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Winter storm warning

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avatar Winter storm watch
December 24, 2010 05:43PM
Winter storm watch
Urgent - winter weather message
National weather service hanford ca
1050 am pst fri dec 24 2010

Caz096-097-250300-
/o.Con.Khnx.Ws.A.0023.101226t0200z-101226t2000z/
Sierra nevada from yosemite to kings canyon-
Tulare county mountains-
1050 am pst fri dec 24 2010

...Winter storm watch remains in effect from saturday evening
Through sunday morning above 6000 feet...

A winter storm watch above 6000 feet remains in effect from
Saturday evening through sunday morning for the higher elevations
Of the southern sierra nevada.

* snow accumulations: 8 to 12 inches above 6000 feet...And up
To 20 inches near the crest.

* elevation: above 6000 feet.

* timing: snow will begin near yosemite saturday afternoon and
Spread south through the evening. Snow will begin to taper
Off by noon sunday as the storm begins to move east of the
Region.

* locations include: grant grove...Lodgepole...Shaver lake...And
Huntington lake.

* winds: gusts up to 70 mph near the crest with blowing and
Drifting snow.

* impacts: people traveling into the high country of the
Southern sierra nevada...Including kings canyon...Sequoia and
Yosemite national parks...Should be prepared for winter
Driving conditions.

Precautionary/preparedness actions...

A winter storm watch means there is a potential for significant
Snow and strong winds that may impact travel. Continue to monitor
The latest forecasts.

&&

$$

Bso
avatar Winter storm warning
December 25, 2010 01:19PM
Winter storm warning
Urgent - winter weather message
National weather service hanford ca
1257 pm pst sat dec 25 2010

Caz096-097-260500-
/o.Con.Khnx.Ws.W.0023.101226t0200z-101226t1500z/
Sierra nevada from yosemite to kings canyon-
Tulare county mountains-
1257 pm pst sat dec 25 2010

...Winter storm warning remains in effect from 6 pm this evening
To 7 am pst sunday above 6000 feet...

A winter storm warning above 6000 feet remains in effect from
6 pm this evening to 7 am pst sunday for the higher elevations of
The southern sierra nevada.

* snow accumulations: 10 to 15 inches above 6000 feet...And up
To 2 feet near the crest.

* elevation: above 6000 feet.

* timing: snow will begin near yosemite this afternoon and
Spread south through the evening. Snow will begin to taper
Off by daybreak sunday as the storm begins to move east of
The region.

* locations include: lodgepole...Grant grove...Shaver
Lake...Huntington lake.

* winds: gusts up to 80 mph along the ridgetops and near the
Crest with blowing and drifting snow.

* impacts: people traveling into the high country of the
Southern sierra nevada...Including kings canyon...Sequoia
And yosemite national parks...Should be prepared for winter
Driving conditions. If you are planning travel bring a
Winter survival kit.

Precautionary/preparedness actions...

A winter storm warning means significant amounts of snow are
Expected or occurring. Strong winds are also possible. This will
Make travel very hazardous or impossible.

&&

$$

Bso
avatar Area forecast discussion
December 25, 2010 01:34PM
000
Fxus66 khnx 251802
Afdhnx

Area forecast discussion
National weather service san joaquin valley - hanford ca
1002 am pst sat dec 25 2010

.Synopsis...Another low pressure system moving into the area from
The pacific northwest is expected to bring some more rain and
Higher elevation snow along with some gusty winds near the
Grapevine and southern part of the san joaquin valley.
Precipitation is expected mainly this evening into early sunday
Morning. During next week...High pressure returns once again on
Monday and tuesday before another trough pushes southward to the
Region for wednesday into thursday.

&&

.Update...Some unusual weather conditions this morning. Some fog
In the high desert instead of the san joaquin valley. Fog mainly
Towards palmdale area. The dense fog over the san joaquin valley
Cleared out overnight. Fog cleared early due to vertical mixing by
Strong winds at lower levels. Satellite pictures show a n-s
Stretched out weather system along the coast moving onshore. The
Latest 12z vandenberg sounding shows lower level winds from south
To 45 kt with a temperature inversion to 6kt. This is resulting in
Strong downslope wind flow across the south valley. The
Bakersfield area has already reached the high forecast temperature
Due to the downslope adiabatic warming. Will need to make a few
Temperature adjustments for the morning update. Models continue to
Indicate tight pressure gradients across central california
Through 00z sunday. High winds will continue to be problematic for
Much of today over the tehachapi mountains and south end of the
San joaquin valley.

.Early discussion...Satellite imagery shows the incoming frontal
System now has stopped digging south and is heading east from
128w. Given the current path and timing of the forecast models,
The precipitation will reach the merced county by early afternoon
And the sierra by sunset. This system looks rather strong but due
To the projected fast movement across the forecast area the
Precipitation event will not last very long. Current winter storm
Warning for the sierra will likely be verified as after the
Frontal system passes, orographic flow behind the front will allow
For additional snow in the sierra. Winds will remain rather strong
Below mountain passes and far south end of the san joaquin valley.
In addition the west side mountains and passes will see the
Potential for strong winds.

By late tonight, the front will be moving rapidly east and most
Non-mountain locations will see the precipitation come to an end.
By sunday afternoon the sierra snow showers will come to an end
With the area coming under the influence of high pressure on
Monday. The break in precipitation will be short lived as models
Bring the next system into central california tuesday night and
Wednesday. This feature looks to be a fast hitter also however due
To the northerly flow in its wake some rather cold canadian air
Will be pulled southward into the region. Will need to keep a
Close watch on this situation to see how much cold air gets west
Of the sierra.

&&

.Aviation...An approaching trough will bring strong gusty winds over
Ridges and through passes with gusty conditions also in the san
Joaquin valley...Especially at the south end and along and west of
Interstate 5. Precip will spread into the region from the nw after
21z with deteriorating conditions developing in heavy snow across
The southern sierra. Between 02z-06z in the sjv...Some ifr conds
Are possible in heavier bursts of rain with fropa as well as wind
Shift. Precipitation should generally clear the region between
12-18z except some lingering higher elevation showers and local
Mountain obscurations.

&&

.Air quality issues...
None

&&

.Hnx watches/warnings/advisories...
Winter storm warning from 6 pm this evening to 7 am pst sunday
Above 6000 feet for the caz096-097.

High wind warning until 10 pm pst this evening caz092-095.

Wind advisory until 7 pm pst this evening caz089-091.

&&

$$

Public...Mv
Avn/fw...Jeb
Synopsis...Bso
avatar Forecast map
December 25, 2010 01:45PM
avatar Hazardous weather outlook
December 26, 2010 12:47PM
Hazardous weather outlook
National weather service san joaquin valley - hanford ca
956 am pst sun dec 26 2010

Caz089>099-271230-
West central san joaquin valley-east central san joaquin valley-
Southwestern san joaquin valley-southeastern san joaquin valley-
Mariposa madera and fresno county foothills-
Tulare county foothills-kern county mountains-
Sierra nevada from yosemite to kings canyon-
Tulare county mountains-indian wells valley-
Southeastern kern county desert-
956 am pst sun dec 26 2010

...Another round of rain and higher elevation snow for the central
California interior...

This hazardous weather outlook is for all of interior central
California.

.Day one...Today and tonight

No hazardous weather is expected.

.Days two through seven...Monday through saturday

A cold low pressure system will impact the area tuesday night
Into wednesday evening bringing another round of rain to the san
Joaquin valley and foothills and heavy snow possible in the
Southern sierra nevada. Snow levels will likely stay around 5000
Feet in the sierra...While above pass levels in the kern county
Mountains...At the onset of precipitation but could drop even
Lower as the system moves eastward by wednesday evening.

Freezing temperatures are possible due to the cold air behind this
System by thursday morning...At this time temperatures may fall
Down to the upper 20s in the coldest locations throughout the san
Joaquin valley and the lower to mid 20s in the kern county desert.
In addition...Similar nighttime low temperatures could occur
Thursday night into friday morning.

.Spotter information statement...

Skywarn spotter activation will not be needed.

Weather spotters are encouraged to report any significant or
Unusual conditions to the national weather service.

$$

Bso
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