Marine Weather and Tide Forecast for Penn Valley, CA

Key Messages

* Fire Weather Watch in effect from 8 am PDT Sunday through 8 pm PDT Monday for Valley and Delta locations below 1000 feet.

* Today-Friday: -Dry weather, warm temperatures, and periodically breezy winds persist with areas of Minor HeatRisk in the Valley.

* Saturday: -Weather system begins to drop southward from Pacific NW.
-15-30% probability of isolated thunderstorms across northeast foothills and Sierra/southern Cascades from Interstate 80 northward.
-Temperatures cooling to near normal, with breezy winds throughout the day.

* Sunday - Monday: -Current ensemble trends indicate the expected weather system following an inside slider trajectory through the region.
-Gusty north to east winds expected to develop Sunday and Monday as this system progresses, with lingering breezy winds into Tuesday.
-Probability of gusts 40 mph or higher: --Sunday: 40-60%, highest along and west of I-5 in the Sacramento Valley.
--Monday: 20-40% across the northern/central Sacramento Valley and Delta.
-Critical fire weather conditions expected Sunday and Monday, due to the combination of gusty northerly winds and low relative humidity in the Sacramento Valley.

* Tuesday - Wednesday: -Warming trend expected early to mid next week, with areas of Moderate HeatRisk across the Valley.
-North to east winds expected to remain diurnally breezy while dry conditions prevail.
-Elevated fire weather conditions anticipated.

Changes from previous forecast
-Fire Weather Watch issued for Sunday morning into Monday evening for Valley and Delta locations below 1000 feet.
-Shower and thunderstorm chances shifting primarily to Interstate 80 northward on Saturday.
-Elevated fire weather conditions loo to persist into mid next week.
-Areas of Moderate HeatRisk for the Valley expected next week.

AVIATION
VFR conditions expected to prevail at TAF sites next 24 hours.
North-northwest winds remain breezy through the day, then becoming lighter after 06z. Winds generally expected to remain 12 kts or less, although some southwesterly gusts to 20 kts possible with Delta breeze influence 22z-05z. Breezier north winds are expected after 12Z through the northern and central Sacramento Valley with gusts up to 20 kts.

STO WATCHES/WARNINGS/ADVISORIES
Fire Weather Watch from Sunday morning through Monday evening for Carquinez Strait and Delta-Central Sacramento Valley in Glenn, Colusa, Yuba, Northern Sutter, and Butte County Below 1000 Ft-Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft-Northern San Joaquin Valley in San Joaquin and Stanislaus Counties Below 1000 ft-Southern Sacramento Valley in Yolo-Sacramento Far Western Placer, southern Sutter and Solano County Below 1000 Ft.