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<br />The storm of 6-8 January clearly depicts the supercooled water transitions <br /> <br />in cutoff storms. Three distinct areas with different supercooled water charac- <br /> <br />teFistics were observed~ The pre-frontal. zone, the post-frontal/pre-trough <br />region, and the post-trough area. Superc.ooled v.[ater was often p'resent within. <br />the pre-fr'ontal region. Values of supercooled water up to 0.60 mm v/ere found in <br />the pre-frontal orographic cloud, with embedded convection producing peaks in <br />excess of 0.70 mm. Precipitation was generally less than 1 mmh-1. The duration <br /> <br />of pre-frontal supercooled water varied from 3 to 30 hours, depending on the <br />trajectory of the cutoff low. Stoy'ms where the center passed from v/est to east <br /> <br />over the project area had longer durations of supercooled water (> 10 hr). <br />Cutoff storms that passed south of the project area had shorter durations of <br /> <br />supercooled water (< 6 hr). <br /> <br />After the frontal passage super'cooled water was produced pr'imarily by con- <br />vection. This convective period lasted until the passage of the core of the <br />low, typically 8 to 17 hours, depending on the distance between the front and <br />the trough. Supercooled water was generally 0.05 to 0.20 mm with instantaneous <br />values as high as 0.50 mm in convection. The largest amounts of preC"ipitation <br />were associ ated with the frontal passage, with rates ranging from 2 to 9 mmh-1. <br />Precipitation \'/as generally less than 1 mmh-1 after the front. Precipitation <br /> <br />and supercooled water usually dissipated with the passage of the trough. <br /> <br />E. Developing storm in northerly flow: 1-2 February 1985 <br /> <br />A large amplitude ridge situated in the eastern Pacific, near 1400 W, was <br /> <br />present during the 1-~ February 1985 storm. A strong short wave had moved over <br />the ridge and dug down the east side of the ridge over the project area. The <br /> <br />storm brought cold temperatures and snow to very low elevations. <br /> <br />22 <br /> <br />I <br />..J <br />