The upper level disturbance that has continued to bring showers and thunderstorms to the region is finally moving inland this evening. By tomorrow, it will start to lift north. This is going to shift the thunderstorm threat eastward, with the greatest chances along the Cascades & in the Klamath Basin. Siskiyou County may also see a stray thunderstorm Sunday afternoon and evening, but the Rogue Valley should just see spotty showers as most of the instability moves east as well.
For Saturday evening through Sunday morning, expect overnight rain showers and storms to continue developing. Heavy rain in a short amount of time, strong winds, lightning and hail are all the primary threats. Most of the activity that has developed today has been west of the Cascades, which is typical with the current weather conditions in place. Ed near Merlin reported 2.5″ of rain in just an hour! Precipitable water values are over 1″, which indicates a very moist atmosphere. With this being said, it makes sense that a lot of rain is falling.
If you have pictures of lightning, hail, heavy rain, etc — post them to my Facebook wall! Or you can email or message them in as well. I have gotten some wonderful pictures so far and I would love to share!
By Monday, a drier air mass will move into place and clearer skies will then return. Air quality has improved quite a bit from the heavy rains, but expect it to begin deteriorating now that this area of low pressure begins lifting north and the shower activity comes to an end. Seasonal temperatures and a fairly dry forecast is expected through much of the week!
Meteorologist Alyssa Caroprese