Station Overview Station Location
Station Number CA-NP-8 Latitude 38.169395
Station Name American Canyon 0.3 S Longitude -122.260479
County Napa Elevation (ft) 37



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 09 1.10 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Nov 09 2.74 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Dec 09 4.13 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Jan 10 4.50 0.90 7 0.90 7 0.00 0 0 4 0 0.0 0 0
Feb 10 4.24 2.01 9 1.29 3 0.72 6 1 2 0 0.0 0 0
March 10 2.96 2.42 28 2.42 28 0.00 0 0 11 0 0.0 0 0
April 10 1.37 3.93 27 3.93 27 0.00 0 0 14 2 0.0 0 0
May 10 0.67 1.26 16 1.26 16 0.00 0 0 5 0 0.0 0 0
June 10 0.12 0.00 2 0.00 2 0.00 0 0 0 0 0.0 0 0
July 10 0.01 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Aug 10 0.05 0.00 0 0.00 0 0.00 0 0 0 0 0.0 0 0
Sept 10 0.19 0.00 30 0.00 30 0.00 0 0 0 0 0.0 0 0
Water Year Totals: 22.08" 10.52" 119 days 9.80" 113 0.72" 6 days 1 36 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
10/1/2009
10/2/2009
10/3/2009
10/4/2009
10/5/2009
10/6/2009
10/7/2009
10/8/2009
10/9/2009
10/10/2009
10/11/2009
10/12/2009
10/13/2009
10/14/2009
10/15/2009
10/16/2009
10/17/2009
10/18/2009
10/19/2009
10/20/2009
10/21/2009
10/22/2009
10/23/2009
10/24/2009
10/25/2009
10/26/2009
10/27/2009
10/28/2009
10/29/2009
10/30/2009
10/31/2009
11/1/2009
11/2/2009
11/3/2009
11/4/2009
11/5/2009
11/6/2009
11/7/2009
11/8/2009
11/9/2009
11/10/2009
11/11/2009
11/12/2009
11/13/2009
11/14/2009
11/15/2009
11/16/2009
11/17/2009
11/18/2009
11/19/2009
11/20/2009
11/21/2009
11/22/2009
11/23/2009
11/24/2009
11/25/2009
11/26/2009
11/27/2009
11/28/2009
11/29/2009
11/30/2009
12/1/2009
12/2/2009
12/3/2009
12/4/2009
12/5/2009
12/6/2009
12/7/2009
12/8/2009
12/9/2009
12/10/2009
12/11/2009
12/12/2009
12/13/2009
12/14/2009
12/15/2009
12/16/2009
12/17/2009
12/18/2009
12/19/2009
12/20/2009
12/21/2009
12/22/2009
12/23/2009
12/24/2009
12/25/2009
12/26/2009
12/27/2009
12/28/2009
12/29/2009
12/30/2009
12/31/2009
Day of YearDaily PrcpMultiday Prcp
1/1/2010
1/2/2010
1/3/2010
1/4/2010 0.02
1/5/2010 0.37
1/6/2010 0.47
1/7/2010 0.04
1/8/2010 0.00
1/9/2010
1/10/2010
1/11/2010
1/12/2010
1/13/2010 0.00
1/14/2010 0.00
1/15/2010
1/16/2010
1/17/2010
1/18/2010
1/19/2010
1/20/2010
1/21/2010
1/22/2010
1/23/2010
1/24/2010
1/25/2010
1/26/2010
1/27/2010
1/28/2010
1/29/2010
1/30/2010
1/31/2010
2/1/2010
2/2/2010
2/3/2010
2/4/2010 0.00
2/5/2010
2/6/2010
2/7/2010
2/8/2010
2/9/2010
2/10/2010
2/11/2010
2/12/2010
2/13/2010
2/14/2010
2/15/2010
2/16/2010
2/17/2010
2/18/2010 **
2/19/2010 **
2/20/2010 **
2/21/2010 **
2/22/2010 **
2/23/2010 0.72 0.72
2/24/2010
2/25/2010
2/26/2010
2/27/2010
2/28/2010 0.57
3/1/2010
3/2/2010 0.49
3/3/2010 0.60
3/4/2010 0.33
3/5/2010 0.00
3/6/2010
3/7/2010 0.00
3/8/2010 0.00
3/9/2010 0.03
3/10/2010 0.13
3/11/2010 0.01
3/12/2010 0.00
3/13/2010 0.39
3/14/2010 0.00
3/15/2010 0.00
3/16/2010 0.00
3/17/2010 0.00
3/18/2010 0.00
3/19/2010 0.00
3/20/2010 0.00
3/21/2010 0.00
3/22/2010 0.00
3/23/2010 0.00
3/24/2010 0.00
3/25/2010 0.06
3/26/2010 0.06
3/27/2010 0.00
3/28/2010
3/29/2010 0.00
3/30/2010 0.02
3/31/2010 0.30
Day of YearDaily PrcpMultiday Prcp
4/1/2010 0.12
4/2/2010 0.02
4/3/2010 0.07
4/4/2010 T
4/5/2010 0.88
4/6/2010 0.05
4/7/2010 0.00
4/8/2010 0.00
4/9/2010
4/10/2010 0.00
4/11/2010 T
4/12/2010 1.81
4/13/2010 0.19
4/14/2010 0.00
4/15/2010 0.00
4/16/2010
4/17/2010
4/18/2010 0.00
4/19/2010 0.00
4/20/2010 0.30
4/21/2010 0.05
4/22/2010 0.08
4/23/2010 0.00
4/24/2010 0.00
4/25/2010 0.00
4/26/2010 0.00
4/27/2010 0.05
4/28/2010 0.07
4/29/2010 0.09
4/30/2010 0.15
5/1/2010 0.00
5/2/2010 0.00
5/3/2010 0.00
5/4/2010 0.00
5/5/2010 0.00
5/6/2010 0.00
5/7/2010 0.00
5/8/2010 0.00
5/9/2010 0.00
5/10/2010 0.20
5/11/2010 0.17
5/12/2010 0.00
5/13/2010 0.00
5/14/2010
5/15/2010
5/16/2010
5/17/2010
5/18/2010
5/19/2010
5/20/2010
5/21/2010 0.24
5/22/2010
5/23/2010
5/24/2010
5/25/2010
5/26/2010 0.18
5/27/2010
5/28/2010 0.47
5/29/2010
5/30/2010
5/31/2010
6/1/2010
6/2/2010
6/3/2010 0.00
6/4/2010
6/5/2010
6/6/2010
6/7/2010
6/8/2010 0.00
6/9/2010
6/10/2010
6/11/2010
6/12/2010
6/13/2010
6/14/2010
6/15/2010
6/16/2010
6/17/2010
6/18/2010
6/19/2010
6/20/2010
6/21/2010
6/22/2010
6/23/2010
6/24/2010
6/25/2010
6/26/2010
6/27/2010
6/28/2010
6/29/2010
6/30/2010
Day of YearDaily PrcpMultiday Prcp
7/1/2010
7/2/2010
7/3/2010
7/4/2010
7/5/2010
7/6/2010
7/7/2010
7/8/2010
7/9/2010
7/10/2010
7/11/2010
7/12/2010
7/13/2010
7/14/2010
7/15/2010
7/16/2010
7/17/2010
7/18/2010
7/19/2010
7/20/2010
7/21/2010
7/22/2010
7/23/2010
7/24/2010
7/25/2010
7/26/2010
7/27/2010
7/28/2010
7/29/2010
7/30/2010
7/31/2010
8/1/2010
8/2/2010
8/3/2010
8/4/2010
8/5/2010
8/6/2010
8/7/2010
8/8/2010
8/9/2010
8/10/2010
8/11/2010
8/12/2010
8/13/2010
8/14/2010
8/15/2010
8/16/2010
8/17/2010
8/18/2010
8/19/2010
8/20/2010
8/21/2010
8/22/2010
8/23/2010
8/24/2010
8/25/2010
8/26/2010
8/27/2010
8/28/2010
8/29/2010
8/30/2010
8/31/2010
9/1/2010 0.00
9/2/2010 0.00
9/3/2010 0.00
9/4/2010 0.00
9/5/2010 0.00
9/6/2010 0.00
9/7/2010 0.00
9/8/2010 0.00
9/9/2010 0.00
9/10/2010 0.00
9/11/2010 0.00
9/12/2010 0.00
9/13/2010 0.00
9/14/2010 0.00
9/15/2010 0.00
9/16/2010 0.00
9/17/2010 0.00
9/18/2010 0.00
9/19/2010 0.00
9/20/2010 0.00
9/21/2010 0.00
9/22/2010 0.00
9/23/2010 0.00
9/24/2010 0.00
9/25/2010 0.00
9/26/2010 0.00
9/27/2010 0.00
9/28/2010 0.00
9/29/2010 0.00
9/30/2010 0.00



Observation Date Observation Time Precipitation Snowfall Snowfall SWE Snow Depth Snow SWE Notes
1/4/2010 9:00 AM 0.02 M M M M BP 1004 - cloudy, stormy
1/5/2010 8:00 AM 0.37 M M M M BP 1003-1011 - rain overnight, sunny AM
1/6/2010 8:00 AM 0.47 M M M M 2:20 p.m. downpour w/ small hail (<2mm) about 1-2 min duration
1/7/2010 9:00 AM 0.04 M M M M
1/8/2010 7:00 AM 0.00 0.0 M M M
1/13/2010 7:00 AM 0.00 0.0 M M M
1/14/2010 7:00 AM 0.00 0.0 M M M
2/4/2010 9:00 AM 0.00 0.0 M M M Barometric Pressure: 1005 falling High clouds
2/23/2010 9:00 AM 0.72 M M M M
2/28/2010 9:00 AM 0.57 M M M M
3/2/2010 9:00 AM 0.49 M M M M
3/3/2010 9:00 AM 0.60 M M M M
3/4/2010 8:00 AM 0.33 M M M M
3/5/2010 9:00 AM 0.00 0.0 M M M
3/7/2010 8:00 AM 0.00 0.0 M M M
3/8/2010 9:00 AM 0.00 0.0 M M M
3/9/2010 8:00 AM 0.03 M M M M Two very gusty storm cells passed over with hard rain, very cold air temp (40 dF) at 3:00 - 3:45 p.m., and 6:00-6:30 p.m. Rainbows occurred both times, with spectacular towering cumulus in all directions.
3/10/2010 8:00 AM 0.13 M M M M Cold overnight - down to high 30's. Cool, crisp clear morning. BP: 1017
3/11/2010 8:00 AM 0.01 M M M M
3/12/2010 8:00 AM 0.00 0.0 M M M Trace in bottom
3/13/2010 8:00 AM 0.39 M M M M Rained steadily most of Friday 3/12 BP 1015
3/14/2010 7:00 AM 0.00 0.0 M M M
3/15/2010 9:00 AM 0.00 0.0 M M M
3/16/2010 9:00 AM 0.00 0.0 M M M
3/17/2010 8:00 AM 0.00 0.0 M M M
3/18/2010 8:00 AM 0.00 0.0 M M M Clear with high stratus clouds - warm Baramoter falling steadily all day - from 1016 at 8 am to 1011 at 3:45 pm 4:30 Reached 85 dF on my back deck in sun
3/19/2010 9:00 AM 0.00 0.0 M M M
3/20/2010 7:00 AM 0.00 0.0 M M M
3/21/2010 7:00 AM 0.00 0.0 M M M
3/22/2010 8:00 AM 0.00 0.0 M M M
3/23/2010 8:00 AM 0.00 0.0 M M M
3/24/2010 9:00 AM 0.00 0.0 M M M
3/25/2010 9:00 AM 0.06 M M M M rain began 9:30 pm - gusty winds began about 5 p.m. and lasted through the storm
3/26/2010 9:00 AM 0.06 M M M M
3/27/2010 9:00 AM 0.00 0.0 M M M
3/29/2010 9:00 AM 0.00 0.0 M M M
3/30/2010 9:00 AM 0.02 M M M M Since 9 a.m. observation we've had numerous cells pass over with gusty winds and heavy short duration downpours (more on tomorrow's report) measuring .11 since then. BP=1010 steady.
3/31/2010 9:00 AM 0.30 M M M M Several gusty storm cells came over yesterday dropping heavy rain for short durations (5 min) - two spectacular evening rainbows during downpour.
4/1/2010 9:00 AM 0.12 M M M M
4/2/2010 9:00 AM 0.02 M M M M
4/3/2010 9:00 AM 0.07 M M M M
4/4/2010 9:00 AM T M M M M Started raining hard about 11:30 a.m. - BP 1005
4/5/2010 9:00 AM 0.88 M M M M
4/6/2010 9:00 AM 0.05 M M M M
4/7/2010 9:00 AM 0.00 0.0 M M M
4/8/2010 9:00 AM 0.00 0.0 M M M
4/10/2010 9:00 AM 0.00 0.0 M M M Rain just started about 11:30 a.m. We've had gusty winds all morning. BP 1009.
4/11/2010 9:00 AM T M M M M
4/12/2010 9:00 AM 1.81 M M M M 0.6 in of rain yesterday to sunset. Heavy rainfall in passing storm cells over night.
4/13/2010 9:00 AM 0.19 M M M M All rain occurred in heavy passing showers yesterday morning. One shower provided nearly a full 10th!
4/14/2010 9:00 AM 0.00 0.0 M M M
4/15/2010 9:00 AM 0.00 0.0 M M M
4/18/2010 9:00 AM 0.00 0.0 M M M
4/19/2010 9:00 AM 0.00 0.0 M M M
4/20/2010 9:00 AM 0.30 M M M M GOOD RAIN OVER NIGHT.
4/21/2010 9:00 AM 0.05 M M M M
4/22/2010 9:00 AM 0.08 M M M M Rainfall was from yesterday morning between 9 a.m and 1:00 p.m. or so, passing storm cells. Nothing heavy.
4/23/2010 9:00 AM 0.00 0.0 M M M
4/24/2010 9:00 AM 0.00 0.0 M M M
4/25/2010 9:00 AM 0.00 0.0 M M M
4/26/2010 9:00 AM 0.00 0.0 M M M
4/27/2010 9:00 AM 0.05 M M M M Very windy - only light rain so far.
4/28/2010 9:00 AM 0.07 M M M M
4/29/2010 9:00 AM 0.09 M M M M
4/30/2010 9:00 AM 0.15 M M M M We had a Thunderstorm downpour (with very small hail, ball bearing size) from 3:00-3:30 pm with local street flooding, and 0.10 inch of rain. We had a second downpour from 5:30 to 6:15 pm more ball-bearing size hail (about 10 min duration) and only 0.05 in rain.
5/1/2010 9:00 AM 0.00 0.0 M M M
5/2/2010 9:00 AM 0.00 0.0 M M M
5/3/2010 9:00 AM 0.00 0.0 M M M
5/4/2010 7:00 AM 0.00 0.0 M M M
5/5/2010 9:00 AM 0.00 0.0 M M M
5/6/2010 7:00 AM 0.00 0.0 M M M
5/7/2010 7:00 AM 0.00 0.0 M M M
5/8/2010 7:00 AM 0.00 0.0 M M M
5/9/2010 7:00 AM 0.00 0.0 M M M
5/10/2010 9:00 AM 0.20 M M M M Several short but intense storm cells passed over yesterday with wind and rain.
5/11/2010 9:00 AM 0.17 M M M M
5/12/2010 9:00 AM 0.00 0.0 M M M
5/13/2010 9:00 AM 0.00 0.0 M M M
5/21/2010 9:00 AM 0.24 M M M M
5/26/2010 9:00 AM 0.18 M M M M
5/28/2010 9:00 AM 0.47 M M M M
6/3/2010 9:00 AM 0.00 0.0 M M M
6/8/2010 9:00 AM 0.00 0.0 M M M
9/1/2010 7:00 AM 0.00 0.0 M M M
9/2/2010 7:00 AM 0.00 0.0 M M M
9/3/2010 7:00 AM 0.00 0.0 M M M
9/4/2010 7:00 AM 0.00 0.0 M M M
9/5/2010 7:00 AM 0.00 0.0 M M M
9/6/2010 7:00 AM 0.00 0.0 M M M
9/7/2010 7:00 AM 0.00 0.0 M M M
9/8/2010 7:00 AM 0.00 0.0 M M M
9/9/2010 7:00 AM 0.00 0.0 M M M
9/10/2010 7:00 AM 0.00 0.0 M M M
9/11/2010 7:00 AM 0.00 0.0 M M M
9/12/2010 7:00 AM 0.00 0.0 M M M
9/13/2010 7:00 AM 0.00 0.0 M M M
9/14/2010 7:00 AM 0.00 0.0 M M M
9/15/2010 7:00 AM 0.00 0.0 M M M
9/16/2010 7:00 AM 0.00 0.0 M M M
9/17/2010 7:00 AM 0.00 0.0 M M M
9/18/2010 7:00 AM 0.00 0.0 M M M
9/19/2010 7:00 AM 0.00 0.0 M M M
9/20/2010 7:00 AM 0.00 0.0 M M M
9/21/2010 7:00 AM 0.00 0.0 M M M
9/22/2010 7:00 AM 0.00 0.0 M M M
9/23/2010 7:00 AM 0.00 0.0 M M M
9/24/2010 7:00 AM 0.00 0.0 M M M
9/25/2010 7:00 AM 0.00 0.0 M M M
9/26/2010 7:00 AM 0.00 0.0 M M M
9/27/2010 7:00 AM 0.00 0.0 M M M
9/28/2010 7:00 AM 0.00 0.0 M M M
9/29/2010 7:00 AM 0.00 0.0 M M M
9/30/2010 7:00 AM 0.00 0.0 M M M



Start Date End Date & Time Duration in Days Precipitation Snow Depth Snow Depth SWE Notes
2/18/2010 2/23/2010 6:00 PM 6 0.72 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