Storm Day, Powder Day, FRIDAY

Posted Thursday, March 7th, 2019 by Taylor McCorkle

We’re on track for an epic end to your work week (or early start to the weekend) as another trough moves through the area, bringing you guessed it, MORE SNOW!

In the wake of the atmospheric river that came through the region, resorts reported new snowfall totals ranging from 4-15″! Not bad! The good news is, more is on the way.

Snow reports courtesy of onthesnow.com
Snow reports courtesy of onthesnow.com

Today and tomorrow:
A weak shortwave moved through the state today, bringing scattered showers to the valleys and mountains. A few inches of the good stuff has fallen in the mountains since midnight, and a few more are expected before the evening.

Our sights are currently set on the next big snow maker, which is an upper-level trough that is making its way inland from the coast of California.  This system is much colder than the last few we have experienced. It is expected to produce persistent snow showers in the mountains for much of the day tomorrow ahead of the cold front. The plot shown below illustrates the trough and lift (shaded) associated with it. The forecast is valid tomorrow at 10 am, which is prior to the frontal passage.  Notice the winds are still out of the southwest in Utah.  A frontal passage is marked by a north-northwesterly wind shift.

NAM 3 km forecast of 500 mb heights, winds and vorticity (shaded). Courtesy of tropicaltidbits.com
NAM 3 km forecast of 500 mb heights, winds and vorticity (shaded). Courtesy of tropicaltidbits.co

Expect precipitation to start falling in the mountains as snow and scattered rain showers in the valley around midnight.  Much of the precipitation will fall prior to the frontal passage, which is set to arrive around 7 pm tomorrow evening. After that, freezing levels will plummet to the valley floor and another push of precipitation will move through along the frontal boundary.  After the frontal passage, orographic effects will play a role in producing extra snowfall.  This bonus-time snowfall will be of the light and powdery variety.  Below is a forecast of radar reflectivity through Friday night. Green colors represent rain while the blues indicate frozen precipitation.

Radar reflectivity forecast valid from 2 pm today through ~2am Saturday morning via tropicaltidbits.com
Radar reflectivity forecast valid from 2 pm today through ~2am Saturday morning via tropicaltidbits.com

Here’s what our thoughts are on snowfall totals through Friday night:

Cottonwoods: 18-24″
Park City: 12-18″
Northern Utah/Ogden: 14-20″
Sundance/Southern Wasatch: 6-12″

In summary, tomorrow should be an awesome storm day with free refills! Get out and enjoy it!

-Taylor

 

Leave a Reply

Your email address will not be published. Required fields are marked *