Sunday, November 18, 2018
After several inches of snow fell at the Steamboat Ski Area yesterday afternoon and evening, the next chance of snow in the Steamboat Springs area occurs late on Thanksgiving day and again around Saturday.
Skies will clear this Sunday, with temperatures staying several degrees below our average high of 39 F as a ridge of high pressure moves from the West Coast to the Rockies by midweek. Some energy traveling down the east side of the ridge from the Canadian Plains will graze northern Colorado starting tonight, and other than some clouds and continued below average temperatures on Monday, no additional precipitation is expected.
Dry air overspreads Colorado by Tuesday and Wednesday leading to some gorgeous warm late-fall weather for Opening Day at the Steamboat Ski area on Wednesday. And for those keeping track, the weather forecast model differences discussed in last Thursday’s forecast have been resolved in favor of the European ECMWF which captured the upcoming unsettled weather a day earlier than the American GFS.
So an incoming Pacific storm crosses the West Coast by Wednesday and quickly travels across the Great Basin, first bringing clouds early on Thanksgiving Day and then snows by later in the day that continue overnight This is not a cold system, but we should see snow down to the Yampa Valley floor, with possibly 3-6” at mid-mountain by Friday morning.
Even though the snows may not completely stop, we will be in between storms during the day on Friday as another storm that forms in the Gulf of Alaska around midweek quickly follows our Thanksgiving Day storm. This one will be stronger, colder and longer-lasting, with moderate to heavy snows possible starting late Friday or early Saturday and continuing into the evening. Weather forecast models have not settled on the exact track of the storm yet, but 6-12” of additional snow at mid-mountain is possible during the day Saturday, which will be reported Sunday morning.
We may see some clearing on Sunday along with cool temperatures before another possibly weaker storm is advertised for early in the following work week.
Thursday, November 15, 2018
Other than a weak storm for Saturday, warm and sunny late fall weather looks to usher in Opening Day at the Steamboat Ski area, which is scheduled for the Wednesday before Thanksgiving.
The beautiful weather this Thursday continues on Friday for Steamboat Springs, with even warmer high temperatures that will be five to ten degrees above our average of 41 F. Our best chance for snow will occur from Saturday afternoon through the night as s small storm currently in British Columbia moves across our area in northwest flow. Cooler air begins moving in early Saturday with snow showers most likely from the afternoon through the night. I would expect only 1-4” at mid-mountain by Sunday morning, with the best snows falling along the Wyoming border.
The sun returns starting Sunday, and after a chilly start, warming will occur first at the higher elevations during the day followed by the lower elevations by later Monday. Gorgeous warm and sunny weather will continue for Tuesday at which point substantial disagreement in the weather forecast models leave hope that we’ll see the chance of snow around Thanksgiving or the following weekend. But the hope is based upon an abrupt change in the prognosis of the usually consistent ECMWF and is at odds with the American GFS. For what it’s worth, the GFS shows a continuation of the dry and sunny weather for Thanksgiving and the following weekend, so stay tuned for my Sunday forecast on how this difference is resolved.
Sunday, November 11, 2018
The light snow falling in Steamboat Springs this Sunday won’t accumulate to much, but a reinforcing surge of cold and dry air tonight means a cold start to the work week before warmer and sunnier weather returns.
Currently, a large trough of cold air sits over much of the United States, save for a ridge of high pressure over the West Coast, where hot and dry weather and the seasonal easterly Santa Anna winds have fueled extreme wildfire behavior in California. This weather pattern will bring a cold front through Colorado later today with another windy day in California before incoming Pacific energy forces the ridge of high pressure eastward.
The cold front means a quite cold Monday with both low and high temperature around twenty degrees below our average low of 18 F and average high of 46 F, despite the presence of sun. A clear Monday night will once again keep similar low temperatures around for Tuesday morning before the flattening ridge of high pressure moves towards our area, with some warming at low elevations during the day but more at higher elevations.
Continued sun and warmer temperatures with both highs and lows around average are advertised for Wednesday before some energy traveling over the top of the ridge mixes with some cold air from the Canadian Plains and clips northern Colorado on Thursday. This probably will not affect temperatures much, but we may see some clouds and breezy northwest winds.
The ridge briefly rebounds over the west for Friday before we are similarly clipped again by a passing storm for Saturday. And again, the ridge briefly rebounds for Sunday for more nice weather.
Meanwhile, another round of incoming Pacific energy approaches the West Coast mid-weekend and the interaction of this energy and the ridge of high pressure is uncertain. Weather forecast models indicate that some energy is likely to penetrate inland and move across the Great Basin early in the next work week, though any storms carried along look to be relatively warm and weak heading into Thanksgiving.
Thursday, November 8, 2018
A couple more cold fronts for this Thursday and Sunday will cross the Steamboat Springs area before significant warming and drying occurs during the upcoming work week.
Behind the first cold front today that is leaving several inches of snow at the Steamboat Ski area, the skies should clear and the sun will reappear for Friday and the first part of Saturday. The lack of clouds tonight and the cold airmass will make for a cold start to Friday morning with temperatures falling below our average low of 20 F. The ever-lowering sun angle will make it difficult for temperatures to recover to our average high of 46 F on Friday.
We’ll see another chilly morning Saturday, but we should be much closer to our average high as a warmer airmass briefly settles over our area, even as high clouds begin to ovespread northern Colorado ahead of the next cold front.
Timed for Veterans Day on Sunday, the cold front will contain some very cold western Canadian air, but limited moisture, so only several inches of snow are expected through the likely raw day.
A ridge of high pressure will build eastward starting early in the work week and is forecast to reside over the Rockies by midweek. Temperatures will be slow to recover on Monday in the cold airmass, but there should be some warming, especially at the higher elevations on Tuesday, and warming at all elevations, along with more sun, by Wednesday.
A cool front that is currently forecast to be quite weak may brush northern Colorado around Thursday, and briefly interrupt the pleasant and seasonable weather that looks to continue into the following weekend. Since the opening of the Steamboat Ski area follows that weekend, I’ll mention, with the usual uncertainty disclaimer, that long-range forecasts indicate another storm may approach the West Coast around the end of the weekend.
Sunday, November 4, 2018
The third and most powerful storm in this cycle that began last Thursday will start moderate to heavy snows over the Steamboat Springs area by this Sunday afternoon. Snow showers will taper off later Monday and linger through Tuesday before a colder and drier airmass moves over our area around midweek and heading into next weekend.
I’d like to mention that my timing in the last forecast discussion was close on the second storm in this series, which started Friday night, but not quite right, as we were short of my forecast (4-8” at mid-mountain and 6-12” up top) by first thing Saturday morning. However, the heavy showers starting Saturday morning behind the front in favorable cool and moist northwest flow brought the storm totals up to 6” at mid-mountain and 11” up top by the afternoon. For those skiers who base their ski day plans on the early morning ski report, take note!
In any event, I expect good things from the storm starting today in continued cool and moist northwest flow, with snows becoming moderate to heavy by sunset and continuing into the overnight hours. The bulk of the expected 6-12” at mid-mountain and 8-16” up top should occur overnight, but showers will continue through Monday as they taper off. Travel over the passes will once again be difficult, and high snowfall rates may make travel difficult at times even at the lower elevations.
Light and intermittent snow showers will persist for Tuesday before a series of fairly dry cold fronts pass through the region, currently timed for Wednesday, Thursday night and Saturday night. It will be cold enough for snow down to the Yampa Valley floor, though the dry nature of the fronts mean we’ll see only brief and likely non-accumulating snow showers as they pass.
Warmer and drier weather is advertised for the beginning of the next work week as the ridge of high pressure off the West Coast moves inland and over the Rockies. But more incoming Pacific energy behind the ridge keeps it moving to the east, with another round of active weather possible behind the exiting ridge.