Category Archives: Thornton Weather

Thornton’s February weather preview: Milder temps, dry conditions typical during month

Denver Climatological Preview - February 2013As we wrap up a January that was pretty much average in terms of temperature and precipitation, we look to February with hope for relief from the dry conditions we have seen thus far this winter.  Unfortunately historically February is a relatively dry month but we do start working off winter as temperatures climb.

To date Denver’s seasonal snowfall is 10.8 inches below average and Thornton is even further behind.  February though is only the Mile High City’s sixth snowiest month so while we can receive big storms in February, we can’t count on making up much ground.

For those looking forward to milder weather, average temperatures do increase during the month as a sign that winter is fading and spring is approaching.

For the complete February preview including a look at historical averages and extremes as well as a look at what long range forecasts are predicting, click here. 

Californians struggle with “bitter cold” temperatures

While northeastern Colorado deals with unusually cold temperatures stubbornly dropping below freezing and even 0°, California has been seeing their own spell of “bitter cold” weather.  Of course their definition of “cold” and ours are quite different as highlighted in a clip from Jimmy Kimmel Live.

Somehow we here at ThorntonWeather.com aren’t feeling too much sympathy for those in the Golden State.  😉

Bald eagles come to roost in Thornton

This bald eagle was spotted Saturday along the South Platte River Greenway Trail near the Spratt Platte Lakes.  See more images in the slideshow below. (ThorntonWeather.com)
This bald eagle was spotted Saturday along the South Platte River Greenway Trail near the Spratt Platte Lakes. See more images in the slideshow below. (ThorntonWeather.com)

One of the great joys of winter in Colorado is an increase in appearances of bald eagles.  The national bird of the United States is majestic to see and here in Thornton the birds routinely roost during the cold months.

Bald eagles can be found virtually anywhere in the United States and while Benjamin Franklin would have preferred the turkey, eagles won the right to become one of our nation’s most important symbols.

Here in Colorado there are some year-round nesting pairs, most notably for those in the north Denver metro area are some at Barr Lake.  More common are eagles that come to Colorado seasonally and then return north when we start to warm up in the spring.

In recent years we have admired a number of these great birds on the South Platte River Greenway Trail between Colorado Blvd and McKay Road.

This year as many as four have been spotted in the area.  While they don’t appear to have nested in the area, they do roost daily along the river.

Yesterday we went for a bike ride and were able to spot one of the eagles as well as a hawk, ducks and the ever-present geese.  The slideshow below shows you some of the images we captured.

ThorntonWeather.com experiences record-setting year in 2012

ThorntonWeather.com's 2012 website statistics.  Traffic to our site grew by more than 20% as we served up over 2,000,000 pages.
ThorntonWeather.com's 2012 website statistics. Traffic to our site grew by more than 20% as we served up over 2,000,000 pages.

We knew people across northern Colorado loved us but now we know just how much!  ThorntonWeather.com experienced record-setting traffic in 2012 with over 2 million pages served.

As arguably the most popular, independent weather source in the Denver area, ThorntonWeather.com has seen tremendous growth since it was first started in October 2006.  Back then the site looked much different and didn’t have near as much information as it does now.

Since our founding we have strived to provide the most accurate, timely weather information for Thornton and its surrounding communities.  ThorntonWeather.com has become the go to source for residents and even local governments and organizations.

The sheer breadth of information on our website surpasses any local broadcast or print media outlet – period.  And while we may not be as flashy as some of the bigger sites on the Internet, we will put up the quality of our weather and climate information against any of them.

In 2012 we didn’t stand still adding more than a dozen new pages and many more features and enhancements.  We continue to field emails with weather related questions continually and pride ourselves on personal replies to each and every one of them.

You, our visitors and our neighbors, paid us back with a banner year.  Nearly one quarter of a million unique visitors came to our site as we served up over 2 million individual pages.  This was about a 20 percent increase over 2011.

What’s ahead for 2013?  You can be certain we won’t be standing still.

We continue to raise funds for high-definition webcams to help give you a better look at what is going on outside.  Remember, we make no money off of ThorntonWeather.com as it is simply run by a resident that is passionate about the weather.  Any help you can provide is greatly appreciated.  Click here to learn more about how to help.

Additionally, while we are in the depths of winter right now, severe weather season will be here before you know it and we have a number of enhancements in mind to help you monitor the changing conditions and keep you and your family safe.

We truly are humbled and appreciate that so many of you have make ThorntonWeather.com your source for weather.  Thank you very much and we wish each of you a very prosperous and happy new year!

For all the latest with Thornton’s weather, be sure to ‘like’ us on Facebook, follow us on Twitter and add us to your Google+ circles.

Thornton’s January weather preview: Typically a cold, but not snowy month

Denver's January weather and climatology preview for 2013.As we begin the new year the winter chill begins to set in.  While January can see its share of extremes, the month historically sees stable temperatures and is usually relatively dry.

January ranks as the second coldest month in Denver next to December with average temperatures remaining virtually the same from the start to the end of the month.  In terms of snowfall, the month only ranks as the fourth snowiest and it is not uncommon for it to be quite dry.

What does January 2013 hold for us?  Indications are that we may very well continue the recent pattern of below normal temperatures and relatively dry conditions.

For the complete January preview including a look at historical averages and extremes, click here. 

2012 Thornton weather recap: Warm and dry conditions dominated

Thornton, Colorado 2012 weather recapAs the sun sets on 2012 and the new year dawns, we look back on the past 12 months and can see it for what it was: unusually dry and warm.  While we were spared monster blizzards or much severe weather, there were still noteworthy weather events.

In terms of temperatures, Denver recorded an overall average of 53.8 degrees as recorded at Denver International Airport.  This was 3.4 degrees above average and put 2012 in the history books as the third warmest year in Denver history.  Here in Thornton we were, as usual, a bit cooler with an annual average temperature of 52.9 degrees.

The National Weather Service reported 73 days with temperatures at or above 90 degrees which far exceeds the average of 40 such days we normally see annually.  Here in Thornton we too saw more than average with 62 days of 90 degree or hotter temperatures.

The late spring and early summer proved to be record setting in terms of heat.  The month of June set a record high temperature average and July was the hottest month in Denver history.  Two days, June 25th and 26th broke daily high temperature records and tied Denver’s all-time high temperature of 105 degrees.

On the opposite end of the thermometer, Denver officially recorded 132 days with temperatures at or below freezing.  Here in Thornton we recorded two more with 134 days.  On average the Mile High City records 157 days of freezing temperatures.

While the year was unusually warm, it was also extraordinarily dry.  A mere 10.11 inches of precipitation was recorded in Denver’s rain bucket at DIA, 4.19 inches below normal.  Here in Thornton we were even drier as we recorded 9.61 inches of precipitation in 2012.  While extremely dry, neither measurement was low enough to make the list of top 15 driest years.

Total snowfall for the calendar year ended up at 38.5 inches at DIA and 35.1 inches in Thornton. Both locations fell well short of the Denver annual average snowfall of 53.5 inches.  Denver’s snowfall was enough to keep it off the list of top 15 least snowiest years.  However Thornton’s measurement would have made it the 13th least snowiest on Denver’s list.

Snowfall started out reasonably strong thanks to a healthy snowfall total in February.  However while March is on average our snowiest month, that did not hold true in 2012.  A mere 0.03 inch of precipitation was recorded setting the stage for the balance of a dry year.

Combined, June, July and August recorded only 1.81 inches of precipitation at DIA.  This was an astonishing 4.02 inches below average for that period.  Thornton fared only slightly better over the period with 2.34 inches.

While September brought above normal precipitation, the final three months of 2012 returned us to drier than normal conditions.

Extreme weather events were not particularly common in 2012.  There was a distinct lack of heavy snow events and even spring’s severe weather season was relatively tame.

However, the hot summer temperatures and tinder dry conditions did lead to a deadly and destructive wildfire season.

The High Park Fire in June quickly became the second largest wildfire in Colorado history.  That blaze was soon followed by the Waldo Canyon Fire west of Colorado Springs which went into the history books as the most destructive blaze in state history.

Click here for Thornton’s 2012 Climate Summary Report

Thornton, Colorado 2012 Temperature Summary (ThorntonWeather.com)
Thornton, Colorado 2012 Temperature Summary (ThorntonWeather.com)
Thornton, Colorado 2012 Precipitation Summary (ThorntonWeather.com)
Thornton, Colorado 2012 Precipitation Summary (ThorntonWeather.com)
Denver, Colorado 2012 Temperature and Precipitation Summary (National Weather Service)
Denver, Colorado 2012 Temperature and Precipitation Summary (National Weather Service)

From the National Weather Service:

CLIMATE REPORT
NATIONAL WEATHER SERVICE BOULDER, CO
130 AM MST TUE JAN 1 2013

...THE DENVER CO CLIMATE SUMMARY FOR THE YEAR OF 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2012

WEATHER         OBSERVED          NORMAL  DEPART  LAST YEAR`S
                 VALUE   DATE(S)  VALUE   FROM    VALUE  DATE(S)
                                          NORMAL
................................................................ 
TEMPERATURE (F)
RECORD
 HIGH             105   06/26/2012
                        06/25/2012
                        07/20/2005
 LOW              -29   01/09/1875
HIGHEST           105R  06/26        64      41       99  08/25
                        06/25                             07/31
                                                          07/04
LOWEST             -6   01/11        36     -42      -17  02/02
AVG. MAXIMUM     68.4              64.7     3.7     64.8
AVG. MINIMUM     39.3              36.3     3.0     36.4
MEAN             53.9              50.5     3.4     50.6
DAYS MAX >= 90     73              39.6    33.4       50
DAYS MAX <= 32     19              20.0    -1.0       23
DAYS MIN <= 32    132             156.9   -24.9      158
DAYS MIN <= 0       4               5.8    -1.8       12

PRECIPITATION (INCHES)
RECORD
 MAXIMUM        23.31   1196
 MINIMUM         7.29   2008
TOTALS          10.11             14.30   -4.19    17.31
DAILY AVG.       0.03              0.04   -0.01     0.05
DAYS >= .01        52              79.7   -27.7       80
DAYS >= .10        23              34.9   -11.9       37
DAYS >= .50         9               7.6     1.4       10
DAYS >= 1.00        1               2.3    -1.3        6
GREATEST
 24 HR. TOTAL    1.63   MM                       05/11 TO 05/12
                                                          10/26 TO 10/26
                                                          10/26 TO 10/26
 STORM TOTAL       MM                               2.52
 (MM/DD(HH))            MM                    05/12(00) TO 05/12(00)
                                                 10/26(00) TO 10/26(00)6
                                                 10/26(00) TO 10/26(00)6

SNOWFALL (INCHES)
RECORDS
 TOTAL             MM   5
 24 HR TOTAL       MM
 SNOW DEPTH        MM   MM
TOTALS           38.5              53.8   -15.3     46.8
 LIQUID EQUIV    3.85              5.40   -1.55     4.68
SINCE 7/1        12.4              22.5   -10.1     29.5
 LIQUID 7/1      1.24              2.20   -0.96     2.95
SNOWDEPTH AVG.      0                MM      MM        0
DAYS >= TRACE      36              33.3     2.7       41
DAYS >= 1.0        13              16.3    -3.3       16
GREATEST
 SNOW DEPTH        11   02/04                          7  01/10
                                                          01/11
 24 HR TOTAL     12.5   MM                       10/26 TO 10/26
                                                          10/26 TO 10/26
                                                          10/26 TO 10/26
 STORM TOTAL       MM                                8.5
 (MM/DD(HH))            MM                    10/26(00) TO 10/26(00)
                                                 10/26(00) TO 10/26(00)6
                                                 10/26(00) TO 10/26(00)6

DEGREE_DAYS
HEATING TOTAL    5198              6059    -861     6069
 SINCE 7/1         MM              2468      MM       MM
COOLING TOTAL    1236                 0    1236      964
 SINCE 1/1       1236               769     467      964

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

WIND (MPH)
AVERAGE WIND SPEED              10.3
RESULTANT WIND SPEED/DIRECTION   3/205
HIGHEST WIND SPEED/DIRECTION    52/240    DATE  06/02
HIGHEST GUST SPEED/DIRECTION    67/250    DATE  06/02

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR           86
NUMBER OF DAYS PC            235
NUMBER OF DAYS CLOUDY         45

AVERAGE RH (PERCENT)     44

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                4     RAIN                      12
LIGHT RAIN               45     FREEZING RAIN              0
LT FREEZING RAIN          1     HAIL                       3
HEAVY SNOW                4     SNOW                      15
LIGHT SNOW               37     SLEET                      0
FOG                      73     FOG W/VIS <= 1/4 MILE     21
HAZE                     51

-  INDICATES NEGATIVE NUMBERS.
R  INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T  INDICATES TRACE AMOUNT.

Santa begins his annual journey, track him on ThorntonWeather.com

ThorntonWeather.com and NORAD offer the Santa TrackerSanta Claus begins his whirlwind trip around the globe tonight to deliver toys to all the good little boys and girls! For more than 50 years the North American Aerospace Defense Command (NORAD) has tracked Kris Kringle on Christmas Eve and helped to ensure he completes his journey safely.

ThorntonWeather.com is pleased to be able to provide live Santa tracking from NORAD right here on our site!

Click here to check it out and be sure to come back often to see where Kris Kringle is at!

Here’s the first video released today of Santa’s departure from the North Pole:

NASA satellite imagery captures Colorado’s pre-Christmas snow

The wintry weather that moved through Colorado over the past 48 hours provided some relief to the drought-stricken state.  NASA satellites captured the snowy landscape of the Centennial State as the storm moved off toward the Midwest.

The system covered much of the higher elevations of the Rocky Mountain region in snowfall.  For Colorado this brought snow to the high country much to the delight of ski resorts and skiers.

In Denver the storm brought very cold temperatures but not as much snow as was hoped.  Officially the Mile High City recorded 1.7 inches bringing the seasonal total to 9.8 inches, well below normal.

The image from NASA’s Aqua satellite was taken on Wednesday, December 19 as the storm began to move out onto the plains.  The snow covered mountains west of Denver are clearly seen while cloud covers the lower elevations.

Satellite imagery shows the pre-Christmas snowstorm that blanketed Colorado. Click the image for a larger view.  (NASA)
Satellite imagery shows the pre-Christmas snowstorm that blanketed Colorado. Click the image for a larger view. (NASA)

Thornton’s December preview: Hoping for snow

Thus far the snow season has been far less than kind to Colorado.  Snow totals are running well below normal from the plains to the Rockies.

December may bring some hope as the month is our third snowiest. The month brings with it the official start to winter and the month usually brings with it our first real taste of Arctic temperatures.

Precipitation can be hit or miss with monster snowstorms possible but we have also seen starkly dry years.

Current long range forecasts indicate we may very well see continued dry and warm weather.

Get all the details on Thornton’s December weather including a look back at historical events and a look at the long range forecast in our December weather preview here.

November 2012 Thornton weather recap: Warmer, drier than normal

Thornton's November 2012 weather recapThe two key weather related words to describe the Denver area’s November 2012 of ‘dry’ and ‘warm’ hardly come as a surprise.  The month saw unseasonably mild temperatures and little in the way of precipitation despite it historically being our second snowiest month.

Above normal temperatures dominated the month from the start with eight out of the first nine days recording readings warmer than average.  Colder weather then arrived and brought Thornton and the Mile High City its first snowfall of the season.  The cooler temperatures did not last long and warmer weather returned for the majority of the balance of November.

Thornton saw an overall average temperature of 41.1 degrees.  Highs averaged 57.3 degrees down to an average low of 26.9 degrees.

Denver’s official average temperature of 43.5 degrees was slightly warmer than Thornton’s.  While mild, it was not warm enough to make it into the list of ‘top 10’ warmest Novembers on record.

Here in Thornton our warmest temperature of the month occurred on the 7th when the mercury climbed to 74.6 degrees.  The coldest morning occurred on Veterans Day (November 11) when temperatures dropped to a chilly 15.0 degrees.

Precipitation was lacking throughout the month as Thornton recorded a scant 0.37 inch in the bucket.  Denver officially recorded less at 0.27 inches.  Both measurements were below the average of 0.61 inch for November.

The season’s first snowfall occurred on the 10th of the month with 1.5 inches being recorded in Thornton.  Out at DIA they recorded slightly more at 1.7 inches.  On average Denver sees 8.7 inches of snow during November so we were well below average.

Click here to view Thornton’s November 2012 climatological report.

Thornton, Colorado November 2012 Temperature Summary

Thornton, Colorado November 2012 Precipitation Summary

Denver’s Official November 2012 Climate Summary

...THE DENVER CO CLIMATE SUMMARY FOR THE MONTH OF NOVEMBER 2012...

CLIMATE NORMAL PERIOD 1981 TO 2010
CLIMATE RECORD PERIOD 1872 TO 2012

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            77   11/07        67      10       69  11/24
LOWEST             13   11/11        -3      16       10  11/02
                                                          11/03
AVG. MAXIMUM     58.4              52.1     6.3     54.1
AVG. MINIMUM     28.5              24.5     4.0     24.8
MEAN             43.5              38.3     5.2     39.5
DAYS MAX >= 90      0               0.0     0.0        0
DAYS MAX = .01         1               4.7    -3.7        2
DAYS >= .10         1               1.6    -0.6        2
DAYS >= .50         0               0.0     0.0        0
DAYS >= 1.00        0               0.0     0.0        0
GREATEST
 24 HR. TOTAL    0.27   11/10 TO 11/10           11/01 TO 11/02

SNOWFALL (INCHES)
RECORDS
 TOTAL           42.6  1946
TOTALS            1.7               8.7

DEGREE_DAYS
HEATING TOTAL     638               801    -163      757
 SINCE 7/1       1195              1382    -187     1252
COOLING TOTAL       0                 0       0        0
 SINCE 1/1       1236               769     467      964

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

WIND (MPH)
AVERAGE WIND SPEED              8.4
RESULTANT WIND SPEED/DIRECTION   4/205
HIGHEST WIND SPEED/DIRECTION    29/220    DATE  11/09
HIGHEST GUST SPEED/DIRECTION    37/220    DATE  11/09

SKY COVER
POSSIBLE SUNSHINE (PERCENT)   MM
AVERAGE SKY COVER           0.50
NUMBER OF DAYS FAIR            5
NUMBER OF DAYS PC             24
NUMBER OF DAYS CLOUDY          1

AVERAGE RH (PERCENT)     44

WEATHER CONDITIONS. NUMBER OF DAYS WITH
THUNDERSTORM              0     MIXED PRECIP               0
HEAVY RAIN                0     RAIN                       0
LIGHT RAIN                0     FREEZING RAIN              0
LT FREEZING RAIN          0     HAIL                       0
HEAVY SNOW                1     SNOW                       1
LIGHT SNOW                2     SLEET                      0
FOG                       2     FOG W/VIS