All posts by Thornton Weather

ThorntonWeather.com is your local source for live Thornton, Colorado weather conditions and news!

Early risers Saturday to be treated to ‘super-sized’ total lunar eclipse

The last lunar eclipse until 2014 will be visible along the Colorado Front Range early Saturday morning.
The last lunar eclipse until 2014 will be visible along the Colorado Front Range early Saturday morning. (ThorntonWeather.com)

If you can get yourself out of bed early in the morning on Saturday, December 10, 2011 you will be treated to the last total lunar eclipse for nearly three years.  For viewers in Thornton and along the Colorado Front Range, the event will be relatively quick but punctuated by a setting moon with the Rocky Mountains in the foreground.

Saturday morning the moon will be passing through the lower half of the Earth’s shadow just before it sets in the west at 7:12am MST Saturday.  The low hanging moon will appear much larger than normal bringing what NASA calls a ‘super-sized’ eclipse.

Because the moon will be low on the western horizon, finding a good spot to watch it will be critical.  In Thornton, visitors to our Facebook page have suggested near the Thornton Civic Center, Brittany Hill or near the water towers at 112th Ave and I-25.  Some higher locations along Colorado Blvd north of 136th Ave might be good places as well.

The December 10th eclipse will begin around 5:46am MST as the first part of Earth’s shadow encroaches on the moon.  Totality will be achieved at 7:06am MST.

For watchers along the Colorado Front Range, the low moon with the Rocky Mountains to the west will render some extraordinary images.  There is however a catch.

The tall mountains on our western horizon are going to limit the time we are able to see the moon and the eclipse.  In the Denver area, we won’t actually be able to see the total eclipse as the moon will have disappeared behind the mountains by then.

It is estimated metro area residents will be able to watch the show until about 6:50am at which point the moon will be below the horizon.  Clear skies are in the forecast so clouds should not be a concern.

NASA says that astronomers and psychologists don’t know why the human brain sees the moon as larger when it is low on the horizon.  “In fact, a low Moon is no wider than any other Moon (cameras prove it) but the human brain insists otherwise. To observers in the western USA, therefore, the eclipse will appear super-sized,” NASA said.

The celestial show should be worth getting out of bed a bit early to see, even if residents of Colorado won’t get to see the entire show.

Atmospheric scientist Richard Keen of the University of Colorado told NASA, “I expect this eclipse to be bright orange, or even copper-colored, with a possible hint of turquoise at the edge.”

Keen explains that the Earth’s stratosphere is currently relatively free of volcanic dust and other particulates.  This should allow for a very bright event.

Tomorrow’s eclipse will be the last total lunar eclipse until April 14, 2014. A second will occur that year on October 8th.  In 2015 there will also be two; one on April 4th and another on September 27th.

If you get any pictures of the eclipse, be sure to head over to our Facebook page and share them or email them to us at info@thorntonweather.com and we will post them.

December 4 to December 10 – This Week in Denver Weather History

December 4 to December 10 - This Week in Denver Weather History
December 4 to December 10 - This Week in Denver Weather History

As we have seen in recent days, Old Man Winter oftentimes makes his appearance in earnest during the month of Denver. Looking back at this week in Denver weather history we can see that is not at all unusual.

From the National Weather Service:

1-5

In 1913…the 1st marked the start of the heaviest 5-day total snowfall in the city’s history. During this period snowfall totaled 45.7 inches. Starting on the 1st…snow fell intermittently for 3 days and accumulated a little over 8 inches. On the 4th and 5th…an additional 37.4 inches of snow fell. At Georgetown in the foothills west of Denver even more snow fell…86 inches over the 5 days with the most…63 inches…on the 4th. In Colorado…snowfall was heavy along the eastern slopes of the mountains from the Palmer Divide north. High winds during the storm caused heavy drifting…which blocked all transportation. Snow cover of an inch or more from the storm persisted for 60 consecutive days from the 1st through January 29…1914. Additional snowfall in December and January prolonged the number of days. This is the third longest period of snow cover on record in the city.

2-4

In 1909…post-frontal snowfall totaled 6.1 inches in downtown Denver. Most of the snow…5.9 inches…fell between 6:00 pm on the 2nd and 6:00 pm on the 3rd. North winds were sustained to 18 mph on both the 2nd and 3rd.

2-17

In 1939…more than 2 weeks of unseasonably warm weather made the month the 3rd warmest on record. Seven daily temperature records were set…including the all time record high temperature for the month of 79 degrees on the 5th. Daytime highs were balmy with 14 days in the 60’s and 70’s. Low temperatures dipped to freezing or below on only 5 days. The period was dry with only a trace of snow on the 12th.

3-4

In 1968…strong Chinook winds in Boulder gusting to 52 mph downtown caused 7 thousand dollars in damage. Flying debris damaged cars…houses…and other property in Boulder. West winds gusted to 49 mph late on the 3rd and to 45 mph on the 4th at Stapleton International Airport where the temperature climbed to a high of 60 degrees on the 4th.

In 1970…strong winds whistled through Boulder. Sustained winds of 40 mph with gusts to 70 mph were recorded at the National Bureau of Standards in Boulder. Wind gusts to 50 mph occurred in downtown Denver. No damage was reported. On the 3rd…northwest winds gusted to 40 mph at Stapleton International Airport where the Chinook winds warmed the temperature to a high of 66 degrees on the 4th.

In 1999…heavy snow fell over the foothills and metro Denver. The heaviest snowfall occurred in the foothills south of I-70 and near the Palmer Divide. Snowfall totals included: 25 inches near Tiny Town; 18 inches at Conifer; 15 inches near Evergreen; 14 inches at Chief Hosa…8 miles west of Castle Rock…and near Blackhawk; 12 inches at Pine Junction and 8 miles south of Sedalia; 11 inches atop Floyd Hill and in Roxborough; and 10 inches at Castle Rock. Around metro Denver…snowfall totals included: 10 inches at Highlands Ranch…9 inches at Parker…and 8 inches in Aurora and Wheat Ridge. Elsewhere around the metro area…snowfall generally ranged from 3 to 5 inches. Only 3.2 inches of snow fell at the site of the former Stapleton International Airport. North winds gusted to 32 mph at Denver International Airport on the 3rd.

In 2007…high winds developed in and near the Front Range foothills. Peak wind reports included: 88 mph atop Niwot Ridge; 87 mph atop mines peak; 80 mph…3 miles southeast of Jamestown; 78 mph at Longmont; 74 mph at Table Mesa. A few power outages occurred in Longmont as broken branches downed power lines. Northwest winds gusted to 38 mph at Denver International Airport on the 4th.

Continue reading December 4 to December 10 – This Week in Denver Weather History

Second snowstorm in three days hits Thornton, third round on the way

A view of the Flatirons near Boulder on December 3, 2011 following the second snowstorm in three days. (National Weather Service)
A view of the Flatirons near Boulder on December 3, 2011 following the second snowstorm in three days. (National Weather Service)

The meteorological winter starts on December 1 and Old Man Winter is making sure we know he is around.  Two snowstorms have hit Thornton in a three day span and more snow is on the way.

On Thursday the first storm brought 5.1 inches to Thornton.  Denver officially recorded 5.7 inches at Denver International Airport (DIA).

Shortly before midnight last night, the snow began falling again and continued through noon.  Here in Thornton we recorded 4.9 inches with the latest system.

  • Remember, when the snow starts flying, stay up to date with ThorntonWeather.com: ‘Like’ us on Facebook, follow us on Twitter and add us to your Google+ circles

It is interesting to note that this brings our seasonal snowfall total to 24.5 inches.  For comparison, we recorded a dismal 21.2 inches during all of the last season!  In an average season, December received 61.7 inches.

Yet another storm system is on its way and is expected to arrive tomorrow evening.  Right now it isn’t look near as impressive as the last two but Thornton may see another inch or two out of it.

Over the longer term, colder than normal temperatures are expected to last through this week.  The first half should be dry but Thursday night into Friday we may see snow again.  Long range models looking even further ahead predict colder than normal temperatures to last through the first half of the month.

Below is time lapse video from our webcams capturing last night’s storm.  Each take 14 hours and compress them into 30 seconds.

November 2011 Thornton weather recap: A cold and snowy start ends warm and dry

When the month of November 2011 began we seemed to be headed toward a very wintry month.  Despite that cold start however, the weather soon turned much more moderate.

The first three days of the month yielded 4.5 inches of snow as officially measured at Denver International Airport.  That total however was far less than what was seen in the rest of the metro area.  For comparison, here in Thornton we recorded 7.9 inches.

Over those same three days the month saw a chilly average temperature of 27.8 degrees which was  16.5 degrees below normal.  The low pressure trough and cold front that generated the cold and snow however would soon be gone and nothing but a memory.

From November 4th through the end of the month the weather turned mild and dry.  No measurable precipitation was recorded for the balance and by the end of the month the average temperature had climbed to above normal.

The month ended with an average temperature of 39.5 degrees which was 1.2 degrees above normal.  Thornton was a touch cooler with an average of 38.8 degrees.

Highs ranged from 69 degrees on the 24th to a low of 10 degrees on the 2nd and the 3rd at DIA.  Here in Thornton we were milder with a high of 72.0 degrees and a low of 14.1 degrees.

The early month snowstorms yielded 0.47 inches of precipitation at the airport versus the November average of 0.61 inches.  The 4.5 inches of snowfall was well below the normal of 8.7 inches for November.

Click here to view the Thornton climatological summary for November 2011.  Below is the official Denver summary from the National Weather Service.

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
645 AM MST THU DEC 1 2011

................................... 

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2011... 

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2011

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................ 
TEMPERATURE (F)
RECORD
 HIGH              80   11/08/2006
 LOW              -18   11/29/1877
HIGHEST            69   11/24        80     -11       77  11/06
LOWEST             10   11/02       -18      28        4  11/25
                        11/03
AVG. MAXIMUM     54.1              52.1     2.0     52.6
AVG. MINIMUM     24.8              24.5     0.3     24.0
MEAN             39.5              38.3     1.2     38.3
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX = .01         2               4.7    -2.7        5
DAYS >= .10         2               1.6     0.4        2
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.47   11/01 TO 11/02           11/16 TO 11/16
                                                          11/08 TO 11/09
                                                          11/09 TO 11/09
 STORM TOTAL       MM                                 MM
 (MM/DD(HH))            MM                    11/16(00) TO 11/16(00)
                                                 11/09(00) TO 11/09(00)9
                                                 11/09(00) TO 11/09(00)9

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   MM
TOTALS            4.5                MM

DEGREE_DAYS
HEATING TOTAL     757               801     -44      793
 SINCE 7/1       1252              1377    -125     1128
COOLING TOTAL       0                 0       0        0
 SINCE 1/1        964               769     195      870

FREEZE DATES
RECORD
 EARLIEST     09/08/1962
 LATEST       06/08/2007
EARLIEST                        10/07
LATEST                          05/05
.......................................................... 

WIND (MPH)
AVERAGE WIND SPEED              9.9
RESULTANT WIND SPEED/DIRECTION   3/229
HIGHEST WIND SPEED/DIRECTION    43/260    DATE  11/12
HIGHEST GUST SPEED/DIRECTION    52/260    DATE  11/12

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            7
NUMBER OF DAYS PC             23
NUMBER OF DAYS CLOUDY          0

AVERAGE RH (PERCENT)     45

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                3     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                2     SNOW                       2
LIGHT SNOW                2     SLEET                      0
FOG                       3     FOG W/VIS

Thornton snowstorm and news updates

Old Man Winter is staged to arrive in Colorado in a big way.  With snow and arctic cold set to arrive, the next 48 hours are going to be interesting and in fact, the cold looks to last through the weekend.

For all the latest with the storm, be sure to check our Winter Weather Briefing page.

We will be providing updates as needed on our Google+ and Facebook pages as well.  We realize however that many folks don’t belong to those social networks.  You can follow along instead using the embedded Facebook ticker below if that is the case.

  • Remember, when the snow starts flying, stay up to date with ThorntonWeather.com: ‘Like’ us on Facebook, follow us on Twitter and add us to your Google+ circles

November 27 to December 3 – This Week in Denver Weather History

November 27 to December 3 - This Week in Denver Weather History
November 27 to December 3 - This Week in Denver Weather History

Cold, snow and wind are the dominant conditions we see in our look back at this week in Denver weather history. All three are common this time of year and extremes with those conditions seem to be unusually common as well.

Among the highlights are numerous high wind events that not only caused damage but also injury to unprepared residents. Significant snowfall also appears many times including a storm in 1983 that shut down the city for the Thanksgiving weekend and left snow on the ground for 63 days.

From the National Weather Service:

25-27

In 1978…heavy snowfall of 6.0 inches was measured at Stapleton International Airport where north winds gusted to 20 mph. Most of the snow…4.8 inches…fell on the 25th. The greatest amount of snow measured on the ground was 5 inches due to settling and melting.

25-28

In 1952…the average coldest 4-day period in November in the previous 81 years of record occurred. Maximum temperatures of 19…15…21…and 25 degrees were recorded. Minimum temperatures were below zero each day with readings of 7 below…6 below…5 below…and 6 below.

25-29

In 1985…dense fog with visibilities as low as 1/8 mile occurred on five consecutive days at Stapleton International Airport. The fog was at times accompanied by light snow… Light freezing drizzle…or ice crystals. Fog occurred all day on both the 26th and 29th.

26-27

In 1876…heavy snowfall totaled 9.0 inches over the city from 5:00 pm on the 26th through 5:00 p.m. on the 27th. Precipitation was 0.30 inch on the 25th and 0.60 inch on the 27th.

In 1919…an incursion of cold arctic air produced snowfall of 4.6 inches over downtown Denver. Temperatures dipped to 5 degrees below zero on the evening of the 26th and recovered to a high of only 1 degree below zero on the 27th…the all-time record low maximum for the month of November and the record for the date. Northwest winds were sustained to 25 mph with gusts to 26 mph on the 26th.

In 1923…snowfall of 2.0 inches was the only snow of the month. North winds were sustained to 22 mph on the 26th.

In 1972…heavy snowfall totaled 7.5 inches at Stapleton International Airport where north winds gusted to only 18 mph on the 27th.

In 1983…a Thanksgiving blizzard dumped 21.5 inches of snowfall in 37 hours with a maximum of 18 inches on the ground at Stapleton International Airport. The storm produced howling winds…which paralyzed Thanksgiving weekend transportation across all of eastern Colorado. On the 27th…Stapleton International Airport closed… Opening 24 hours later. Interstate highways were closed in all directions…but west…from Denver. At Stapleton International Airport…north winds gusted to 36 mph on the 26th and to 29 mph on the 27th. However…most wind speeds across metro Denver were 15 to 30 mph. Temperatures hovered in the teens and lower 20’s. Many stores and businesses closed. Several high school football games were postponed. Across metro Denver…snow depth varied from 15 inches in Commerce City to 28 inches near Chatfield Reservoir. Snow removal in Denver was estimated at 1.5 million dollars. Following the storm… An inch or more of snow remained on the ground for 63 consecutive days through January 27…1984. This is the longest period of continuous snow cover ever recorded in Denver.

In 1990…an early winter storm deposited 2 to 8 inches of wet snow across metro Denver. Snowfall totaled 3.4 inches at Stapleton International Airport where northeast winds gusted to 30 mph on the 26th.

In 1993…strong winds swept off the foothills across metro Denver. Sustained winds of 30 to 50 mph were common across the area. Wind gusts to 67 mph were recorded atop Squaw Mountain near Idaho Springs. West winds gusted to 36 mph at Stapleton International Airport on the 26th. The strong winds produced some blowing snow…reducing the visibility to less than one mile at times.

In 1995…snowfall totaled 3.7 inches at the former Stapleton International Airport site. The foothills west of Denver received 4 to 7 inches of snow. North-northeast winds gusted to 34 mph at Denver International Airport on the 26th.

Continue reading November 27 to December 3 – This Week in Denver Weather History

Image of the Day: Earth’s atmosphere and moon

NASA’s Earth Observatory releases some of the most stunning views of the planet taken by satellites and astronauts.  It’s ‘Image of the Day’ today is a stunning one showing the Earth’s atmosphere with a crescent moon hovering above.

Taken by astronauts aboard the International Space Station (ISS) on July 31, 2011, the image clearly shows the layers of our life giving atmosphere.  The moon appears extraordinarily close thanks to the camera’s perspective.

Astronauts aboard the International Space Station captured this stunning image of the atmosphere and the moon. (NASA)
Astronauts aboard the International Space Station captured this stunning image of the atmosphere and the moon. (NASA)

From NASA:

The limb of the Earth is a work of awesome beauty and a gift to science. When observed from space, the palette of gaseous layers of atmosphere reminds us of the fragility and tenuousness of the cocoon that shelters life from cold, harsh space. That same view also allows scientists to detect the gases and particles that make up our the different layers of our atmosphere. Astronauts aboard the International Space Station captured a bit of both in this digital photograph from July 31, 2011. They threw in the Moon as an extra gift.

Closest to Earth’s surface, the orange-red glow reveals Earth’s troposphere—the lowest, densest layer of the atmosphere, and the one we live within. A brown transitional layer is the upper edge of the troposphere, known as the tropopause. A milky white and gray layer sits above that, likely a slice of the stratosphere with perhaps some noctilucent clouds thrown in. The upper reaches of the atmosphere—the mesosphere, thermosphere, and exosphere—fade from shades of blue to the blackness of space.

The different colors occur because the dominant gases and particles in each layer act like prisms filtering out certain colors of light. Instruments carried on satellites and on craft such as the space shuttle have allowed scientists to decipher characteristics of the ozone layer and the climate-altering effects of aerosols.

A thin crescent of the Moon is illuminated by the Sun below the horizon of the Earth. Though the Moon is more than 384,400 kilometers (238,855 miles) away, the perspective from the camera makes it appear to be a part of our atmosphere.

Astronaut photograph ISS028-E-020072 was acquired on July 31, 2011, with a Nikon D3S digital camera using a 400 mm lens, and is provided by the ISS Crew Earth Observations experiment and Image Science & Analysis Laboratory, Johnson Space Center. The image was taken by the Expedition 28 crew. The image has been cropped and enhanced to improve contrast. Lens artifacts have been removed. The International Space Station Program supports the laboratory as part of the ISS National Lab to help astronauts take pictures of Earth that will be of the greatest value to scientists and the public, and to make those images freely available on the Internet. Additional images taken by astronauts and cosmonauts can be viewed at the NASA/JSC Gateway to Astronaut Photography of Earth. Caption by Mike Carlowicz.

A look ahead at Thornton’s December weather

Thornton's December Weather Preview
December ranks as Denver's coldest and third snowiest month.

As with any month in the Denver area, December can bring a variety of conditions. Certainly we have seen bitter cold and heavy snow but in other years dry and mild conditions prevailed.

Based on the updated 1981 to 2010 averages from the National Weather Service, the month is actually our coldest of the year. It also is our third snowiest behind March and November.

Winter weather is typically what we think of when we think about December and it is indeed prone to winter extremes.

In fact, our coldest month in Denver history was in December 1983.  In terms of snow, our snowiest month ever occurred in December 1913.  More recently the Christmas Eve Blizzard of 1982 and the storms on December 2006 invoke snow-filled memories.

You can read much more about our historical December weather as well as get a preview of what we can expect in 2012 here in our complete story.

Remember, when the snow starts flying, stay up to date with ThorntonWeather.com: ‘Like’ us on Facebook, follow us on Twitter and add us to your Google+ circles

Need a gift for a weather enthusiast on your list? Check out Weather Geek Stuff

Weather Geek Stuff is a great place to shop for gifts for weather enthusiasts, weather geeks and weather lovers.

It takes a different kind of a person to actually get excited about blizzards, tornadoes, hurricanes and the other types of extreme weather that Mother Nature throws at us.  These people are often called weather enthusiasts or weather geeks and if you have someone like this on your holiday shopping list, we have just the store for you.

Weather Geek Stuff is an online store that provides a host of clothing items and novelties just for weather buffs.  From the store’s custom ‘Weather Geek’ and ‘Weather Diva’ logoed merchandise to items imprinted with amusing weather warnings signs as well as Skywarn storm spotter logos, there is something there sure to please any weather lover.

Weather Geek Stuff’s merchandise was shown on the Weather Channel as a recommended gift so you know the quality is good.  Stu Ostro, Weather Channel’s Senior Director of Weather Communications even sports a ‘Weather Geek’ t-shirt on his Facebook page!

Kids and dogs aren’t left out of the weather fun either.  There is a wide variety of clothing items sized just right for the little ones from babies to bigger kids.  Canine companions as well can get shirts and bowls emblazoned with a weather-related logo.

The selection goes far beyond clothing too.  Water bottles, clocks, mugs, bags and other novelties are part of the store’s offerings.  For the tech types, cases for iPhones and iPads are available.

Be sure to head over to WeatherGeekStuff.com and get that holiday gift today for your favorite weather geek. 

Support ThorntonWeather .com

Weather Geek Stuff is owned and operated by the same folks that run ThorntonWeather.com.  We provide ThorntonWeather.com as a no-cost service to the community and use the minimal amount of money made from Weather Geek Stuff to support the costs of running this website and the associated equipment.  So remember, if you have a weather buff on your shopping list, by buying from Weather Geek Stuff you are supporting ThorntonWeather.com!

November 20 to November 26 – This Week in Denver Weather History

November 20 to November 26 - This Week in Denver Weather History
November 20 to November 26 - This Week in Denver Weather History

With the Thanksgiving holiday approaching, travelers cast a wary eye on Denver’s weather and in our look back at this week in Denver weather history we see they have had cause for concern in the past. Snowstorms and wind have caused their share of problems. Also notable, it was 140 years ago that Denver’s first official weather observation occurred.

  • Stay up to date with Thornton’s weather: ‘Like’ us on Facebook, follow us on Twitter and add us to your Google+ circles

From the National Weather Service:

18-20

In 1930…a major storm dumped a total of 13.6 inches of snowfall over downtown Denver. Most of the snow…9.4 inches…fell on the 19th when north winds were sustained to 23 mph. This was the only measurable snow of the month. Temperatures hovered in the 20’s and lower 30’s.

In 1956…an intense winter storm dumped 12.8 inches of snowfall on metro Denver. Strong north-northeast winds gusting to 33 mph at Stapleton Airport frequently reduced the visibility to 1/2 mile in snow and blowing snow on the 19th. Most of the snowfall…10.7 inches…occurred on the 19th.

19-21

In 1979…a heavy snowstorm buried most of Colorado under at least a foot of snow. Snowfall at Stapleton International Airport totaled 17.7 inches…the greatest snow depth since 1946. Winds to 60 mph produced 5-foot drifts paralyzing the city as temperatures hovered in the 20’s. While small airports closed…Stapleton remained open…but with long delays that snarled thanksgiving holiday traffic. Schools and businesses closed and postal deliveries were delayed. Almost all major highways leading out of Denver were closed to traffic for periods of time on the 20th and 21st. Most of the snow…13.5 inches…fell on the 20th. At Stapleton International Airport…north winds gusted to 35 mph on the 20th and to 38 mph on the 21st.

20

In 1871…the first official weather observation in Denver… Was taken by Henry Fenton…observer sergeant of the united states army signal service at 5:43 am. The office was located on the 2nd floor of a building at the corner of Larimer and g streets…now 16th street. The daily weather journal hand written entry for the day follows: “Snow fell heavily during past night. At 5:43 am it was snowing light and continued until 8 am. Wind during snow storm gentle and a little west of south…and continued there during the remainder of the day. Sky clear after 8 am. Very cold weather prevailed all day and night. Thermometer at 9:43 pm 14 degrees. Rain gauge and self-registering thermometer not in position owing to severe storm last week. Barometer falling during the morning and rising rapidly at night.”

In 1894…northwest Chinook winds sustained to 40 mph with gusts to 45 mph warmed the temperature to a high of 58 degrees in the city.

In 1909…steady and very strong winds in Boulder caused 3 thousand dollars in damage.

In 1915…post-frontal northeast winds sustained to 40 mph with gusts as high as 42 mph produced only a trace of snow. It was windy most of the day.

In 1923…west winds were sustained to 42 mph with gusts to 44 mph before daybreak. The strong winds persisted in the city for only about 3 hours.

In 1993…a wind gust to 72 mph was recorded at Table Mesa in southwest Boulder.

In 1994…winds gusted to 77 mph atop Squaw Mountain west of Denver. West winds gusted to 40 mph at Stapleton International Airport.

20-21

In 1898…snowfall totaled 4.0 inches in downtown Denver. Northeast winds were sustained to 48 mph with gusts as high as 60 mph behind an apparent cold front on the 20th… When temperatures plunged from a high of 66 degrees to a low of 9 degrees. On the 21st the high was only 24 degrees and the low was 2 degrees.

In 1970…a wind gust to 94 mph was recorded at gold hill in the foothills west of Boulder. Strong winds also swept across metro Denver. Wind gusts reached 59 mph in downtown Boulder…while at Stapleton International Airport west- northwest winds gusted to 43 mph on the 21st. Damage was minor.

In 1992…a large Canadian air mass moved into the state at the same time an upper level storm system approached from the west. The combination of cold air at the surface and very moist air aloft produced heavy snow across the entire state. Snowfall totaled 6.3 inches at Stapleton International Airport…where north winds gusted to 23 mph on the 20th. Snow was heavier in the foothills…with 14 inches at Wondervu…13 inches at Aspen Springs…Conifer… Boulder…and Gross Reservoir…8 inches at Rollinsville… And 10 inches at Golden Gate Canyon and Morrison.

In 2007…a storm system brought moderate to heavy snowfall to portions of the urban corridor. Storm totals included: 7 inches…3 miles south-southeast of Fort Collins…with 6 inches in Boulder and at Horsetooth Inlet Bay. Elsewhere… Storm totals ranged from 2 to 5 inches. Snowfall totaled 2.0 inches at the site of the former Stapleton International Airport.

Continue reading November 20 to November 26 – This Week in Denver Weather History