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Lower Placerville, CA (near 1,700 ft. elevation - 95667)
Wx Discussion - Wx Hazards - Wx Special Statements
NWS Forecast for 2 Miles WNW Diamond Springs CA
National Weather Service Forecast for: 2 Miles WNW Diamond Springs CA
Issued by: National Weather Service Sacramento, CA
Updated: 2:39 am PST Jan 16, 2019
 
Overnight

Overnight: Rain.  Steady temperature around 47. South southeast wind around 11 mph.  Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain

Wednesday

Wednesday: Rain.  High near 54. South southeast wind 17 to 20 mph, with gusts as high as 31 mph.  Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Rain

Wednesday
Night
Wednesday Night: Rain. The rain could be heavy at times.  Low around 46. Breezy, with a south southwest wind 20 to 29 mph, with gusts as high as 49 mph.  Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Heavy Rain
and Breezy
Thursday

Thursday: Showers. The rain could be heavy at times.  High near 51. South southwest wind 14 to 17 mph, with gusts as high as 28 mph.  Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Heavy Rain

Thursday
Night
Thursday Night: Showers, mainly before 10pm.  Low around 38. South southeast wind 6 to 8 mph.  Chance of precipitation is 90%.
Showers then
Chance
Showers
Friday

Friday: A 20 percent chance of showers before 10am.  Partly sunny, with a high near 54.
Slight Chance
Showers then
Partly Sunny
Friday
Night
Friday Night: Mostly cloudy, with a low around 40.
Mostly Cloudy

Saturday

Saturday: Partly sunny, with a high near 58.
Partly Sunny

Saturday
Night
Saturday Night: Mostly cloudy, with a low around 43.
Mostly Cloudy

Lo 47 °F Hi 54 °F Lo 46 °F Hi 51 °F Lo 38 °F Hi 54 °F Lo 40 °F Hi 58 °F Lo 43 °F

High Wind Watch
Flood Watch
 

Overnight
 
Rain. Steady temperature around 47. South southeast wind around 11 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
 
Rain. High near 54. South southeast wind 17 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
 
Rain. The rain could be heavy at times. Low around 46. Breezy, with a south southwest wind 20 to 29 mph, with gusts as high as 49 mph. Chance of precipitation is 100%. New precipitation amounts between 1 and 2 inches possible.
Thursday
 
Showers. The rain could be heavy at times. High near 51. South southwest wind 14 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between three quarters and one inch possible.
Thursday Night
 
Showers, mainly before 10pm. Low around 38. South southeast wind 6 to 8 mph. Chance of precipitation is 90%.
Friday
 
A 20 percent chance of showers before 10am. Partly sunny, with a high near 54.
Friday Night
 
Mostly cloudy, with a low around 40.
Saturday
 
Partly sunny, with a high near 58.
Saturday Night
 
Mostly cloudy, with a low around 43.
Sunday
 
Showers likely. Mostly cloudy, with a high near 56.
Sunday Night
 
A chance of showers. Mostly cloudy, with a low around 37.
M.L.King Day
 
Mostly sunny, with a high near 55.
Monday Night
 
Partly cloudy, with a low around 36.
Tuesday
 
Sunny, with a high near 57.

 

Forecast from NOAA-NWS for 2 Miles WNW Diamond Springs CA.

Weather Forecast Discussion
000
FXUS66 KSTO 152316
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
316 PM PST Tue Jan 15 2019


.SYNOPSIS...
Wet and windy weather is expected across the region through
Thursday with periods of heavy snowfall in the mountains. A brief
period of dry weather is expected before precipitation chances
return on the weekend.

&&

.DISCUSSION...
Water vapor imagery this afternoon distinctly shows the pair of
systems impacting Northern California. The lead shortwave is
currently moving through the Bay Area driving a broad axis of
light rainfall, generally on the order of 0.10" per hour. Mountain
impacts are already underway with accumulating snows over the
heavily traveled passes on I-80 and Highway 50. The heaviest burst
of snow is likely to occur early this evening into the overnight
hours with over a foot possible during this timeframe. In addition
to the increased coverage of precipitation, an uptick in the wind
speeds will be evident by later tonight. Winds are not expected to
slacken given the enhanced pressure gradient in advance of the
more vigorous system.

Lurking out around 150W longitude is the mentioned powerful
Pacific system expected to impact much of the state Wednesday
evening through Friday morning. Forecast anomalies with this
system with regards to typical atmospheric parameters (wind,
heights, etc.) are around 3 to 4 standard deviations from
climatology. The major hazards will include locally heavy
rainfall, several feet of mountain snows, high winds, as well as a
chance for some scattered thunderstorms.

The biggest hazard to travel will be the heavy mountain snows,
generally 5,000 feet and above. Snow levels will rise ahead of the
next storm which suggests the heaviest accumulations should sit
above 6,500 to 7,000 feet. The stronger winter storm is forecast
to spread several feet of snow to the Sierra and Southern
Cascades. Travel impacts will be high and travel is not advised
given intense snowfall rates coupled with high winds leading to
blizzard/whiteout conditions. Such hazards should persist through
Thursday night with scattered snow showers lingering into the
following morning.

While this will be a long duration rainfall event, the potential
threat for thunderstorms may ignite some short-term flash flood
concerns. This is particularly the case over any recent burns
scars so those will bear watching. Difficult to say this far out
where any such storms would develop, but instability appears
decent enough to support scattered convection Wednesday evening
into the overnight hours. Locally gusty winds would be possible
within any thunderstorms, but a more widespread high wind threat
remains given the strength of the approaching storm. 50 to 60 mph
southerly wind gusts cannot be ruled out across the Valley with
slightly higher numbers over mountain locales.

Once the system clears out on Friday morning, a transient upper
ridge moves across the western U.S. supporting a brief period of
improved weather. Global model agreement is rather good
suggesting high confidence in this pattern change ahead of the
weekend system.  BRO

&&
.EXTENDED DISCUSSION (Saturday THROUGH Tuesday)

Precipitation spreads into the northern Coastal Range Saturday
afternoon as ridge shifts eastward and a Pacific trough moves in.
This system will bring widespread precipitation on Sunday but rain
and snow amounts will be relatively light. Snow levels look to be
around 7000 feet Sunday falling to 4500 to 5500 feet Sunday
night. Some mountain travel impacts will be possible but should be
limited to mainly high Sierra passes.

Drying northerly winds are expected to increase Monday and Tuesday as
the trough exits, with breezy winds on the west side of the Valley.
A dry pattern sets in through mid week as the area remains on the
east side of a Pacific ridge.

-CJM

&&

.AVIATION...

Southerly flow aloft with local MVFR/IFR conditions possible over
interior Norhtern California in precipitation or BR next 24 hours.
Local SE gusts to 20-25 kts possible over the southern Sacramento
and northern San Joaquin Valley.
&&

.STO WATCHES/WARNINGS/ADVISORIES...
Winter Storm Warning until 4 AM PST Friday for West Slope
Northern Sierra Nevada-Western Plumas County/Lassen Park.

Blizzard Warning from 7 PM Wednesday to 7 AM PST Thursday for
West Slope Northern Sierra Nevada.

Flood Watch from Wednesday afternoon through Thursday morning
for Carquinez Strait and Delta-Central Sacramento Valley-Clear
Lake/Southern Lake County-Motherlode-Mountains Southwestern
Shasta County to Northern Lake County-Northeast
Foothills/Sacramento Valley-Northern Sacramento Valley-Northern
San Joaquin Valley-Shasta Lake Area / Northern Shasta County-
Southern Sacramento Valley.

High Wind Watch from Wednesday afternoon through late Wednesday
night for Carquinez Strait and Delta-Central Sacramento Valley-
Clear Lake/Southern Lake County-Motherlode-Mountains
Southwestern Shasta County to Northern Lake County-Northeast
Foothills/Sacramento Valley-Northern Sacramento Valley-Northern
San Joaquin Valley-Southern Sacramento Valley.

Winter Storm Warning until 4 AM PST Friday for Burney Basin /
Eastern Shasta County.

&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather

Hazardous Weather Outlook
000
FLUS46 KMTR 141454
HWOMTR

Hazardous Weather Outlook
National Weather Service San Francisco CA
654 AM PST Mon Jan 14 2019

CAZ006-505>513-516>518-528>530-150800-
San Francisco-
Coastal North Bay Including Point Reyes National Seashore-
North Bay Interior Valleys-North Bay Mountains-
San Francisco Bay Shoreline-San Francisco Peninsula Coast-
East Bay Interior Valleys-East Bay Hills and the Diablo Range-
Santa Cruz Mountains-Santa Clara Valley Including San Jose-
Southern Salinas Valley/Arroyo Seco and Lake San Antonio-
Santa Lucia Mountains and Los Padres National Forest-
Mountains Of San Benito County And Interior Monterey County
Including Pinnacles National Park-
Northern Salinas Valley/Hollister Valley and Carmel Valley-
Northern Monterey Bay-Southern Monterey Bay and Big Sur Coast-
654 AM PST Mon Jan 14 2019

This hazardous weather outlook is for the San Francisco Bay Area
and Central Coast

.DAY ONE...Today and Tonight

Some scattered showers will continue today into tonight. Gusty
southeast to east winds will persist near the coast and coastal
hills with gusts to 35 mph likely at times as low pressure deepens
off the coast. Scattered showers will continue overnight into
Tuesday.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Periods of light rain continue on Tuesday but with minimal impacts
expected. A strong front arrives Wednesday afternoon into
Wednesday night. Heavy rain will develop across the North Bay
first and then spread southward, wreaking havoc on the Wednesday
afternoon/evening commute. Strong winds will accompany the
frontal passage which could bring down trees and branches. The
heavy rain will likely lead to urban and small stream flooding as
the front moves through Wednesday night. On average 3-6 inches of
rain will be possible in the hills with 1-3 inches in the lower
elevations by Thursday morning with much of the rain falling
during a short window late Wednesday as the front moves through.

Expect rapid rises on small streams but large rivers are forecast
to remain well within bankfull.

High pressure builds Friday and Saturday with dry weather. Another
chance of light rain on Sunday.

$$
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(In alphabetical order by state)

Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather

Public Information Statement [ If Any ]



There Is No Public Information Statement At This Time



Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather




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