Heavy rain with life threatening flash flooding will continue forSouthern California into Tuesday.Heavy Snow to impact the major mountain ranges from the Sierra Nevadato the Central Rockies through mid-week.Temperatures will continue to run well above average from the GreatPlains to the Appalachians with record breaking warmth for parts of theUpper Midwest.A slow moving and relatively narrow axis of anomalous moisture willcontinue to focus across Southern California over the next 12 to 24 hours,maintaining a significant threat for life threatening flash floodingacross the Transverse Ranges and adjacent locations. Areas of moderate toheavy rain are expected to remain in place near a cold front crossing thesouthern coast of California, just ahead of an upper level trough axis.Additional rainfall totals through Tuesday of 1-3 inches are expected forthe urban corridor from Los Angeles to San Diego and into the foothills ofthe Transverse Ranges, with locally higher rainfall totals in areas ofhigher terrain. This will fall on top of the 5 to 10+ inches of rain whichhas impacted Southern California over the past 48 hours. Flooding ofstreams and rivers along with mudslides are expected to remain a threat.While rain will continue for Southern California on Tuesday, the intensityis expected to be lighter than what occurred over the weekend as the stormsystem moves east into the Desert Southwest, but the potential for flashflooding and higher rainfall rates will expand into western Arizona,southern Nevada and southwestern Utah.Heavy snow and strong winds will continue to generate near impossibletravel conditions for elevations at/above 5000-7000 ft for southernportions of the Sierra Nevada into the mountains of central Nevada. As theupper trough and surface cold front shift eastward through mid week, heavysnow will spread eastward into the higher elevations of Utah, Idaho,Wyoming, Colorado and New Mexico.The central and eastern U.S. will remain fairly dry after a powerful stormsystem exits from the Southeast into the western Atlantic tonight. Upperlevel ridging over the central U.S. will continue anomalously warmth forthe Northern/Central Plains and Upper Midwest through Wednesday. Hightemperatures in the 40s and low 50s are expected for the Upper Midwest onTuesday and Wednesday, 20-30 degrees above average. which will likelybreak daily record high temperatures. Highs temperatures generally fromthe Rockies to the Northeast will be above average and mild.