FXUS66 KSTO 082104
AFDSTO
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.
.EXTENDED DISCUSSION
(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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