Station Overview Station Location
Station Number IA-LY-6 Latitude 43.4688971
Station Name Rock Rapids 3.0 N Longitude -96.1560443
County Lyon Elevation (ft) 1365



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 2.12 4.80 31 2.72 3 2.08 28 4 3 0 0.0 0 0
Nov 17 1.47 0.04 30 0.00 0 0.04 30 1 0 0 0.0 0 0
Dec 17 0.81 0.27 31 0.01 1 0.26 30 3 1 0 0.2 1 0
Jan 18 0.58 0.56 31 0.00 0 0.56 31 5 0 0 0.0 0 0
Feb 18 0.60 0.87 28 0.00 0 0.87 28 3 0 0 0.0 0 0
March 18 1.75 0.91 31 0.00 0 0.91 31 1 0 0 0.0 0 0
April 18 3.07 2.67 15 0.06 1 2.61 14 3 1 0 0.0 0 1
May 18 3.29 3.54 29 2.38 8 1.16 21 5 8 0 0.0 0 0
June 18 4.55 9.87 26 2.84 4 7.03 22 7 4 0 0.0 0 0
July 18 3.56 3.62 31 1.42 6 2.20 25 6 5 0 0.0 0 0
Aug 18 3.26 4.53 30 1.41 8 3.12 22 6 5 0 0.0 0 0
Sept 18 3.10 7.21 30 6.88 6 0.33 24 4 4 0 0.0 0 0
Water Year Totals: 28.16" 38.89" 343 days 17.72" 37 21.17" 306 days 48 31 days 0 days 0.2" 1 days 1 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 0.53
10/2/2017 0.25
10/3/2017 1.94
10/4/2017 **
10/5/2017 **
10/6/2017 **
10/7/2017 **
10/8/2017 **
10/9/2017 **
10/10/2017 **
10/11/2017 **
10/12/2017 1.85
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 0.07
10/22/2017 **
10/23/2017 0.08
10/24/2017 **
10/25/2017 **
10/26/2017 **
10/27/2017 **
10/28/2017 **
10/29/2017 **
10/30/2017 0.08
10/31/2017 **
11/1/2017 **
11/2/2017 0.04
11/3/2017 **
11/4/2017 **
11/5/2017 **
11/6/2017 **
11/7/2017 **
11/8/2017 **
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 0.00
12/5/2017 0.01
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 0.04
12/23/2017 **
12/24/2017 **
12/25/2017 **
12/26/2017 **
12/27/2017 **
12/28/2017 **
12/29/2017 0.22
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 0.00
1/11/2018 **
1/12/2018 0.03
1/13/2018 **
1/14/2018 **
1/15/2018 **
1/16/2018 **
1/17/2018 **
1/18/2018 **
1/19/2018 **
1/20/2018 0.05
1/21/2018 **
1/22/2018 **
1/23/2018 0.33
1/24/2018 **
1/25/2018 **
1/26/2018 **
1/27/2018 **
1/28/2018 0.15
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 **
2/12/2018 **
2/13/2018 0.37
2/14/2018 **
2/15/2018 **
2/16/2018 **
2/17/2018 **
2/18/2018 **
2/19/2018 **
2/20/2018 0.19
2/21/2018 **
2/22/2018 **
2/23/2018 **
2/24/2018 0.31
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 0.91
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 1.72
4/8/2018 **
4/9/2018 0.35
4/10/2018
4/11/2018
4/12/2018
4/13/2018
4/14/2018
4/15/2018 M
4/16/2018 **
4/17/2018 **
4/18/2018 **
4/19/2018 **
4/20/2018 0.54
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 0.06
5/1/2018
5/2/2018 0.12
5/3/2018
5/4/2018 0.07
5/5/2018 **
5/6/2018 **
5/7/2018 **
5/8/2018 0.32
5/9/2018 0.47
5/10/2018 0.09
5/11/2018 1.34
5/12/2018 0.04
5/13/2018 **
5/14/2018 0.07
5/15/2018 0.23
5/16/2018 **
5/17/2018 **
5/18/2018 **
5/19/2018 0.00
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 0.42
5/29/2018 **
5/30/2018 0.35
5/31/2018 0.02
6/1/2018
6/2/2018 0.47
6/3/2018
6/4/2018
6/5/2018
6/6/2018 0.11
6/7/2018 **
6/8/2018 **
6/9/2018 **
6/10/2018 1.59
6/11/2018 **
6/12/2018 **
6/13/2018 **
6/14/2018 0.42
6/15/2018 **
6/16/2018 M
6/17/2018 **
6/18/2018 1.11
6/19/2018 **
6/20/2018 **
6/21/2018 3.78
6/22/2018 **
6/23/2018 **
6/24/2018 0.10
6/25/2018 0.79
6/26/2018 1.47
6/27/2018 **
6/28/2018 **
6/29/2018 **
6/30/2018 0.03
Day of YearDaily PrcpMultiday Prcp
7/1/2018 0.67
7/2/2018 0.09
7/3/2018 **
7/4/2018 0.00
7/5/2018 0.34
7/6/2018 **
7/7/2018 0.00
7/8/2018 **
7/9/2018 **
7/10/2018 0.00
7/11/2018 **
7/12/2018 **
7/13/2018 1.90
7/14/2018 0.23
7/15/2018 **
7/16/2018 0.04
7/17/2018 0.00
7/18/2018 **
7/19/2018 0.26
7/20/2018 0.09
7/21/2018 **
7/22/2018 **
7/23/2018 **
7/24/2018 **
7/25/2018 **
7/26/2018 **
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 0.80
8/5/2018 0.19
8/6/2018 0.14
8/7/2018 0.42
8/8/2018 0.00
8/9/2018 0.00
8/10/2018 0.00
8/11/2018 **
8/12/2018 0.00
8/13/2018 **
8/14/2018 **
8/15/2018 0.02
8/16/2018 **
8/17/2018 **
8/18/2018 1.78
8/19/2018
8/20/2018 0.49
8/21/2018 0.17
8/22/2018 **
8/23/2018 **
8/24/2018 **
8/25/2018 **
8/26/2018 **
8/27/2018 **
8/28/2018 0.52
8/29/2018 **
8/30/2018 **
8/31/2018 0.00
9/1/2018 0.00
9/2/2018 **
9/3/2018 **
9/4/2018 0.00
9/5/2018 1.29
9/6/2018 0.00
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 0.20
9/19/2018 1.61
9/20/2018 2.88
9/21/2018 1.10
9/22/2018 **
9/23/2018 **
9/24/2018 0.00
9/25/2018 **
9/26/2018 0.13
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
10/1/2017 11:00 AM 0.53 M M M M
10/2/2017 9:00 AM 0.25 M M M M
10/3/2017 6:00 PM 1.94 M M M M
12/5/2017 7:00 AM 0.01 0.2 0.01 M M
4/15/2018 3:30 PM M M M 3.0 0.86 Gauge had roughly an inch of rain in it Friday afternoon but the wind knocked it over, so no measurements of new precipitation - except snow on ground this afternoon. Temp near 32 and sun had settled the snow by the time depth was measured.
4/30/2018 7:00 AM 0.06 M M M M
5/2/2018 8:40 AM 0.12 M M M M
5/4/2018 7:00 AM 0.07 M M M M
5/9/2018 7:00 AM 0.47 M M M M
5/10/2018 7:00 AM 0.09 M M M M
5/11/2018 7:00 AM 1.34 M M M M
5/12/2018 7:00 AM 0.04 M M M M
5/15/2018 7:00 AM 0.23 M M M M
5/31/2018 7:00 AM 0.02 M M M M
6/2/2018 7:00 AM 0.47 M M M M
6/6/2018 7:00 AM 0.11 M M M M
6/25/2018 7:00 AM 0.79 M M M M
6/26/2018 7:00 AM 1.47 M M M M
7/1/2018 7:00 AM 0.67 M M M M
7/2/2018 7:00 AM 0.09 M M M M
7/5/2018 7:00 AM 0.34 M M M M
7/14/2018 7:00 AM 0.23 M M M M
7/17/2018 7:00 AM 0.00 0.0 M M M
7/20/2018 7:00 AM 0.09 M M M M
8/5/2018 7:00 AM 0.19 M M M M
8/6/2018 7:00 AM 0.14 M M M M
8/7/2018 7:00 AM 0.42 M M M M
8/8/2018 7:00 AM 0.00 0.0 M M M
8/9/2018 7:00 AM 0.00 0.0 M M M
8/10/2018 7:00 AM 0.00 0.0 M M M
8/20/2018 7:00 AM 0.49 M M M M
8/21/2018 7:00 AM 0.17 M M M M
9/1/2018 7:00 AM 0.00 0.0 M M M
9/5/2018 7:00 AM 1.29 M M M M
9/6/2018 7:00 AM 0.00 0.0 M M M
9/19/2018 7:15 AM 1.61 M M M M
9/20/2018 7:15 AM 2.88 M M M M
9/21/2018 7:00 AM 1.10 M M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
10/4/2017 10/12/2017 12:00 PM 9 1.85 M M
10/13/2017 10/21/2017 9:00 AM 9 0.07 M M All precip in last 24 hr.
10/22/2017 10/23/2017 11:00 AM 2 0.08 M M
10/24/2017 10/30/2017 1:15 PM 7 0.08 M M
10/31/2017 11/02/2017 9:00 AM 3 0.04 M M
11/3/2017 12/04/2017 11:00 AM 32 0.00 0.0 M
12/6/2017 12/22/2017 10:15 AM 17 0.04 1.0 0.04 All precipitation was in last 24 hours.
12/23/2017 12/29/2017 2:30 PM 7 0.22 3.9 0.29
12/30/2017 1/10/2018 3:00 PM 12 0.00 1.6 0.35
1/11/2018 1/12/2018 10:00 AM 2 0.03 M M Snow on ground crusty and uneven. Snow frozen to ground and can't take good core. Estimate close to same water content as last measurement.
1/13/2018 1/20/2018 2:10 PM 8 0.05 M M Snow cover spotty.
1/21/2018 1/23/2018 11:00 AM 3 0.33 3.5 0.33
1/24/2018 1/28/2018 11:30 AM 5 0.15 2.0 0.15 Old snow had melted off in areas. Only the new snow was measured.
1/29/2018 2/13/2018 7:00 AM 16 0.37 3.9 0.37
2/14/2018 2/20/2018 11:00 AM 7 0.19 3.9 0.97
2/21/2018 2/24/2018 5:00 PM 4 0.31 4.0 1.02
2/25/2018 3/07/2018 2:00 PM 11 0.91 1.6 M Most precipitation came as rain or sleet.
3/8/2018 4/07/2018 10:00 AM 31 1.72 0.0 M Only snow is in scattered areas.
4/8/2018 4/09/2018 11:00 AM 2 0.35 4.3 0.35
4/16/2018 4/20/2018 10:00 AM 5 0.54 0.0 M Snow remaining only in areas where drifted.
5/5/2018 5/08/2018 7:00 AM 4 0.32 M M All rain in last 24 hr.
5/13/2018 5/14/2018 7:00 AM 2 0.07 M M
5/16/2018 5/19/2018 7:00 AM 4 0.00 M M
5/20/2018 5/28/2018 7:00 AM 9 0.42 M M
5/29/2018 5/30/2018 8:55 AM 2 0.35 M M
6/7/2018 6/10/2018 7:00 AM 4 1.59 M M
6/11/2018 6/14/2018 7:00 AM 4 0.42 M M All precipitation in last 8 hours.
6/15/2018 6/16/2018 7:00 AM 2 M M M All precipitation in past 24 hr. {EDIT: Observer reported 17.00 for multi-day precip. This is high and appears to be a decimal typo. Changed report of 17.00 to NA until observer can be contacted to verify. Submission Time Before EDIT: 6/16/2018 5:25 PM CoCoSTAFF DNT}
6/17/2018 6/18/2018 7:00 AM 2 1.11 M M All precipitation in past 12 hours.
6/19/2018 6/21/2018 7:00 AM 3 3.78 M M All precipitation in past 24 hr.
6/22/2018 6/24/2018 7:00 AM 3 0.10 M M
6/27/2018 6/30/2018 7:00 AM 4 0.03 M M
7/3/2018 7/04/2018 7:00 AM 2 0.00 M M
7/6/2018 7/07/2018 7:00 AM 2 0.00 M M
7/8/2018 7/10/2018 7:00 AM 3 0.00 M M
7/11/2018 7/13/2018 7:00 AM 3 1.90 M M All precipitation in last 24 hr.
7/15/2018 7/16/2018 7:00 AM 2 0.04 M M Precipitation happened about 5-6 PM 7/15.
7/18/2018 7/19/2018 6:55 AM 2 0.26 M M
7/21/2018 8/04/2018 7:00 AM 15 0.80 M M
8/11/2018 8/12/2018 7:00 AM 2 0.00 M M
8/13/2018 8/15/2018 7:00 AM 3 0.02 M M All precipitation in last 24 hr. Brief shower about 1:30 PM yesterday.
8/16/2018 8/18/2018 7:00 AM 3 1.78 M M
8/22/2018 8/28/2018 7:00 PM 7 0.52 M M
8/29/2018 8/31/2018 7:00 AM 3 0.00 M M
9/2/2018 9/04/2018 7:00 AM 3 0.00 M M
9/7/2018 9/18/2018 7:55 AM 12 0.20 M M All precipitation occurred around 6:30 AM this morning.
9/22/2018 9/24/2018 7:00 AM 3 0.00 M M
9/25/2018 9/26/2018 7:00 AM 2 0.13 M M
9/27/2018 10/02/2018 7:00 AM 6 0.04 M M



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