Use this page to view archived advisories. The table below shows the overall danger rating and the bottom line for the 20 most recent advisories. Click on the time and date link above each danger rating icon to view the full advisory for that day. Use the date chooser or the pager at the bottom to scroll through the older advisories.

E.g., 06/28/2017
E.g., 06/28/2017
Date the advisory was published: Bottom Line
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March 22, 2013 at 7:09 am

The avalanche danger for today is low for all aspects and elevations. This past week we received a warm storm that brought 4"-8" inches of snow to elevations above 6,500 ft. Snow levels fluctuated and most of the snowpack below 6,500 feet took a hit from rain on snow. Overall, the recent storm snow was wet and deposited itself in a very cohesive manner on the mountain. The North winds blew yesterday on the upper mountain at a steady 20-30 mph with gusts higher. This morning, winds out of the north have increased and currently Gray Butte is showing average wind speeds of 40-50 mph with gusts to 78 mph. Most of the new snow is well pasted on the old snowpack or has simply blown away. That being said, one's primary concern for today should be for freshly formed wind slabs in isolated areas, below and above treeline, all aspects.

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March 17, 2013 at 6:38 am

The avalanche danger for today is low for all aspects and elevations. Our current snowpack sits in a state of transition from the varying temperatures over the past week. Cooler days recently have decreased the chance of the loose-wet avalanche potential. Small wind slabs are isolated to the mid and upper elevations of the mountain and will be difficult to trigger. A few cornices in the Castle Lake area along Middle Peak are present and could become weak during the warm portions of the day. While conditions are overall stable, low avalanche danger means avalanches are still possible.

 

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March 16, 2013 at 6:44 am

The avalanche danger for today is low for all aspects and elevations. We've seen a general cooling trend over the last two days and temperatures will remain similar to yesterday. All aspects below 8,000 feet will host soft, sticky snow with a low potential for loose-wet sloughs. Snow on slopes near and above treeline is making a transition to melt/freeze corn...supportable, however not fully mature... Mid elevation wet-loose activity has been low. Upper elevations will host wind packed powder and some small wind slabs in isolated areas with low potential to trigger.

 

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March 15, 2013 at 6:55 am

Warm temperatures during the day and above freezing lows at night has kept the new snow we received last week very soft with the potential of wet, loose avalanche activity today. Slopes that are southerly facing and steeper than 35 degrees will be most prone to wet, loose instability during the warmest portions of the day. Temperatures today will be slightly cooler than yesterday and thus any instability will likely be limited to the Castle Lake area and elevations below 7,000 feet.

 

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March 10, 2013 at 7:05 am

For today, the overall avalanche danger is LOW with pockets of   MODERATE in upper elevation wind loaded slopes with a North and Northeasterly aspect. The new snow has bonded well to the old snow and no avalanche activity has been observed or reported.

 

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March 9, 2013 at 6:57 am

For today, the avalanche danger is LOW for low and mid elevations and  MODERATE on the upper elevations. The new snow has bonded well to the old snow and no avalanche activity has been observed or reported.

 

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March 8, 2013 at 7:04 am

For today, the avalanche danger remains LOW for lower aspects and elevations and  MODERATE on the mid and upper elevations.. The existing snowpack looks to be handleing the new snow well but with the accompanying winds we should expect some wind slabs, storm slabs, and crossloading. Weak interfaces have been observed in the new storm where slight density changes exist but overall the storm snow is bonding well to the old snow surface.

 

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March 7, 2013 at 7:18 am

For today, the avalanche danger remains LOW for lower aspects and elevations and has increased to MODERATE on the mid and upper elevations. Our storm totals are approaching 2 feet in the deepest places heightening our avalanche conditions and making human triggered avalanches possible. The existing snowpack looks to be handleing the new snow well but with the accompanying winds we should expect some wind slabs, storm slabs, and crossloading. Yesterday weak interfaces were observed in the new storm snow 30-35 cm below the surface. They didn't have much energy or a high quality shear but were failing easliy with comprssion tests (ct4&5, Q2).

 

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March 3, 2013 at 7:00 am

For today, the overall avalanche danger remains LOW for all aspects and elevations. We received a trace of new snow over the past 12 hours with light to moderate NW winds. Instabilities are unlikely today. Most other areas have been scoured down to the old, firm snow surface and/or entered a melt/freeze cycle. Normal caution advised.

We are expecting the avalanche danger to rise on late Tuesday and Wednesday, 3-5 and 3-6. Up to 1" inch of water and moderate to strong Southwest winds are expected for this storm. This could mean several inches of snow in town and more above 6,000 feet. A firm snowpack in place will provide a great bed surface for this new snow to potentially slide on. Stay tuned for potential advisory updates as the week progresses.

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March 2, 2013 at 6:59 am

For today, the overall avalanche danger remains LOW for all aspects and elevations. We received no new snow over this past week with predominantly moderate northwest winds. Instabilities are unlikely and will be limited to areas of wind loading near ridgetops, bowls, rock outcrops, chutes and gullies on all aspects and on slopes steeper than 35 degrees. Most other areas have been scoured down to the old, firm snow surface and/or entered a melt/freeze cycle. Normal caution advised.

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March 1, 2013 at 6:55 am

For today, the overall avalanche danger remains LOW. We received no new snow over this past week with predominantly moderate northwest winds. Instabilities are unlikely and will be limited to areas of wind loading near ridgetops, bowls, rock outcrops, chutes and gullies on all aspects and on slopes steeper than 35 degrees.  Most other areas have been scoured down to the old, firm snow surface and/or entered a melt/freeze cycle.

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February 24, 2013 at 7:15 am

For today, the overall avalanche danger remains LOW with pockets of MODERATE danger where wind slabs are present. We received 5-7 inches of new snow over this past week with moderate to strong winds from various directions. Instabilities will be limited to areas of wind loading near ridgetops, bowls, rock outcrops, chutes and gullies. Winds have primarily blown from the northwest, however periods of wind from other directions have occurred. Be cautious of wind slabs on all aspects and on slopes steeper than 35 degrees.  Most other areas have been scoured down to the old, firm snow surface.

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February 23, 2013 at 7:03 am

A variety of snow conditions exist today in the forecast area. Overall low with pockets of moderate avalanche danger. We received 4-6 inches of new snow over the week with strong winds from various directions.We received up to an inch in the last 24 hours. While some areas have been scoured down to old snow surface by winds in the past several days, instabilities will be found in isolated wind loaded areas near ridgetops, bowls, rock outcrops, chutes and gullies.

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February 22, 2013 at 6:57 am

A variety of snow conditions exist today in the forecast area. Overall low to moderate avalanche danger prevails. We received 4-6 inches of new snow over the week with strong winds from various directions. While some areas have been scoured down to old snow surface by winds in the past several days, instabilities will be found in isolated wind loaded areas near ridgetops, bowls, rock outcrops, chutes and gullies

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February 17, 2013 at 8:04 am

Overall, avalanches are unlikely today in the forecast area. A variety of conditions will be found out there with most areas trending on the firm side. Wind slabs have bonded well to the widespread crust layer and are not a concern. A thick layer of facets still exists below our thick crust, however we do not have any slabs above this layer from our recent observations. With plentiful sunshine, any southerly aspect should warm nicely and any instability will be limited to roller balls during the warmest portion of the day. Other aspects will remain firm and funky!

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February 17, 2013 at 7:02 am

Overall, avalanches are unlikely today in the forecast area. A variety of conditions will can be found out there with most areas trending on the firm side. Wind slabs have bonded well to the widespread crust layer and are not a concern. A thick layer of facets still exists below our thick crust, however we do not have any slabs above this layer from our observations. With plentiful sunshine, any southerly aspect should warm nicely and any instability will be limited to roller balls during the warmest portion of the day. Other aspects will remain firm and funky!

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February 16, 2013 at 1:34 am

Overall, avalanches are unlikely today in the forecast area. A variety of conditions will can be found out there with most areas trending on the firm side. Wind slabs have bonded well to the widespread crust layer and are not a concern. A thick layer of facets still exists below our thick crust, however we do not have any slabs above this layer from our observations. With plentiful sunshine, any southerly aspect should warm nicely and any instability will be limited to roller balls during the warmest portion of the day. Other aspects from the top 180 degrees of the compass will remain firm and funky!

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