Area Forecast Discussion
Issued by NWS Sacramento, CA
FXUS66 KSTO 270956
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SACRAMENTO CA
256 AM PDT Mon Apr 27 2015
High pressure will bring dry weather and above normal temperatures
to the area through the week.
Ridge axis will shift east across the state and into the Great
Basin today into Tuesday. As heights continue to increase, expect
temperatures today to max out about 7-10 degrees warmer than
Sunday with some spots in the valley likely reaching the 90 degree
mark. Pressure gradient will relax some which should allow for
lighter northerly flow than Sunday, although winds will remain breezy
in some spots along the Sierra and western central Valley.
Weak trough will approach the coast on Tuesday and across the
Wednesday into early Thursday. As previously advertised, moisture
will be starved and any precip should remain removed to the north,
mainly across Washington & Oregon. Tangible effect of this trough
will be a few more clouds and more of an onshore flow. This should
allow for decent delta breeze to develop. Temperatures may cool a few
degrees but will remain much above normal for this time of year.
More noticeable cooling for areas directly impacted by delta
breeze though. Trough moves east Thursday with a return to high
temperatures near 90 in the valley and 60s-70s in the mountains.
.Extended Discussion (Friday through Monday)
The general consensus in the extended period is for a weak upper
trough to remain over the region with a very weak closed low off
the coast of central California. If this solution pans out, warm
temperatures are likely to continue into next weekend. The pattern
would favor a Delta Breeze, but would likely bring cooling only
to areas immediately adjacent to the Delta. The pattern would also
be favorable for isolated diurnal showers and thunderstorms over
VFR conditions expected across interior NorCal the next 24 hours.
Northerly 10-20 kts with local gusts around 25 kts in the Central
Valley will be possible through about 00Z Tuesday. Over the
northern Sierra, local northeast wind gusts 25-35 kts possible
today, decreasing in the afternoon.