KodytheWXGuy wrote:
By 2-6pm this afternoon, mountain snurfall will be pretty widespread along and west of the continental divide and in SE Wyoming where it may start off as rain initially in Cheyenne and then changeover pretty quickly.
Clouds will rapidly increase today for the front range & eastern plains of Colorado, SE Wyoming and the western Nebrasky pandyhandle along with the wind. Precipitation will be developing along and behind the cold front on and after 5pm.
Snow level will be around 6000 feet initially and then will drop pretty quickly; so any rain that starts along the front range will probably changeover soon after precipitation starts falling.
Highest accumulation potential is in the mountains, foothills west of I-25 especially in and south of Boulder County, and going into the Denver metro (especially the south burbs) and onto the Palmer Divide as well as the Raton Mesa in southern Colorado.
**THERE WILL BE POSSIBLE IMPACTS TO YOUR MONDAY MORNING COMMUTE IN THE MOUNTAINS AS WELL AS IN AND SOUTH OF DENVER. PLAN ACCORDINGLY. YES I AM YELLING.**
Open waves with northwesterly winds generally dry out the northern front range pretty quickly. This is called downsloping. So, while there certainly could be a period of rain/snow across the northern front range, I expect accumulation across Larimer (below 8000 feet), Weld, and Morgan Counties and up the I-76 corridor north and east of Denver to be on the light side.
Precipitation will slowly dissipate throughout the day on Sunday as the center of low pressure quickly exits the region to our south and east. It will be a cold and blustery day on Monday. Highs mainly in the 30s and 40s along the front range & eastern plains and the western slope. 10s, 20s, and 30s in our mountains.
My attention will turn to our second storm! Impacts will begin being felt as early as Tuesday night, and will really ramp up Wednesday into Thursday with outside probabilities of precipitation lasting past Friday and into next weekend.
It’s one of these storms where I have looked at all the forecast model data, do a double take, and then explore every conceivable reason why they could all be wrong.
I say this, because if the current trends continue, we could be entertaining the idea of not only the first widespread significant snowstorm of the season, but the outside probability of approaching snowfall records for November that have stood since the 1940s. Again, I emphasize here, this is all **possibility and NOT certainty** – at least for right now.
Lots of variables in play. I’ve said it before, but here’s the rundown again:
1. It’s a colder storm.
2. The initial cold front is expected to come through Tuesday night ahead of the main trough.
3. The main trough will dig into the four corners region Wednesday and form a cut off low. A cut off low is a storm that gets “cut off” from the main jet stream flow. This slows the storm down to a crawl, and becomes heavily influenced by its surrounding environment.
4. With cut off lows, if they track in the right spot, this is a scenario that dumps heavy precipitation along the front range and the eastern plains. Forecast ensemble data supports heavy precipitation in the mountains too due to the potentially longer duration of the storm.
So, duration of the storm, and its exact track will be EVERYTHING with this storm. I’ve got a lot of work to do. Again, we’re looking at the Tuesday night – Thursday window with the potential for lingering impacts through Friday and into the upcoming weekend. No need to panic. No need to raid grocery store shelves. There’s plenty of bread and milk for everybody you little sinners.