Date Issued: | 2013-04-16 |
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Danger: | 2 |
Trend: | 5 |
Probability: | 3 |
Size: | 2 |
Problem: | 0 |
Discussion: | The National Weather Service Forecasts- TODAY...RAIN DEVELOPING. HIGHS AROUND 44. SOUTHEAST WIND 10 MPH. TONIGHT...RAIN. LOWS AROUND 34. SOUTHEAST WIND 10 TO 20 MPH. WEDNESDAY...RAIN IN THE MORNING...THEN MOSTLY CLOUDY WITH A Temperatures were the highest yesterday they have been since last fall. Eaglecrest summit temps reached 48 degrees and the Mt Roberts Tram hit 42. Things cooled off overnight and for the last 7 hours tram summit temps have been right at freezing with Eaglecrest slightly cooler at -3c. Temps are forecast to be warm again today but with the cloud cover in place not nearly as warm as yesterday. The solar warming today will not play as much of a roll. Watch for danger levels to increase today when the rain starts later in the day. As we go into tonight and tomorrow we expect as much as .8\" of rain in a 12 hour period during warm temps. This will add a lot of free moisture to the snowpack eating at the bonds in place and avalanche danger is sure to rise during this time. Natural avalanches are unlikely early today but become possible after the rain begins. When we see the bulk of the rain from midnight tonight into tomorrow morning expect avalanches to become more likely. Have a great day and enjoy~ |
Tip: | spring avalanches - avalanches that typically occur after an extended period of warm weather saturates the snowpack with melt water. Usually this water will flow down through the snowpack until it either reaches the ground or an ice layer where it spreads out and lubricates the layer causing the snow above to slide. True spring avalanches are always wet snow avalanches. Rain also adds to this equasion by adding additional moisture to the snowpack. |