Station Overview Station Location
Station Number CAN-QC-37 Latitude 45.553589
Station Name Laval 3.8 SSW Longitude -73.769761
County Quebec Elevation (ft) 116



Month 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 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 17 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 17 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 18 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 18 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 18 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 18 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 18 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
June 18 3.43 30 3.43 26 0.00 4 2 11 1 0.0 0 0
July 18 3.42 31 3.42 29 0.00 2 1 12 0 0.0 0 0
Aug 18 2.06 31 2.06 31 0.00 0 0 14 0 0.0 0 0
Sept 18 3.85 29 3.85 26 0.00 3 1 9 1 0.0 0 0
Water Year Totals: 12.76" 121 days 12.76" 112 0.00" 9 days 4 46 days 2 days 0.0" 0 days 0 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
10/3/2017
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
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
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
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
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
1/22/2018
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
2/12/2018
2/13/2018
2/14/2018
2/15/2018
2/16/2018
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
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 M
5/27/2018 M
5/28/2018 M
5/29/2018
5/30/2018
5/31/2018
6/1/2018 0.01
6/2/2018 **
6/3/2018 0.00
6/4/2018 0.59
6/5/2018 0.59
6/6/2018 **
6/7/2018 T
6/8/2018 0.00
6/9/2018 0.00
6/10/2018 0.00
6/11/2018 0.00
6/12/2018 0.00
6/13/2018 0.00
6/14/2018 0.59
6/15/2018 0.11
6/16/2018 0.00
6/17/2018 0.00
6/18/2018 0.32
6/19/2018 0.65
6/20/2018 0.00
6/21/2018 0.01
6/22/2018 0.00
6/23/2018 0.00
6/24/2018 0.24
6/25/2018 0.23
6/26/2018 0.00
6/27/2018 0.00
6/28/2018 0.09
6/29/2018 T
6/30/2018 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2018 0.03
7/2/2018 0.00
7/3/2018 0.00
7/4/2018 0.00
7/5/2018 0.00
7/6/2018 0.02
7/7/2018 0.00
7/8/2018 **
7/9/2018 0.00
7/10/2018 0.00
7/11/2018 0.03
7/12/2018 0.00
7/13/2018 0.00
7/14/2018 0.01
7/15/2018 0.02
7/16/2018 0.00
7/17/2018 1.17
7/18/2018 0.00
7/19/2018 0.00
7/20/2018 0.00
7/21/2018 0.00
7/22/2018 0.00
7/23/2018 0.26
7/24/2018 0.01
7/25/2018 0.14
7/26/2018 1.10
7/27/2018 0.01
7/28/2018 0.00
7/29/2018 0.62
7/30/2018 0.00
7/31/2018 0.00
8/1/2018 0.00
8/2/2018 0.01
8/3/2018 0.00
8/4/2018 0.00
8/5/2018 0.12
8/6/2018 0.00
8/7/2018 0.06
8/8/2018 0.12
8/9/2018 0.12
8/10/2018 0.00
8/11/2018 0.00
8/12/2018 0.00
8/13/2018 0.00
8/14/2018 0.00
8/15/2018 0.70
8/16/2018 0.01
8/17/2018 0.00
8/18/2018 0.27
8/19/2018 0.00
8/20/2018 0.00
8/21/2018 0.00
8/22/2018 0.09
8/23/2018 0.01
8/24/2018 0.00
8/25/2018 0.00
8/26/2018 0.00
8/27/2018 0.11
8/28/2018 0.29
8/29/2018 0.07
8/30/2018 0.08
8/31/2018 0.00
9/1/2018 0.00
9/2/2018 0.00
9/3/2018 0.28
9/4/2018 0.30
9/5/2018 0.10
9/6/2018 0.00
9/7/2018 0.00
9/8/2018 **
9/9/2018 0.00
9/10/2018 0.00
9/11/2018 0.88
9/12/2018 0.02
9/13/2018 0.00
9/14/2018 0.00
9/15/2018 0.00
9/16/2018 0.00
9/17/2018 0.00
9/18/2018 0.00
9/19/2018 0.00
9/20/2018 0.00
9/21/2018 0.14
9/22/2018 1.43
9/23/2018 0.00
9/24/2018 0.00
9/25/2018 T
9/26/2018 0.60
9/27/2018 0.10
9/28/2018 0.00
9/29/2018
9/30/2018 **



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
5/26/2018 8:00 AM M M M M M First report using existing "personal" wedge raingauge while waiting delivery of "official" gauge. Weak thunder rumblings between 5:47 and 6:05 AM. From radar, Tstorm crossing West-Island at ~6:AM. Motion NW to SE. Presently light-moderate rain at 8 AM. More rain is expected in the coming hour(s) according to the McGill radar.
5/27/2018 8:00 AM M M M M M Tail end of the precipitation system that affected the Montreal area yesterday morning.
5/28/2018 8:00 AM M M M M M A more precise reading would be 0.006 in. (according to my wedge raingauge) but apparently I am not allowed to enter a value smaller than 0.01. Precip. from very light and brief showers yesterday afternoon.
6/1/2018 8:00 AM 0.01 M M M M First official report with a CoCoRaHS raingauge. The actual measurement was somewhat less than 0.01 but more than 0.005. The measurement from the existing nearby wedge raingauge also indicated a value of the order of 0.007".
6/4/2018 8:00 AM 0.59 M M M M Light precipitation is persisting at observation time. Cold, 8 C, and moderately windy. The wedge gauge registered 0.57", the accuracy being limited by the 0.02" intervals available near that amount and in considering a more significant meniscus effect. The McGill 24-h accumulation at 0800 agrees very well with both measurements, showing a total of the order of 15 mm (0.60") at my location and also revealing that the steady continuous light precipitation will end in about an hour or two, and will become scattered afterwards.
6/5/2018 8:00 AM 0.59 M M M M The exact identical amount as yesterday. The wedge gauge registered 0.58" (+-0.01" due to meniscus uncertainties).
6/8/2018 8:00 AM 0.00 0.0 M M M
6/9/2018 7:00 AM 0.00 0.0 M M M This is on hour before my normal observation time of 8 AM but it could be considered as one made at 8 anyway as no precip. whatsoever is expected in the next hour.
6/10/2018 8:00 AM 0.00 0.0 M M M
6/11/2018 8:00 AM 0.00 0.0 M M M
6/12/2018 8:00 AM 0.00 0.0 M M M
6/13/2018 8:00 AM 0.00 0.0 M M M
6/14/2018 8:00 AM 0.59 M M M M Light rain stopped just minutes before the observation time. The squall line heading for Montreal last evening at 8 PM weakened split and weakened before reaching Montreal. 0.58 on the wedge raingauge
6/15/2018 8:00 AM 0.11 M M M M The same amount, 0.11", from the wedge gauge
6/16/2018 7:00 AM 0.00 0.0 M M M
6/17/2018 8:00 AM 0.00 0.0 M M M
6/18/2018 8:00 AM 0.32 M M M M The water level was actually half-way between 0.32" and 0.33" but the software does not allow me to enter 0.325". The wedge gauge showed 0.32"
6/19/2018 8:00 AM 0.65 M M M M A succession of showers and Tshowers on the 18th. The wedge gauge registered marginally less at 0.62"
6/20/2018 8:00 AM 0.00 0.0 M M M
6/21/2018 8:00 AM 0.01 M M M M The wedge gauge registered 0.02"
6/22/2018 8:00 AM 0.00 0.0 M M M
6/23/2018 7:00 AM 0.00 0.0 M M M
6/24/2018 8:00 AM 0.24 M M M M
6/25/2018 8:00 AM 0.23 M M M M 0.22" on the wedge raingage.
6/26/2018 8:00 AM 0.00 0.0 M M M
6/27/2018 8:00 AM 0.00 0.0 M M M
6/28/2018 8:00 AM 0.09 M M M M More accurately, by interpolating between the line divisions, 0.095", and the same identical reading from the wedge raingauge.
6/29/2018 8:00 AM T M M M M Very small dew droplets covered the gauge.
6/30/2018 7:00 AM 0.00 0.0 M M M
7/1/2018 8:00 AM 0.03 0.0 M M M Likewise on the wedge gauge
7/2/2018 8:00 AM 0.00 0.0 M M M
7/3/2018 8:00 AM 0.00 0.0 M M M
7/4/2018 8:00 AM 0.00 0.0 M M M
7/5/2018 8:00 AM 0.00 0.0 M M M
7/6/2018 8:00 AM 0.02 M M M M 0.02" also on the wedge gauge. Typical summer convective situation. 24-h McGill radar accumulation shows amounts of the order of ~0.80" just a few kilometers away and vast areas of over 2 inches within 200 km from Montreal. I would have liked some of that rain.
7/7/2018 7:00 AM 0.00 0.0 M M M
7/10/2018 8:00 AM 0.00 0.0 M M M
7/11/2018 8:00 AM 0.03 M M M M The same on the wedge gauge
7/12/2018 8:00 AM 0.00 0.0 M M M
7/13/2018 8:00 AM 0.00 0.0 M M M
7/14/2018 7:00 AM 0.01 M M M M Actually both the CoCoRaHS and wedge gauges clearly showed 0.005", but the software does not allow to input at a precision of three decimal places.
7/15/2018 8:00 AM 0.02 M M M M Actually in-between the 0.01 and the 0.02 interval. Almost 0.03 on the wedge gauge
7/16/2018 8:00 AM 0.00 0.0 M M M
7/17/2018 8:00 AM 1.17 M M M M 1.15" on the wedge gauge.
7/18/2018 8:00 AM 0.00 0.0 M M M
7/19/2018 8:00 AM 0.00 0.0 M M M
7/20/2018 6:00 AM 0.00 0.0 M M M
7/21/2018 7:00 AM 0.00 0.0 M M M
7/22/2018 8:00 AM 0.00 0.0 M M M
7/23/2018 8:00 AM 0.26 M M M M 0.24" on the wedge gauge
7/24/2018 8:00 AM 0.01 M M M M Almost 0.02" on the wedge gauge.
7/25/2018 8:00 AM 0.14 M M M M Light rain at moment of observation. According to the radar, a wide band of light to moderate precipitation will cross the Montreal area in the coming hours. 0.14" also registered on the wedge gauge.
7/26/2018 8:00 AM 1.10 M M M M 1.08" on the wedge gauge
7/27/2018 8:00 AM 0.01 M M M M Actually between 0.01" and 0.02". The wedge gauge registered nearly 0.03"
7/28/2018 7:00 AM 0.00 0.0 M M M
7/29/2018 8:00 AM 0.62 M M M M 0.60" on the wedge gauge. All but 0.01" fell during the period of 7:55 PM to 8:25 PM 28 July 2018
7/30/2018 8:00 AM 0.00 0.0 M M M
7/31/2018 8:00 AM 0.00 0.0 M M M
8/1/2018 8:00 AM 0.00 0.0 M M M
8/2/2018 8:00 AM 0.01 M M M M The usual trend continues with the wedge gauge measuring slightly more, (0.02"), than the CoCoRaHS gauge at low amounts.
8/3/2018 8:00 AM 0.00 0.0 M M M
8/4/2018 7:00 AM 0.00 0.0 M M M
8/5/2018 8:00 AM 0.12 M M M M 0.11" on the wedge gauge
8/6/2018 8:00 AM 0.00 0.0 M M M
8/7/2018 8:00 AM 0.06 M M M M Same amount on the wedge gauge. Light rain at moment of observation.
8/8/2018 8:00 AM 0.12 M M M M 0.13 on the wedge gauge
8/9/2018 8:00 AM 0.12 M M M M 0.13" on the wedge gauge. Identical results to yesterday. Much higher, highly localized amounts, > 2" nearby in Montreal East and elsewhere according to McGill's radar 24-h accumulation. Note: server down for the 24-h acc. on the 8th.
8/10/2018 8:00 AM 0.00 0.0 M M M
8/11/2018 8:00 AM 0.00 0.0 M M M
8/12/2018 8:00 AM 0.00 0.0 M M M
8/13/2018 8:00 AM 0.00 0.0 M M M
8/14/2018 9:00 AM 0.00 0.0 M M M
8/15/2018 6:00 AM 0.70 M M M M Same on the wedge gauge. According to the McGill radar accumulation product, it was a very highly localized storm, centred right over my location.
8/16/2018 8:00 AM 0.01 M M M M Slightly less than 0.01" on the CoCoRaHS gauge and slightly more than 0.01" on the wedge gauge.
8/17/2018 8:00 AM 0.00 0.0 M M M
8/18/2018 8:00 AM 0.27 M M M M 0.26" on the wedge gauge
8/19/2018 7:00 AM 0.00 0.0 M M M
8/20/2018 8:00 AM 0.00 0.0 M M M
8/21/2018 8:00 AM 0.00 0.0 M M M
8/22/2018 8:00 AM 0.09 M M M M Same amount on the wedge gauge
8/23/2018 8:00 AM 0.01 M M M M Same on the wedge gauge
8/24/2018 8:00 AM 0.00 0.0 M M M
8/25/2018 7:00 AM 0.00 0.0 M M M
8/26/2018 8:00 AM 0.00 0.0 M M M
8/27/2018 8:00 AM 0.11 M M M M Same amount on the wedge gauge
8/28/2018 8:00 AM 0.29 M M M M 0.30" on the wedge gauge
8/29/2018 8:00 AM 0.07 M M M M 0.08" on the wedge gauge
8/30/2018 7:00 AM 0.08 M M M M Actually, 0.075 on the CoCoRaHS gauge, and nearly 0.10 on the wedge gauge. Nearly all this amount fell in a 5-min period between 2:58 PM and 3:03 PM yesterday.
8/31/2018 8:00 AM 0.00 0.0 M M M
9/1/2018 7:00 AM 0.00 0.0 M M M
9/2/2018 8:00 AM 0.00 0.0 M M M
9/3/2018 8:00 AM 0.28 M M M M 0.29" on the wedge gauge
9/4/2018 8:00 AM 0.30 M M M M Same amount on the wedge gauge
9/5/2018 8:00 AM 0.10 M M M M Also 0.10" on the wedge gauge
9/6/2018 8:00 AM 0.00 0.0 M M M
9/7/2018 8:00 AM 0.00 0.0 M M M
9/10/2018 8:00 AM 0.00 0.0 M M M
9/11/2018 8:00 AM 0.88 M M M M 0.86 on the wedge gauge. Light drizzle at time of observation.
9/12/2018 8:00 AM 0.02 M M M M 0.03" on the wedge gauge. (The tail end of the precip. event of the previous day)
9/13/2018 7:00 AM 0.00 0.0 M M M
9/14/2018 8:00 AM 0.00 0.0 M M M
9/15/2018 7:00 AM 0.00 0.0 M M M
9/16/2018 8:00 AM 0.00 0.0 M M M
9/17/2018 8:00 AM 0.00 0.0 M M M
9/18/2018 8:00 AM 0.00 0.0 M M M
9/19/2018 8:00 AM 0.00 0.0 M M M
9/20/2018 8:00 AM 0.00 0.0 M M M
9/21/2018 8:00 AM 0.14 M M M M 0.13" on the wedge gauge. Light rain at measuring time.
9/22/2018 8:00 AM 1.43 M M M M 1.39" on the wedge gauge. This is the first significant difference between the two gauges.
9/23/2018 8:00 AM 0.00 0.0 M M M
9/24/2018 8:00 AM 0.00 0.0 M M M
9/25/2018 8:00 AM T M M M M Beginning of a precipitation event
9/26/2018 8:00 AM 0.60 M M M M To be more precise, the CoCoRaHS gauge measured 0.595" and the wedge gauge just over 0.58".
9/27/2018 8:00 AM 0.10 M M M M 0.11" on the wedge gauge
9/28/2018 8:00 AM 0.00 0.0 M M M Will be away for the next three days. Next measurement will be on October 1st.



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
6/2/2018 6/03/2018 8:00 AM 2 0.00 M M 2-day period from 0800 1st June to 0800 3rd of June. No precip at my location in Laval, but many areas of significant precipitation within 240 km from the McGill radar located just west of Montreal during the 24-h period ending at 0800 1st June.
6/6/2018 6/07/2018 8:00 AM 2 T M M Yesterday morning (June 6th) at 8 AM I did submit a report of a trace amount recorded by the CoCoRaHS gauge but somehow it did not get to the data base. With no further precipitation in the last 24 hours, I am reporting that trace amount today, June 7th, as a two-day observation. My wedge gauge though did clearly show an amount of 0.01" yesterday morning
7/8/2018 7/09/2018 8:00 AM 2 0.00 M M
9/8/2018 9/09/2018 8:00 AM 2 0.00 M M
9/30/2018 10/01/2018 8:00 AM 2 0.10 M M 0.10 also on the wedge gauge



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