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Area Forecast Discussion (AFD)

Issued by Sacramento, CA (STO)

FXUS66 KSTO 202040

Area Forecast Discussion
National Weather Service Sacramento CA
140 PM PDT Sat Apr 20 2019

Showers and thunderstorms are forecast into the evening as a low 
pressure system moves inland. Temperatures will become 
significantly warmer next week with a warming trend starting 
Sunday and lasting through the middle of next week. 


Showers and isolated thunderstorms are expected to increase this
afternoon particularly between 3 and 6 pm. The low pressure area
over the region will move east tonight into Nevada. Thunderstorms
should end early in the evening as models indicate stability
increasing rapidly this evening. That said some showers may linger
overnight in the mountains and foothills as moisture wraps around
the back side of the low.

The low will be centered over central Nevada on Sunday and a few 
showers may pop up in the afternoon south of highway 88 along the
crest. Northerly flow over the interior on Sunday will help to 
warm temperatures well into the 70s for the valley with some lower
80s for some of the warmer spots, while the mountains will warm 
into the 50s and 60s. Breezy northerly winds the next couple of 
days in the valley as high pressure builds and temperatures warm 
each day. By Tuesday expect to see temperatures around 15 degrees 
above seasonal normals. 



Upper ridge axis begins to shift east Wednesday, allowing for a
few weak disturbances to bring small precipitation chances mainly
confined to the northern portion of the state Thursday night
through Friday night. Have kept thunderstorm chances in this area
for Thursday evening, and again Friday afternoon as models allude
to there being enough instability in the area. High temperatures
near the 90s Wednesday will decrease to the low 80s by the
beginning of the weekend.


Pacific frontal system will track across Norcal today bringing
showers and isolated thunderstorms north and east of Sacramento.
Mainly VFR conditions at sites. Winds generally below 15 knots 
except in vicinity of thunderstorms.