A cut-off low rotating off the San Fransisco Bay is going to be the main weather maker this week and will begin moving north over the next few days bringing more thunderstorm activity to the region. Thunderstorms today will mainly be isolated to northern California and Klamath and Lake counties, mainly the southeast reaches of each county. Storms today and tomorrow will be a mix of dry and wet while Thursday storms will produce heavy rain and potentially lead to flash flooding. A Red Flag Warning is in effect for Siskiyou county and east of the Cascades for the liklihood of thunderstorms producing abundant lightning, gusty winds, and dry fuels.
The reason moisture will be increasing through the week is that not only is there a cut-off low wrapping up moisture from the Southwest but a high pressure over the Great Basin is also filtering moisture. Thursday we’ll be able to tap into enough moisture that once again we could see storms drop inches of rain and large hail. Be prepare for conditions to change quickly in the afternoons, especially at the higher elevations and be able to get indoors.
A trough will be over the area through the weekend keeping temperatures at or just below normal for mid-Summer, but this also leaves the door open for disturbances to bring showers or thunderstorms to the area. So there is a slight chance for thunderstorms this weekend, mainly in the mountains and potential the east side.
Thanks for logging on and have a great Tuesday!