image: Potential cold front hits SundayDenver Forecast

Potential cold front hits Sunday

Record heat Thursday, with more records to fall – potentially – Friday and Saturday before a cold front slides through Sunday. Thursday his 90 degrees to set a new record high for the date, plus added another 90-degree day to the count of them this year which now is 75 and the most on Denver's record for any year. Friday to hit the 90s again, and near to 90 Saturday with mostly quiet weather otherwise. Sunday, however, may bring a cold front to knock us off the hot streak. Euro Sunday aftern
State of the Atmosphere
The State of the Atmosphere, Monday, September 21st, 2020
As we've been tracking since last winter, the forecast La Niña has established itself in the equatorial Pacific, and will be a big driver of our weather in the coming weeks and months ahead. You can read about what implications that may have on our winter patter in our most recent Insider post here: La Niña status and an updated look at analog years for the upcoming winterWe’ve been writing about La Niña for months now. It is established, and is getting stronger. You can see the sea surface an
Weather5280 Insider
La Niña status and an updated look at analog years for the upcoming winter
We've been writing about La Niña for months now. It is established, and is getting stronger. You can see the sea surface anomalies trend colder (bluer) during the past several weeks, not only at the surface: But beneath the surface too: Most models continue to show La Niña prevailing for the next several months. Here is the current sea surface temperature anomaly map, showing the budding La Niña: So, where does the current situation stack up in relation to past years?  Well, our analog lis
image: The State of the Atmosphere: Sunday, September 13th, 2020State of the Atmosphere
The State of the Atmosphere: Sunday, September 13th, 2020
The state of the atmosphere has me incredibly grateful to live where we do this week, with fires ravaging the west, and a very active tropical season continuing in the Atlantic. Wildfires in the west Wildfires in the west continue to cause incredible devastation, as more than 4 million acres have now burned across California, Oregon, and Washington this year. The deadly fires have claimed the lives of at least 23 people [https://www.nytimes.com/2020/09/13/us/oregon-wildfires-california-washing
Climate
Here's the long list of weather records broken in Denver over the last five days
It's been an incredible and unforgettable five days of weather along the Front Range of Colorado and across the Eastern Plains. In the last five days Denver has either set or tied two daily record highs, set a new monthly record high (of 101°F!), tied the earliest freeze on record, and set or tied two record lows among a myriad of other mind-blowing stats. Here's the list, hold on! September 5th: Latest 100°F reading on record for Denver With the temperature breaking 100°F on Saturday at Den
Denver Weather
First snow of the season in the books for Denver, ties second earliest on record
It's official, Denver picked up 1.0" of snow at DIA on Tuesday marking the first measurable snowfall in September since 2000, and the tying the second earliest snowfall on record, set first in 1962. Here is the almanac data for Tuesday, September 8th, 2020: First snowfall prediction contest comes to a close A record 43 of you picked September 8th as the first official snowfall in this year's Snowfall Prediction Contest [https://www.weather5280.com/contests/first-snowfall-prediction-contest-d
Storm Update
Window for meaningful snow opens soon, record cold forecast tonight
Everything remains more or less on track, as cold air, rain, and snow have transformed our area from summer's smoky grip to a damp, wintry day. With over 0.5" of precipitation so far at DIA, this has become one of Denver's wettest days of the year , a strong tell of what kind of summer it's been! Temperatures in Denver have been in the low to mid 30s this afternoon, some 60°F cooler than our highs across the city yesterday. Looking
Denver Forecast
Evening data continues to point to low confidence snowfall forecast, high confidence in jarring temperature change
We thought we'd take a few minutes tonight to show some of the latest data as we wait for the cold air to arrive and eventual rain and snow. The first wave of cooler air moved through mid afternoon across Northern Colorado , with colder air starting to take hold at this hour. Overall we don't see much of a need to change from our forecast issued earlier today [https://www.weather5280.com/2020/09/07/3-things-to-kn
Denver Weather
Cold front begins its push through Colorado
It's been yet another remarkable day for weather across Northern Colorado. A quick update this afternoon on the progress of our system on the way, set to deliver wind, rain, snow, and cold temperatures to the state. The initial front came rushing across the Colorado/Wyoming border early this afternoon, you can see it dropping south and beginning to thin the smoke that has been parked over Fort Collins all da
Denver Snow
Three things to know about our incoming storm
We've posted extensively about the storm set to hit Monday and last through Wednesday, the three main takeaways continue: Cold, snow, and wind. Cold Temperatures will plummet, and may rival the biggest September temperature drops on record. Record cold is likely for Tuesday and Wednesday across the area. The chart below shows how much colder than the current record low for Monday night and Tuesday night temperatures are expected to be: If you haven't planned to cover gardens, bring in potted
Weather5280 Insider
Freeze Warnings in place for portions of Eastern Colorado ahead of dramatic weather change
Through record heat we have been tracking a dramatic cool down set to arrive tonight to northern Colorado and by early Tuesday morning to Southern Colorado. The change will also bring the season's first snow for some, especially those closer to the Front Range and along the Palmer Divide. We will have more on the snowfall outlook later today, so please look for that. For now a quick post on the cold that's expected. Below are the current hazards issued by the NWS. The dark purples are Freeze
Weather5280 Insider
Storm will deliver much needed moisture to drought-stricken Colorado and the Plains States
This week we'll see much needed moisture fall across many states that have dealt with drought conditions all summer long. Some will fall in the form of rain, and for some in the form of snow. The areas outlined in the dashed box below will see the greatest moisture potential early this week: This roughly corresponds to the same area below. These are probabilities for 0.5" of liquid (as rain or snow) in the coming week. Many areas will see upwards of a 80% chance for this to occur if current mo
Record Heat
Another day of record-breaking heat in the West, now how cold will it get in Denver by Tuesday?
It was another stunning day for temperature records across the Western United States, including across Colorado. Denver was spared setting yet another couple of records today, likely thanks in part to the Cameron Peak Fire smoke plume that moved over the city early afternoon and helped keep temperatures just a hint cooler than they otherwise might have been. Still, Denver tied the record high for the date with DIA hitting 97°F degrees this afternoon, a record first set back in 2013. The ma
Denver Forecast
Model inconsistencies remain with incoming snow, Winter Storm Watch posted for the Denver area
Although the cold air is on track and hasn't wavered, the snowfall projections are wildly changing in totals and locations due to models' struggles to consistently project the upper-air flow. For example, let's look at the European Ensemble forecast for the middle atmosphere for Wednesday morning. Let's compare this particular model suites projection from its Saturday morning run to its early Sunday run. Note that the middle atmosphere has a closed low in Sunday's update versus the open trough
Climate
It's been a long time since Denver's seen measurable snow in September
Snowfall in Denver has not been measured in any September since 2000, that's quite a snow drought for the month, which actually averages 1.0" of snow since record keeping began. However, it appears that some of us will be able to measure snowfall this Tuesday , whether or not the city "officially" measures any remains to be seen
Climate
Denver hits 101°F, marking the hottest temperature on record for September with snow in the forecast Tuesday
As we outlined yesterday, numerous temperature records are at stake in the coming days for Denver. Today we set three of them. Latest 100-degree reading on record for Denver With the temperature breaking 100°F this afternoon at Denver International Airport, September 5th becomes the latest 100-degree day on record for the city in 146 years of record keeping. Prior to 2019 the latest on r
Denver Snow
Early season snow could wreak havoc on Front Range trees, deliver first measurable snowfall to Denver in September in 20 years
We continue to track a potent early season (late summer?) wintry blast which is set to arrive in Northern Colorado Monday night, and bring with it record-breaking cold and the potential for the first accumulating snow event of the season to the Front Range and urban corridor. This post will focus on the snow potential and timing of this system. If you are looking for information around some of the temperature records Denver is set to break in the coming days, you can find more on that here [ht
Climate
Denver could set numerous temperature records in the coming days
Let's put the snow conversation to the side for a moment and take a look at some of the remarkable temperature records Denver is likely to challenge or break in the coming days. Most 90-degree days in a year Today Denver broke 90-degrees for the 70th time in 2020. That's just three shy of the record for 90-degree days set back in 2012. The c
Snow
A heavy snow event is not off the table, measuring the probabilities as winter in summer takes aim at Colorado
With each model run we keep expecting them to backoff their snowfall output. There's plenty that's eyebrow raising about what models are currently forecasting for Colorado in this upcoming week. Looking at 500mb temperatures, ground temperatures, speed and strength of the trough... A LOT would have to line up for the type of extreme weather event to take place this week that many operational weather models continue to predict. Currently much of the modeled snowfall maps are at odds with every ot
Insider Pro Update
Significant cold with moisture on way for next week
Pro subscribers, a heads up in regards to the significant cold on the way for September 7th to 10th and some details on the potential for snow and rain too. First off, the cold. A very strong cold front will deliver a 40 to 60 degree temperature drop from Labor Day to the days that follow. The season's first killing freeze is possible with this airmass. Record cold will be possible in some locations by Wednesday morning. Speaking of Wednesday, the 9th, here is a look at possible morning temp