tag:blogger.com,1999:blog-6168620747792092240.post6997013609323057500..comments2024-03-27T15:09:59.039-06:00Comments on Wasatch Weather Weenies: A Primer on Atmospheric RiversJim Shttp://www.blogger.com/profile/15799757451626876963noreply@blogger.comBlogger3125tag:blogger.com,1999:blog-6168620747792092240.post-30463048093085690902016-12-07T13:23:54.446-07:002016-12-07T13:23:54.446-07:00In short, fingers crossed, depending on which reso...In short, fingers crossed, depending on which resort you work/play at . . . Miranda Menzieshttps://www.blogger.com/profile/10668742699633995753noreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-2821201086825656842016-12-07T10:24:30.852-07:002016-12-07T10:24:30.852-07:00There is a strong contrast in temperature across t...There is a strong contrast in temperature across the system, so small changes in position can make a big difference on snow level. This is one of several reasons why one needs to be careful about pinpointing snow level so far in advance. In addition, cooling from melting snow varies with precipitation intensity, and that is also hard to nail down. <br /><br />Airmass origin is a major reason for the warmth. There are probably some additional effects (heating due to condensation over upstream ranges, etc.), but that's the main one. <br /><br />Jim<br />Jim Shttps://www.blogger.com/profile/15799757451626876963noreply@blogger.comtag:blogger.com,1999:blog-6168620747792092240.post-88896845638199521942016-12-07T10:22:10.476-07:002016-12-07T10:22:10.476-07:00The rain/snow line has got my attention big time. ...The rain/snow line has got my attention big time. You indicated yesterday the LCC guidance wasn't that reliable 48/72 hours out. I've come to prefer the NAM4 for snow/precip, but don't know about its wetbulbzero estimates. For the sake of conversation it increases from 4400 ft 5am Fri to 7900 ft 11am Fri, drops to 6800 ft 2pm Fri increases to 8000 ft 5pm Fri. Corresponding rain/snow line is maybe 1000 feet lower. Seems like you take this w a grain of salt. Still, can we conclude rain/snow line will rise throughout the day Friday, perhaps reaching 7000 ft or higher?<br /><br />Is the reason for the rain/snow mix simply that the storm originates near Hawaii in the sub-tropics, hence Pineapple Express, where the air is warmer and that warm air is being transported into Utah? Or is it more complicated.Peter Donnerhttps://www.blogger.com/profile/07658400081780668829noreply@blogger.com