Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA
FXUS66 KHNX 271044
Area Forecast Discussion
National Weather Service San Joaquin Valley - Hanford CA
344 AM PDT Mon Mar 27 2017
.SYNOPSIS...A few showers will be present this morning into the
early afternoon hours along with breezy conditions late this
afternoon into the evening hours. After today...dry weather and a
warming trend take hold of central California through midweek.
Another chance for precipitation over mainly the mountains on
Thursday before a return to dry weather through the end of the
.DISCUSSION...An upper trough is currently moving east through
central California this morning. This disturbance was accompanied
with showers...which are currently confined to areas north of Kern
county. The high res models are in good agreement that showers
will continue to push south and east into Kern county and over the
Sierra Nevada through mid to late morning...with showers lingering
near the Grapevine this afternoon.
Accumulation has been light with these showers...with most valley
locations picking up just a few hundredth of an inch of rain. The
Sierra Nevada and surrounding foothills have picked up a bit
more...generally around a tenth of an inch. Mariposa has picked up
the most rain in the past 6 hours...with 0.31 inches.
Snow levels are hovering between 6500 and 7000 feet with just
dusting to a few inches forecast above the snow line through the
Otherwise...the big weather story of the day will be the strong
winds across the desert...as well as the north and west side of
the San Joaquin Valley. Surface high pressure will continue to
build over the eastern Pacific while surface low pressure remains
dominant over the desert southwest. Surface pressure gradients
will continue to strengthen...with the tightest gradients present
this afternoon into the early evening hours. The desert as well as
the Kern county mountains will see wind gusts in excess of 60
mph...with a few of the typically windy spots experiencing wind
gusts to 75 mph. In the past 6 hours...Cache Creek as well as the
Mojave airport experienced wind gusts at or over 55 mph. As far as
the west and north side of the San Joaquin Valley...wind gusts
between 35 and 50 mph will be possible during the afternoon hours.
Upper level high pressure will begin to build over southern and
central California Tuesday into Wednesday resulting in dry weather
and a warming trend. Temperatures on Wednesday will be between 5
and 8 degrees above normal for the end of March.
An upper low will dig south from British Colombia into Washington
on Thursday morning and into Nevada by Thursday afternoon. The
trajectory of this upper low...mainly south southwest through
Nevada...generally provides showers to the Sierra Nevada...keeping
the rest of the area dry. The best chance for Sierra Nevada
precipitation will be on Thursday. Snow levels will be around 8000
feet during the bulk of the precipitation...lowing to around 6500
feet in the evening with the few lingering showers.
High pressure will once again build over the area Friday through
the weekend with dry weather and another warming trend. A few San
Joaqin Valley locations will nudge toward the 80 degree mark on
Sunday...around 10 degrees above normal.
In the San Joaquin Valley, areas of MVFR ceilings in low clouds and
showers thru 18Z today. In the Southern Sierra Nevada and adjacent
foothills, areas of MVFR and local mountain obscuring IFR in low
clouds and showers thru 21Z today. In the Tehachapi Mountains, areas
of MVFR and local mountain obscuring IFR in low clouds and showers
thru 06Z Tue and wind gusts above 50KT possible thru 06Z Tue. Across
the Kern County Deserts, wind gusts above 50KT possible thru 06Z Tue.
Otherwise, VFR conditions can be expected across the central CA
interior for the next 24 hours.
.AIR QUALITY ISSUES...
The level of certainty for days 1 and 2 is high.
The level of certainty for days 3 through 7 is medium.
Certainty levels include low...medium...and high. Please visit
www.weather.gov/hnx/certainty.php for additional information
an/or to provide feedback.
High Wind Warning from 8 AM this morning to 11 PM PDT this
Wind Advisory from 11 AM this morning to 8 PM PDT this evening