Station Overview Station Location
Station Number CO-AR-321 Latitude 39.570286
Station Name Littleton 5.0 ESE Longitude -104.925979
County Arapahoe Elevation (ft) 5762



Month 30 Yr Avg by PRISM Total Prcp Sum Days Covered By All Observations Daily Prcp Sum Daily Observation Count Multiday Prcp Sum Days Covered by Multiday Observations Multiday Observation Count Days With Prcp Days With Trace Total Snowfall Days With Snowfall Days With Snow On Ground
Oct 16 1.34 0.21 3 0.21 3 0.00 0 0 3 0 0.0 0 0
Nov 16 0.95 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 16 0.73 0.42 1 0.42 1 0.00 0 0 1 0 6.5 1 0
Jan 17 0.55 0.23 1 0.23 1 0.00 0 0 1 0 3.5 1 0
Feb 17 0.56 0.31 1 0.31 1 0.00 0 0 1 0 4.2 1 1
March 17 1.86 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 17 2.30 1.57 6 1.57 6 0.00 0 0 6 0 9.0 2 2
May 17 2.63 2.86 7 2.86 7 0.00 0 0 7 0 6.0 2 2
June 17 2.05 0.83 4 0.83 4 0.00 0 0 4 0 0.0 0 0
July 17 2.45 1.97 6 1.97 6 0.00 0 0 6 0 0.0 0 0
Aug 17 2.46 0.05 1 0.05 1 0.00 0 0 1 0 0.0 0 0
Sept 17 1.24 1.29 5 1.29 5 0.00 0 0 5 0 0.0 0 0
Water Year Totals: 19.12" 9.74" 35 days 9.74" 35 0.00" 0 days 0 35 days 0 days 29.2" 7 days 5 days



Days in Water Year Cell Color Key
        Daily Observation with Prcp         Missing Day
        Multiday Observation         Daily/Multiday Observation Conflict

Day of Year Daily Prcp Multiday Prcp
10/1/2016
10/2/2016
10/3/2016
10/4/2016
10/5/2016
10/6/2016 0.12
10/7/2016 0.05
10/8/2016
10/9/2016
10/10/2016
10/11/2016
10/12/2016 0.04
10/13/2016
10/14/2016
10/15/2016
10/16/2016
10/17/2016
10/18/2016
10/19/2016
10/20/2016
10/21/2016
10/22/2016
10/23/2016
10/24/2016
10/25/2016
10/26/2016
10/27/2016
10/28/2016
10/29/2016
10/30/2016
10/31/2016
11/1/2016
11/2/2016
11/3/2016
11/4/2016
11/5/2016
11/6/2016
11/7/2016
11/8/2016
11/9/2016
11/10/2016
11/11/2016
11/12/2016
11/13/2016
11/14/2016
11/15/2016
11/16/2016
11/17/2016
11/18/2016
11/19/2016
11/20/2016
11/21/2016
11/22/2016
11/23/2016
11/24/2016
11/25/2016
11/26/2016
11/27/2016
11/28/2016
11/29/2016
11/30/2016
12/1/2016
12/2/2016
12/3/2016
12/4/2016
12/5/2016
12/6/2016
12/7/2016
12/8/2016
12/9/2016
12/10/2016
12/11/2016
12/12/2016
12/13/2016
12/14/2016
12/15/2016
12/16/2016
12/17/2016 0.42
12/18/2016
12/19/2016
12/20/2016
12/21/2016
12/22/2016
12/23/2016
12/24/2016
12/25/2016
12/26/2016
12/27/2016
12/28/2016
12/29/2016
12/30/2016
12/31/2016
Day of YearDaily PrcpMultiday Prcp
1/1/2017
1/2/2017
1/3/2017
1/4/2017
1/5/2017 0.23
1/6/2017
1/7/2017
1/8/2017
1/9/2017
1/10/2017
1/11/2017
1/12/2017
1/13/2017
1/14/2017
1/15/2017
1/16/2017
1/17/2017
1/18/2017
1/19/2017
1/20/2017
1/21/2017
1/22/2017
1/23/2017
1/24/2017
1/25/2017
1/26/2017
1/27/2017
1/28/2017
1/29/2017
1/30/2017
1/31/2017
2/1/2017
2/2/2017
2/3/2017
2/4/2017
2/5/2017
2/6/2017
2/7/2017
2/8/2017
2/9/2017
2/10/2017
2/11/2017
2/12/2017
2/13/2017
2/14/2017
2/15/2017
2/16/2017
2/17/2017
2/18/2017
2/19/2017
2/20/2017
2/21/2017
2/22/2017
2/23/2017
2/24/2017 0.31
2/25/2017
2/26/2017
2/27/2017
2/28/2017
3/1/2017
3/2/2017
3/3/2017
3/4/2017
3/5/2017
3/6/2017
3/7/2017
3/8/2017
3/9/2017
3/10/2017
3/11/2017
3/12/2017
3/13/2017
3/14/2017
3/15/2017
3/16/2017
3/17/2017
3/18/2017
3/19/2017
3/20/2017
3/21/2017
3/22/2017
3/23/2017
3/24/2017
3/25/2017
3/26/2017
3/27/2017
3/28/2017
3/29/2017
3/30/2017
3/31/2017
Day of YearDaily PrcpMultiday Prcp
4/1/2017
4/2/2017
4/3/2017
4/4/2017
4/5/2017
4/6/2017
4/7/2017
4/8/2017
4/9/2017
4/10/2017
4/11/2017
4/12/2017
4/13/2017
4/14/2017
4/15/2017
4/16/2017
4/17/2017
4/18/2017
4/19/2017
4/20/2017
4/21/2017 0.11
4/22/2017 0.10
4/23/2017
4/24/2017
4/25/2017 0.06
4/26/2017 0.18
4/27/2017
4/28/2017
4/29/2017 0.78
4/30/2017 0.34
5/1/2017
5/2/2017
5/3/2017
5/4/2017
5/5/2017
5/6/2017
5/7/2017
5/8/2017
5/9/2017
5/10/2017
5/11/2017
5/12/2017
5/13/2017
5/14/2017
5/15/2017
5/16/2017
5/17/2017
5/18/2017 1.19
5/19/2017 0.84
5/20/2017 0.04
5/21/2017
5/22/2017 0.09
5/23/2017 0.19
5/24/2017
5/25/2017
5/26/2017 0.31
5/27/2017
5/28/2017 0.20
5/29/2017
5/30/2017
5/31/2017
6/1/2017
6/2/2017
6/3/2017 0.47
6/4/2017
6/5/2017
6/6/2017
6/7/2017
6/8/2017 0.27
6/9/2017
6/10/2017
6/11/2017
6/12/2017
6/13/2017
6/14/2017
6/15/2017
6/16/2017
6/17/2017
6/18/2017
6/19/2017
6/20/2017
6/21/2017
6/22/2017
6/23/2017 0.06
6/24/2017 0.03
6/25/2017
6/26/2017
6/27/2017
6/28/2017
6/29/2017
6/30/2017
Day of YearDaily PrcpMultiday Prcp
7/1/2017
7/2/2017
7/3/2017
7/4/2017
7/5/2017
7/6/2017
7/7/2017
7/8/2017
7/9/2017
7/10/2017
7/11/2017
7/12/2017
7/13/2017 0.12
7/14/2017
7/15/2017
7/16/2017
7/17/2017
7/18/2017
7/19/2017
7/20/2017 0.06
7/21/2017
7/22/2017 0.15
7/23/2017
7/24/2017
7/25/2017
7/26/2017 0.14
7/27/2017 1.44
7/28/2017 0.06
7/29/2017
7/30/2017
7/31/2017
8/1/2017
8/2/2017
8/3/2017
8/4/2017
8/5/2017
8/6/2017
8/7/2017
8/8/2017
8/9/2017
8/10/2017
8/11/2017
8/12/2017
8/13/2017
8/14/2017
8/15/2017
8/16/2017
8/17/2017
8/18/2017
8/19/2017
8/20/2017
8/21/2017
8/22/2017
8/23/2017
8/24/2017
8/25/2017
8/26/2017
8/27/2017
8/28/2017
8/29/2017
8/30/2017
8/31/2017 0.05
9/1/2017
9/2/2017
9/3/2017
9/4/2017
9/5/2017
9/6/2017
9/7/2017
9/8/2017
9/9/2017
9/10/2017
9/11/2017
9/12/2017
9/13/2017
9/14/2017
9/15/2017
9/16/2017
9/17/2017
9/18/2017
9/19/2017
9/20/2017
9/21/2017
9/22/2017
9/23/2017
9/24/2017 0.50
9/25/2017 0.25
9/26/2017 0.05
9/27/2017
9/28/2017 0.46
9/29/2017
9/30/2017 0.03



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/6/2016 7:00 AM 0.12 M M M M
10/7/2016 7:00 AM 0.05 M M M M
10/12/2016 7:00 AM 0.04 M M M M
12/17/2016 7:00 AM 0.42 6.5 0.42 M M very light snow at time of observation 0.0F
1/5/2017 7:00 AM 0.23 3.5 0.23 M M at 7 AM, light snow, calm wind, 5 degrees F
2/24/2017 7:00 AM 0.31 4.2 0.31 4.2 M Light snow at observation time
4/21/2017 7:00 AM 0.11 M M M M Forecast of a spring soaker turned to a bust. (but, yet, climate scientists are telling me with certainty that they know within 0.1 degree C what the average temp in North America will be in 2050)
4/22/2017 7:00 AM 0.10 M M M M
4/25/2017 7:00 AM 0.06 M M M M
4/26/2017 7:00 AM 0.18 M M M M
4/29/2017 7:00 AM 0.78 6.5 M 6.5 M Began with a few raindrops, then rain/snow mix that quickly changed to all snow. Thundersnow at 5 PM. Snowing lightly at 7AM observation.
4/30/2017 7:00 AM 0.34 2.5 M 8.0 M
5/18/2017 7:00 AM 1.19 2.5 0.46 M M Rain throughout the night. Snow commenced about 4 AM, and snow was falling at observation time.
5/19/2017 7:00 AM 0.84 3.5 M 4.0 M Difficult to get an accurate measurement of new snow that fell in past 24 hours. Warmer rain, mixing with the snow, caused fallen snow to melt before I could measure.
5/20/2017 7:00 AM 0.04 M M 1.5 M
5/22/2017 7:00 AM 0.09 M M M M
5/23/2017 7:00 AM 0.19 M M M M rain began at approx 6PM, accompanied by strong gusty winds but no lightening or thunder.
5/26/2017 7:00 AM 0.31 M M M M Rain began at 12:50 PM. Heavy for 15 minutes. Accompanied by hail - mostly rice size, some pea size. Ground covered in white. Not until the storm had passed at 1:10 AM did we hear any thunder, then just 2 distant flashes followed by a rumble. Generally, rain does not fall at such a heavy rate in silence (i.e., no lightening and thunder). Last night was an exception
5/28/2017 7:00 AM 0.20 M M M M
6/3/2017 7:00 AM 0.47 M M M M Afternoon thunderstorm brought a nice, even paced rain.
6/8/2017 7:00 AM 0.27 M M M M storm cell moving from NW to the SE. Thunder and lightening began at 10:02 PM, rain a minute later, and continued until 10:25 PM
6/23/2017 7:00 AM 0.06 M M M M light wind blown rain at time of observation.
6/24/2017 7:00 AM 0.03 M M M M
7/13/2017 7:00 AM 0.12 M M M M gentle rain began 8:40 PM, no thunder
7/20/2017 6:00 AM 0.06 M M M M
7/22/2017 7:00 AM 0.15 M M M M Plenty of dark clouds and rumbling of thunder during the afternoon and early evening (between 1PM and 8PM), but just a little splash rain.
7/26/2017 7:00 AM 0.14 M M M M light rain; quiet storm with just a couple rumbles of thunder.
7/27/2017 7:00 AM 1.44 M M M M Beautiful rain. Started around 8:30 PM. Moderate for a while, then turned heavier around 9:15 PM Lots of CC lightning but no crashing thunder, just rumbling. It has been months since we have seen a rain this nice.
7/28/2017 7:00 AM 0.06 M M M M
8/31/2017 7:00 AM 0.05 M M M M thunderstorm commenced at approx 3:30 PM light rain, soft thunder from CTC lightning
9/24/2017 7:00 AM 0.50 M M M M
9/25/2017 7:00 AM 0.25 M M M M Light rain throughout the night, but by observation time, no precipitation was falling. Winds calm.
9/26/2017 7:00 AM 0.05 M M M M
9/28/2017 7:00 AM 0.46 M M M M heaviest rain fell (I think) between 3AM and 5AM. Still dripping a little at 7AM. Air calm.
9/30/2017 7:00 AM 0.03 M M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes



Observation Date Observation Time Notes Largest Stone Size Average Stone Size Smallest Stone Size Stone Consistency Duration Minutes Durration Accuracy Damage Timing More Rain than Hail Hail Started Largest Hail Started Angle of Impact Number of Stones on Pad Distance Between Stones on Pad Depth of Stones on Ground
1/1/0001 12:00 AM Depth of hail on the ground is a guess. I can confirm that hail quantity was enough to cover the ground in white. 1/4" Pea Size Rice Rice Mixed|White Ice 12 2min no damage Continuous True After rain Same time as smaller hail 10-20 0.25