Northwest Avalanche Bulletin
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This information is issued by the NW Avalanche Center, a federal agency
in Seattle, WA.
Northwest Weather and Avalanche Center Advisory
 
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SUMMER AVALANCHE STATEMENT
Please note that the Northwest Weather and Avalanche Center is closed
for the summer. However, daily operation is scheduled to begin again
in the fall.
Because avalanches continue to occur at higher elevations during the
summer months in areas having either residual snow cover or permanent
snow and ice cover, and several people within the Northwest have been
killed by these events, here are a few notes about summer avalanches.
Avalanches occurring during the summertime can be generally grouped
into three types:
First, wet slides within the existing snowpack are similar to wet
spring slides, as progressive weakening occurs within the snowpack
through melting and water percolation. Although these slides are most
likely to occur during the warmest part of the day, they may occur at
anytime of the day during periods when the snowpack does not refreeze
substantially at night.
The second type of summer avalanche occurrence is associated with new
snowfall at high elevations. Summer snowfalls are usually followed by
substantial warming of the newly fallen snow as air temperatures rise
rapidly with intense summer sunshine. When the new snow overlies an
old snow, ice or smooth rock surface this may lead to possible wet
loose or wet slab avalanches.
The third type of summer avalanche is an ice or snow and ice
avalanche. These are usually triggered by the failure of large ice
blocks such as seracs within glacier icefalls. This in turn may
involve additional ice and/or snow. Timing of these events are mostly
random, usually being associated with both meteorological conditions
and glacier motion. However, they are most likely to occur during
extended periods of warm weather.
Climbers, hikers and other back-country travelers during the summer are
advised to evaluate snow stability and use normal safety practices for
travel in avalanche terrain with snow cover.
If you have any comments or suggestions regarding this past season's
mountain weather or back-country avalanche forecasting program, please
direct them to:
Northwest Weather and Avalanche Center
7600 Sandpoint Way NE
Seattle, WA 98115
Or you may email comments to:
nwac.sew@noaa.gov
Have a safe and enjoyable summer!
Moore/Northwest Weather and Avalanche Center
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14. http://avalanchenw.org/infoexchange.html
15. http://www.nwac.us/photos/view/snowpits/current/
16. http://www.nwac.us/photos/view/avalanches/current/
17. http://www.nwac.us/photos/view/archives/
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35. http://www.nwac.us/forecast/avalanche/current/zone/1/
36. http://www.nwac.us/forecast/avalanche/current/zone/5/
37. http://www.nwac.us/forecast/avalanche/current/zone/6/
38. http://www.nwac.us/forecast/avalanche/current/zone/7/
39. http://www.nwac.us/forecast/avalanche/current/zone/8/
40. http://www.nwac.us/forecast/avalanche/current/zone/2/
41. http://www.nwac.us/forecast/avalanche/current/zone/3/
42. http://www.nwac.us/forecast/avalanche/current/zone/4/
43. http://www.nwac.us/forecast/avalanche/current/zone/9/
44. http://www.nwac.us/forecast/avalanche/current/zone/10/
45. http://www.nwac.us/forecast/avalanche/current/zone/11/
46. http://www.nwac.us/forecast/avalanche/current/zone/12/
47. http://www.nwac.us/forecast/avalanche/current/zone/13/
48. http://www.nwac.us/forecast/avalanchewashington/current/
49. http://www.nwac.us/forecast/avalancheoregon/current/
50. http://www.nwac.us/forecast/previous/
51. http://www.nwac.us/weatherdata/map/
52. http://www.nwac.us/data/CLISNO
53. http://www.nwac.us/data/
54. http://www.nwac.us/weatherdata/hurricaneridge/now/
55. http://www.nwac.us/weatherdata/hurricaneridge/10day/
56. http://www.nwac.us/weatherdata/mtbakerskiarea/now/
57. http://www.nwac.us/weatherdata/mtbakerskiarea/10day/
58. http://www.nwac.us/weatherdata/washingtonpass/now/
59. http://www.nwac.us/weatherdata/washingtonpass/10day/
60. http://www.nwac.us/weatherdata/mazama/now/
61. http://www.nwac.us/weatherdata/mazama/10day/
62. http://www.nwac.us/weatherdata/missionridge/now/
63. http://www.nwac.us/weatherdata/missionridge/10day/
64. http://www.nwac.us/weatherdata/dirtyfacemtn/now/
65. http://www.nwac.us/weatherdata/dirtyfacemtn/10day/
66. http://www.nwac.us/weatherdata/lakewenatchee/now/
67. http://www.nwac.us/weatherdata/lakewenatchee/10day/
68. http://www.nwac.us/weatherdata/tumwater/now/
69. http://www.nwac.us/weatherdata/tumwater/10day/
70. http://www.nwac.us/weatherdata/stevensskiarea/now/
71. http://www.nwac.us/weatherdata/stevensskiarea/10day/
72. http://www.nwac.us/weatherdata/stevenshwy2/now/
73. http://www.nwac.us/weatherdata/stevenshwy2/10day/
74. http://www.nwac.us/weatherdata/gracelakes/now/
75. http://www.nwac.us/weatherdata/gracelakes/10day/
76. http://www.nwac.us/weatherdata/alpental/now/
77. http://www.nwac.us/weatherdata/alpental/10day/
78. http://www.nwac.us/weatherdata/snoqualmiepass/now/
79. http://www.nwac.us/weatherdata/snoqualmiepass/10day/
80. http://www.nwac.us/weatherdata/crystalskiarea/now/
81. http://www.nwac.us/weatherdata/crystalskiarea/10day/
82. http://www.nwac.us/weatherdata/crystalgrnvalley/now/
83. http://www.nwac.us/weatherdata/crystalgrnvalley/10day/
84. http://www.nwac.us/weatherdata/chinookpass/now/
85. http://www.nwac.us/weatherdata/chinookpass/10day/
86. http://www.nwac.us/weatherdata/sunrise/now/
87. http://www.nwac.us/weatherdata/sunrise/10day/
88. http://www.nwac.us/weatherdata/paradise/now/
89. http://www.nwac.us/weatherdata/paradise/10day/
90. http://www.nwac.us/weatherdata/campmuir/now/
91. http://www.nwac.us/weatherdata/campmuir/10day/
92. http://www.nwac.us/weatherdata/whitepass/now/
93. http://www.nwac.us/weatherdata/whitepass/10day/
94. http://www.nwac.us/weatherdata/mtsthelens/now/
95. http://www.nwac.us/weatherdata/mtsthelens/10day/
96. http://www.nwac.us/weatherdata/skibowlgovtcamp/now/
97. http://www.nwac.us/weatherdata/skibowlgovtcamp/10day/
98. http://www.nwac.us/weatherdata/timberlinebase/now/
99. http://www.nwac.us/weatherdata/timberlinebase/10day/
100. http://www.nwac.us/weatherdata/timberlineupper/now/
101. http://www.nwac.us/weatherdata/timberlineupper/10day/
102. http://www.nwac.us/weatherdata/mthoodmeadows/now/
103. http://www.nwac.us/weatherdata/mthoodmeadows/10day/
104. http://www.nps.gov/olym/photosmultimedia/hurricane-ridge-webcam.htm
105. http://www.drdale.com/cam/live.jpg
106. http://www.nature.nps.gov/air/webcams/parks/olymcam/olymcam.cfm
107. http://www.olsonsresort.com/webcam/cam.jpg
108. http://www.forkswa.com/webcam/netcam.jpg
109. http://www2.nature.nps.gov/air/webcams/parks/nocacam/nocacam.cfm
110. http://www.magic-mountain.net/netcam/netcam.jpg
111. http://www.magic-mountain.net/mountaincam.htm
112. http://www.methow.com/sunmtncam/viewpic.jpg
113. http://www.skitheloup.com/loupcam/image.jpg
114. http://images.wsdot.wa.gov/rweather/shermanpassmedium.jpg
115. http://www.stevenspass.com/Stevens/SiteAssets/ftp/webcam/stevenspass.jpg
116. http://images.wsdot.wa.gov/us2/Stevens/sumteast.jpg
117. http://images.wsdot.wa.gov/us2/stvldg/sumtwest.jpg
118. http://www.missionridge.com/webcam/Tmissioncam.jpg
119. http://images.wsdot.wa.gov/Snoqualmie/DennyCrk/dennycrk.jpg
120. http://images.wsdot.wa.gov/Snoqualmie/FrankFal/frankfal.jpg
121. http://images.wsdot.wa.gov/Snoqualmie/Camera/WestSumt.jpg
122. http://www.summitatsnoqualmie.com/cams/alp/alpcam.jpg
123. http://www.summitatsnoqualmie.com/cams/west/westcam.jpg
124. http://images.wsdot.wa.gov/Snoqualmie/HyakEast/HyakEast.jpg
125. http://images.wsdot.wa.gov/Snoqualmie/HyakWest/HyakWest.jpg
126. http://images.wsdot.wa.gov/Snoqualmie/Easton/easton.jpg
127. http://images.wsdot.wa.gov/us97/blewett/sumtnorth.jpg
128. http://www.cwu.edu/~weather/640x480/Ste001t.jpg
129. http://www.skicrystal.com/images/webcams/cmsnowcam1.jpg
130. http://www.skicrystal.com/images/webcams/cmsnowcam2.jpg
131. http://mms.nps.gov/mora/cam/tatoosh.jpg
132. http://mms.nps.gov/mora/cam/mountain.jpg
133. http://images.earthcam.com/spaceneedle/live.php?
134. http://images.wsdot.wa.gov/rweather/Whitemedium.jpg
135. http://209.206.166.207/
136. http://www.fs.fed.us/gpnf/volcanocams/msh/hdimages/volcanocamhd.jpg
137. http://www.fs.fed.us/gpnf/volcanocams/msh/images/mshvolcanocam.jpg
138. http://www.petries.net/troutlake/camera0.jpg
139. http://images.wsdot.wa.gov/satus/satus1.jpg
140. http://www.kgw.com/live/livecamsexternal/popuptline.jpg
141. http://www.skihood.com/cams/camimage.ashx?loc=Vista
142. http://www.skihood.com/cams/camimage.ashx?loc=Top
143. http://www.onthesnow.com/ots/imagesa/mc/1801mc.jpg
144. http://www.tripcheck.com/RoadCams/cams/GovernmentCamppid624.jpg
145. http://www.tripcheck.com/RoadCams/cams/SantiamPasspid605.jpg
146. http://www.mtbachelor.com/@@/cams/wvskycam.jpg
147. http://www.mtbachelor.com/@@/cams/pmview.jpg
148. http://www.tripcheck.com/RoadCams/cams/WillamettePasspid658.jpg
149. http://www.tripcheck.com/RoadCams/cams/ORE138-ORE230pid646.jpg
150. http://www.craterlakelodges.com/webcamcl.php
151. http://www.tripcheck.com/RoadCams/cams/I-5atExit6pid625.jpg
152. http://snow.whistler-blackcomb.com/webcam01.jpg
153. http://snow.whistler-blackcomb.com/catskinner/rendezvous.jpg
154. http://home.comcast.net/~bikodog/current.jpg
155. http://www.shastacam.com/images/rotating/camfile1.jpg
156. http://www.snowcrest.net/camera/highres.jpg
157. http://www.wrh.noaa.gov/satellite/
158. http://sat.wrh.noaa.gov/satellite/showsat.php?wfo=sew&area=west&type=vis&size=1
159. http://sat.wrh.noaa.gov/satellite/showsat.php?wfo=pqr&area=west&type=vis&size=1
160. http://sat.wrh.noaa.gov/satellite/showsat.php?wfo=mfr&area=west&type=vis&size=1
161. http://sat.wrh.noaa.gov/satellite/showsat.php?wfo=&area=nw&type=vis&size=4
162. http://sat.wrh.noaa.gov/satellite/showsat.php?wfo=&area=west&type=vis&size=4
163. http://sat.wrh.noaa.gov/satellite/4km/WR/WV4.GIF
164. http://sat.wrh.noaa.gov/satellite/4km/WR/IR4.GIF
165. http://sat.wrh.noaa.gov/satellite/showsat.php?wfo=&area=sw&type=vis&size=4
166. http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=sew&area=west&type=vis&size=1
167. http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=pqr&area=west&type=vis&size=1
168. http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=mfr&area=west&type=vis&size=1
169. http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=&area=nw&type=vis&size=4
170. http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=&area=west&type=vis&size=4
171. http://sat.wrh.noaa.gov/satellite/loopsat.php?wfo=&area=sw&type=vis&size=4
172. http://iwin.nws.noaa.gov/iwin/images/wcirloop.gif
173. http://radar.wrh.noaa.gov/radar/latest/DS.p19r0/si.katx.shtml
174. http://radar.wrh.noaa.gov/radar/latest/DS.p19r0/si.krtx.shtml
175. http://radar.wrh.noaa.gov/radar/latest/DS.p37cr/si.katx.shtml
176. http://radar.wrh.noaa.gov/radar/latest/DS.p37cr/si.krtx.shtml
177. http://radar.wrh.noaa.gov/radar/latest/DS.p38cr/si.krtx.shtml
178. http://radar.wrh.noaa.gov/radar/latest/DS.78ohp/si.katx.shtml
179. http://radar.wrh.noaa.gov/radar/latest/DS.78ohp/si.krtx.shtml
180. http://radar.wrh.noaa.gov/radar/latest/DS.80stp/si.katx.shtml
181. http://radar.wrh.noaa.gov/radar/latest/DS.80stp/si.krtx.shtml
182. http://www.intellicast.com/IcastPage/LoadPage.aspx?loc=ksea&seg=LocalWeather&prodgrp=NEXRADimagery&product=BaseReflectivity&prodnav=none
183. http://www.intellicast.com/IcastPage/LoadPage.aspx?loc=ksea&seg=LocalWeather&prodgrp=RadarImagery&product=RegionalRadar&prodnav=none
184. http://www.intellicast.com/IcastPage/LoadPage.aspx?loc=ksea&seg=LocalWeather&prodgrp=RadarImagery&product=Radar&prodnav=none
185. http://radar.wrh.noaa.gov/radar/loop/DS.p19r0/si.katx.shtml
186. http://radar.wrh.noaa.gov/radar/loop/DS.p19r0/si.krtx.shtml
187. http://radar.wrh.noaa.gov/radar/loop/DS.p37cr/si.katx.shtml
188. http://radar.wrh.noaa.gov/radar/loop/DS.p37cr/si.krtx.shtml
189. http://radar.wrh.noaa.gov/radar/loop/DS.p38cr/si.krtx.shtml
190. http://www.intellicast.com/IcastPage/LoadPage.aspx?loc=ksea&seg=LocalWeather&prodgrp=RadarImagery&product=RegionalRadarLoop&prodnav=none
191. http://www.intellicast.com/IcastPage/LoadPage.aspx?loc=ksea&seg=LocalWeather&prodgrp=RadarImagery&product=RadarLoop&prodnav=none
192. http://www.intellicast.com/IcastPage/LoadPage.aspx?loc=ksea&seg=LocalWeather&prodgrp=HistoricWeather&product=YesterdaysRadarLoop&prodnav=none
193. http://weather.noaa.gov/radar/radinfo/radinfo.html#radar
194. http://weather.noaa.gov/radar/radinfo/radinfo.html#diff
195. http://weather.noaa.gov/radar/radinfo/radinfo.html#base
196. http://www.nwac.us/education/
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198. http://www.nwac.us/calendar/
199. http://www.nwac.us/resources/
200. http://www.nwac.us/accidents/
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