Marine Weather and Tide Forecast for Walnut Grove, CA

DISCUSSION
Cumulus are beginning to develop along the Sierra Crest this morning, with thunderstorm activity possible this afternoon (10-20% chance on the western side of the crest, south of I-80). Thunderstorms that do develop are expected to move eastward, and the majority of activity is anticipated further south and east. Due to the potential for wet and dry thunderstorms with lightning and (of primary concern) gusty outflow winds, a Red Flag Warning remains in effect until 9pm for the Sierra south of I-80 and above 5000 feet.

In addition to thunderstorm chances, the current pattern brings well below normal high temperatures through the weekend. Valley temperatures are expected to be in the 80s today and tomorrow, increasing slightly over the weekend and warming again throughout next week. Thunderstorm chances diminish significantly tomorrow (less than 10% everywhere), and interior NorCal then settles into a calmer and drier pattern with near normal temperatures well into next week.

AVIATION
VFR conditions prevail across interior NorCal next 24 hours.
Breezy onshore flow will continue today, with surface winds below 15 kts with gusts up to 25 kts this afternoon and evening as Delta Breeze increases. Valley winds lower after 04z Friday but will see continued 15-25 kt gusts over the Delta through 18z Friday.
Mountain thunderstorm chances continue through around 03z Friday with lingering 10-15% chance on Friday.

STO WATCHES/WARNINGS/ADVISORIES
Red Flag Warning until 9 PM PDT this evening for Sierra (Cal- Tuo) Above 5000 ft-Sierra (El Dorado-Amador) Above 5000 ft.