WEATHER SUMMARY AND FORECAST DETAILS
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FOR 4/4/2020 - from Medford NWS
We are going to see two separate systems impact our region through Tuesday. The first one is coming in on us today. For the most part, this first system will be more beneficial than impactful, especially in terms of water resources. Up to an inch is expected along the coast, especially in the higher terrain of Curry County, with between a quarter to half an inch in the Cascades, and generally around a quarter of an inch for all other locations. In fact, there won`t really be much of a break in precipitation for the coast as the next system moves into the area late this afternoon and evening.
The second trough will drop south towards the area this afternoon, quickly pushing the first trough through the area. As this happens, breezy to gusty winds could approach advisory levels for the typical areas (Shasta Valley, East side) this afternoon into Sunday morning. Some local guidance is suggesting strong winds for these areas, but feel that it is overdone as forecast models indicate winds not sufficient enough for advisory criteria. Winds should diminish some after sunset, but will remain breezy into Sunday afternoon..
Another round of travel impacts is expected tonight into Sunday morning, with the focus turning to Northern California. The bulk of the impacts should remain above 4000 ft and the Winter Storm Warning covers this. There remains some uncertainty regarding snow levels in the Mt Shasta area, and current thinking is that snow levels will remain above Mount Shasta City, and therefore I 5. However, it`s not out of the question to see a rain/snow mix and if precipitation rates are high enough, there may be a brief period of snow. Given the recent warm temperatures, it`s difficult to judge just how much would accumulate on the roads. Road snow concerns will diminish during the daytime hours Sunday as snow levels rebound to 4000-4500 ft and precipitation becomes more spotty in nature. Widepsread showers are expected during the day Sunday and there is a slight chance of thunderstorms for much of the forecast area Sunday. Shower activity should diminish Sunday evening with the loss of daytime heating and upper dynamics shifting south with the low.
While showers will continue into Monday morning, coverage will be considerably less and focused in Northern California as the upper low moves south into Southern California. Upper level ridging will nudge into the area Tuesday, resulting in dry conditions with a warming trend that will continue through the end of the week.
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