Friday, August7, 2020
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Marine Weather and Tides
Yoncalla, OR

Version 3.4
NOTICE
12/16/2019 NOAA is having trouble with requests that include wind gusts. I am posting graphs without wind gusts until it gets fixed.
10/9/2019 Updated the Marine Zones.
9/4/2019 Fixed the weather maps due to NOAA moving them.
7/25/2019 New feature in the Airports section gives a link to 5 minute updates for data reports.

Sunrise 6:09AMSunset 8:28PM Friday August 7, 2020 12:07 PM PDT (19:07 UTC) Moonrise 9:49PMMoonset 9:07AM Illumination 85% Phase: Waning Gibbous; Moon at 18 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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PZZ350 Coastal Waters From Florence To Cape Blanco Or Out 10 Nm- 803 Am Pdt Fri Aug 7 2020
.small craft advisory in effect from 5 pm pdt this afternoon through Monday evening...
Today..N wind 10 to 20 kt. Wind waves 3 to 4 ft. NW swell 5 ft at 11 seconds.
Tonight..N wind 10 to 20 kt. Wind waves 3 to 4 ft. NW swell 5 to 6 ft at 10 seconds.
Sat..N wind 5 to 10 kt...rising to 15 to 20 kt in the afternoon. Wind waves 3 to 4 ft...building to 5 to 6 ft in the afternoon. NW swell 5 ft at 10 seconds.
Sat night..N wind 20 to 25 kt. Wind waves 6 to 7 ft. NW swell 5 ft...subsiding to 2 ft after midnight.
Sun..N wind 20 to 25 kt. Wind waves 5 to 7 ft. NW swell 3 to 4 ft.
Sun night..N wind 20 to 25 kt...easing to 15 to 20 kt after midnight. Wind waves 5 to 8 ft. NW swell 4 to 5 ft.
Mon..N wind 20 kt...rising to 25 kt in the evening, then... Easing to 15 kt after midnight. Wind waves 6 ft. NW swell 4 ft.
Tue..N wind 15 to 20 kt. Wind waves 4 to 5 ft... Subsiding to 3 ft after midnight. NW swell 7 ft.
PZZ300 803 Am Pdt Fri Aug 7 2020
Synopsis for the southern oregon coastal waters..A thermal trough will strengthen along the coast today and remain strong through Sunday night. This will bring strong north winds and steep to very steep seas. The strongest winds and steepest seas will be south of cape blanco. Winds and seas will peak Sunday but will remain hazardous through at least Monday.


7 Day Forecast for Marine Location Near Yoncalla, OR
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location: 43.54, -123.35     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 071554 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 854 AM PDT Fri Aug 7 2020

DISCUSSION. A surface thermal trough is positioned along the coast. This trough will strengthen this weekend and linger into early next week. An upper level ridge is positioned offshore and will build into the area this weekend into Monday. This pattern will bring a significant warming trend for inland areas. High temperatures are expected to peak Monday afternoon with highs in the upper 90s to lower 100s (expect higher in the lower Klamath River Valley in western Siskiyou County). Areas along the coast and coastal mountains will see gusty north to northeast winds into early next week. Strongest winds at the coast will occur in the afternoon and early evening periods. The offshore winds (winds out of the northeast) will bring a Chetco warming effect to the southern Curry coast near Brookings. Highs are expected in the 80s this weekend for Brookings.

Models continue to show that a slight chance of thunderstorms is possible for portions if northern California as mid level southerly moisture moves into the area and combines with weak instability. The main area of concern for thunderstorms is central/eastern Siskiyou and Modoc Counties late Monday afternoon and evening. On Tuesday, the areas for potential thunderstorms shifts slight east and models support a slight chance for thunderstorms for Modoc County and extreme southeast Lake County.


AVIATION. For the 07/12Z TAF Cycle . The latest satellite image shows clear skies over most of the area, except for some patchy low clouds in portions of the Coquille and Umpqua Basin. However the air mass is expected to become drier over time, therefore they should not expand much more than they already have. All terminals are expected to remain VFR through the TAF period. Gusty winds are likely at the coast, especially north of Cape Blanco late this morning into this evening. Gusty breezes are expected for the inland terminals late this afternoon and early evening.

There is some evidence marine stratus could develop along the coast and offshore north of Cape Blanco towards the end of the TAF period, including North Bend, but confidence is not high enough to include the lower conditions in the TAF. -Petrucelli

MARINE. Updated 803 AM PDT Friday 7 August 2020 . A thermal trough will develop along the coast today and is expected remain in place through at least Sunday night before shifting inland on Monday.

This will result in strong north winds and steep to very steep seas with the strongest winds and steepest seas expected south of Cape Blanco.

Right now, we think the gales should remain mainly over the southern waters from late Friday afternoon through Monday. However there is some indication hazardous seas warning conditions could expand north just west of Coos Bay late Sunday afternoon and evening. It's still a few days out there, so no changes will be made at this time, but this could change, so watch for updates.

There's good agreement winds and seas will peak Sunday, then gradually diminish Sunday night into Monday, but seas are still expected to remain hazardous through at least Monday night. -Petrucelli/Sven

PREV DISCUSSION. /Issued 447 AM PDT Fri Aug 7 2020/

DISCUSSION . The forecast is on track with relatively little change necessary. Conditions look to be seasonable at least through Wednesday. Of particular note, an inland warming trend will begin today with highs near normal. This trend still looks to reach its peak on Monday afternoon with highs in the 90s to lower 100s . except up to around 110 in the Klamath River Valley in western Siskiyou County. Also, easterly winds will produce downslope warming for Brookings with highs in the upper 70s to mid 80s/well above normal through Monday. A slight chance of late day thunderstorms remains for portions of northern California on Monday and Tuesday . though with a higher probability over the Sierra Nevada south of Modoc County on Monday and likewise east of our area on Tuesday.

First, a few low clouds remain banked up against the Umpqua Divide early this morning, with another patch over southeast Siskiyou County. These clouds will dissipate as the air mass dries this morning. The exception to clear skies will likely be a few low topped cumulus buildups over southeast Modoc County late this afternoon. Expect fewer coastal low clouds Friday through the weekend as low level easterly winds bring a drier air mass.

A thermal trough will strengthen along the coast today then persist into Monday with gusty north to northeast surface winds for the coast and coastal waters, as well as inland over the mountains in the coast range and western Siskiyou County.

Also, gusty, breezy northerly winds are expected for inland areas during the late afternoon and evening hours . strongest in west side valleys.

As mentioned above, in addition to seeing the hot temperatures inland on Monday, models are indicating a weak low will be positioned off the coast of central California. This will allow a noteworthy/moderate increase of mid level moisture over northern California from the south. This moisture combined with weak instability, CAPE and weak shortwave activity aloft will likely extend over the northern Sierra Nevada, and may extend farther north into southern portions of Siskiyou and Modoc Counties as well. The GEFS ensemble members have trended toward a majority of members keeping this instability a short distance south of our area. But, the operational GFS is among those that warrant continuing the inclusion of a slight chance for thunderstorms in the forecast for Monday afternoon/evening . roughly from Mount Shasta eastward to the Warner Mountains. A west steering flow of about 10 to 15 kt is expected.

On Tuesday into Wednesday, a broad trough to the north will deepen with its axis roughly over the coast. This will bring a cooling trend and shift the region of instability east-northeastward. A slight chance of thunderstorms on Tuesday will be highest a short distance east of our area . for northwest Nevada into far southeast Oregon. But, the operational GFS and more than half of the ensemble members indicate weak instability and sufficient moisture to warrant continuing the slight chance of thunderstorms over the Warners late Tuesday. By Wednesday, expect convective activity to be east of our area. The thermal trough winds are expected to weaken during this period and inland areas will see breezy northwest to west winds during the afternoon/early evening.

Model uncertainty increases beyond Wednesday. The upper trough is expected to swing inland on Thursday, with high temperatures at a minimum for the week. But, there is uncertainty in the strength of this troughing on Thursday, then growing uncertainty in the extent to which the trough persists or we see ridging. In either case, the late week air mass does look to be stable.

MFR WATCHES/WARNINGS/ADVISORIES. OR . None.

CA . None.

Pacific Coastal Waters . Small Craft Advisory until 11 PM PDT Monday for PZZ356. Gale Warning from 5 PM this afternoon to 11 PM PDT Monday for PZZ356-376. Small Craft Advisory from 5 PM this afternoon to 11 PM PDT Monday for PZZ350-370. Small Craft Advisory until 5 PM PDT this afternoon for PZZ376.

CC


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 54 mi91 min N 8 G 12 68°F1021.5 hPa

Wind History for Charleston, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Roseburg Regional Airport, OR21 mi74 minNNE 510.00 miFair69°F48°F47%1020.4 hPa

Link to 5 minute data for KRBG

Wind History from RBG (wind in knots)
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Last 24hrNW5N4NE53NE7N8N10N6N6N5W3CalmCalmCalmCalmCalmCalmCalmCalmCalmN9NE7NE5N7
1 day ago--N9N8NW7NW8NW10
G16
W7W8NW73NE3NW3CalmN3CalmCalmCalmCalmCalmCalmCalmCalmCalmNW5
2 days agoN3NE7N65W9N9NW12
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NW9NW5CalmN3N4NW3CalmN3N4N3CalmCalmNW3NW5CalmCalmN4

Tide / Current Tables for Reedsport, Umpqua River, Oregon
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Reedsport
Click for Map
Fri -- 03:59 AM PDT     6.22 feet High Tide
Fri -- 06:12 AM PDT     Sunrise
Fri -- 10:10 AM PDT     Moonset
Fri -- 10:45 AM PDT     0.26 feet Low Tide
Fri -- 05:10 PM PDT     5.92 feet High Tide
Fri -- 08:30 PM PDT     Sunset
Fri -- 10:51 PM PDT     Moonrise
Fri -- 11:05 PM PDT     1.91 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.83.955.96.25.95.13.82.41.20.40.30.81.93.24.55.55.95.75432.21.9

Tide / Current Tables for Gardiner, Umpqua River, Oregon
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Gardiner
Click for Map
Fri -- 03:44 AM PDT     6.22 feet High Tide
Fri -- 06:12 AM PDT     Sunrise
Fri -- 10:10 AM PDT     Moonset
Fri -- 10:30 AM PDT     0.26 feet Low Tide
Fri -- 04:55 PM PDT     5.92 feet High Tide
Fri -- 08:30 PM PDT     Sunset
Fri -- 10:50 PM PDT     1.91 feet Low Tide
Fri -- 10:51 PM PDT     Moonrise
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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34.25.366.25.74.83.52.110.30.312.23.64.85.75.95.64.83.72.82.11.9

Weather Map
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wmap_P
GEOS Local Image of PacificNorthwest    EDIT
NOTE: East coast views moved to GEOS-16. They are experimental and not well supported by NOAA so they may not be correct so be warned. This change required redoing a large amount of the GOES code. If the image you are expecting is not showing, please let me know. You may need to use the EDIT function to update your location.
Link to Loop

Other links: Northern Pacific     Contential US     Full GOES-East
Wind Forecast for Medford, OR (15,3,4,5)
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Ground Weather Radar Station Medford, OR
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