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 17 1.34 1.41 4 1.41 4 0.00 0 0 4 0 5.9 2 2
Nov 17 0.95 0.16 2 0.16 2 0.00 0 0 2 0 0.1 1 1
Dec 17 0.73 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 18 0.55 0.65 3 0.65 3 0.00 0 0 3 0 6.0 2 2
Feb 18 0.56 0.29 2 0.29 2 0.00 0 0 2 0 4.7 2 2
March 18 1.86 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 18 2.30 0.27 1 0.27 1 0.00 0 0 1 0 2.5 1 1
May 18 2.63 0.22 1 0.22 1 0.00 0 0 1 0 0.0 0 0
June 18 2.05 0.03 1 0.03 1 0.00 0 0 1 0 0.0 0 0
July 18 2.45 0.79 5 0.79 5 0.00 0 0 5 0 0.0 0 0
Aug 18 2.46 0.25 1 0.25 1 0.00 0 0 1 0 0.0 0 0
Sept 18 1.24 0.61 3 0.61 3 0.00 0 0 3 0 0.0 0 0
Water Year Totals: 19.12" 4.68" 23 days 4.68" 23 0.00" 0 days 0 23 days 0 days 19.2" 8 days 8 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
10/1/2017
10/2/2017 0.19
10/3/2017 0.23
10/4/2017
10/5/2017
10/6/2017
10/7/2017
10/8/2017
10/9/2017 0.66
10/10/2017 0.33
10/11/2017
10/12/2017
10/13/2017
10/14/2017
10/15/2017
10/16/2017
10/17/2017
10/18/2017
10/19/2017
10/20/2017
10/21/2017
10/22/2017
10/23/2017
10/24/2017
10/25/2017
10/26/2017
10/27/2017
10/28/2017
10/29/2017
10/30/2017
10/31/2017
11/1/2017
11/2/2017
11/3/2017
11/4/2017
11/5/2017
11/6/2017
11/7/2017 0.11
11/8/2017 0.05
11/9/2017
11/10/2017
11/11/2017
11/12/2017
11/13/2017
11/14/2017
11/15/2017
11/16/2017
11/17/2017
11/18/2017
11/19/2017
11/20/2017
11/21/2017
11/22/2017
11/23/2017
11/24/2017
11/25/2017
11/26/2017
11/27/2017
11/28/2017
11/29/2017
11/30/2017
12/1/2017
12/2/2017
12/3/2017
12/4/2017
12/5/2017
12/6/2017
12/7/2017
12/8/2017
12/9/2017
12/10/2017
12/11/2017
12/12/2017
12/13/2017
12/14/2017
12/15/2017
12/16/2017
12/17/2017
12/18/2017
12/19/2017
12/20/2017
12/21/2017
12/22/2017
12/23/2017
12/24/2017
12/25/2017
12/26/2017
12/27/2017
12/28/2017
12/29/2017
12/30/2017
12/31/2017
Day of YearDaily PrcpMultiday Prcp
1/1/2018
1/2/2018
1/3/2018
1/4/2018
1/5/2018
1/6/2018
1/7/2018
1/8/2018
1/9/2018
1/10/2018
1/11/2018 0.03
1/12/2018
1/13/2018
1/14/2018
1/15/2018
1/16/2018
1/17/2018
1/18/2018
1/19/2018
1/20/2018
1/21/2018 0.28
1/22/2018 0.34
1/23/2018
1/24/2018
1/25/2018
1/26/2018
1/27/2018
1/28/2018
1/29/2018
1/30/2018
1/31/2018
2/1/2018
2/2/2018
2/3/2018
2/4/2018
2/5/2018
2/6/2018
2/7/2018
2/8/2018
2/9/2018
2/10/2018
2/11/2018 0.19
2/12/2018
2/13/2018
2/14/2018
2/15/2018
2/16/2018 0.10
2/17/2018
2/18/2018
2/19/2018
2/20/2018
2/21/2018
2/22/2018
2/23/2018
2/24/2018
2/25/2018
2/26/2018
2/27/2018
2/28/2018
3/1/2018
3/2/2018
3/3/2018
3/4/2018
3/5/2018
3/6/2018
3/7/2018
3/8/2018
3/9/2018
3/10/2018
3/11/2018
3/12/2018
3/13/2018
3/14/2018
3/15/2018
3/16/2018
3/17/2018
3/18/2018
3/19/2018
3/20/2018
3/21/2018
3/22/2018
3/23/2018
3/24/2018
3/25/2018
3/26/2018
3/27/2018
3/28/2018
3/29/2018
3/30/2018
3/31/2018
Day of YearDaily PrcpMultiday Prcp
4/1/2018
4/2/2018
4/3/2018
4/4/2018
4/5/2018
4/6/2018
4/7/2018
4/8/2018
4/9/2018
4/10/2018
4/11/2018
4/12/2018
4/13/2018 0.27
4/14/2018
4/15/2018
4/16/2018
4/17/2018
4/18/2018
4/19/2018
4/20/2018
4/21/2018
4/22/2018
4/23/2018
4/24/2018
4/25/2018
4/26/2018
4/27/2018
4/28/2018
4/29/2018
4/30/2018
5/1/2018
5/2/2018
5/3/2018
5/4/2018
5/5/2018
5/6/2018
5/7/2018
5/8/2018
5/9/2018
5/10/2018
5/11/2018
5/12/2018
5/13/2018
5/14/2018
5/15/2018
5/16/2018
5/17/2018
5/18/2018
5/19/2018
5/20/2018
5/21/2018
5/22/2018
5/23/2018
5/24/2018
5/25/2018
5/26/2018
5/27/2018
5/28/2018
5/29/2018 0.22
5/30/2018
5/31/2018
6/1/2018
6/2/2018
6/3/2018
6/4/2018
6/5/2018
6/6/2018
6/7/2018 0.03
6/8/2018
6/9/2018
6/10/2018
6/11/2018
6/12/2018
6/13/2018
6/14/2018
6/15/2018
6/16/2018
6/17/2018
6/18/2018
6/19/2018
6/20/2018
6/21/2018
6/22/2018
6/23/2018
6/24/2018
6/25/2018
6/26/2018
6/27/2018
6/28/2018
6/29/2018
6/30/2018
Day of YearDaily PrcpMultiday Prcp
7/1/2018
7/2/2018
7/3/2018 0.15
7/4/2018
7/5/2018 0.02
7/6/2018 0.05
7/7/2018
7/8/2018
7/9/2018 0.06
7/10/2018
7/11/2018
7/12/2018
7/13/2018
7/14/2018
7/15/2018
7/16/2018
7/17/2018
7/18/2018
7/19/2018
7/20/2018
7/21/2018
7/22/2018
7/23/2018
7/24/2018
7/25/2018
7/26/2018 0.51
7/27/2018
7/28/2018
7/29/2018
7/30/2018
7/31/2018
8/1/2018
8/2/2018
8/3/2018
8/4/2018
8/5/2018
8/6/2018
8/7/2018
8/8/2018
8/9/2018
8/10/2018
8/11/2018
8/12/2018
8/13/2018
8/14/2018
8/15/2018
8/16/2018
8/17/2018
8/18/2018
8/19/2018 0.25
8/20/2018
8/21/2018
8/22/2018
8/23/2018
8/24/2018
8/25/2018
8/26/2018
8/27/2018
8/28/2018
8/29/2018
8/30/2018
8/31/2018
9/1/2018
9/2/2018
9/3/2018
9/4/2018 0.24
9/5/2018
9/6/2018 0.30
9/7/2018
9/8/2018
9/9/2018
9/10/2018
9/11/2018
9/12/2018
9/13/2018
9/14/2018
9/15/2018
9/16/2018
9/17/2018
9/18/2018
9/19/2018
9/20/2018 0.07
9/21/2018
9/22/2018
9/23/2018
9/24/2018
9/25/2018
9/26/2018
9/27/2018
9/28/2018
9/29/2018
9/30/2018



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/2/2017 7:00 AM 0.19 M M M M
10/3/2017 7:00 AM 0.23 M M M M
10/9/2017 7:00 AM 0.66 3.0 M 3.0 M Snowing very lightly at obs time
10/10/2017 7:00 AM 0.33 2.9 M 4.1 M
11/7/2017 7:00 AM 0.11 M M M M Appeared to be all rain, commencing about midnight. Rain froze as it fell, leaving ice on all surfaces.
11/8/2017 7:00 AM 0.05 0.1 M 0.1 M Precipitation fell as freezing rain, then snow, between 4 PM and 9 PM
1/11/2018 7:00 AM 0.03 M M M M Rain in January at 5800’ elevation - this doesn’t happen too often. Précis began at about 4:30 PM on 1/109
1/21/2018 7:00 AM 0.28 3.5 0.28 3.5 M Very light snow at 7 AM observation. Calm wind
1/22/2018 7:00 AM 0.34 2.5 0.34 5.0 0.61 During the daylight hours of the 21st, wind was blowing as snow fell. I think I was able to get a fair measurement at 2.5 inches of new snow.
2/11/2018 7:00 AM 0.19 3.1 0.19 3.0 0.19
2/16/2018 7:00 AM 0.10 1.6 0.10 1.5 0.09
4/13/2018 7:00 AM 0.27 2.5 0.27 2.5 M
5/29/2018 7:00 AM 0.22 M M M M
6/7/2018 7:00 AM 0.03 M M M M
7/3/2018 7:00 AM 0.15 M M M M Beautiful torrential shower, coming straight down ( no wind). But only lasted about 5 minutes. Began at 10:09 PM. CTC lightening, but a quiet storm here; no close strikes.
7/5/2018 7:00 AM 0.02 M M M M
7/6/2018 7:00 AM 0.05 M M M M
7/9/2018 7:00 AM 0.06 M M M M Unexpected thunderstorm popped up at 6:30 PM. Cell was slow to move, so rain continued for almost an hour, but at an extremely light rate of precipitation
7/26/2018 7:00 AM 0.51 M M M M
8/19/2018 7:00 AM 0.25 M M M M After cool cloudy morning, a quick thunder and lightning storm dropped 0.06 at noon. Then another passing storm dropped 0.19 sometime before midnight (was asleep) No wind, no hail
9/4/2018 7:00 AM 0.24 M M M M Rain sometime in night while I was sleeping. No thunder (at least none loud enough to wake me)
9/6/2018 7:00 AM 0.30 0.0 M M M
9/20/2018 7:00 AM 0.07 M M M M Fi rst drops began falling at approx 4:45 PM, lasting about 20 min



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