Northern CA Forecast Discussion

Area Forecast Discussion
National Weather Service Sacramento CA
204 PM PDT Wed Apr 8 2020

Synopsis... Lingering showers into Thursday, mainly over the Sierra Nevada south of HWY 50. Otherwise, dry and warmer with locally gusty northerly wind at times in the Central Valley.

.Discussion... Locally breezy northerly winds have developed across portions of the northern Sacramento Valley and adjacent terrain this afternoon. Gusts in the 15 to 30 mph range have been observed. Current afternoon temperatures are generally 10 to 15 degrees warmer compared to 24 hours ago across the northern Sacramento Valley, while the Sacramento metro area is about the same. Threat of wrap around showers continues through Thursday as a slow moving upper low lingers over SoCal. The best chances for showers will be over the Sierra, mainly south of HWY 50, with some light high elevation snow. Current radar imagery depicts isolated shower activity over the southeastern portions of the forecast area. Hi-Res guidance hints at some very light showers possibly pushing into the northern San Joaquin Valley this evening. QPF amounts should remain very light. Elsewhere, dry weather and mild temperatures continue. Highs on Thursday will be 5 to 10 degrees cooler compared to today as downslope winds decrease. Shower activity tapers off Friday as upper ridging increases over NorCal. Valley highs will reach the low to mid 70s by Friday, followed by low 70s to low 80s over the weekend. These forecast highs will be 5 to 10 degrees above climatology.


(Sunday THROUGH Wednesday)... To finish out the weekend, a broad upper ridge will extend over the east Pacific while heights begin to lower across the Intermountain West. Weak ascent in response to the passing trough could spark a few showers over the Sierra on Sunday. Otherwise, the ridge/trough configuration will foster a period of breezy northerly winds across the Valley which extends into Monday. The offshore ridge should gradually re-establish its presence over the region based on the latest global ensembles. This enforces additional warm, dry weather into next week. Daily high temperatures across the Delta and Valley will sit in the mid/upper 70s, locally into the low 80s over the northern Sacramento Valley. This is roughly 5 to 10 degrees above mid-April climatology. ~BRO

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