Friday, March5, 2021
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Marine Weather and Tides
Kalama, WA

Version 3.4
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1/26/2021 -- The West Coast Satellite images havd been updated. They now use GEOS-17.
1/1/2021 -- The 7 day forecast are now working well. Thank you NOAA for your support.

Sunrise 6:40AMSunset 6:05PM Friday March 5, 2021 12:01 PM PST (20:01 UTC) Moonrise 1:08AMMoonset 10:17AM Illumination 54% Phase: Third Quarter Moon; Moon at 22 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ210 Columbia River Bar- 913 Am Pst Fri Mar 5 2021
.small craft advisory in effect through Saturday afternoon...
In the main channel.. - general seas...seas 14 to 17 ft Friday morning, gradually subsiding to 11 to 13 ft Friday afternoon. - first ebb...around 930 am Friday. Seas near 19 ft with breakers likely. - second ebb...around 1000 pm Friday. Seas near 16 ft with breakers possible. - third ebb...around 1030 am Saturday. Seas near 14 ft with breakers likely.
PZZ200 913 Am Pst Fri Mar 5 2021
Synopsis for the southern washington and northern oregon coast.. A strong cold front over the coastal waters will continue to slowly push inland today. Weak high pressure develops over the area tonight and Saturday. Another frontal system is expected to move through the waters Saturday night. Unsettled weather continues into early next week, as low pressure well offshore drops southeastward towards california.


7 Day Forecast for Marine Location Near Kalama, WA
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location: 46, -122.85     debug


Area Discussion for - Portland, OR
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FXUS66 KPQR 051916 CCA AFDPQR

Area Forecast Discussion . CORRECTION National Weather Service Portland OR 1116 AM PST Fri Mar 5 2021

Updated aviation discussion. Corrected for advisories and warnings.

SYNOPSIS. A rather complex system continues to slowly move inland today as the overall system weakens. Another front arrives Sunday, also weakening as it comes onshore. Generally speaking, the coast will receive the bulk of precipitation while the Cascades receives far less. Low pressure slowly slides south while centered well offshore to bring some form of rain and snow for much of next week.

SHORT TERM. Today through Sunday Night . The upper front, which has stalled a bit further west than was expected 24 hours ago, is starting to move back onshore this morning. The further west position has resulted in rather meager rain amounts as compared to what was expected by previous shifts. As of this forecast package QPF storm totals are running about half of the -24 hr forecast. Given this, any flooding concerns there were for the Grays and Nehalem rivers are long gone.

The leading edge of rain will cross over the Willamette Valley close to daybreak which will help break up the patchy fog which has developed under the clearer to start skies from the last several hours. Expect rain to be more on than off today until the back edge of the front crosses this afternoon and for the Cascades, this evening. Will be curious to see how much shadowing influence comes into play from the southerly flow intersecting the Siskiyous and the Umpqua divide to our south. Already diminished QPF amounts may still be overdone. Will get a few inches of snow for the Cascades with the Mt St Helens region likely picking up several inches under the more favorable southerly flow, but still staying below advisory criteria. Additionally with this front, will get some breezy to borderline windy conditions at the coast this morning as smaller scale impulses move north along the front. Gusts 35-45 are most likely for the more exposed beached and headlands. Cannot rule out the occasional gust around 50 mph this morning.

Also along the beaches, incoming westerly and longer period swells will increase the chance of sneaker waves today. Additionally, very small tsunami waves have begun to arrive at the coast early this morning. Although they will have some influence, the primary sneaker wave threat will be from distant storms and not necessarily from the earthquakes off the northern New Zealand.

Temperatures over the next few days will stay a few degrees below normal. Saturday will remain showery under a modestly unstable air mass. May get some small hail embedded in the showers. Showers taper off near sunset Saturday evening and then another front will cross the region late Saturday night and early Sunday morning. This front will also likely end up weaker and splitting to result in what may be perceived more as showers in the morning. The front, or what's left of it, does move east rather quickly leaving Sunday afternoon more convective. Sunday's showers may have a bit more strength to them as the colder air mass from the broader upper low does move overhead. Thunderstorm chances are low and below a mentionable 15%, however, they are not completely zero. Should surface Ts run a couple degrees higher than expected, then a sub 15% thunder threat might bump up closer to 25-35%. /JBonk

LONG TERM. Monday through Thursday . Another large upper low will work southeastward from the Bering Sea over the weekend to take up residence between 130 and 140 W off the PacNW coast. This system will then further drop south and then southeast during the several day period of the long-term forecast. As it does so, there will be opportunities for short-waves to rotate around the base of the upper low and bring rain chances every day through Tuesday. Wednesday and Thursday have the best chances for staying dry albeit with temperatures remaining somewhat below normal. As of now, do not expect any significant snowfall for the Cascades, but at least what does fall will likely remain snow, especially across the passes and higher. /JBonk

AVIATION. A strong cold front continues to push inland today bringing rainfall and marine stratus along with it. Along the coast, conditions are beginning to lift just slightly going from MVFR cigs to now VFR and winds are easing. Still expecting southerly and gusty at times winds, but, behind the cold front clear skies are observed. Because the front was stalled along the coast and waters this morning, conditions have been slow to pick up inland and really have started as the front is weakening. Decided to take out the mention of gusts in the TAFs as it does not appear that the chance is as high, especially through the Willamette Valley. Cannot rule out the chance, but confidence is lower. If they do occur, will likely remain at or below 25 kt. Expecting persistent conditions through the next 24 hours with little change.

For detailed regional Pac NW aviation weather information, go online to: https://weather.gov/zse

KPDX AND APPROACHES . VFR through much of the day with southerly winds. Expecting rain becoming showery through the evening hours. Could see some lowering of CIGs to MVFR at times with heavier rain especially but should stay 2000-3000 ft if they do lower. -Muessle

MARINE. Buoy observations early Friday morning showed significant wave heights around 20 ft across the outer waters, and around 15-16 ft over the inner waters. Combined seas were resulting from a combination of a fresh southerly swell and a long period westerly swell. In addition, a strong cold front was located over the inner waters, which should begin to push inland just before sunrise. This front has brought gusty southerly winds, with buoy observations continuing to show gusts in the 40-45 kt range. By late morning, winds should fall into the 25-34 kt range while combined seas begin to decline into the mid teens. Therefore, it is likely that the Gale Warning will be replaced by a Small Craft Advisory by late this morning. That said, a few gusts to 35 kt cannot be ruled out late this afternoon to the north of Tillamook Head beyond 30 nautical miles.

Expect winds to decrease significantly tonight, falling below 20 kt by late tonight. Despite the weakening winds, seas look to stay elevated in the low to mid teens. It is not until Saturday afternoon that seas should fall to around 10-11 ft. Southerly winds increase again Saturday evening as the next frontal system moves over the waters. At this time, a brief period of gusts between 30-35 kt appear likely with the front.

Westerly swell begins to increase again on Sunday, with guidance suggesting a peak around 18-21 ft by the late afternoon. With a dominant period around 16-17 seconds, this will bring a high sneaker wave threat to local beaches and will also bring the potential for high surf. Expect both seas and winds to improve significantly early next week. -TK

PQR WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None. PZ . Small Craft Advisory until 10 PM PST Saturday for coastal waters from Cape Shoalwater WA to Florence OR out 60 NM.

Small Craft Advisory until 1 PM PST Saturday for Columbia River Bar.



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Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
LOPW1 - 9440422 - Longview, WA 9 mi44 min 43°F1015.7 hPa
ASTO3 - 9439040 - Astoria, OR 51 mi44 min S 12 G 17 50°F 44°F1014.3 hPa
TLBO3 - 9437540 - Garibaldi, Tillamook Bay, OR 64 mi44 min 1015.6 hPa

Wind History for Longview, WA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Washington Regional Airport, WA9 mi66 minSSE 13 G 1910.00 miMostly Cloudy50°F44°F80%1015.6 hPa
Scappoose Industrial Airpark, OR16 mi69 minSE 810.00 miLight Rain50°F46°F86%1015.8 hPa

Link to 5 minute data for KKLS

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Tide / Current Tables for Vancouver, Columbia River, Washington (dubious accuracy)
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Vancouver
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Fri -- 01:05 AM PST     Moonrise
Fri -- 03:36 AM PST     0.74 feet Low Tide
Fri -- 04:44 AM PST     0.76 feet High Tide
Fri -- 06:41 AM PST     Sunrise
Fri -- 07:09 AM PST     0.60 feet Low Tide
Fri -- 10:18 AM PST     Moonset
Fri -- 11:40 AM PST     1.99 feet High Tide
Fri -- 05:32 PM PST     Last Quarter
Fri -- 06:03 PM PST     Sunset
Fri -- 08:13 PM PST     0.04 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.41.20.90.80.70.80.70.60.711.51.921.71.30.90.70.60.50.20.10.10.50.9

Tide / Current Tables for Knappa, Knappa Slough, Columbia River, Oregon
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Knappa
Click for Map
Fri -- 12:11 AM PST     1.86 feet Low Tide
Fri -- 01:11 AM PST     Moonrise
Fri -- 05:52 AM PST     8.71 feet High Tide
Fri -- 06:45 AM PST     Sunrise
Fri -- 10:19 AM PST     Moonset
Fri -- 01:34 PM PST     0.37 feet Low Tide
Fri -- 05:32 PM PST     Last Quarter
Fri -- 06:06 PM PST     Sunset
Fri -- 07:30 PM PST     6.10 feet High Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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1.92.23.45.27.18.38.78.27.15.53.82.31.10.50.51.22.645.3665.44.53.6

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NOTE: This section has been updated as of 1/26/2021. If the image you are expecting is not showing, please let me know. You may use the EDIT function to update your location.
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