000 ft. to 10000 ft.
  Friday Friday Night Saturday
Weather: Sunny Clear Sunny
Temperatures: 49 to 59 deg. F. 26 to 31 deg. F. 40 to 50 deg. F.
Wind direction: South shifting to Southwest Southwest Southwest
Wind speed: 10 to 20 mph increasing to 20 to 30 mph; gusts to 45 mph later 15 to 25 mph; gusts to 40 mph 15 to 25 mph; gusts to 40 mph
Expected snowfall: 0 in. 0 in. 0 in.
For above 10000 ft.
  Friday Friday Night Saturday
Weather: Sunny Clear Sunny
Temperatures: 41 to 49 deg. F. 21 to 26 deg. F. 32 to 37 deg. F.
Wind direction: South Southwest Southwest
Wind speed: 20 to 40 mph; gusts to 50 mph 20 to 35 mph; gusts to 50 mph 20 to 30 mph; gusts to 50 mph
Expected snowfall: 0 in. 0 in. 0 in.

This snowpack summary applies only to backcountry areas in the Bridgeport Winter Recreation Area. Click here for a map of the area. This snowpack summary describes general avalanche conditions and local variations always occur. This snowpack summary expires in 48 hours unless otherwise noted. The information in this snowpack summary is provided by the USDA Forest Service who is solely responsible for its content.