Sunrise 5:41 AM   Sunset 8:35 PM Moonrise 7:08 AM   Moonset 12:00 AM

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PZZ210 Columbia River Bar- 204 Pm Pdt Sat May 11 2024
In the main channel -
General seas - 4 to 6 ft through Sunday evening.
First ebb - Ebb current of 2.79 kt at 812 pm Saturday. Seas 6 ft.
SEcond ebb - Ebb current of 5.46 kt at 816 am Sunday. Seas 6 ft.
Third ebb - Ebb current of 2.44 kt at 906 pm Sunday. Seas 6 ft.

PZZ200 204 Pm Pdt Sat May 11 2024
Synopsis for the southern washington and northern oregon coast - High pressure will remain anchored offshore and maintain northerly breezes through the weekend. Thermal low pressure will remain well inland and over far south oregon coast into northwest california.

FXUS66 KPQR 112145 AFDPQR

Area Forecast Discussion National Weather Service Portland OR 245 PM PDT Sat May 11 2024

SYNOPSIS
A ridge of high pressure will remain overhead today, bringing another day of unseasonably warm temperatures to the area. Inland valley temperatures are expected to reach the upper 80s to low 90s today. Winds will become onshore throughout today as a shortwave trough moves east towards our region. The trough will move into our region Sunday, bringing cooler yet still above seasonal normal temperatures into early next week.

SHORT TERM
Now through Monday... The positively tilted ridge axis directly overhead begins to be pushed out of the region as a trough moves east across the northeast Pacific. Winds throughout the region, most noticeable along the coast, have shifted to onshore flow as the thermal trough in the Willamette Valley continues to move towards the Cascades. Low stratus has formed along the coast and is expected to persist today, thus expect moderated temperatures of upper 60s to low 70s. The Portland/Vancouver Metro may reach the 90s again, with a 30-50% chance of exceeding 90 degrees F. Tualatin Valley also has similar chances, with a 50-60% chance to exceed 90 degrees F for lowlands areas. The rest of the Willamette Valley has little (5% chance for urban areas) to no chance of reaching 90 today.

Widespread cooling is expected Sunday as the upper-level shortwave trough moves towards the coast. Expect Sunday highs around 60 along the coast and in the upper 70s to near 80 in the interior valleys. Monday will see the shortwave come onshore across the PNW which will drop temperatures even further as onshore flow increases. Highs along the coast will remain around 60 while interior valleys only peak around 70.

With such unseasonably warm temperatures for early Spring and coming out of cold weather, there is no doubt people will visit rivers, lakes, and the ocean for SW Washington and NW Oregon this weekend. It is important to remember that rivers and lakes remain dangerously cold with water temperatures mainly in the 40s and 50s. Such temperatures can easily cause cold water shock for those without proper cold water gear, resulting in an involuntary gasp of air that can lead to drowning. Be sure to bring a life vest and be extremely cautious around rivers, especially with snowmelt causing cold and swift currents! -JH

LONG TERM
Tuesday through Friday...WPC cluster analysis has moved more towards a solution favoring ridge re-development by the middle of next week. Nearly all ensemble members display relatively strong and broad ridging by Wednesday next week, allowing temperatures to climb to the upper 70s in the latter half of the week. Agreement lessens into Friday as there is a 20-30% chance of a trough developing and pushing south into the region. This trough would bring more seasonable temperatures and light rain showers back to the area, but there is still not enough model convergence to be certain. Cluster analysis looks to be at a 50/50 in terms of a ridge vs trough developing into early next weekend, with either a broad ridge remaining overhead or a shortwave trough moving into the region.
-JH/Batz

AVIATION
High pressure continues to promote clear skies VFR conditions across most of the region, with the exception of a narrow band of low stratus continuing to hug the Oregon Coast.
Visible satellite shows stratus mostly confined to the the beaches and immediate coastline as of 21z Sat, supporting VFR conditions from KAST to KTMK. However, stratus will likely continue to hinder KONP with LIFR conditions through the rest of the afternoon.
Expect stratus to redevelop and push back into coastal communities later this evening, bringing IFR back to KAST 03-06z Sun. Stratus will likely intrude farther into the coast range valleys tonight as onshore flow begins to increase, but the marine layer will remain too shallow to reach into the inland terminals during the period. Probabilistic guidance does show a 20-30 percent chance for IFR stratus to make it as far as KKLS in the north and KEUG in the south after 12z Sun. Otherwise, expect clear sky VFR conditions to prevail through the period at all inland sites.
Winds pick up to 8-10 kt out of the NW this afternoon as onshore flow increases a bit, decreasing back below 5 kt after sunset.

PDX AND APPROACHES...Unrestricted VFR through the period as high pressure continues to promote clear skies. Winds increasing to 8-10 kt out of the NW 22z Sat to 04z Sun as onshore flow picks up a bit. /CB

MARINE
A summerlike pattern will persist through early next week as high pressure offshore and thermal low pressure shifting farther inland maintain moderate to strong northerly breezes for the next several days. Gradients have tightened just enough to allow winds to gust to 25 kt across the waters this afternoon, supporting low end Small Craft Advisories through late this evening. Winds will continue to follow a diurnal trend for the next few days, with additional rounds of small craft headlines possible each afternoon and evening. Seas will generally remain in the 4-6 ft range driven by northerly wind waves and a modest westerly swell. /CB

PQR WATCHES/WARNINGS/ADVISORIES

OR...None.
WA...None.
PZ...Small Craft Advisory until midnight PDT tonight for PZZ251>253- 271>273.

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Harrington Point
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Sat -- 12:24 AM PDT     Moonset
Sat -- 03:56 AM PDT     8.18 feet High Tide
Sat -- 05:45 AM PDT     Sunrise
Sat -- 08:08 AM PDT     Moonrise
Sat -- 11:48 AM PDT     -1.29 feet Low Tide
Sat -- 05:53 PM PDT     6.11 feet High Tide
Sat -- 08:36 PM PDT     Sunset
Sat -- 11:33 PM PDT     2.99 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Harrington Point, Columbia River, Washington, Tide feet

Knappa
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Sat -- 12:23 AM PDT     Moonset
Sat -- 04:04 AM PDT     8.71 feet High Tide
Sat -- 05:45 AM PDT     Sunrise
Sat -- 08:08 AM PDT     Moonrise
Sat -- 11:54 AM PDT     -0.94 feet Low Tide
Sat -- 06:01 PM PDT     6.70 feet High Tide
Sat -- 08:36 PM PDT     Sunset
Sat -- 11:39 PM PDT     2.74 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION

Knappa, Knappa Slough, Columbia River, Oregon, Tide feet

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