Station Overview Station Location
Station Number NJ-MC-23 Latitude 40.3018413
Station Name Hopewell Twp 4.6 SW Longitude -74.8728855
County Mercer Elevation (ft) 60



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 19 3.89 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 19 3.68 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 19 4.09 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 20 3.51 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Feb 20 2.77 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
March 20 4.15 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
April 20 4.03 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
May 20 4.26 1.50 27 1.50 27 0.00 0 0 9 4 0.0 0 0
June 20 4.39 2.79 29 1.17 24 1.62 5 1 7 2 0.0 0 0
July 20 5.22 4.31 31 4.25 21 0.06 10 1 9 1 0.0 0 0
Aug 20 4.18 6.54 31 1.87 20 4.67 11 1 8 1 0.0 0 0
Sept 20 4.41 5.95 30 5.93 19 0.02 11 2 9 1 0.0 0 0
Water Year Totals: 48.58" 21.09" 148 days 14.72" 111 6.37" 37 days 5 42 days 9 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
10/1/2019
10/2/2019
10/3/2019
10/4/2019
10/5/2019
10/6/2019
10/7/2019
10/8/2019
10/9/2019
10/10/2019
10/11/2019
10/12/2019
10/13/2019
10/14/2019
10/15/2019
10/16/2019
10/17/2019
10/18/2019
10/19/2019
10/20/2019
10/21/2019
10/22/2019
10/23/2019
10/24/2019
10/25/2019
10/26/2019
10/27/2019
10/28/2019
10/29/2019
10/30/2019
10/31/2019
11/1/2019
11/2/2019
11/3/2019
11/4/2019
11/5/2019
11/6/2019
11/7/2019
11/8/2019
11/9/2019
11/10/2019
11/11/2019
11/12/2019
11/13/2019
11/14/2019
11/15/2019
11/16/2019
11/17/2019
11/18/2019
11/19/2019
11/20/2019
11/21/2019
11/22/2019
11/23/2019
11/24/2019
11/25/2019
11/26/2019
11/27/2019
11/28/2019
11/29/2019
11/30/2019
12/1/2019
12/2/2019
12/3/2019
12/4/2019
12/5/2019
12/6/2019
12/7/2019
12/8/2019
12/9/2019
12/10/2019
12/11/2019
12/12/2019
12/13/2019
12/14/2019
12/15/2019
12/16/2019
12/17/2019
12/18/2019
12/19/2019
12/20/2019
12/21/2019
12/22/2019
12/23/2019
12/24/2019
12/25/2019
12/26/2019
12/27/2019
12/28/2019
12/29/2019
12/30/2019
12/31/2019
Day of YearDaily PrcpMultiday Prcp
1/1/2020
1/2/2020
1/3/2020
1/4/2020
1/5/2020
1/6/2020
1/7/2020
1/8/2020
1/9/2020
1/10/2020
1/11/2020
1/12/2020
1/13/2020
1/14/2020
1/15/2020
1/16/2020
1/17/2020
1/18/2020
1/19/2020
1/20/2020
1/21/2020
1/22/2020
1/23/2020
1/24/2020
1/25/2020
1/26/2020
1/27/2020
1/28/2020
1/29/2020
1/30/2020
1/31/2020
2/1/2020
2/2/2020
2/3/2020
2/4/2020
2/5/2020
2/6/2020
2/7/2020
2/8/2020
2/9/2020
2/10/2020
2/11/2020
2/12/2020
2/13/2020
2/14/2020
2/15/2020
2/16/2020
2/17/2020
2/18/2020
2/19/2020
2/20/2020
2/21/2020
2/22/2020
2/23/2020
2/24/2020
2/25/2020
2/26/2020
2/27/2020
2/28/2020
2/29/2020
3/1/2020
3/2/2020
3/3/2020
3/4/2020
3/5/2020
3/6/2020
3/7/2020
3/8/2020
3/9/2020
3/10/2020
3/11/2020
3/12/2020
3/13/2020
3/14/2020
3/15/2020
3/16/2020
3/17/2020
3/18/2020
3/19/2020
3/20/2020
3/21/2020
3/22/2020
3/23/2020
3/24/2020
3/25/2020
3/26/2020
3/27/2020
3/28/2020
3/29/2020
3/30/2020
3/31/2020
Day of YearDaily PrcpMultiday Prcp
4/1/2020
4/2/2020
4/3/2020
4/4/2020
4/5/2020
4/6/2020
4/7/2020
4/8/2020
4/9/2020
4/10/2020
4/11/2020
4/12/2020
4/13/2020
4/14/2020
4/15/2020
4/16/2020
4/17/2020
4/18/2020
4/19/2020
4/20/2020
4/21/2020
4/22/2020
4/23/2020
4/24/2020
4/25/2020
4/26/2020
4/27/2020
4/28/2020
4/29/2020
4/30/2020
5/1/2020 0.61
5/2/2020 0.01
5/3/2020 M
5/4/2020 0.00
5/5/2020 0.00
5/6/2020 0.00
5/7/2020
5/8/2020 0.00
5/9/2020 M
5/10/2020 M
5/11/2020 0.06
5/12/2020 0.02
5/13/2020 0.00
5/14/2020 0.00
5/15/2020 0.00
5/16/2020 T
5/17/2020 0.00
5/18/2020 T
5/19/2020 0.00
5/20/2020 0.00
5/21/2020 0.00
5/22/2020 0.00
5/23/2020 0.37
5/24/2020 0.02
5/25/2020 T
5/26/2020 T
5/27/2020 0.00
5/28/2020 0.01
5/29/2020 0.01
5/30/2020 0.39
5/31/2020 0.00
6/1/2020 0.00
6/2/2020 0.00
6/3/2020 T
6/4/2020 M
6/5/2020 0.52
6/6/2020 0.19
6/7/2020 0.00
6/8/2020 0.00
6/9/2020 0.00
6/10/2020 0.00
6/11/2020 0.09
6/12/2020 0.08
6/13/2020 0.00
6/14/2020 0.00
6/15/2020 0.00
6/16/2020 0.00
6/17/2020 0.00
6/18/2020 0.08
6/19/2020 **
6/20/2020 **
6/21/2020 **
6/22/2020 **
6/23/2020 1.62
6/24/2020 0.00
6/25/2020 0.00
6/26/2020 0.00
6/27/2020 0.01
6/28/2020 0.20
6/29/2020 T
6/30/2020 0.00
Day of YearDaily PrcpMultiday Prcp
7/1/2020 0.01
7/2/2020 0.04
7/3/2020 0.00
7/4/2020 0.39
7/5/2020 **
7/6/2020 **
7/7/2020 **
7/8/2020 **
7/9/2020 0.06
7/10/2020 0.00
7/11/2020 2.12
7/12/2020 T
7/13/2020 0.40
7/14/2020 0.00
7/15/2020 0.00
7/16/2020 0.00
7/17/2020 0.00
7/18/2020 0.00
7/19/2020 0.00
7/20/2020 0.00
7/21/2020 0.00
7/22/2020 0.14
7/23/2020 0.20
7/24/2020 0.80
7/25/2020 0.15
7/26/2020 0.00
7/27/2020 **
7/28/2020 **
7/29/2020 **
7/30/2020 **
7/31/2020 **
8/1/2020 **
8/2/2020 **
8/3/2020 **
8/4/2020 **
8/5/2020 **
8/6/2020 **
8/7/2020 **
8/8/2020 **
8/9/2020 4.67
8/10/2020 0.00
8/11/2020 0.00
8/12/2020 0.02
8/13/2020 1.01
8/14/2020 0.01
8/15/2020 0.00
8/16/2020 0.23
8/17/2020 0.12
8/18/2020 0.03
8/19/2020 0.44
8/20/2020 0.01
8/21/2020 0.00
8/22/2020 0.00
8/23/2020 0.00
8/24/2020 T
8/25/2020 0.00
8/26/2020 0.00
8/27/2020 0.00
8/28/2020 0.00
8/29/2020 0.00
8/30/2020 **
8/31/2020 **
9/1/2020 0.02
9/2/2020 0.01
9/3/2020 0.02
9/4/2020 2.05
9/5/2020 0.00
9/6/2020 0.00
9/7/2020 0.00
9/8/2020 0.00
9/9/2020 0.00
9/10/2020 0.63
9/11/2020 0.87
9/12/2020 **
9/13/2020 **
9/14/2020 **
9/15/2020 **
9/16/2020 **
9/17/2020 **
9/18/2020 **
9/19/2020 **
9/20/2020 **
9/21/2020 T
9/22/2020 0.00
9/23/2020 0.00
9/24/2020 0.00
9/25/2020 0.00
9/26/2020 0.02
9/27/2020 T
9/28/2020 0.05
9/29/2020 0.01
9/30/2020 2.27



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
5/1/2020 9:00 AM 0.61 M M M M
5/2/2020 9:00 AM 0.01 M M M M
5/3/2020 9:00 AM M 0.0 M M M (MG note: set 0.00" precip to "NA", as widespread light precip occurred. OST 5/03/2020 11:31 PM)
5/4/2020 9:00 AM 0.00 0.0 M M M
5/5/2020 9:00 AM 0.00 0.0 M M M
5/6/2020 9:00 AM 0.00 0.0 M M M
5/8/2020 9:00 AM 0.00 0.0 M M M
5/9/2020 9:00 AM M M M M M Didn't observe frost on the ground but had a little ice on plastic-board decking of a covered porch. Knocked over gauge before I read it. Had 0.39 but not sure if some spilled.
5/10/2020 8:00 AM M M M M M Nothing in the gauge, my recollection was we got zero but I can't be sure we didn't get a T
5/11/2020 8:58 AM 0.06 M M M M Light rain had almost, but not quite, ended by time of measurement.
5/12/2020 9:00 AM 0.02 M M M M Actually 0.015. On 5/11 received a T immediately after meas. at 09:00. About 15:45 a thunderstorm went through northwest of here, we only received a trace whereas a friend working just a few miles NW got more from that storm.
5/13/2020 9:00 AM 0.00 0.0 M M M
5/14/2020 9:00 AM 0.00 0.0 M M M
5/15/2020 9:00 AM 0.00 0.0 M M M Might have been a T of precip around 8 pm, I was on the road ~5-8 miles away and got a few drops.
5/16/2020 9:00 AM T M M M M I estimate less than 10 seconds of precip--I felt a few drops while outside, very few drops, very short. later in evening, ~20:00? Nothing fell during earlier wave that went through at ~18:00. I was outside that entire time (putting down grass seed, hoping for rain).
5/17/2020 8:00 AM 0.00 0.0 M M M
5/18/2020 9:00 AM T M M M M A very brief shower started 18:19, over ~18:23. Not enough to show even moisture in rain gauge
5/19/2020 9:00 AM 0.00 0.0 M M M
5/20/2020 9:00 AM 0.00 0.0 M M M
5/21/2020 9:00 AM 0.00 0.0 M M M
5/22/2020 9:00 AM 0.00 0.0 M M M
5/23/2020 9:55 AM 0.37 M M M M Fairly heavy rain in the morning, had stopped by the time of my measurement at 9:55 am
5/24/2020 7:20 AM 0.02 M M M M
5/25/2020 8:30 AM T M M M M A T in the gauge, wet on a stair where porch roof drips. Nothing on windshields, no other evidence of precip, but water on stair seemed conclusive, so I concluded a T fell overnight.
5/26/2020 9:00 AM T M M M M A tough call. Left the house at 6:30, could feel drizzle on my face, needed the windshield wipers a few times. I would say too 'thick' to count as fog or dew.
5/27/2020 9:00 AM 0.00 0.0 M M M I really don't know. Wet on the step where the metal porch roof drips and on a few, but not all, windshields. Felt a few drops of drizzle walking out to curb to get empty trashcan at 8:45, trash can was dry inside. I conclude not a Trace, just fog and dew.
5/28/2020 9:15 AM 0.01 M M M M I'm confident about this one--4th out 5 mornings with a possible T of precip, the other three I was less sure.
5/29/2020 9:20 AM 0.01 M M M M occasional periods of very light rain or drizzle, only added up to 0.01".
5/30/2020 8:00 AM 0.39 M M M M
5/31/2020 9:00 AM 0.00 0.0 M M M
6/1/2020 9:00 AM 0.00 0.0 M M M
6/2/2020 9:00 AM 0.00 0.0 M M M gray skies but no precip overnight
6/3/2020 9:00 AM T M M M M 2-3 minutes of hardly raining at ~11:30 (literally about 5-10 drops of rain per square foot) A few minutes of hardly raining at ~23:30. I wouldn't have known about either if I hadn't happened to be outside at those times, no T in gauge this morning.
6/4/2020 9:00 AM M M M M M Gauge knocked over by the derecho, didn't get a valid measurement. Pouring rain during first wave ~11 am, light rain in the evening.
6/5/2020 9:20 AM 0.52 M M M M All, or nearly all, after 23:00
6/6/2020 9:20 AM 0.19 M M M M
6/7/2020 9:00 AM 0.00 0.0 M M M
6/8/2020 9:00 AM 0.00 0.0 M M M
6/9/2020 8:00 AM 0.00 0.0 M M M
6/10/2020 9:00 AM 0.00 0.0 M M M
6/11/2020 9:05 AM 0.09 M M M M
6/12/2020 8:00 AM 0.08 M M M M precip fell in the late morning, after ~10, before ~1.
6/13/2020 9:00 AM 0.00 0.0 M M M
6/14/2020 9:00 AM 0.00 0.0 M M M
6/15/2020 9:00 AM 0.00 0.0 M M M
6/16/2020 9:00 AM 0.00 0.0 M M M
6/17/2020 8:00 AM 0.00 0.0 M M M
6/18/2020 9:49 AM 0.08 M M M M Light rain falling at the time of reading.
6/24/2020 9:00 AM 0.00 0.0 M M M
6/25/2020 9:00 AM 0.00 0.0 M M M
6/26/2020 9:00 AM 0.00 0.0 M M M
6/27/2020 8:00 AM 0.01 M M M M a 0.01 trace fell overnight.
6/28/2020 9:00 AM 0.20 M M M M a few drops of rain fell in earlier wave sometime between noon and one. Thunderstorms mostly north of us at ~4 pm, then sun, then third wave of storms mostly south of us at ~5:30.
6/29/2020 9:00 AM T M M M M
6/30/2020 9:00 AM 0.00 0.0 M M M
7/1/2020 9:00 AM 0.01 M M M M Brief shower ~13:30 (+- 20 min, I was on phone 13:00-14:00
7/2/2020 9:00 AM 0.04 M M M M
7/3/2020 8:00 AM 0.00 0.0 M M M
7/4/2020 8:00 AM 0.39 M M M M
7/10/2020 9:00 AM 0.00 0.0 M M M measurement taken just before Tropical Storm Fay rain began at 9:05.
7/11/2020 9:00 AM 2.12 M M M M light rain began 9:02, first round of heavier at 10:01. Heavy again at 12:36, slowed ~13:35, heavy 14:19, slowed ~14:45, ~stopped 14:57. Light but steady started ~16:35, heavy at 17:19. ~hourly measurements below: Time Total Increment 9:01 0.00 12:29 0.40 0.40"/2.5 hrs 13:11 0.98 0.58"/0.67 hrs 14:11 1.27 0.29"/hr 15:11 1.60 0.33"/hr 16:11 1.61 0.01"/hr 17:11 1.65 0.04"/hr 18:11 2.03 0.38"/hr 19:15 2.06 0.03"/hr 20:15 2.10 0.04"/hr 00:15 2.12 0.02"/4 hrs 09:00 2.12 0.00"/9 hrs
7/12/2020 9:00 AM T M M M M brief shower went through at ~17:45, other showers nearby earlier but didn't hit here.
7/13/2020 9:00 AM 0.40 M M M M
7/14/2020 9:00 AM 0.00 0.0 M M M
7/15/2020 9:00 AM 0.00 0.0 M M M
7/16/2020 8:00 AM 0.00 0.0 M M M
7/17/2020 8:00 AM 0.00 0.0 M M M
7/18/2020 8:00 AM 0.00 0.0 M M M
7/19/2020 8:00 AM 0.00 0.0 M M M
7/20/2020 8:00 AM 0.00 0.0 M M M
7/21/2020 8:00 AM 0.00 0.0 M M M
7/22/2020 9:00 AM 0.14 M M M M Thunderstorm went through beginning 23:16, not sure when it ended (after midnight)
7/23/2020 9:06 AM 0.20 M M M M Probably ~99% of the 0.20 fell in the evening of 7/22. Started 17:55 (+- 5 minutes), ended 19:55 (+- 15 minutes. Precip 7/23 started 08:40 (+- 5 minutes), very light rain at time of measurement.
7/24/2020 12:55 AM 0.80 M M M M 0.10 the morning of 7/23 0.00 or T in pop-up storm nearby 18:30-19:00 ~0.70 in t-storm beginning after midnight on 7/24
7/25/2020 8:00 AM 0.15 M M M M
7/26/2020 8:00 AM 0.00 0.0 M M M
8/10/2020 9:00 AM 0.00 0.0 M M M
8/11/2020 9:00 AM 0.00 0.0 M M M
8/12/2020 8:30 AM 0.02 M M M M
8/13/2020 9:45 AM 1.01 M M M M Brief precip 14:30 - 14:48, vast majority of 1.01" fell overnight, probably between 04:00-09:00
8/14/2020 9:00 AM 0.01 M M M M 0.01" is from light rain around the time of yesterday's measurement?
8/15/2020 9:00 AM 0.00 0.0 M M M
8/16/2020 9:50 AM 0.23 M M M M Raining at the time of measurement
8/17/2020 9:00 AM 0.12 M M M M Raining at the time of yesterday's measurement, 9:45.
8/18/2020 9:30 AM 0.03 M M M M Maybe a drop or two in 17:00 hour, intermittent sprinkles from nearby T-storm 19:26 to 19:44, most of the 0.03 fell after 01:00. Lots of 'heat lightning' 00:00 to 01:00 (and later, I suppose) from T-storms that were, I think, to our north.
8/19/2020 9:25 AM 0.44 M M M M Still sprinkling at the time of measurement, precip occurred during early morning hours thru time of measurement.
8/20/2020 9:00 AM 0.01 M M M M light rain at the time of yesterday's measurement
8/21/2020 9:00 AM 0.00 0.0 M M M
8/22/2020 9:00 AM 0.00 0.0 M M M
8/23/2020 9:00 AM 0.00 0.0 M M M
8/24/2020 9:00 AM T 0.0 M M M Thunderstorms went by to the southeast in the afternoon, we got one t-storm outflow burst of wind for about 5-10 minutes, still no rain, then got 1 minute of very light rain around 15:30ish.
8/25/2020 9:00 AM 0.00 0.0 M M M
8/26/2020 9:00 AM 0.00 0.0 M M M t-storm watches for the region but nada here.
8/27/2020 9:00 AM 0.00 0.0 M M M
8/28/2020 9:00 AM 0.00 0.0 M M M Another near-miss--lots of lightning visible to the north 20:00-21:00, even heard thunder ~21:00, but not a drop of rain that I'm aware of. Gauge was bone dry!
8/29/2020 9:00 AM 0.00 0.0 M M M All of the 0.80" fell on 8/28 between 16:25 and ~17:15
9/2/2020 9:00 AM 0.01 M M M M A few drops during the day, most of the 0.01" fell overnight
9/3/2020 9:00 AM 0.02 M M M M A little rain in the late afternoon. Actually 0.015 but rounded up.
9/4/2020 9:00 AM 2.05 M M M M Rain missed us past several days, didn't miss us today--2 inches in about an hour or less. I was surprised by how little thunder and lightning for such an intense storm.
9/5/2020 9:00 AM 0.00 0.0 M M M
9/6/2020 9:00 AM 0.00 0.0 M M M
9/7/2020 9:00 AM 0.00 0.0 M M M
9/8/2020 9:00 AM 0.00 0.0 M M M
9/9/2020 9:00 AM 0.00 0.0 M M M
9/10/2020 9:10 AM 0.63 M M M M Rain started 00:46, heavier rain within a few minutes.
9/11/2020 9:00 AM 0.87 M M M M Although threatening all day, I'm not aware of any rain falling between checking gauge at 09:00 and when rain started in the evening at 18:43. If any rain fell during 09:00-18:43, it was a T.
9/22/2020 8:00 AM 0.00 0.0 M M M
9/23/2020 8:00 AM 0.00 0.0 M M M
9/24/2020 9:00 AM 0.00 0.0 M M M
9/25/2020 9:00 AM 0.00 0.0 M M M
9/26/2020 9:00 AM 0.02 M M M M
9/27/2020 9:00 AM T M M M M T several times during the day, 10:30 and later.
9/28/2020 9:00 AM 0.05 M M M M T fell in late afternoon (~17:00?) Overnight precip started very gradually ~01:00
9/29/2020 9:00 AM 0.01 M M M M
9/30/2020 9:00 AM 2.27 M M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
6/19/2020 6/23/2020 8:00 AM 5 1.62 M M Heavy rain in the evening of 6/22.
7/5/2020 7/09/2020 9:00 AM 5 0.06 M M
7/27/2020 8/09/2020 9:00 AM 14 4.67 M M Not sure that measurement is accurate--gauge was pushed slightly off vertical by heavy winds of tropical storm.
8/30/2020 9/01/2020 9:00 AM 3 0.02 M M Despite threat of rain on both days (and at least a T on both days) total was only 0.02"
9/12/2020 9/21/2020 8:00 AM 10 T M M Could have been more than T, perhaps some evaporated from gauge while I was away.



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