Coos Bay, OR Marine Weather and Tide Forecast
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Marine Weather and Tide Forecast for Coos Bay, OR


November 30, 2023 8:31 PM PST (04:31 UTC)
Sunrise 7:26AM   Sunset 4:44PM   Moonrise  7:33PM   Moonset 11:00AM 

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. Privacy and Cookie policy

Marine Forecasts
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PZZ350 Coastal Waters From Florence To Cape Blanco Or Out 10 Nm- 205 Pm Pst Thu Nov 30 2023
.small craft advisory in effect until 10 pm pst this evening...
.hazardous seas warning in effect from 10 pm pst this evening through Friday afternoon...
Tonight..W wind 10 to 15 kt...backing to sw 10 to 20 kt until early morning, then...rising to 15 to 25 kt late tonight. Wind waves nw 4 ft at 6 seconds. W swell 6 to 8 ft at 12 seconds... Building to 9 to 10 ft at 12 seconds after midnight. SWell and sw 1 ft after midnight. Chance of showers.
Fri..SW wind 30 kt...becoming W 10 to 20 kt in the afternoon. Wind waves W 6 ft at 7 seconds. SWell W 10 to 11 ft at 11 seconds. Showers.
Fri night..SW wind 10 to 20 kt...backing to S 15 to 25 kt after midnight. Wind waves sw 5 ft at 6 seconds. SWell W 10 to 11 ft at 12 seconds. Showers in the evening, then rain after midnight.
Sat..SW wind 15 to 20 kt. Wind waves W 5 ft at 7 seconds. SWell W 11 to 12 ft at 12 seconds. Rain.
Sat night..S wind 30 kt. Wind waves sw 6 ft at 5 secondswind waves W 11 ft at 7 seconds after midnight. SWell W 12 ft at 14 seconds. Rain.
Sun..S wind 30 kt. Wind waves W 12 ft at 9 seconds. SWell W 12 to 14 ft at 13 seconds. Rain.
Sun night..S wind 30 kt...easing to 20 to 25 kt after midnight. Wind waves sw 12 ft at 9 seconds. SWell W 11 to 12 ft at 12 seconds. Rain.
Mon..S wind 25 kt. Wind waves S 7 ft at 7 seconds. SWell W 14 ft at 13 seconds...subsiding to W 11 ft at 13 seconds.
Tue..S wind 25 kt...easing to 15 to 20 kt. Wind waves S 4 ft at 6 seconds. SWell W 10 ft at 13 seconds...building to W 18 ft at 17 seconds.

PZZ300 205 Pm Pst Thu Nov 30 2023
Synopsis for the southern oregon coastal waters..Active weather will persist into next week. Multiple fronts and swell trains will pass through the region during this time, resulting in steep to very steep seas and periods of strong south winds. Hazardous to small craft conditions have spread across the waters and very steep warning level seas north of port orford will follow late tonight through Friday due to large swell and wind seas. The strongest of these systems is likely to affect the waters early Sunday through Monday.


7 Day Forecast for Marine Location Near Coos Bay, OR
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Area Discussion for - Medford, OR
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FXUS66 KMFR 010006 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 255 PM PST Thu Nov 30 2023

Updated AVIATION discussion

SHORT TERM

The first round of snow is through the region with the cold front pushing through the Cascades at this time. Precipitation mode has become more showery along the coast and west of the Cascades. The sun even broke out for a brief time here at the office. There is cooler air moving in behind this front and the latest forecast has snow levels down to about 3500 feet.

By Friday morning, we'll see the next shot of rain and snow over Oregon and northern California. The NBM is still predicting a significant snow event over the higher Cascades with 1 foot of snow falling over Crater Lake on Friday, although GFS and ECMWF seem to have pivoted the moisture farther north than previous runs. Friday is the most significant day as snow levels are still relatively low around 4000 feet, so more roadways and locations will be impacted by the snow. The overall dynamics with strong westerly 45 knot flow around 4500 feet fit the pattern for a Cascades Snow event. However, it's entirely possible snow totals come in lower than previously anticipated 24 hours ago.

In any case, a warm front is anticipated to push in sometime Saturday morning, which will increase the snow levels around 4000 to 4500 feet up to 5500 to 6000 feet. A second warm front is anticipated to arrive shortly after around Saturday evening as snow levels shoot up to 7000 feet. The overall snowfall totals are around 30 inches near Crater Lake with about 7 inches over Lake of the Woods. The lower totals near Lake of the Woods show how the rising snow levels really dampen values there. In addition, the axis of all this moisture is really situated farther to the north near Crater Lake and areas within Portland forecast region.
Also, with such strong west flow, the Siskiyous, Siskiyou Pass and Mt. Ashland will really miss out on a lot of the snow as we're forecasting 4 to perhaps 6 inches in those locations. The warmer air arriving Sunday could really dampen what ends up falling.

As for locations east of the Cascades, snow is really dampened there too. The Warners will see some snow with Warner and Cedar Pass seeing up to 4 inches over 48 hours. We ended up issuing a winter storm warning for the northern sections of Klamath County because that area along 97 always seems to see problems during these heavier Cascade Snow events.

The potential for flooding in our region remains low between now and early Sunday. The main reason for this is rivers are already incredibly low and it seem areas to our north will really feel the brunt of this atmospheric river and those to follow.

Lastly, wind was on our radar and we ended up issuing a wind advisory east of the Cascades in zone 31. Summer Lake and much of eastern Lake County have a good chance to see wind gusts around 45 to 50 mph around Friday afternoon to Saturday afternoon with Saturday looking the better of th two. Winds around 700 mb are solidly around 45 to 50 knots and the atmosphere looks fairly well mixed east of the Cascades. We did consider a winter weather advisory instead, although the areas impacted by snow are very remote.

-Smith

LONG TERM
Sunday (12/3) through Thursday (12/7)...The active pattern will continue into the extended period. There is some wide variation across the model suites regarding the timing and nature of the individual systems. There has been a trend towards a somewhat drier forecast for portions of the extended term within the deterministic GFS/EC and many of the member runs. As typical, it appears the NBM is lagging behind in this trend, so it still maintains a hefty chance of rain throughout the extended. It is difficult to illustrate this given the current state of the forecast process, and therefore the forecast products still suggest that there is a constant threat of precipitation. However, we are fairly confident that there will be a roughly 24 hour break in the action Monday. Hopefully the timing details will become clearer over the next several forecast cycles.

The most likely scenario will be for us to see a brief lull early Sunday morning as the Saturday system exits and the next system approaches from offshore. We will still see a general westerly flow aloft, and this typically gives us good upslope precipitation production, especially along the coats and the western slopes of the Cascades. This next system then moves onshore during the day Sunday, but the model solutions are trending the bulk of the system farther north, mainly due to the difficulty of the upper level trough to dig into the larger ridge lying over and just offshore of California.
The trailing edge of the surface front should still bring us a precipitation and winds, but the bulk of the moisture transport and dynamics will keep to the north, more towards Portland and Washington.

The trough exits and the ridge attempts to build back over southern Oregon Sunday night into Monday. This is where things should trend drier than previously thought, though the chance for showers does not completely end (due to some overrunning along a warm front)
before the next system arrives Tuesday into Wednesday, with more rain and wind.

Fortunately for travel concerns, snow levels are expected to remain well above 5000 feet for the vast majority of the extended period, so winter impacts will be minimal. We will have to keep an eye on hydrological concerns, however, as despite the lack of any one period of heavy rain, the quick successive storms could add up, leading to rises on area rivers and streams. -BPN



AVIATION
01/00Z TAFs...Scattered showers continue to move eastward across northern California and southern Oregon. Current observations show VFR ceilings across most of the area and VFR levels are expected to persist through the evening for most areas.
There is a chance of MVFR ceilings in the Umpqua Valley overnight and into early Friday morning.

The next wave of activity is expected to arrive early Friday morning, which could bring periods of MVFR ceilings and visibilities to west side valleys. While widespread rain showers are expected for areas west of the Cascades, snow levels of 3500-4000 will limit any snow showers to higher terrain and the Cascades themselves. Snow showers are widely expected across areas east of the Cascades, but with higher amounts limited to higher terrain. These rain and snow showers can locally lower ceilings and visibility, and extra caution is encouraged. -TAD

MARINE
Updated 200 PM Thursday November 30, 2023...Active weather will persist well into next week with multiple fronts expected to pass through the region. Hazardous to small craft conditions continue through this evening.

Seas will continue to build tonight with a steep northwest swell between 11 and 12 feet across the waters. When a strong front moves through Friday, gusty south winds will combine with the existing swell to increase the steepness and chaotic-ness of the seas. This will lead to a period of steep to very steep seas late tonight into Friday afternoon. The steepest seas are expected north of Port Orford where the strongest winds are expected. Gale force gusts are possible north of Cape Blanco with the frontal passage Friday afternoon.

The northwest swell will rebuild Saturday and grow through Sunday.
Meanwhile, another front will pass through the region bringing another round of wind seas.

The strongest of these systems is likely to affect the waters early Sunday through Monday, with gales possible north of Cape Blanco.
Seas will peak Sunday afternoon at around 14 to 17 ft, which would make bar crossings increasingly more hazardous. Sea conditions are likely to remain high and steep or very steep through Thursday.
Future observations will help to determine the timing and level of additional hazards. -BR-y/Hermansen

BEACH HAZARDS
Active weather continues well into next week. A series of fronts will move through the region during this time along with multiple moderate swell trains. An extended period of sustained wave action is expected. Breaking waves of 15 to 20 ft will coincide with higher than normal ocean levels, leading to an increased risk of beach erosion. Additionally, there is a minor risk of sneaker waves as these swell trains build into the waters. Confidence is low, however, considering wind wave interference is likely to limit, but not completely negate the sneaker threat. If venturing to area beaches during this time, use caution when visiting and remember to never turn your back on the ocean! /BR-y/Hermansen



MFR WATCHES/WARNINGS/ADVISORIES
OR...Beach Hazards Statement from late Friday night through late Monday night for ORZ021-022.

Winter Weather Advisory until 4 AM PST Friday above 3500 feet for ORZ025.

Winter Storm Warning from 4 AM Friday to 4 AM PST Saturday above 4000 feet for ORZ025.

Winter Weather Advisory until 4 AM PST Friday above 4000 feet for ORZ027-028.

Winter Storm Warning from 4 AM Friday to 10 PM PST Saturday above 5500 feet for ORZ027-028.

Winter Weather Advisory from 4 AM Friday to 10 AM PST Saturday above 4000 feet for ORZ029.

Winter Storm Warning from 4 AM Friday to 10 AM PST Saturday above 4500 feet for ORZ030.

Wind Advisory from 10 AM Friday to 4 AM PST Sunday for ORZ031.

CA...None.

PACIFIC COASTAL WATERS...Small Craft Advisory until 4 PM PST Friday for PZZ356-376.

Small Craft Advisory until 10 PM PST this evening for PZZ350- 370.

Hazardous Seas Warning from 10 PM this evening to 4 PM PST Friday for PZZ350-370-376.


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesinHgDewPt
CHAO3 - 9432780 - Charleston, OR 7 mi55 min SE 1G4.1 29.96
SNTO3 9 mi61 min 0 45°F 29.9845°F
46229 - UMPQUA OFFSHORE, OR (139) 32 mi35 min 55°F7 ft
PORO3 - 9431647 - Port Orford, OR 47 mi61 min WNW 2.9G5.1 50°F 53°F30.00

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Wind History for Port Orford, OR
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Airport Reports
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AirportDistAgeWind ktVisSkyWeatherTempDewPtRHinHg
KOTH SOUTHWEST OREGON RGNL,OR 3 sm35 minSE 075 smOvercast Rain Mist 45°F45°F100%29.97

Wind History from OTH
(wind in knots)


Tide / Current for Charleston, Oregon
   
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Charleston
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Thu -- 02:33 AM PST     6.71 feet High Tide
Thu -- 07:28 AM PST     Sunrise
Thu -- 07:32 AM PST     3.83 feet Low Tide
Thu -- 11:01 AM PST     Moonset
Thu -- 01:16 PM PST     8.05 feet High Tide
Thu -- 04:42 PM PST     Sunset
Thu -- 07:32 PM PST     Moonrise
Thu -- 08:26 PM PST     -0.55 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston, Oregon, Tide feet
12
am
4.5
1
am
5.9
2
am
6.6
3
am
6.6
4
am
6.1
5
am
5.3
6
am
4.4
7
am
3.9
8
am
3.9
9
am
4.4
10
am
5.4
11
am
6.5
12
pm
7.5
1
pm
8
2
pm
7.9
3
pm
6.9
4
pm
5.4
5
pm
3.6
6
pm
1.7
7
pm
0.3
8
pm
-0.5
9
pm
-0.4
10
pm
0.4
11
pm
1.8



Tide / Current for Charleston, Oregon (2)
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Charleston
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Thu -- 02:39 AM PST     6.54 feet High Tide
Thu -- 07:22 AM PST     3.87 feet Low Tide
Thu -- 07:28 AM PST     Sunrise
Thu -- 11:01 AM PST     Moonset
Thu -- 01:03 PM PST     8.00 feet High Tide
Thu -- 04:42 PM PST     Sunset
Thu -- 07:32 PM PST     Moonrise
Thu -- 08:23 PM PST     -0.54 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

Charleston, Oregon (2), Tide feet
12
am
4.4
1
am
5.7
2
am
6.4
3
am
6.5
4
am
6
5
am
5.2
6
am
4.4
7
am
3.9
8
am
4
9
am
4.6
10
am
5.6
11
am
6.7
12
pm
7.6
1
pm
8
2
pm
7.7
3
pm
6.7
4
pm
5.2
5
pm
3.3
6
pm
1.6
7
pm
0.2
8
pm
-0.5
9
pm
-0.4
10
pm
0.4
11
pm
1.7




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Medford, OR,



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