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On long routes weather changes for the worse mustbe anticipated. Wet or icy rock can make an easy routealmost impassable: cold may reduce climbing efficiency,snow may cover holds, a cloudy night may be too darkto travel, an enshrouded glacier too foggy to cross. Smooth rock slabs become treacherous when wet,or iced after a freeze and rain. Holds may be hidden inthe rime that has condensed from an icy mist. Wind and Barometer Indications for the United States Barometer Wind (inches at sea level) Weather indicated SW to NW 30.1 to 30.2, steady Fair, with slight temperature changes, for 1 to 2 days SW to NW |
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