Station Overview Station Location
Station Number NY-MR-21 Latitude 43.03498
Station Name Pittsford 4.0 SSE Longitude -77.49449
County Monroe Elevation (ft) 557



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 2.92 7.19 31 7.19 31 0.00 0 0 13 2 0.0 0 0
Nov 17 2.82 4.05 28 4.05 28 0.00 0 0 16 2 1.4 3 2
Dec 17 2.48 2.02 27 2.02 27 0.00 0 0 14 7 21.9 14 19
Jan 18 2.20 2.55 26 2.55 26 0.00 0 0 15 3 17.9 12 20
Feb 18 1.76 1.72 23 1.72 23 0.00 0 0 12 6 13.3 11 15
March 18 2.44 2.95 17 1.83 14 1.12 3 1 8 1 9.1 4 11
April 18 2.75 1.05 12 1.05 12 0.00 0 0 9 0 2.3 3 3
May 18 2.79 2.11 18 2.11 18 0.00 0 0 10 0 0.0 0 0
June 18 3.19 0.57 7 0.57 7 0.00 0 0 5 0 0.0 0 0
July 18 3.40 3.59 11 3.59 11 0.00 0 0 8 0 0.0 0 0
Aug 18 3.13 4.86 22 4.86 22 0.00 0 0 10 2 0.0 0 0
Sept 18 3.33 1.38 7 1.38 7 0.00 0 0 6 1 0.0 0 0
Water Year Totals: 33.21" 34.04" 229 days 32.92" 226 1.12" 3 days 1 126 days 24 days 65.9" 47 days 70 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 0.00
10/2/2017 0.00
10/3/2017 0.00
10/4/2017 0.00
10/5/2017 0.61
10/6/2017 0.11
10/7/2017 0.09
10/8/2017 0.29
10/9/2017 0.90
10/10/2017 1.18
10/11/2017 T
10/12/2017 0.47
10/13/2017 0.02
10/14/2017 0.00
10/15/2017 0.00
10/16/2017 0.29
10/17/2017 T
10/18/2017 0.00
10/19/2017 0.00
10/20/2017 0.00
10/21/2017 0.00
10/22/2017 0.00
10/23/2017 0.00
10/24/2017 0.41
10/25/2017 0.00
10/26/2017 0.00
10/27/2017 0.00
10/28/2017 0.00
10/29/2017 0.54
10/30/2017 2.15
10/31/2017 0.13
11/1/2017 0.03
11/2/2017 0.34
11/3/2017 0.45
11/4/2017 0.00
11/5/2017 0.51
11/6/2017 1.40
11/7/2017 T
11/8/2017 0.00
11/9/2017 0.00
11/10/2017 0.25
11/11/2017 0.00
11/12/2017 0.00
11/13/2017 0.13
11/14/2017 0.09
11/15/2017 0.02
11/16/2017 0.01
11/17/2017 0.06
11/18/2017 T
11/19/2017 0.49
11/20/2017 0.06
11/21/2017 0.00
11/22/2017 0.16
11/23/2017
11/24/2017
11/25/2017 0.01
11/26/2017 0.04
11/27/2017 0.00
11/28/2017 0.00
11/29/2017 0.00
11/30/2017 0.00
12/1/2017 0.08
12/2/2017 0.00
12/3/2017
12/4/2017
12/5/2017
12/6/2017
12/7/2017 T
12/8/2017 0.01
12/9/2017 0.00
12/10/2017 T
12/11/2017 0.13
12/12/2017 0.33
12/13/2017 0.04
12/14/2017 0.08
12/15/2017 T
12/16/2017 0.00
12/17/2017 0.04
12/18/2017 T
12/19/2017 0.05
12/20/2017 T
12/21/2017 T
12/22/2017 0.14
12/23/2017 0.08
12/24/2017 0.45
12/25/2017 0.40
12/26/2017 0.00
12/27/2017 0.00
12/28/2017 T
12/29/2017 0.01
12/30/2017 0.00
12/31/2017 0.18
Day of YearDaily PrcpMultiday Prcp
1/1/2018 0.02
1/2/2018
1/3/2018
1/4/2018
1/5/2018
1/6/2018 0.01
1/7/2018 T
1/8/2018 0.01
1/9/2018 0.01
1/10/2018 T
1/11/2018 0.00
1/12/2018 0.73
1/13/2018 1.14
1/14/2018 0.01
1/15/2018 0.00
1/16/2018 0.07
1/17/2018 0.03
1/18/2018 0.00
1/19/2018 T
1/20/2018 0.00
1/21/2018 0.00
1/22/2018 0.01
1/23/2018 0.15
1/24/2018 0.09
1/25/2018
1/26/2018 0.00
1/27/2018 0.00
1/28/2018 0.10
1/29/2018 0.00
1/30/2018 0.12
1/31/2018 0.05
2/1/2018 0.07
2/2/2018 T
2/3/2018 T
2/4/2018 T
2/5/2018 T
2/6/2018 0.05
2/7/2018 0.03
2/8/2018 0.23
2/9/2018 0.00
2/10/2018 0.27
2/11/2018 0.15
2/12/2018 T
2/13/2018 T
2/14/2018
2/15/2018
2/16/2018 0.11
2/17/2018 0.00
2/18/2018 0.06
2/19/2018
2/20/2018 0.36
2/21/2018
2/22/2018
2/23/2018 0.11
2/24/2018 0.03
2/25/2018 0.25
2/26/2018 0.00
2/27/2018 0.00
2/28/2018 0.00
3/1/2018 0.06
3/2/2018 **
3/3/2018 **
3/4/2018 1.12
3/5/2018
3/6/2018
3/7/2018
3/8/2018
3/9/2018 0.02
3/10/2018
3/11/2018
3/12/2018 0.00
3/13/2018 T
3/14/2018 0.45
3/15/2018 0.18
3/16/2018 0.12
3/17/2018
3/18/2018
3/19/2018
3/20/2018
3/21/2018
3/22/2018
3/23/2018
3/24/2018 0.00
3/25/2018 0.00
3/26/2018 0.00
3/27/2018 0.00
3/28/2018 0.34
3/29/2018
3/30/2018 0.64
3/31/2018 0.02
Day of YearDaily PrcpMultiday Prcp
4/1/2018 0.16
4/2/2018 0.00
4/3/2018 0.00
4/4/2018 0.46
4/5/2018 0.03
4/6/2018 0.07
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 0.05
4/21/2018 0.00
4/22/2018
4/23/2018
4/24/2018
4/25/2018
4/26/2018
4/27/2018 0.01
4/28/2018 0.06
4/29/2018 0.18
4/30/2018 0.03
5/1/2018 0.00
5/2/2018 0.00
5/3/2018 0.10
5/4/2018 0.32
5/5/2018 0.09
5/6/2018
5/7/2018
5/8/2018
5/9/2018
5/10/2018
5/11/2018 0.01
5/12/2018 0.03
5/13/2018
5/14/2018
5/15/2018
5/16/2018 0.24
5/17/2018 0.00
5/18/2018 0.00
5/19/2018 0.30
5/20/2018 0.19
5/21/2018 0.00
5/22/2018 0.45
5/23/2018 0.38
5/24/2018 0.00
5/25/2018 0.00
5/26/2018 0.00
5/27/2018
5/28/2018
5/29/2018
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
6/8/2018
6/9/2018
6/10/2018
6/11/2018
6/12/2018 0.00
6/13/2018 0.03
6/14/2018 0.13
6/15/2018
6/16/2018
6/17/2018
6/18/2018 0.14
6/19/2018 0.23
6/20/2018
6/21/2018
6/22/2018 0.00
6/23/2018 0.04
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
7/4/2018
7/5/2018
7/6/2018 0.92
7/7/2018
7/8/2018
7/9/2018 0.00
7/10/2018
7/11/2018
7/12/2018
7/13/2018
7/14/2018
7/15/2018
7/16/2018
7/17/2018 0.19
7/18/2018
7/19/2018
7/20/2018
7/21/2018
7/22/2018 0.67
7/23/2018
7/24/2018 1.06
7/25/2018 0.39
7/26/2018 0.23
7/27/2018 0.11
7/28/2018 0.00
7/29/2018 0.00
7/30/2018
7/31/2018 0.02
8/1/2018 0.00
8/2/2018 0.02
8/3/2018 0.00
8/4/2018 0.00
8/5/2018 0.00
8/6/2018
8/7/2018 0.70
8/8/2018 0.36
8/9/2018 0.63
8/10/2018 0.00
8/11/2018 0.00
8/12/2018 0.00
8/13/2018 T
8/14/2018 0.15
8/15/2018 2.20
8/16/2018
8/17/2018 0.17
8/18/2018 0.38
8/19/2018 T
8/20/2018
8/21/2018
8/22/2018 0.23
8/23/2018 0.02
8/24/2018 0.00
8/25/2018 0.00
8/26/2018 0.00
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
9/5/2018
9/6/2018
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 T
9/19/2018
9/20/2018
9/21/2018
9/22/2018 0.14
9/23/2018
9/24/2018
9/25/2018 0.42
9/26/2018 0.32
9/27/2018 0.48
9/28/2018 0.01
9/29/2018
9/30/2018 0.01



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
10/1/2017 8:00 AM 0.00 0.0 M 0.0 M
10/2/2017 8:00 AM 0.00 0.0 M 0.0 M
10/3/2017 8:00 AM 0.00 0.0 M 0.0 M
10/4/2017 8:00 AM 0.00 0.0 M 0.0 M
10/5/2017 7:00 AM 0.61 0.0 M 0.0 M
10/6/2017 10:00 AM 0.11 0.0 M 0.0 M
10/7/2017 9:30 AM 0.09 0.0 M 0.0 M
10/8/2017 8:00 AM 0.29 0.0 M 0.0 M
10/9/2017 8:00 AM 0.90 0.0 M 0.0 M
10/10/2017 7:40 AM 1.18 0.0 M 0.0 M Rain, heavy at times that tapered off early afternoon. At dusk, some light drizzle started. At morning obs, patchy low stratus/scud clouds, higher Ci and contrails visible. Temp at 62. Temp range 65/58. No wind noted.
10/11/2017 8:00 AM T 0.0 M 0.0 M
10/12/2017 8:00 AM 0.47 0.0 M 0.0 M
10/13/2017 7:00 AM 0.02 0.0 M 0.0 M
10/14/2017 8:00 AM 0.00 0.0 M 0.0 M
10/15/2017 8:00 AM 0.00 0.0 M 0.0 M
10/16/2017 8:00 AM 0.29 0.0 M 0.0 M Temp range 78/45. Mostly sunny skies accompanied by freshening S-SW winds at 15 to 25 knots. Temperatures soared with mixing and downsloping. Approach and arrival of strong cold front shortly after 17:00 resulted in sheets of heavy rain and wind gusts to 50 knots by 17:10. Power went out and not restored until 21:44. Following cold fropa, post frontal showers continued to past 19:00. Strong W/NW winds in progress till about 22:30, when those winds started to subside. At obs time, partly cloudy, light breeze and 45. Should be noted that 16,000 households were without power. Also, downed branches and many leaves present. Some areas had downed trees. Squall line along the cold front weakened as it crossed the state Sunday night.
10/17/2017 8:00 AM T 0.0 M 0.0 M
10/18/2017 8:00 AM 0.00 0.0 M 0.0 M
10/19/2017 8:00 AM 0.00 0.0 M 0.0 M
10/20/2017 8:00 AM 0.00 0.0 M 0.0 M
10/21/2017 8:00 AM 0.00 0.0 M 0.0 M
10/22/2017 8:00 AM 0.00 0.0 M 0.0 M
10/23/2017 8:00 AM 0.00 0.0 M 0.0 M
10/24/2017 8:00 AM 0.41 0.0 M 0.0 M
10/25/2017 8:00 AM 0.00 0.0 M 0.0 M
10/26/2017 8:00 AM 0.00 0.0 M 0.0 M
10/27/2017 8:00 AM 0.00 0.0 M 0.0 M
10/28/2017 8:00 AM 0.00 0.0 M 0.0 M
10/29/2017 8:00 AM 0.54 0.0 M 0.0 M
10/30/2017 8:00 AM 2.15 0.0 M 0.0 M
10/31/2017 8:00 AM 0.13 0.0 M 0.0 M
11/1/2017 8:00 AM 0.03 0.0 M 0.0 M
11/2/2017 7:15 AM 0.34 0.0 M 0.0 M
11/3/2017 7:00 AM 0.45 0.0 M 0.0 M
11/4/2017 8:00 AM 0.00 0.0 M 0.0 M
11/5/2017 8:00 AM 0.51 0.0 M 0.0 M
11/6/2017 7:30 AM 1.40 0.0 M 0.0 M
11/7/2017 8:00 AM T 0.0 M 0.0 M
11/8/2017 8:00 AM 0.00 0.0 M 0.0 M
11/9/2017 7:30 AM 0.00 0.0 M 0.0 M Temp range 47/27. Heavy frost again this overnight. At obs, clear to east and southeast. High cirrostratus deck from overhead, and thickening towards west/northwest horizon. This is the approaching Arctic cold front, expected raise mayhem tonight after evening rush hour.
11/10/2017 8:00 AM 0.25 1.2 M 1.0 M Temp range 49/21. Prefrontal trof (sic) and then, a strong cold front arrived Thursday night. Temps dropped from the low 40s at 20:00 to 32 by midnight and 21 for the min. At obs time, partly sunny and 22. Strong NW winds at times gusting to 25 knots. Changeover from rain to snow occurred at approx. 22:00.
11/11/2017 8:00 AM 0.00 0.0 M 0.5 M Temp range 27/20.
11/12/2017 8:00 AM 0.00 0.0 M 0.0 M
11/13/2017 8:00 AM 0.13 0.1 M T M
11/14/2017 8:00 AM 0.09 0.0 M 0.0 M
11/15/2017 8:00 AM 0.02 0.0 M 0.0 M Temp range 41/27. Hard freeze again, with frost on ground at obs time. High overcast starting to assemble, from the west. Tuesday featured low overcast, with ceilings thinning out and rising to higher heights later in day. Morning drizzle ended early afternoon. Strong subsidence inversion in place, thanks to low sun angle and "dirty" high pressure ridge overhead. As of obs time, sfc ridge to the east of our district.
11/16/2017 8:00 AM 0.01 0.0 M 0.0 M
11/17/2017 7:00 AM 0.06 0.0 M 0.0 M
11/18/2017 8:00 AM T 0.0 M 0.0 M
11/19/2017 8:00 AM 0.49 0.0 M 0.0 M
11/20/2017 8:00 AM 0.06 0.1 M T M
11/21/2017 8:00 AM 0.00 0.0 M 0.0 M
11/22/2017 7:00 AM 0.16 0.0 M 0.0 M Temp range 57/36. Mainly sunny and windy on 11/21. S to SE breezes with good mixing allowed for downsloping. Winds sustained 12knots gusts to 30knots. Increasing mid level clouds after sundown. Rain showers broke out after 23:15. At obs time, light drizzle and 36. A sugar coating of snow seen at elevation above 675 feet in nearby Perinton. Not seen at lower elevations, including here (elev 565 ft). Again, low overcast, spotty drizzle and 36 at obs time.
11/25/2017 8:00 AM 0.01 0.0 M 0.0 M Temp range 53/42. Brilliant orange & pink lit middle and high clouds at dusk and then again at dawn.
11/26/2017 8:00 AM 0.04 0.0 M 0.0 M
11/27/2017 8:00 AM 0.00 0.0 M 0.0 M
11/28/2017 8:00 AM 0.00 0.0 M 0.0 M
11/29/2017 8:00 AM 0.00 0.0 M 0.0 M Temp range: 65/45. At obs time, partly cloudy and 45.
11/30/2017 8:00 AM 0.00 0.0 M 0.0 M
12/1/2017 7:00 AM 0.08 0.0 M 0.0 M
12/2/2017 8:00 AM 0.00 0.0 M 0.0 M
12/7/2017 8:00 AM T T M 0.0 M
12/8/2017 7:00 AM 0.01 0.6 M 0.5 M
12/9/2017 8:00 AM 0.00 0.0 M T M
12/10/2017 8:00 AM T T M T M
12/11/2017 8:00 AM 0.13 2.5 M 2.5 M
12/12/2017 9:00 AM 0.33 4.3 M 5.5 M
12/13/2017 6:15 AM 0.04 0.8 M 5.5 M Temp range 32/12. At early obs time, light snow & 13.
12/14/2017 9:00 AM 0.08 1.6 M 6.5 M Temp range 19/13.
12/15/2017 7:00 AM T 0.1 M 4.5 M Temp range 18/07.
12/16/2017 8:00 AM 0.00 0.0 M 3.5 M
12/17/2017 8:00 AM 0.04 1.0 M 4.5 M Temp range 26/12. Snowfall data amended 12/18.
12/18/2017 7:00 AM T 0.0 M 3.5 M Temp range 26/22.
12/19/2017 7:00 AM 0.05 0.0 M 1.0 M Temp range 41/37. Periods of drizzle, especially late day and overnight. Warm front has pushed north; now in the dirty warm sector. Light S breezes to near calm. Snowpack now quite ripe, but much diminished over previous days.
12/20/2017 9:00 AM T T M T M Temp range 48/32. Cold fropa late in day. At obs, overcast and 32.
12/21/2017 8:00 AM T T M 0.0 M Temp range 32/26. Brief morning sunshine after 8am, but remainder of day featured solid mid level deck. Temps remained in low 30s to near 30, with light N to NW breeze. Overnight, brief flurries around 21:00, and partial clearing towards dawn. Ground is bare. Canal frozen over along with small ponds and manmade ice-hockey rings.
12/22/2017 6:35 AM 0.14 1.7 M 2.0 M Temp range 31/25. At obs time, light freezing drizzle and 26.
12/23/2017 8:00 AM 0.08 1.0 M M M
12/24/2017 8:00 AM 0.45 2.6 M 5.0 M Prolonged period of light sleet, light freezing ran & drizzle, which followed period of snow.
12/25/2017 8:00 AM 0.40 2.0 M 6.0 M
12/26/2017 8:00 AM 0.00 0.0 M 4.5 M
12/27/2017 8:00 AM 0.00 0.0 M 3.0 M
12/28/2017 8:00 AM T 0.2 M 3.5 M Temp range 16/01.
12/29/2017 8:00 AM 0.01 0.5 M 4.0 M Temp range 11/06. At obs, mostly cloudy with very light snow (S--)and 10 degrees.
12/30/2017 9:00 AM 0.00 0.0 M 4.5 M Temp range 17/13.
12/31/2017 8:00 AM 0.18 3.0 M 6.5 M Temp range 20/01.
1/1/2018 8:00 AM 0.02 0.6 M 7.0 M Temp range 08/B05.
1/6/2018 9:00 AM 0.01 0.2 M 5.0 M Temp range: 04/B2.5 B=below zero F.
1/7/2018 9:00 AM T 0.3 M 7.0 M Temp range +3.5/B06.
1/8/2018 10:00 AM 0.01 T M 6.0 M Temp range...rising temps from 09:00 yesterday through 10:00am today, 8 degrees to 36.
1/9/2018 10:00 AM 0.01 0.1 M 3.0 M Temp range 38/31.
1/10/2018 8:00 AM T T M 2.5 M Temp range 37/19.
1/11/2018 9:00 AM 0.00 0.0 M 1.5 M
1/12/2018 10:00 AM 0.73 0.0 M 0.0 M Temp range 61/56.
1/13/2018 9:00 AM 1.14 11.0 M 11.0 M Meltdown and earlier rain is amended. Temp range 60/14.
1/14/2018 9:00 AM 0.01 0.5 M 10.0 M Temp range 13/B06.
1/15/2018 8:00 AM 0.00 0.0 M 9.5 M Temp range 17/B04.
1/16/2018 9:00 AM 0.07 1.2 M 9.0 M Temp range: 21/M
1/17/2018 9:00 AM 0.03 0.7 M 9.0 M Temp range 30/10.
1/18/2018 9:00 AM 0.00 0.0 M 8.0 M Temp range 21/07.
1/19/2018 9:00 AM T 0.1 M 7.0 M Temp range 23/M.
1/20/2018 9:00 AM 0.00 0.0 M 6.5 M Temp range 37/18.
1/21/2018 9:00 AM 0.00 0.0 M 6.0 M Temp range 43/24.
1/22/2018 9:00 AM 0.01 0.0 M 3.0 M
1/23/2018 9:00 AM 0.15 0.0 M 1.0 M
1/24/2018 9:00 AM 0.09 0.2 M T M Temp range 46/20. Amended precip on F 1/26 as there was liquid precip that changed to light snow by end of period.
1/26/2018 8:00 AM 0.00 0.0 M T M
1/27/2018 9:00 AM 0.00 0.0 M T M Temp range 46/32.
1/28/2018 8:00 AM 0.10 0.0 M T M
1/29/2018 9:00 AM 0.00 0.0 M 0.0 M Temp range 46/29.
1/30/2018 6:50 AM 0.12 1.8 M 2.0 M Temp range 36/20. Light snow developed by about 20:00 at night. Light to moderate snow in progress when early obs was taken. Storm still in progress.
1/31/2018 7:00 AM 0.05 1.2 M 3.0 M Temp range 25/7. Snow ended by 14:30 and partial sunshine returned, along with a brisk, bitterly cold wind. Temps by 17:00 had fallen to 16. By midnight, 12 deg and near calm conditions with full moon visible.
2/1/2018 9:00 AM 0.07 1.3 M 2.0 M Temp range: rising temps all day to 40 by 09:00 2/1. Burst of moderate-heavy snow commenced at 11:45 and ended by 13:30. Warm front and dynamics aloft. Temps during the snow dropped from 23 to 20. After the snow, temps rose to above freezing by 19:00 and to 38 at 21:00 into midnight. Morning obs has us cloudy and 39.
2/2/2018 9:00 AM T 0.3 M 2.0 M Temp range 47/14. After a mild Thursday 2/1 with a one day thaw, and snow melt...Arctic front crossed district about 18:30 Thursday, heralded by wind shift and increase in wind speeds. Temp went from 47 at 15:00/32 at 19:00, and 22 by midnight. Minimum of 14 at 09:00 Friday. Snowsquall arrived around 08:00, areas north of station, specifically at NY31, north and east, saw visibilities drop to 1/4 mile with a quick 1-2" of snow. At this station, only .3".
2/3/2018 9:00 AM T 0.1 M 2.0 M Temp range 14/11.
2/4/2018 9:00 AM T 0.0 M 1.5 M Temp range 36/17. Daytime Sat 2/3 max was 26. Temps rose to above freezing by 23:20, reaching 36 at 09:00 obs.
2/5/2018 8:00 AM T 0.1 M 0.2 M Temp range: 40/13.
2/6/2018 9:00 AM 0.05 1.1 M 3.0 M Temp range 22/13.
2/7/2018 9:00 AM 0.03 0.4 M 3.0 M Temp range 26/11. At obs time, 22 deg with light snow falling.
2/8/2018 9:00 AM 0.23 3.0 M 5.0 M Temp range 27/16.
2/9/2018 9:00 AM 0.00 0.0 M 4.0 M
2/10/2018 9:00 AM 0.27 3.0 M 7.0 M Latest round in never-ending snows commenced after 10am on Fri.2/9. That round ended by 19:00 with 1.5"...overnight, another light snow developed, with another 1.5"...temps slowly rising to near 30 by 09:00. At obs, low overcast and 30.
2/11/2018 9:00 AM 0.15 1.2 M 7.0 M Temp range 32/26. Freezing rain and ice pellets broke out around 13:30. Later in day, it changed over to light snow, as a wind shift to the N/NW and colder air seeped in. Snow shut down before 22:00, with low overcast the remainder of the night.
2/12/2018 9:00 AM T T M 6.0 M Temp range 47/26. Sudden warmth Sunday afternoon, with the max temp occurring around 17:10. At that time, dark clouds to NW rolled in, along with a wind shift as the colder air returned. Brief foray into the warm sector allowed temps to climb into the low and mid 50s near and south of I-90. Temps went sub-freezing near midnight.
2/13/2018 9:00 AM T T M 5.5 M Temp range: 29/16. Lake effect snowsquall in the early afternoon. Came and went in 20 minutes. No accumulation, though visibilities did get below 3 miles, briefly.
2/16/2018 9:00 AM 0.11 0.0 M T M Temp range 58/37. Mix of sun and clouds Thursday as temps soared to their highest levels since Jan. 12th. Later in day, cloud cover became entrenched, with light rain and drizzle developing, and continued overnight. Temps slowly fell during the night, with 37 at 9am obs time. Morning drizzle in progress at obs cutoff time.
2/17/2018 9:00 AM 0.00 0.0 M 0.0 M Temp range 36/18. Friday morning clouds gave way to sharp clearing from the NNW during the early afternoon, with abundant sunshine after 13:45. Overnight, mainly clear allowed for strong radiational cooling, with temps bottoming to 18. At obs time, increasing high cirroform overcast moving, covering the sky.
2/18/2018 9:15 AM 0.06 1.7 M 1.5 M Temp range 34/27.
2/20/2018 8:15 AM 0.36 0.0 M 0.0 M Temp range:49/43.
2/23/2018 9:00 AM 0.11 1.1 M 0.5 M
2/24/2018 6:30 AM 0.03 0.0 M 0.0 M Temp range 50/39. At early obs, low overcast & 39. Temp dropped quickly after 5am from 43 to 39 with a gentle wind shift to NW.
2/25/2018 8:00 AM 0.25 0.0 M 0.0 M
2/26/2018 8:00 AM 0.00 0.0 M 0.0 M
2/27/2018 8:00 AM 0.00 0.0 M 0.0 M
2/28/2018 8:00 AM 0.00 0.0 M 0.0 M
3/1/2018 8:00 AM 0.06 0.0 M 0.0 M Temp range 64/38.
3/9/2018 8:00 AM 0.02 0.4 M 6.0 M
3/12/2018 7:00 AM 0.00 0.0 M 5.0 M Temp range 35/21.
3/13/2018 7:00 AM T T M 5.5 M
3/14/2018 8:00 AM 0.45 5.5 M 9.0 M
3/15/2018 9:00 AM 0.18 1.5 M 10.0 M
3/16/2018 9:00 AM 0.12 1.7 M 10.5 M Finally, a nicer day than most, and perhaps the best day of this week. Plenty of sun, with increasing Cu and high clouds after 15:30. Light breezes as temps pushed towards a max of 40. Then, another shot of colder air arrived by dinner hour...snowsqualls. By morning, nearly 2" of fresh, powdery snow, drifting snow due to gusty WNW winds. Min temp of 21 at obs time. Partly sunny at obs time. Snow depth remains deep.
3/24/2018 8:00 AM 0.00 0.0 M 4.0 M
3/25/2018 8:00 AM 0.00 0.0 M 4.0 M
3/26/2018 8:00 AM 0.00 0.0 M 4.0 M
3/27/2018 8:00 AM 0.00 0.0 M 3.0 M
3/28/2018 8:00 AM 0.34 0.0 M 2.0 M
3/30/2018 8:00 AM 0.64 0.0 M 0.0 M
3/31/2018 8:00 AM 0.02 0.0 M 0.0 M
4/1/2018 8:00 AM 0.16 0.0 M 0.0 M
4/2/2018 8:00 AM 0.00 0.0 M 0.0 M
4/3/2018 9:00 AM 0.00 0.0 M 0.0 M
4/4/2018 6:00 AM 0.46 0.0 M 0.0 M Temp range 54/41. Max temp occurring at actual early obs time of 6am.
4/5/2018 9:00 AM 0.03 0.2 M 0.2 M Gale force to storm force winds raked western NY on Wednesday 4/4 well into the night time hours. Clocked wind gusts to 55 knots, especially in the midday and afternoon hours. Scattered power outages, some of which linger into today. Tree branches everywhere. Some trees, big ones, uprooted and blown down. Day started mild, with mid to upper 50s. By 20:00, Standard Time, temps near 30. Wind chills into the teens and 20s. At obs time, snowshowers and 27.
4/6/2018 10:00 AM 0.07 1.2 M 1.0 M
4/20/2018 8:30 AM 0.05 0.9 M 1.0 M Abnormally cold air in place. The core of the coldest air passed over the western/central NY district during the afternoon and night-time hours. 850mb temps dropped to -9c in the afternoon, and then -11c at night. Maximum temps at ground level was 38. Sleet showers observed in the afternoon, but the fresh coating of nearly 1 inch of snow fell between 21:20 and 22:10. Temp range 38/29.
4/21/2018 9:30 AM 0.00 0.0 M 0.0 M Temp range 45/30. Overcast skies Friday morning gave way to sct to bkn Cu in the afternoon with finally, some real blue skies visible...after a week of gray skies and unsettled and cold weather. Still chilly, but the best weekday of the week, by far. At Sat morning obs, sunny skies, high Ci off to the S and near 40.
4/27/2018 8:00 AM 0.01 0.0 M 0.0 M
4/28/2018 8:00 AM 0.06 0.0 M 0.0 M
4/29/2018 8:00 AM 0.18 0.0 M 0.0 M A cold period with overnight rains mixing with snow predawn and into obs time.
4/30/2018 8:00 AM 0.03 0.0 M 0.0 M
5/1/2018 8:00 AM 0.00 0.0 M 0.0 M
5/2/2018 8:00 AM 0.00 0.0 M 0.0 M
5/3/2018 9:00 AM 0.10 0.0 M 0.0 M
5/4/2018 8:30 AM 0.32 0.0 M 0.0 M Temp range: 75/56. Showers arrived shortly after 03:00 LDT (EDT). Another heavier round arrived just after 6am. At obs time, overcast, damp and cool...ENE breeze, 59.
5/5/2018 8:00 AM 0.09 0.0 M 0.0 M Temp range 83/48. Area placed by NSSFC under a severe T-Storm Watch commencing mid afternoon. Strengthening WSW winds and rapid increase in dewpoints...along with a destabilizing atmosphere...allowed for a developing line of intense thunderstorms. Following cool fropa, winds increased to gale force with gusts to 45-50 knots, finally settling down after 21:30. At morning obs, CAVU and 56.
5/11/2018 8:00 AM 0.01 0.0 M 0.0 M
5/12/2018 8:00 AM 0.03 0.0 M 0.0 M
5/16/2018 7:00 AM 0.24 0.0 M 0.0 M
5/17/2018 6:30 AM 0.00 0.0 M 0.0 M
5/18/2018 8:00 AM 0.00 0.0 M 0.0 M
5/19/2018 9:35 AM 0.30 0.0 M 0.0 M
5/20/2018 9:00 AM 0.19 0.0 M 0.0 M
5/21/2018 8:00 AM 0.00 0.0 M 0.0 M
5/22/2018 9:00 AM 0.45 0.0 M 0.0 M
5/23/2018 8:00 AM 0.38 0.0 M 0.0 M
5/24/2018 8:00 AM 0.00 0.0 M 0.0 M
5/25/2018 8:00 AM 0.00 0.0 M 0.0 M
5/26/2018 8:00 AM 0.00 0.0 M 0.0 M
6/12/2018 8:00 AM 0.00 0.0 M 0.0 M Temp range 72/50. Deep blue skies all day with a just a brief glimpse of high cirrus in the mid morning. Otherwise, CAVU and a refreshing ENE=NE breeze much of the day. Dewponts dropped to upper 30s by mid afternoon. Overnight, clear skies and with decoupling, calm air...temps dropped to upper 40s-50. At obs, CAVU, with a SW wind and warm advection underway. 63 and sunny.
6/13/2018 6:45 AM 0.03 0.0 M 0.0 M Temp range 82/69. Sunny and dry wx yielded to increasing high clouds, sct Cu clouds and rising dewpoints by late afternoon, closing into the 60 deg range. Overnight, more clouds and humidity, with first showers arriving after 05:45am. At obs, light rain showers, and 69.
6/14/2018 7:00 AM 0.13 0.0 M 0.0 M Temp range 79/61.
6/18/2018 8:00 AM 0.14 0.0 M 0.0 M Temp range 89/72. Predawn shower. Otherwise, Sunday was hazy, hot and humid. Little, if any breeze noted. Air quality poor. Overnight, clear to p/c skies.
6/19/2018 6:30 AM 0.23 0.0 M 0.0 M
6/22/2018 8:00 AM 0.00 0.0 M 0.0 M Temp range 74/47. Spectacular day for Thursday followed by the coolest night for the month of June. Dry air still in place at obs time, but middle and high clouds block the morning sun with humidity on the increase.
6/23/2018 8:00 AM 0.04 0.0 M 0.0 M Temp range 75/63. First significant showers of the week arrived after 21:30 Friday night. It was less than predicted and didn't last long. At morning obs, low overcast, spotty drizzle and 65.
7/6/2018 6:30 AM 0.92 0.0 M 0.0 M
7/9/2018 6:30 AM 0.00 0.0 M 0.0 M CAVU conditions with little wind all day. Temp range 83mx/55mn.
7/17/2018 6:30 AM 0.19 0.0 M 0.0 M
7/22/2018 6:45 AM 0.67 0.0 M 0.0 M Much needed rain broke out Saturday night and ended by 6:15 am Sunday. Rainfall amounts fell short of projected computer guidance. Upper low along with a well defined band of near tropical moisture advected northwest bound from the SSE. Saturday up until the onset of rainfall was also unusually breezy, with SE winds, backing to NE winds this morning. At obs, overcast and 63.
7/24/2018 8:00 AM 1.06 0.0 M 0.0 M
7/25/2018 8:20 AM 0.39 0.0 M 0.0 M
7/26/2018 7:30 AM 0.23 0.0 M 0.0 M
7/27/2018 7:00 AM 0.11 0.0 0.00 0.0 0.00
7/28/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/29/2018 7:00 AM 0.00 0.0 0.00 0.0 0.00
7/31/2018 7:00 AM 0.02 0.0 M 0.0 M
8/1/2018 7:00 AM 0.00 0.0 M 0.0 M
8/2/2018 7:00 AM 0.02 0.0 M 0.0 M
8/3/2018 7:00 AM 0.00 0.0 M 0.0 M
8/4/2018 7:00 AM 0.00 0.0 M 0.0 M
8/5/2018 7:00 AM 0.00 0.0 M 0.0 M
8/7/2018 7:00 AM 0.70 0.0 M 0.0 M Steamy conditions Monday along with the slight risk of severe weather...culminated with a severe TS along with heavy rain, pea sized hail. Event struck just minutes before 3pm (!4:50) and ended by 3:15pm. Result? Leaf and small branches littered the streets, lawns and driveways. One home a few thousand feet away had 20 foot lead split off the main trunk. Suspected microburst came through, with estimated wind speeds at 40 to 50 knots. Overnight, clearing skies. But overcast conditions with middle and high clouds present at obs time and 71, dewpoint at 69. Max temp of 90, but airport, had a max of 94.
8/8/2018 8:00 AM 0.36 0.0 0.00 0.0 0.00
8/9/2018 8:00 AM 0.63 0.0 M 0.0 M
8/10/2018 8:00 AM 0.00 0.0 M 0.0 M
8/11/2018 8:00 AM 0.00 0.0 M 0.0 M
8/12/2018 8:00 AM 0.00 0.0 M 0.0 M
8/13/2018 7:00 AM T 0.0 M 0.0 M
8/14/2018 6:45 AM 0.15 0.0 M 0.0 M
8/15/2018 6:45 AM 2.20 0.0 M 0.0 M Total EVENT total was 2.35." Areas in Perinton & extreme NW Victor (extreme SE Monroe & extreme NW Ontario Counties), picked up 3.97 to 4.08" of rainfall. Those stations on a non-CoCoRahs network, using electronic rain-gauges. Event over between 14:45 and 15:00. Flooding in Powdermills Park, requiring closure of the two roads through there. Heaviest one day rainfall event for this year. Slow clearing late in day, and mainly clear overnight. At obs time, sunny and 65.
8/17/2018 7:00 AM 0.17 0.0 M 0.0 M
8/18/2018 9:00 AM 0.38 0.0 M 0.0 M
8/19/2018 7:00 AM T 0.0 M 0.0 M A trace was recorded after the 9am cutoff time previous day...Saturday. No measurable rainfall since before 9am Satuday 8/18. Low SC clouds mixed out to sct v bkn clouds in the afternoon. But a high cirroform overcast at 25000 feet mixed with smoke was observed late afternoon to sundown. Sun had a brass to copper appearance to it. This due to distant forest fires from Canada. Dewpoints lower than previous days. No longer in the low 70s, but now closer to 60.
8/22/2018 7:00 AM 0.23 0.0 M 0.0 M
8/23/2018 7:00 AM 0.02 0.0 M 0.0 M
8/24/2018 7:00 AM 0.00 0.0 M 0.0 M
8/25/2018 7:00 AM 0.00 0.0 M 0.0 M
8/26/2018 7:00 AM 0.00 0.0 M 0.0 M
9/18/2018 7:00 AM T 0.0 M 0.0 M This location, just a half mile from the Ontario County border...got grazed by the northern edge of the tropical depression (Florence). Very sharp cutoff. Light drizzle and a bit of very light rain, only a trace amount. Off the NW the sky was partly clear.
9/22/2018 8:00 AM 0.14 0.0 M 0.0 M Max temp in the upper 80s (90 ROC AP). Area under severe thunderstorm watch, while the northern half of Ontario County went under a tornado watch. Strong rear flanking downdraft observed in the last minutes of the rain event as sun was beginning to reappear at sunset time. Winds gusting to estimated 30 to 35 knots. At obs time, low stratiform overcast, NNE breeze, temp at 56.
9/25/2018 6:30 AM 0.42 0.0 M 0.0 M
9/26/2018 6:30 AM 0.32 0.0 M 0.0 M
9/27/2018 6:00 AM 0.48 0.0 M 0.0 M
9/28/2018 8:00 AM 0.01 0.0 M 0.0 M
9/30/2018 9:00 AM 0.01 0.0 M 0.0 M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
3/2/2018 3/04/2018 5:00 PM 3 1.12 12.0 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