Marine Weather and Tide Forecast for Onalaska, WA

SYNOPSIS
Cooler and damp conditions expected for the start of the week before warmer temperatures return by Wednesday and Thursday. Precipitation chances return to the forecast by Friday into next weekend.

SHORT TERM /TODAY THROUGH WEDNESDAY/
Widespread stratus is apparent on satellite early this morning thanks to continued onshore flow. A weak frontal system is still expected to drop into western Washington from the north later this evening, bringing light rain and through Tuesday morning. Light rain accumulations are expected, as well as high snow levels above 5,000 to 6,000 feet. Today is likely going to be the coolest day of the week, with highs in the upper 50s. Beyond Tuesday morning, expect some lingering showers in the Cascades, but generally drying conditions elsewhere.

An upper level ridge returns to the PNW by Wednesday, beginning a warming trend. Temperatures will climb into the mid to upper 60s, setting the stage for a warmer day still on Thursday.

LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/
Absolutely pleasant temperatures are expected on Thursday as highs climb into the upper 70s for much of Puget Sound and surrounding Cascade Valleys. Even coastal locations will reach the upper 60s. Low 80s are expected in the southwest interior. Enjoy it, as temperatures will moderate somewhat into the upper 60s and low 70s on Friday as increased onshore flow resumes with the ridge moving east. This will allow the next frontal system to move into western Washington on Friday into Saturday. Exact track of the low will have implications on how much precipitation the region receives, but at this point in the forecast cycle, the forecast calls for the bulk of the rain to fall in the Cascades and northern Olympic coast.

21

AVIATION
Upper level ridge moving east this morning. Frontal system approaching from the northwest moving through Tuesday.
Northwesterly flow aloft becoming westerly this morning. In the lower levels, south to southwesterly flow will persist through the TAF period.

Widespread MVFR ceilings this morning. Improving trend this afternoon over the interior with ceilings becoming VFR 21z-00z.
Ceilings remaining MVFR along the coast. MVFR ceilings returning to the interior after 08z and through much of Tuesday morning as the front moves through.

KSEA.. MVFR ceilings becoming VFR 21z-00z. MVFR ceilings redeveloping 09z-12z. Light southerly winds 09z-16z, 4 to 8 knots 16z-21z and 03z-12z, 8 to 12 knots 21z-03z. Wind shift to N at after 21Z Tuesday as a push down the Strait of Juan de Fuca rounds the corner and moves south towards the terminal.

Felton/62

MARINE
High pressure over the waters will weaken today. A weak frontal system will move across the waters tonight into Tuesday.
High pressure will rebuild Wednesday and remain into Thursday.
Another front arrives Friday.

Westerly winds in the Central and Eastern Strait will ease this morning. Small craft advisory westerlies again in the Central and Eastern Strait Tuesday night.

Choppy seas over the outer coastal waters ending this morning.
Seas below 10 feet through the week with the seas peaking in the 7 or 8 foot range late in the week. Felton

HYDROLOGY
No river flooding is expected over the next 7 days.

SEW WATCHES/WARNINGS/ADVISORIES
WA...None.
PZ...Small Craft Advisory from 6 PM Tuesday to 5 AM PDT Wednesday for Central U.S. Waters Strait Of Juan De Fuca-East Entrance U.S. Waters Strait Of Juan De Fuca.