Thursday, August13, 2020
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Marine Weather and Tides
Glasgow, 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 6:19AMSunset 8:23PM Thursday August 13, 2020 1:01 AM PDT (08:01 UTC) Moonrise 12:00AMMoonset 3:19PM Illumination 31% Phase: Waning Crescent; Moon at 24 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- 856 Pm Pdt Wed Aug 12 2020
.small craft advisory in effect from Thursday afternoon through late Friday night...
Tonight..N wind 10 to 15 kt. Wind waves 2 ft or less... Becoming 3 ft after midnight. Mixed swell nw 4 ft at 9 seconds and S 2 ft at 15 seconds.
Thu..N wind 15 to 20 kt. Wind waves 3 to 4 ft. Mixed swell nw 3 ft at 9 seconds and S 2 ft at 14 seconds.
Thu night..N wind 15 to 20 kt. Wind waves 4 to 5 ft. NW swell 2 to 3 ft at 8 seconds.
Fri..N wind 10 to 20 kt. Wind waves 3 to 4 ft. Mixed swell nw 1 to 2 ft and S 1 ft.
Fri night..N wind 15 to 25 kt...easing to 10 to 20 kt after midnight. Wind waves 4 to 6 ft. Mixed swell nw 1 to 2 ft and S 1 ft.
Sat..N wind 10 to 15 kt. Wind waves 3 to 5 ft. NW swell 2 to 3 ft.
Sat night..N wind 10 to 15 kt...backing to S after midnight. Wind waves 3 ft. Mixed swell nw 1 to 3 ft and S 1 ft.
Sun..S wind 10 kt. Wind waves 2 ft or less. NW swell 4 to 5 ft.
Mon..SE wind 5 kt...veering to W in the afternoon, then... Veering to nw in the evening...veering to ne after midnight. Wind waves 2 ft or less. NW swell 4 to 5 ft.
PZZ300 856 Pm Pdt Wed Aug 12 2020
Synopsis for the southern oregon coastal waters..A thermal trough at the coast will strengthen with strong gusty north winds and steep wind driven seas developing tonight south of cape blanco. The thermal trough strengthens more on Thursday, with hazardous seas warning conditions developing by late afternoon south of cape blanco and small craft advisory winds affecting most areas. Conditions peak on Friday, then gradually diminish Saturday.


7 Day Forecast for Marine Location Near Glasgow, OR
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location: 43.43, -124.22     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 130532 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 1032 PM PDT Wed Aug 12 2020

.Updated Aviation Discusssion.

UPDATE. Except for some high clouds and some smoke in southwest Siskiyou county, skies are clear over the forecast area at this time. An interesting feature on the satellite fog product, which samples surface temperatures and compares to the layer just above, is the extend of cold water upwelling along the coast to offshore. This shows the amount and westward extent of the upwelling current due to the prolonged strong northerly winds in the coastal waters. Current forecast looks on track and will not update this evening. Sven

AVIATION. For the 13/06Z TAFs . Along the coast and just offshore, VFR conditions are expected through the TAF period. Later tonight towards 13z, there is a chance for LIFR visibility in the vicinity of North Bend. However there is uncertainty in timing and duration and it's possible it could develop 2-3 hours earlier, if the lower conditions materialize. If anything were to develop, it should improve to VFR around 16z. Gusty winds are expected again around midday and lasting into tomorrow evening mainly north of Cape Blanco, including North Bend.

Elsewhere. VFR conditions are expected through the TAF period with gusty breezes in the afternoon and evening hours at Roseburg and Klamath Falls. The exception of wildfire smoke in western Siskiyou county where local terrain may be obscured with visibility likely below 2SM in smoke tonight. At the same time, a southwest flow could bring the smoke towards Klamath Falls resulting in hazy conditions and possibly a brief reduction in visibility. However confidence is not high enough to include this in the TAF. -Petrucelli

PREV DISCUSSION. /Issued 447 PM PDT Wed Aug 12 2020/

Updated Aviation Discussion.

DISCUSSION . Cooler temperatures and the higher level clouds streaming across the area this afternoon are the only indications of a passing dry cold front and associated upper level trough. Once these features pass tonight, ridging will begin to rebuild into the area, and the thermal trough will once again reform. Meanwhile, a large ridge will strengthen in the Four-Corners region, while a closed low meanders offshore of California. The result will be steadily warming temperatures through the remainder of the week, and then very hot temperatures through the weekend. This heat, along with the chances of thunderstorms that follow, are the primary concerns for this forecast cycle.

First the heat. With the large-scale pattern Channeling plenty of warm air into northern California and southern Oregon, and a thermal trough which will make slow but steady progress inland, confidence is pretty high that we will see the warmest temperatures so far this season by Saturday. This isn't particularly strange, as it is right around the typically warmest time of year, but it will be hot enough to put some daily record highs to the test. An Excessive Heat Watch is in effect Saturday into Sunday, and this will likely be upgraded in the coming shifts. It is recommended to begin planning now for what may be the hottest days of 2020, and although the cool lakes and streams may be tempting, be sure to take the proper precautions as water temperatures can still be as low as 50 degrees in several local rivers.

With the strong ridge over Four-Corners and broad troughing out over the Pacific, the remains of Hurricane Elida have a good chance to be ingested into the closed low off California, then swept up the coast and into our area as the low opens and rejoins the southwest flow aloft. The resulting increased moisture will have two likely effects: the first will be the enhanced chance for thunderstorms both Saturday and Sunday afternoons, and the second will be a potential for increased cloud cover. This cloud cover could shade the area and keep daytime highs a bit lower on Sunday, and could also inhibit thunderstorm development, but there is much uncertainty here. Confidence is low on the exact track of moisture or any triggering shortwaves, and thus trying to nail down cloud cover or exact timing and location of thunder are very difficult. For now, have increased the coverage of slight chance of thunder, and kept temperatures very warm on Sunday, but slightly cooler than Saturday. Hopefully we can nail down more of the details as the higher resolution models begin to resolve the features.

Hot temperatures will continue into early next week, but should gradually cool to near normal by midweek. Dry conditions are expected to persist through the remainder of the forecast period. -BPN

AVIATION . For the 13/00Z TAFs . Along the coast and just offshore, VFR conditions are expected through the TAF period. Later tonight towards 10z, there is a chance for LIFR visibility in the vicinity of North Bend. However there is uncertainty in timing and duration, if the lower conditions materialize. If anything were to develop, it should improve to VFR around 16z. Gusty winds will diminish this evening, then increase again around midday and lasting into tomorrow evening mainly north of Cape Blanco, including North Bend.

Elsewhere. VFR conditions are expected through the TAF period with gusty breezes in the afternoon and evening hours at Roseburg and Klamath Falls. The exception of wildfire smoke in western Siskiyou county where local terrain may be obscured with visibility likely below 2SM in smoke this evening. Later tonight, a southwest flow could bring the smoke towards Klamath Falls resulting in hazy conditions and possibly a brief reduction in visibility. However confidence is not high enough to include this in the TAF. -Petrucelli

MARINE . Updated 215 PM PDT Wednesday 12 August 2020 . Thermal trough at the coast will strengthen with strong gusty north winds and steep wind driven seas developing tonight south of Cape Blanco. The trough strengthens more Thursday, with hazardous seas warning conditions developing by late afternoon south of Cape Blanco and small craft advisory winds affecting most areas. Conditions peak Friday, then gradually diminish Saturday with winds and seas probably falling below advisory criteria by Saturday night. Stavish

FIRE WEATHER . Updated 230 PM PDT Wednesday 12 August 2020 . Gusty winds and very low relative humidities now occurring east of the Cascades will diminish this evening, then return to the same areas Thursday afternoon and evening. Conditions will be critical over fire weather zone 285 today and Thursday. Temperatures will warm and the air mass will dry out Thursday into Friday. Humidity recoveries will deteriorate over the ridges beginning Thursday night. It will be very hot inland this weekend with high temperatures near record values. Isolated thunderstorms may develop Saturday over the area except for the coast and Umpqua Basin, with more thunderstorms toward northern California and less toward central Oregon.

MFR WATCHES/WARNINGS/ADVISORIES. OR . Excessive Heat Watch from Saturday morning through Sunday evening for ORZ023-024-026.

CA . Excessive Heat Watch from Saturday morning through Sunday evening for CAZ080-081. Red Flag Warning from 1 PM to 8 PM PDT Thursday for CAZ285.

Pacific Coastal Waters . Small Craft Advisory until 5 AM PDT Saturday for PZZ356-376. Hazardous Seas Warning from 5 PM Thursday to 5 AM PDT Saturday for PZZ356-376. Small Craft Advisory from 5 PM Thursday to 5 AM PDT Saturday for PZZ350-370.

SBN/SBN/SBN


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CHAO3 - 9432780 - Charleston, OR 8 mi85 min NNW 2.9 G 7 63°F1019.2 hPa
SNTO3 12 mi76 min NE 4.1 54°F 1020 hPa51°F
46128 19 mi61 min 50°F 49°F
46229 - UMPQUA OFFSHORE, OR (139) 29 mi35 min 56°F5 ft

Wind History for Charleston, OR
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Southwest Oregon Regional Airport, OR2 mi65 minN 510.00 miFair55°F50°F83%1019.2 hPa

Link to 5 minute data for KOTH

Wind History from OTH (wind in knots)
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Last 24hrW3CalmW3CalmCalmCalmCalmS4CalmW5NW8NW13NW16N17N18
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1 day agoN12N7N3CalmNW4CalmN4CalmNE3N8N14N15N18
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Tide / Current Tables for Coos Bay, Oregon
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Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.


Tide / Current Tables for Charleston, Oregon
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Charleston
Click for Map
Thu -- 12:58 AM PDT     Moonrise
Thu -- 02:28 AM PDT     1.21 feet Low Tide
Thu -- 06:20 AM PDT     Sunrise
Thu -- 09:03 AM PDT     4.77 feet High Tide
Thu -- 01:40 PM PDT     3.48 feet Low Tide
Thu -- 04:19 PM PDT     Moonset
Thu -- 08:02 PM PDT     6.86 feet High Tide
Thu -- 08:22 PM PDT     Sunset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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2.61.71.31.31.72.43.34.14.64.84.64.33.93.63.53.84.45.266.66.96.65.94.8

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 (4,6,7,8)
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Ground Weather Radar Station Medford, OR
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