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Cupertino, California

current conditions

46°
Overcast
Feels Like:  46°
Humidity: 79%
Wind/Dir: 0 Mph / North
Visibility: 10.0 Miles
Clouds: OVC at 3300ft
Sunrise: 7:17 AM
Sunset: 5:22 PM
Barometer: 29.72
Dewpoint: 40° F
UV: 0
Updated:7:45 PM PST on January 22, 2017

next 36 hours

Today
Chance of Rain
Temp: 56° Humidity: 93% Precip: 60% Wind: 25 mph
Tonight
Chance of Rain
Temp: 41° Humidity: 89% Precip: 60% Wind: 3 mph
Monday
Chance of T-Storm
Temp: 52° Humidity: 89% Precip: 50% Wind: 10 mph
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Sunday, 22
56 | 41 °F
Chance of Rain
Chance of
Precipitation
60%
Monday, 23
52 | 39 °F
Chance of T-storms
Chance of
Precipitation
50%
Tuesday, 24
55 | 34 °F
Partly Cloudy
Chance of
Precipitation
10%
Wednesday, 25
57 | 39 °F
Partly Cloudy
Chance of
Precipitation
10%
Thursday, 26
57 | 36 °F
Partly Cloudy
Chance of
Precipitation
10%
Friday, 27
58 | 38 °F
Clear
Chance of
Precipitation
10%
Saturday, 28
61 | 40 °F
Clear
Chance of
Precipitation
0%
Sunday, 29
62 | 41 °F
Clear
Chance of
Precipitation
0%
Sunday Night
nt_chancerain Cloudy with showers. Thunder possible. Low 41F. Winds SSW at 5 to 10 mph. Chance of rain 60%.
Sunday
chancerain Chance of showers. Lows overnight in the low 40s.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 44 55 | 45 46 | 39 45 | 41
Wind 0 mph North 7 mph ESE 0 mph North 7 mph SSW
Humidity 81% 70% 77% 86%
Chance of Precip. 0% 0% 0% 50%
Cloud Cover % % % 93%
Conditions Chance of Rain
Sunrise & Sunset
7:17 AM
5:22 PM
Source: Weather Underground BestForecast  
Monday
chancetstorms Scattered showers and thunderstorms. High 52F. Winds SSW at 5 to 10 mph. Chance of rain 50%.
Monday Night
nt_chancerain Showers in the evening, then cloudy overnight. Thunder possible. Low 39F. Winds SSE at 5 to 10 mph. Chance of rain 50%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 38 51 | 42 45 | 39 42 | 40
Wind 5 mph S 5 mph SSW 4 mph SSW 5 mph SSE
Humidity 88% 72% 79% 93%
Chance of Precip. 50% 50% 50% 20%
Cloud Cover 100% 67% 75% 90%
Conditions Chance of Rain Chance of a Thunderstorm Chance of Rain Overcast
Sunrise & Sunset
7:17 AM
5:23 PM
Source: Weather Underground BestForecast  
Tuesday
partlycloudy Mostly cloudy early, then afternoon sunshine. High around 55F. Winds ENE at 5 to 10 mph.
Tuesday Night
nt_clear Mostly clear. Low 34F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 41 | 39 51 | 40 47 | 39 40 | 35
Wind 6 mph SE 6 mph ENE 4 mph N 2 mph SE
Humidity 92% 66% 71% 84%
Chance of Precip. 20% 0% 0% 10%
Cloud Cover 93% 30% 4% 4%
Conditions Overcast Partly Cloudy Clear Clear
Sunrise & Sunset
7:16 AM
5:24 PM
Source: Weather Underground BestForecast  
Wednesday
partlycloudy Considerable clouds early. Some decrease in clouds later in the day. High 57F. Winds light and variable.
Wednesday Night
nt_mostlycloudy Partly cloudy skies during the evening will give way to cloudy skies overnight. Low 39F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 36 | 32 55 | 37 49 | 39 44 | 39
Wind 2 mph SE 3 mph E 2 mph NW 2 mph SE
Humidity 86% 52% 68% 83%
Chance of Precip. 10% 0% 0% 20%
Cloud Cover 61% 50% 23% 78%
Conditions Mostly Cloudy Partly Cloudy Clear Mostly Cloudy
Sunrise & Sunset
7:16 AM
5:25 PM
Source: Weather Underground BestForecast  
Thursday
partlycloudy Cloudy skies early, followed by partial clearing. High 57F. Winds NE at 5 to 10 mph.
Thursday Night
nt_clear Mostly clear skies. Low 36F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 37 53 | 41 49 | 41 43 | 37
Wind 3 mph ESE 4 mph NE 4 mph N 2 mph NE
Humidity 88% 64% 73% 80%
Chance of Precip. 10% 0% 0% 10%
Cloud Cover 77% 57% 13% 60%
Conditions Mostly Cloudy Partly Cloudy Clear Mostly Cloudy
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Friday
clear Sunny skies. High 58F. Winds NNE at 5 to 10 mph.
Friday Night
nt_clear A mostly clear sky. Low 38F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 38 | 34 54 | 38 50 | 38 42 | 34
Wind 2 mph NE 6 mph NNE 4 mph NNE 2 mph E
Humidity 89% 54% 63% 74%
Chance of Precip. 10% 0% 0% 0%
Cloud Cover 10% 9% 5% 20%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Saturday
clear Sunny. High 61F. Winds light and variable.
Saturday Night
nt_clear A mostly clear sky. Low near 40F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 40 | 34 55 | 38 53 | 39 43 | 36
Wind 3 mph E 4 mph ENE 3 mph ENE 2 mph ESE
Humidity 79% 53% 58% 74%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 13% 14% 14% 15%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Sunday
clear A few clouds from time to time. High 62F. Winds light and variable.
Sunday Night
nt_clear Clear skies. Low 41F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 42 | 35 57 | 39 55 | 40 44 | 37
Wind 3 mph ENE 4 mph ENE 4 mph ENE 3 mph E
Humidity 76% 52% 57% 77%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 25% 24% 14% 13%
Conditions Clear Clear Clear Clear
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Monday
clear Sunny. High 68F. Winds light and variable.
Monday Night
nt_partlycloudy Mostly clear early then increasing cloudiness overnight. Low 47F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 44 | 36 63 | 43 59 | 46 49 | 41
Wind 4 mph ENE 5 mph ENE 4 mph E 4 mph SE
Humidity 74% 48% 61% 75%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 9% 16% 19% 61%
Conditions Clear Clear Clear Mostly Cloudy
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Tuesday
partlycloudy Partly to mostly cloudy. High around 65F. Winds light and variable.
Tuesday Night
nt_mostlycloudy Partly cloudy skies in the evening, then becoming cloudy overnight. Low 47F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 41 60 | 44 58 | 46 50 | 42
Wind 3 mph E 4 mph ENE 3 mph S 3 mph SSE
Humidity 73% 55% 66% 75%
Chance of Precip. 0% 0% 0% 0%
Cloud Cover 68% 42% 34% 72%
Conditions Mostly Cloudy Partly Cloudy Partly Cloudy Mostly Cloudy
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Wednesday
partlycloudy Cloudy skies early, then partly cloudy in the afternoon. High near 60F. Winds light and variable.
Wednesday Night
nt_mostlycloudy Partly cloudy skies during the evening will give way to cloudy skies overnight. Low 47F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 49 | 43 58 | 45 56 | 46 50 | 44
Wind 2 mph E 4 mph NE 4 mph WSW 2 mph S
Humidity 80% 63% 70% 80%
Chance of Precip. 0% 0% 0% 20%
Cloud Cover 83% 53% 54% 88%
Conditions Overcast Partly Cloudy Partly Cloudy Overcast
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Thursday
mostlycloudy Mostly cloudy skies. High 58F. Winds SSW at 5 to 10 mph.
Thursday Night
nt_chancerain Mostly cloudy skies early with showers developing late. Low 46F. Winds light and variable. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 48 | 44 56 | 46 54 | 46 49 | 45
Wind 1 mph SSE 4 mph SSW 5 mph SW 5 mph S
Humidity 86% 70% 74% 85%
Chance of Precip. 20% 10% 20% 20%
Cloud Cover 94% 66% 63% 92%
Conditions Overcast Mostly Cloudy Mostly Cloudy Overcast
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Friday
chancerain Showers in the morning, then partly cloudy in the afternoon. High 56F. Winds SSW at 5 to 10 mph. Chance of rain 40%.
Friday Night
nt_chancerain Cloudy with occasional rain showers. Low 46F. Winds light and variable. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 47 | 46 55 | 48 53 | 48 49 | 46
Wind 4 mph S 5 mph SSW 6 mph SW 4 mph SSW
Humidity 94% 79% 82% 91%
Chance of Precip. 40% 30% 30% 40%
Cloud Cover 89% 57% 51% 79%
Conditions Chance of Rain Chance of Rain Chance of Rain Chance of Rain
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Saturday
chancerain Rain showers early with some sunshine later in the day. High around 55F. Winds SW at 5 to 10 mph. Chance of rain 40%.
Saturday Night
nt_chancerain Considerable cloudiness with occasional rain showers. Low 44F. Winds SSW at 5 to 10 mph. Chance of rain 40%.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 47 | 45 53 | 45 52 | 43 47 | 43
Wind 3 mph SSW 6 mph WSW 7 mph WSW 5 mph S
Humidity 94% 74% 73% 86%
Chance of Precip. 40% 20% 20% 40%
Cloud Cover 88% 59% 49% 75%
Conditions Chance of Rain Partly Cloudy Partly Cloudy Chance of Rain
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  
Sunday
chancerain Chance of a shower or two during the morning, followed by partly cloudy skies in the afternoon. High near 55F. Winds SW at 5 to 10 mph. Chance of rain 30%.
Sunday Night
nt_mostlycloudy Partly cloudy skies early will become overcast later during the night. Low 43F. Winds light and variable.
Hourly Forecast 6AM 12 Noon 6PM 12 Midnight
Temp. | Dew Point 45 | 42 53 | 44 51 | 43 46 | 42
Wind 3 mph SSW 5 mph SW 6 mph W 5 mph SW
Humidity 89% 72% 75% 86%
Chance of Precip. 30% 20% 20% 10%
Cloud Cover 76% 52% 58% 84%
Conditions Chance of Rain Partly Cloudy Partly Cloudy Overcast
Sunrise & Sunset
7:15 AM
5:26 PM
Source: Weather Underground BestForecast  

History & Almanac

Today
Min Temp
Max Temp
Normal
43°F
59°F
Record
30°F
74°F
Year
2014

astronomy

January 22, 2017
Rise
Set
Actual Time
07:17 AM (PST)
05:22 PM (PST)
Moon
03:37 AM (PST)
02:04 PM (PST)
Length of Visible Light
11h 00m
Length of Day
10h 04m
Length of Day Percent
41.94%

Moon Phases

Today
Waning Crescent
Jan. 28 New
Feb. 04 First Quarter
Feb. 11 Full
Feb. 18 Last Quarter

Air Quality

  • Current
  • Good
  • OZONE
  • Current
  • Good
  • PM2.5
  • Sunday
  • Good
  • PM2.5
  • Monday
  • Good
  • PM2.5
  • Tuesday
  • Moderate
  • PM2.5
  • Wednesday
  • Moderate
  • PM2.5
Areal Flood Warning
Statement as of 6:00 am PST on January 22, 2017

... A Flood Warning for urban areas and small streams remains in
effect until 345 PM PST Monday for southeastern Santa Clara and
northwestern San Benito counties...

At 552 am PST, Doppler radar and automated rain gauges indicated an
area of heavy rainfall across the warned area.

Additional rainfall amounts of 1-2 inches are possible in the warned
area today and Monday. Development of convective storms accompanied
by heavy rainfall and lightning and hail are also possible.

NWS is retaining this areal Flood Warning for the area, assuming
standing water on the Pacheco creek floodplain and Soap Lake area
remains problematic and additional rain could exacerbate conditions.
The Pacheco creek stream gage near Dunneville is currently far below
the flood stage of 12 feet, but could rise rapidly in response to
rainfall today.

Precautionary/preparedness actions...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate Route.

A Flood Warning means that flooding is imminent or occurring. All
interested parties should take necessary precautions immediately.


Lat... Lon 3696 12136 3694 12136 3690 12138 3689 12147
      3691 12153 3694 12155 3698 12152 3700 12145
      3697 12141 3697 12137


Mws


Areal Flood Advisory, Flash Flood Watch
Statement as of 3:43 PM PST on January 22, 2017

The National Weather Service in the San Francisco Bay area has
extended the

* Flood Advisory for...
a dam floodgate release in...
southeastern Santa Clara County in northern California...
northwestern San Benito County in central California...

* until 345 PM PST Monday

* local water district and County emergency management personnel
have indicated that limited portions of the spillway structure for
Pacheco Lake have been compromised from prior storm activity and
spillway releases this winter. Specifically, there is concern that
renewed spillway releases anticipated in response to forecast
rainfall through the remainder of this weekend could cause
additional erosion of the spillway structure, which could lead to
excessive sediment and/or runoff to enter Pacheco creek
downstream. Excessive runoff and sediment could cause or increase
flooding downstream.

* NWS Monterey is forecasting only minor additional accumulations of
of less than a quarter of an inch through Monday in the Pacheco creek
watershed that feeds the Reservoir. Development of Post-frontal
convective thunderstorms through tonight could cause brief heavy rain
and locally higher amounts. Rainfall this weekend will likely be
accompanied by increased releases over the spillway, but it is
currently not expected that additional releases would pose additional
risk to the spillway or downstream areas.

* Engineers from the local water district as well as California
division of safety of dams and California department of water
resources engineers are on-site conducting inspections and
assessing the level of risk posed by current and expected
conditions. County emergency managers are aware of the situation
and are taking appropriate action and following necessary
protocols.

* There is no expectation at this time that a dam breach or failure
would occur. The dam itself is not compromised; it is only the
spillway structure that is under investigation.

* Should the situation worsen and elevate the threat to human life
and property, either prior to or during storm activity this
weekend, a Flash Flood Warning will be issued for affected areas.
Stay tuned to your wireless emergency alerts via cellular phone,
emergency alert system interruptions on local radio and television
stations, NOAA Weather Radio, twitter (@nwsbayarea), facebook
(nwsbayarea), and other local news and notification services
should a Flash Flood Warning be necessary.

Precautionary/preparedness actions...

Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be especially cautious at night when it is harder to recognize the
dangers of flooding.


Lat... Lon 3710 12127 3704 12127 3697 12133 3687 12136
      3687 12145 3689 12150 3690 12157 3696 12154
      3699 12149 3699 12144 3697 12141 3709 12131




1211 PM PST sun Jan 22 2017

... Flash Flood Watch now in effect through Monday afternoon...

The Flash Flood Watch is now in effect for

* a portion of western California... including the following
areas... coastal North Bay including Point Reyes National
Seashore... East Bay hills and the Diablo Range... East Bay
interior valleys... mountains of San Benito County and interior
Monterey County including Pinnacles National Monument... North
Bay interior valleys... North Bay mountains... northern Monterey
Bay... northern Salinas valley/Hollister Valley and Carmel
Valley... San Francisco... San Francisco Bay shoreline... San
Francisco peninsula coast... Santa Clara Valley including San
Jose... Santa Cruz Mountains... Santa Lucia mountains and Los
Padres National Forest... southern Monterey Bay and Big Sur
coast and southern Salinas valley/Arroyo Seco and Lake San
Antonio.

* Through Monday afternoon

* periods of heavy rain on already saturated soils and full
reservoirs will impact the region beginning this afternoon and
lasting through Monday.

* The primary impacts will be localized ponding of water on low
lying roadways with poor drainage... rapid rises on streams and
creeks with some likely exceeding bankfull... some river
flooding... and potential rock and mud slides. Recent burn
scars will also be susceptible to debris flows during periods
of intense rainfall.

Precautionary/preparedness actions...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should flash flood warnings be issued.


Drp