Forecast and Conditions for Upland, California

Updated: 2:40 PM PDT on May 17, 2008
Observed at _Top of Saphire in..., Alta Loma, California
Temperature 94.7 °F / 34.8 °C
Humidity 15%
Dew Point 40 °F / 4 °C
Wind SW at 6.0 mph / 9.7 km/h
Pressure 29.90 in / 1012.4 hPa (Falling)
Conditions Partly Cloudy
Visibility 10.0 miles / 16.1 kilometers
Clouds (FEW) : 25000 ft / 7620 m
Yesterday's Maximum 100 °F / 37 °C
Yesterday's Minimum 64 °F / 17 °C
Normal high 80 °F / 26 °C
Normal low 53 °F / 11 °C
Record high 102 °F / 38 °C (1970)
Record low 42 °F / 5 °C (1981)
Yesterday's Heating Degree Days 0
Yesterday's Cooling Degree Days 17
Sunrise05:47 AM (PDT)
Sunset07:47 PM (PDT)
Moon Rise06:00 PM (PDT)
Moon Set04:03 AM (PDT)
Moon Phase
Special Weather Statement
Statement as of 4:30 PM PDT on May 16, 2008


... Record breaking heat this weekend...

Strong high pressure aloft will build over Southern California this
weekend with record highs likely in many areas. Highs will soar
above 100 in the valleys and foothills... and exceed 110 in the lower
deserts. The coolest weather will be in the mountains above 6000
feet where highs will be in the 70s and 80s. The immediate coast may
also see some relief from afternoon sea breezes and a very shallow
marine layer.

People with outdoor activities this weekend should prepare for the
unseasonably hot weather. With afternoon temperatures in the inland
areas ranging from 95 to 105 degrees and humidities in the
teens... dehydration is a real threat. Regular water Intake will help
you stay hydrated. Wear loose fitting light weight clothing... and
take advantage of shade and air conditioning.

High temperatures forecast for Saturday and Sunday

Beaches... ... ... ... ... ... ... ... ... .70 to 80
coastal zones... ... ... ... ... ... ... .80 (coast) to 95 (inland)
inland valleys... ... ... ... ... ... ... 95 to 105
mountains below 6000 feet... ... ... .85 to 95
mountains above 6000 feet... ... ... .75 to 85
upper deserts... ... ... ... ... ... ... .93 to 103
lower deserts... ... ... ... ... ... ... .103 to 113

On Monday it will remain hot and dry in the inland
valleys... mountains and deserts. However... increasing onshore flow
will bring slight cooling to the coastal zones.

On Tuesday and Wednesday a trough of low pressure will bring cooler
weather to all areas.

Forecast as of 2:30 PM PDT on May 17, 2008

Tonight
Mostly clear. Lows 61 to 69. Winds west 5 to 15 mph in the evening becoming light.
Sunday
Mostly sunny. Highs 98 to 105. Light winds.
Sunday Night
Mostly clear. Lows 61 to 66. Winds west 10 to 15 mph in the evening becoming light.
Monday
Mostly sunny. Highs 92 to 100. Light winds becoming west 10 to 15 mph in the afternoon.
Monday Night
Mostly clear. Lows 57 to 64. Winds west 15 mph in the evening becoming light.
Tuesday
Mostly sunny. Highs 83 to 89.
Tuesday Night
Mostly clear. Patchy fog after midnight. Lows 56 to 61.
Wednesday
Mostly sunny. Patchy fog in the morning. Highs 78 to 83.
Wednesday Night
Mostly clear in the evening...becoming partly cloudy. Patchy fog after midnight. Lows 54 to 59.
Thursday
Partly cloudy in the morning...becoming mostly sunny. Patchy fog in the morning. Highs 74 to 81.
Thursday Night
Mostly clear in the evening...becoming partly cloudy. Patchy fog after midnight. Lows 52 to 57.
Friday
Partly cloudy in the morning...becoming mostly sunny. Patchy fog in the morning. Highs 73 to 78.
Friday Night
Mostly clear in the evening...becoming mostly cloudy. Patchy fog after midnight. Lows 52 to 57.
Saturday
Mostly cloudy in the morning...becoming mostly sunny. Patchy fog in the morning. Highs 73 to 78.
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