Placerville, CA (near 1,850 ft. elevation - 95667)

Wx Discussion - Wx Hazards - Wx Special Statements

Click For Expanded Forecast

Weather Forecast Discussion

000
FXUS66 KSTO 302115
AFDSTO

Area Forecast Discussion
National Weather Service Sacramento CA
115 PM PST Thu Nov 30 2023

.Synopsis...
Precipitation chances linger through the end of the week into the
early weekend. Quieter weather and a gradual warming trend are then
expected late weekend into early next week.

&&

.Discussion...
Longwave troughing aloft continues to dominate the
upper level pattern for interior NorCal today. Partly to mostly
cloudy skies are evident via latest GOES- West satellite imagery
as of early this afternoon as a result. High temperatures remain
on track to reach normal values by this afternoon despite the
cloud cover. A quick moving system is already bringing increasing
precipitation to portions of northern California and will continue
to spread precipitation chances east and southward throughout the
day and into the evening and overnight hours. Best chances for
accumulating precipitation look to remain over the mountains of
the Coastal Range, southern Cascades, and portions of the Sierra.
Probabilities for exceeding 4" of snowfall along the Sierra are in
the 40 to 60% range, with a 20 to 40% chance of exceeding 2" of
snowfall along areas of the southern Cascades. Elsewhere,
primarily throughout Shasta and Tehama counties, probabilities of
exceeding 0.25" of rainfall are in the 20 to 40% range. These
precipitation chances will follow the trajectory of the attendant
shortwave and as such, look to taper off moving into the day on
Friday. Furthermore, as an area of clearing works into the region
overnight, cold early morning temperatures are expected, with a 20
to 40% chance of temperatures below 32F in the central Sacramento
Valley and a 50 to 70% chance across the northern Sacramento
Valley.

As the flow pattern aloft remains generally northwesterly into
interior NorCal, chances for light precipitation will persist into
the early weekend as another shortwave moves through. Given the
upper level flow pattern, the best chances for accumulating
precipitation look to remain confined to the Coastal Range and
attendant portions of the northern Sacramento Valley. This will
likely result in more isolated shower activity than anything, with a
40 to 70% chance of exceeding 0.25" of precipitation with this
system in these areas from Friday evening into Saturday.

Upper level ridging will then begin to push the longwave troughing
eastward late weekend into early next week. This will result in
quieter weather from Sunday into Monday alongside a gradual warming
trend. High temperatures rebound into the low to mid 60s by Monday
afternoon throughout the Valley, with 50s anticipated in the
mountains.

.EXTENDED DISCUSSION (Monday THROUGH Thursday)...

As upper level ridging persists across the early week period, the
quiet and warm weather pattern will prevail into Tuesday and
partially into Wednesday. High temperatures in the Valley look to
breach the mid 60s both days, with mid to upper 50s in the
mountains. By mid to late week, the upper ridge is expected to
transition eastward toward the central US as an upper trough digs
down from the Gulf of Alaska over the Eastern Pacific. This will
result in a southwesterly flow setup over interior NorCal during
this time frame. This flow pattern will be conducive for periodic
shortwaves to bring precipitation chances to at least portions of
the forecast area with temperatures falling as this occurs.

&&

.AVIATION...

VFR conditions are expected to continue for the next 24 hours
except widespread MVFR/IFR over the northern Sierra with snow
showers (thru about 06Z Friday). Some MVFR haze possible across the
northern San Joaquin Valley Friday morning depending on how fast
skies clear out behind system that moves across tonight. Surface
wind gusts generally below 12 kts.

&&

.STO WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

Hazardous Weather Outlook

View a Different U.S. Hazardous Weather Location (In alphabetical order by state) Alabama, Birmingham Alabama, Huntsville Alabama, Mobile Alaska, Anchorage Alaska, Fairbanks Alaska, Juneau Arizona, Flagstaff Arizona, Phoenix Arizona, Tucson Arkansas, Little Rock California, Eureka California, Los Angeles/Oxnard California, Sacramento California, San Diego California, San Francisco Bay Area California, San Joaquin Valley/Hanford Colorado, Denver/Boulder Colorado, Grand Junction Colorado, Pueblo Florida, Jacksonville Florida, Key West Florida, Melbourne Florida, Miami Florida, Tallahassee Florida, Tampa Bay Ruskin Georgia, Atlanta/Peachtree Hawaii, Honolulu Idaho, Boise Idaho, Pocatello/Idaho Falls Illinois, Lincoln Illinois, Chicago/Romeoville Indiana, Indianapolis Indiana, Northern Indiana Iowa, Des Moines Iowa, Quad Cities Kansas, Dodge City Kansas, Goodland Kansas, Topeka Kansas, Wichita Kentucky, Jackson Kentucky, Louisville Kentucky, Paducah Louisiana, Lake Charles Louisiana, New Orleans/Baton Rouge Louisiana, Shreveport Maine, Caribou Maine, Gray Maryland, Baltimore/Washington Massachusetts, Taunton Michigan, Detroit/Pontiac Michigan, Grand Rapids Michigan, Marquette Michigan, Gaylord Minnesota, Duluth Minnesota, Twin Cities/Chanhassen Mississippi, Jackson Missouri, Kansas City/Pleasant Hill Missouri, Springfield Missouri, St. Louis Montana, Billings Montana, Glasgow Montana, Great Falls Montana, Missoula Nebraska, Hastings Nebraska, North Platte Nebraska, Omaha/Valley Nevada, Elko Nevada, Las Vegas Nevada, Reno New Mexico, Albuquerque New Jersey, Philadelphia/Mt Holly New York, Albany New York, Binghamton New York, Buffalo New York, New York City North Carolina, Newport/Morehead City North Carolina, Raleigh/Durham North Carolina, Wilmington North Dakota, Bismarck North Dakota, Grand Forks Ohio, Wilmington Ohio, Cleveland Oklahoma, Norman Oklahoma, Tulsa Oregon, Medford Oregon, Pendleton Oregon, Portland Pennsylvania, State College Pennsylvania, Philadelphia/Mt Holly Pennsylvania, Pittsburgh South Carolina, Charleston South Carolina, Columbia South Carolina, Greenville/Spartanburg South Dakota, Aberdeen South Dakota, Rapid City South Dakota, Sioux Falls Tennessee, Knoxville/Tri-Cities Tennessee, Memphis Tennessee, Nashville Texas, Amarillo Texas, Austin/San Antonio Texas, Brownsville Texas, Corpus Christi Texas, Dallas/Fort Worth Texas, El Paso, TX/Santa Teresa Texas, Houston/Galveston Texas, Lubbock Texas, Midland/Odessa Texas, San Angelo Utah, Salt Lake City Vermont, Burlington Virginia, Baltimore/Washington DC Virginia, Blacksburg Virginia, Wakefield Washington, Seattle/Tacoma Washington, Spokane West Virginia, Charleston Wisconsin, Green Bay Wisconsin, La Crosse Wisconsin, Milwaukee/Sullivan Wyoming, Riverton America Samoa, Pago Pago Guam, iyan Puerto Rico, San Juan

Public Information Statement [ If Any ]