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No references found			[ILLUSTRATION OMITTED] Just two days later, an upper-level low moving through the base of the trough tracked inland from southern California bringing another round of precipitation to the Mojave Desert on December 17th. A snowy December in Las Vegas, Nevada by Storm Data In meteorologist terms, the quick weather turnabout is the result of a cold front associated with an upper-level low pressure system in the southeast Gulf of Alaska. Forecast: back-and-forth mix, with springtime in between by The Register-Guard (Eugene, OR) As the storm dropped through California, a closed upper-level low formed. Storm data and unusual weather phenomena by Storm Data			Upper Silesian Agglomeration of Cities Upper Silesian Coal Field Upper Silesian Operation of 1945 Upper Silurian Upper Sioux Agency State Park Upper Souris National Wildlife Refuge Upper Thracian Lowland upper transit Upper Triassic upper trough Upper Volga Lakes Upper Volga Reservoir Upper Volta upper winds upper-air chart upper-air disturbance upper-air observation upper-air sounding upper-arm circumference upper-atmosphere dynamics upper-level anticyclone upper-level chart upper-level cyclone upper-level disturbance upper-level high upper-level low upper-level ridge upper-level trough upper-level winds uppercut upping block Uppsala Uppsala, University of Uprava Blagochiniia upright Upright Database Technology AB upright piano Uprising of Arabian Tribes in 632–633 Uprising of st. George's Night of 1343–45 Uprooting uprush Uprush and Backwash UPS Upsala upsample upscale upset upset price upset welding upsetted moraine Upsetting			upper-arm circumference Upper-atmosphere dynamics Upper-Band Sub-Array Upper-Body Muscular Strength and Endurance Upper-Bound Elemental Technique Upper-case upper-case letter upper-class upper-class upper-class upper-crust upper-crust upper-division Upper-Division Writing Examination Upper-Division Writing Requirement Upper-Edge Cell Upper-End Vertebra Upper-Inner Quadrant Upper-Layer Identifier Upper-Left Corner upper-level Upper-Level Anticyclone Upper-Level Anticyclone upper-level chart upper-level cyclone upper-level disturbance upper-level high Upper-Level Jet upper-level low upper-level ridge upper-level trough upper-level winds Upper-Limb Somatosensory Evoked Potential upper-lower-class Upper-lung Fractal Dimension upper-middle-class Upper-Normandy Upper-Tract Urothelial Cancer Upper-triangular Upper-triangular matrix Upper/Lower Perfusion Ratio uppercase uppercase Uppercase and Lowercase uppercased uppercases uppercasing upperclassman upperclassmen uppercut uppercut uppercuts uppercuts uppercutted uppercutted uppercutting uppercutting UpperEx National Outreach Coalition

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