-- Discussion containing changed information from previous version are highlighted. --
357
FXUS66 KMTR 222324
AFDMTR

Area Forecast Discussion
National Weather Service San Francisco CA
424 PM PDT Sat Jun 22 2024

...New AVIATION, MARINE...

.SYNOPSIS...
Issued at 105 PM PDT Sat Jun 22 2024

Hot temperatures peak this afternoon with a Heat Advisory in effect
through the evening for the interior regions with a moderate risk of
heat-related illnesses. Temperatures moderate through the early part
of next week, but remain warm across the interior.

&&

.SHORT TERM...
(This evening through Sunday)
Issued at 105 PM PDT Sat Jun 22 2024

A Heat Advisory remains in effect until 10 PM across the interior
where temperatures are forecast to reach into the mid 90`s to near
105 degrees this afternoon. This will result in Moderate HeatRisk
across these areas with temperatures gradually cooling this evening.
This means that there is a risk of heat-related illnesses for most
people sensitive to heat, including children, the elderly, pregnant
women, those working or living outside, and those with certain
medical conditions. Here are heat safety tips:

* Stay hydrated and drink plenty of water.
* Wear lightweight, light-colored clothing.
* Reduce time spent outdoors or stay in the shade.
* Never leave people or pets unattended in vehicles.
* Use sunscreen if going to the coast or the pool.

Tonight, temperatures will generally cool into the mid-to-upper 50`s
for most locations away from the immediate coast with some upper
40`s in those locations. However, warm temperatures will persist
across the higher elevations where temperatures will only dip into
the upper 60`s to upper 70`s. Low clouds and/or fog will also return
to the region this evening, yet will penetrate less inland overnight
as high pressure continues to compresses the marine layer.

Temperatures on Sunday begin to cool slightly (especially across the
interior) as onshore flow increases and the marine layer deepens.
Thus, afternoon maximum temperatures on Sunday are expected to range
from the upper 80`s to mid 90`s across the interior with only
isolated pockets warming into the upper 90`s to near 100 degrees.
Cooler conditions will prevail near the coast with upper 50`s to
upper 60`s, 70`s just inland away from the immediate coastline, and
low-to-mid 70`s to low 80`s around the bayshore.

&&

.LONG TERM...
(Sunday night through next Friday)
Issued at 105 PM PDT Sat Jun 22 2024

An area of mid-to-upper level moisture will move northward into the
region on Tuesday resulting in increased mid/upper level clouds. We
will need to watch this for any potential for high-based convection,
yet the treat remains very low as this time. By late week,
temperatures trend cooler across the interior in response to an
upper level trough impacting the region with increased onshore flow.

The latest CPC outlook continues to suggest temperatures near or
above seasonal averages, and precipitation at or below seasonal
averages (noting that at this point in the year, seasonal average
precipitation is very low) continue into the first days of July.

&&

.AVIATION...
-- Changed Discussion --
(00Z TAFS)
Issued at 424 PM PDT Sat Jun 22 2024

Clear skies over the region with a few low clouds near the coast.
Low stratus will return tonight bring a mix of IFR and LIFR
conditions over the terminals. KSTS, KLVK, and KSJC are the only
terminals that seem to remain VFR ceilings through the TAF period.
KSTS may see some reduced visibility to MVFR criteria early
Sunday morning, but confidence is low. Any terminals that
experience status overnight, will see lifting to VFR near 16-18Z.
Moderate to breezy onshore winds will diminish to light tonight
before rebuilding to moderate to breezy Sunday morning.

Vicinity of SFO...VFR with a few low clouds over the terminal.
Confidence is moderate that IFR conditions will build early
Sunday morning as some models hint at VFR conditions through the
TAF period, but if ceilings lower, expect clearing near 16Z. Winds
diminish tonight but onshore winds will rebuild to 12-14 knots by
Sunday afternoon.

SFO Bridge Approach...Similar to SFO.

Monterey Bay Terminals...VFR until tonight where IFR/LIFR
conditions return. Expect clearing near 16-17Z with moderate
confidence on exact timing as KMRY may linger a bit longer.
-- End Changed Discussion --

&&

.MARINE...
-- Changed Discussion --
(Tonight through next Thursday)
Issued at 424 PM PDT Sat Jun 22 2024

  Strong, northwest winds with near gale force gusts possible
continue over the northern outer waters. Fresh gusts remain
possible over the southern outer waters and portions of the
northern interior coastal waters. Wave heights up to 10 feet  are
expected throughout the northern outer waters with  significant
wave heights diminishing below 10 feet by the middle  of the work
week. Conditions hazardous to small crafts remain  possible
through the middle of the work week across the northern  outer
waters. Light southerly swell and moderate NW swell continue over
the coastal waters through the beginning of next week.
-- End Changed Discussion --

&&

.MTR WATCHES/WARNINGS/ADVISORIES...
-- Changed Discussion --
CA...Heat Advisory until 10 PM PDT this evening for CAZ504-510-
     513>518.

PZ...Small Craft Advisory from 9 AM to 9 PM PDT Sunday for Pt Arena
     to Pt Reyes 0-10 nm.

     Small Craft Advisory until 9 AM PDT Monday for Pt Arena to Pt
     Reyes 10-60 NM.

     Small Craft Advisory until 9 PM PDT this evening for Pigeon Pt
     to Pt Pinos 10-60 NM.
-- End Changed Discussion --

&&

$$

SHORT TERM...RGass
LONG TERM....RGass
AVIATION...SO
MARINE...Kennedy

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