Showers possible through the weekend

Thursday, June 23, 2022

Cloudy skies with temperatures around seventy degrees and relative humidities north of forty percent are over the Steamboat Springs area this Thursday mid-afternoon. I mention the relative humidity since the day feels humid compared to our normal summer days which often clock in with values below twenty percent. The moist atmosphere will support the possibility of showers today with better chances on Friday as a cool front passes through within several hours of noon. Drier air behind the front will reduce the shower chances on Saturday before they increase again for Sunday.

Currently, a leftover piece of the early week Great Basin storm is over Nevada and is being dragged eastward by another storm passing through the southern Canadian Rockies. Additionally, the clockwise rotation around a ridge of high pressure centered over Texas and extending into the Dakotas is bringing moisture from the south over our area and creating the humid conditions.

Look for a chance of showers this afternoon and tonight as a weak wave of energy rotates around the backside of the high pressure early tonight. We will see a better chance of showers on Friday as that leftover Nevada storm drags a cool front through our area tomorrow within several hours of noon.

Winds will turn to be from the current southwest to the west when the cool front passes and eventually the northwest, which will dry the atmosphere for a substantial decrease in afternoon shower chances on Saturday.

Concurrently, that Canadian Rockies storm is forecast to move into the Dakotas on Saturday, though its southward progress will be limited by the ridge of high pressure to its south. The ridge will end up being deformed; think of a bowl of jello where depressing the center of the bowl temporarily forces the jello to the sides. So by Sunday, as the Dakota storm moves into the Great Lakes, the ridge of high pressure squirts westward, allowing moist flow from the south to re-establish itself overhead. This should lead to good chances for showers on Sunday afternoon and night.

Shower chances remain going into the work week, though at much reduced levels as the stream of moisture from the south is temporarily reduced as the ridge of high pressure relocates. Check back Sunday afternoon for my next regularly scheduled weather narrative where I’ll discuss the work week weather and take a peek at the weather for the long Independence Day weekend.

Nice workweek coming up

Sunday, June 19, 2022

A mix of sun and clouds with temperatures around seventy degrees are over the Steamboat Springs area this Sunday afternoon. We may see some showers from these clouds today, though wetting rains will be hard to come by for most locations except southwest Colorado. A grazing storm then brings a weak cool front through our area tonight along with dry air that will stick around for most of the work week.

A deep and cold storm currently in the Great Basin is battling an expansive ridge of high pressure extending from central U.S. into the Canadian Plains. This is a battle the Great Basin storm will lose as we head into the first day of summer on Tuesday, which is marked by the summer solstice and the longest day of the year.  This occurs when the sun has reached its northernmost extent in the northern hemisphere, which for 2022 occurs at 3:13 am MDT Tuesday.

The currently breezy winds from the south will turn to be from the southwest and decrease as the Great Basin storm is deflected to our northwest tonight and eventually into Montana on Monday. Along with the much drier air from the Desert Southwest, a cool front tonight will drop our high temperatures into the sixties, around ten degrees below our average of 75 F, for a delightful last day of spring on Monday.

The dry air will stick around through midweek as temperatures rise to the mid to upper seventies before we may see the return of some moisture from the south by Thursday. This will result from the southerly winds ahead of a piece of the Great Basin storm left behind over California and reinforced by some incoming Pacific energy conspiring with the clockwise rotation around the ridge of high pressure to our east.

We will likely see only some increasing clouds on Thursday before the the atmosphere moistens enough for the possibility of wetting showers on Friday. Additionally, weather forecast models agree that the California storm will eventually move eastward and near our area around Friday, and we will likely see some good rain chances if and when that occurs.

So check back for my next regularly scheduled weather narrative on Thursday afternoon where I’ll discuss the rain potential for Friday and whether rain chances persist for the weekend.

Showers likely over the weekend

Thursday, June 16, 2022

Bluebird skies and temperatures near eighty degrees are over the Steamboat Springs area early this Thursday afternoon. While Friday will start similar to today, with perhaps some smoke from several wildfires in Arizona and New Mexico, we should see increasing clouds by Friday afternoon as a surge of moisture from the south moves over Colorado. Precipitation will be hard to come by to start thanks to the dry atmosphere, but becomes likely by Saturday and possibly Sunday as the atmosphere moistens.

A storm currently off the Pacific Northwest coast is forecast to elongate along the West Coast during the weekend before moving inland across the Great Basin and grazing our area on Monday. Additionally, a ridge of high pressure extending from the Southeast to the Canadian Plains is forecast to strengthen through the weekend, and the southerly flow ahead of the West Coast storm combined with the clockwise rotation around the high pressure center will force subtropical moisture currently residing over the Mexican deserts northward and eventually over our area by Friday afternoon.

Unfortunately, this southerly flow will also draw smoke from the large Black Fire in southern New Mexico and the Fish Fire across the state line in Arizona, and possibly the Midnight Fire in northern New Mexico, northward and over our area for at least tonight and tomorrow. With this in mind, I have made two changes to the SnowAlarm site by placing the PurpleAir air quality indicator from the Routt County Courthouse back on the home page and grabbing the NOAA smoke plume forecast maps which are run out to 48 hours four times a day.

While Friday will start similar to today, other than the possibility of some haze due to smoke, clouds should increase in the afternoon as moisture moves northward. Storms that form will initially produce more wind than rain as it will take some time for the lower atmosphere to moisten, so the better chance for wetting rains waits until Saturday afternoon and evening, and possibly Sunday.

And along with the clouds, high temperatures will drop from around ten degrees above our average of 74 F today and tomorrow to around average, or even several degrees below for the weekend.

While weather forecast models agree that the West Coast storm will graze our area, there is disagreement on how close it will get, and that will influence the chance of precipitation on both Sunday and Monday. The European ECMWF keeps the storm further away, which allows for more showers on Sunday and a dry Monday, while the American GFS has the storm moving close enough to sever the moisture plume for a drier Sunday before increasing shower chances on Monday as the storm moves by.

So stay tuned to my next regularly scheduled weather narrative on Sunday afternoon where I’ll discuss that grazing storm for Sunday or Monday and what currently looks like nice weather for the remainder of the work week.

Big cooldown on Tuesday

Sunday, June 12, 2022

Abnormally hot temperatures in the mid-eighties, mostly sunny skies and breezy winds from the southwest are over the Steamboat Springs area this Sunday afternoon. Though temperatures will decrease a bit on Monday, the winds will increase ahead of a strong but mostly dry cold front that will bring much cooler temperatures into our area for Tuesday and Wednesday. Warmer temperatures return for the end of the work week along with increasing rain chances as we head into the weekend.

The weather over the West is being squeezed between a strong storm in the Gulf of Alaska and a building ridge of high pressure over the Southeast. While the Pacific Northwest is currently seeing cold and rainy weather, we will be grazed by a couple of waves rotating around the southern end of the storm on Monday and Tuesday nights. The first wave will bring a strong cold front through our area very early Tuesday morning, though moisture will be sparse as most of the storm is deflected to our north by the building ridge of high pressure over the Southeast.

For the rest of today, look for high temperatures similar to the high temperature of 87 F yesterday at the Bob Adams airport, which is fifteen degrees above our average of 72 F. Though high temperatures will decrease on Monday by about ten degrees as the cold front approaches, winds will increase with gusts around 40 mph likely.

There may be some very early morning showers Tuesday when the front moves through, but precipitation will be hard to come by as the cold and relatively dry air moves into our area. High temperatures on Tuesday look to be in the low sixties, which represents a twenty-five degree cooldown from today.

A reinforcing cold front is timed for Tuesday night with no precipitation expected. However, the low temperatures for Wednesday morning will be flirting with the freezing mark, so those gardeners who have not followed the plant-after-Father’s-Day rule of thumb for the Yampa Valley may consider covering their newly planted gardens or bringing easily moved plants indoors.

Another Pacific storm currently near the Aleutian Islands is forecast to replace the departed Gulf of Alaska storm by midweek before elongating along the West Coast through next weekend. The southerly flow ahead of the storm will encourage the ridge of high pressure over the Southeast to move westward, allowing above-average temperatures to return starting Thursday.

By the end of the work week, weather forecast models agree that moisture from the south will be funneled northward thanks to the southerly flow ahead of the West Coast storm and the clockwise rotation of air around the westward moving Southeast ridge of high pressure. This has the hallmarks of a North American Monsoon moisture surge, though it is too early to say whether this pattern is a hint of what’s to come later in the summer.

So enjoy the cooldown for a couple of very pleasant days on Tuesday and Wednesday, and check back for my next regularly scheduled weather narrative on Thursday afternoon where I’ll discuss the possibility of wetter weather returning for the weekend.

Summertime temperatures for the dry weekend

Thursday, June 9, 2022

Some sun and clouds with temperatures in the upper-seventies are over the Steamboat Springs area this Thursday mid-afternoon. If we don’t reach eighty degrees later today when the clouds clear, we will tomorrow, with even warmer temperatures in the low eighties for the weekend.

We have a relatively simple weather forecast for a change as a ridge of high pressure forecast to be centered over the Four Corners this weekend builds ahead of a storm developing in the Gulf of Alaska. The clouds this morning were the result of a cool front that stayed to our north, so expect clearing skies for the rest of the day and temperatures threatening the eighty degree mark.

Friday and the weekend will be several degrees warmer than today, which would be over ten degrees above our average of 71 F, with plenty of sunshine. Other than a pleasant summertime weekend, there is not much weather to speak of until a quick moving storm currently near the Dateline mixes with some of that Gulf of Alaska storm on Saturday and crosses the West Coast on Sunday.

It looks like we will have more dry air and windy conditions from the southwest by Monday ahead of the storm crossing the Great Basin. Weather forecast models agree on a strong cold front moving through our area around Monday night, though disagree on how much cold air and moisture makes it into north-central Colorado and how long the cool air sticks around after Tuesday. Enjoy the summertime weekend, and check back on Sunday afternoon for my next regularly scheduled weather narrative where I’ll discuss the coming early work week cold front.

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23 February 2021

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