Sunday, April18, 2021
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Marine Weather and Tides
Grants Pass, OR

Version 3.4
NOTICE
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 6:24AMSunset 8:00PM Sunday April 18, 2021 2:16 PM PDT (21:16 UTC) Moonrise 9:32AMMoonset 12:38AM Illumination 44% Phase: First Quarter Moon; Moon at 7 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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PZZ356 Coastal Waters From Cape Blanco Or To Pt. St. George Ca Out 10 Nm- 851 Am Pdt Sun Apr 18 2021
.small craft advisory in effect from Monday afternoon through late Monday night...
Today..NW wind 5 to 10 kt. Wind waves 2 ft or less. Mixed swell W 3 ft at 11 seconds and sw 2 ft at 11 seconds. Patchy drizzle in the morning. Widespread dense fog in the morning, then areas of dense fog in the afternoon.
Tonight..N wind 5 to 10 kt. Within 5 nm of brookings southward, W wind 5 kt...veering to N after midnight. Wind waves 2 ft or less...becoming 3 ft after midnight. Mixed swell W 2 to 3 ft at 11 seconds and sw 2 to 3 ft at 11 seconds. Areas of dense fog.
Mon..N wind 5 to 15 kt...backing to nw 15 to 20 kt late in the afternoon. Wind waves 3 ft. Mixed swell W 2 ft at 10 seconds and sw 2 ft at 10 seconds. Areas of fog in the morning.
Mon night..NW wind 20 to 25 kt...becoming N 15 to 20 kt after midnight. Within 5 nm of brookings southward, nw wind 10 to 20 kt. Wind waves 3 to 5 ft. W swell 2 to 3 ft.
Tue..NW wind 15 to 20 kt. Within 5 nm of brookings southward, N wind 5 to 10 kt...backing to nw 15 kt in the afternoon. Wind waves 4 to 6 ft. W swell 3 to 5 ft. Slight chance of rain.
Tue night..NW wind 20 to 25 kt...becoming N 15 to 20 kt after midnight. Within 5 nm of brookings southward, N wind 10 to 15 kt. Wind waves 5 to 7 ft. W swell 4 to 5 ft.
Wed..N wind 20 kt...rising to 25 kt in the evening, then... Easing to 20 kt after midnight. Wind waves 6 to 7 ft. W swell 4 to 5 ft.
Thu..N wind 20 kt...easing to 10 kt after midnight. Wind waves 5 to 6 ft...subsiding to 3 ft after midnight. W swell 3 ft.
PZZ300 851 Am Pdt Sun Apr 18 2021
Synopsis for the southern oregon coastal waters..Light winds and low seas will persist today into early Monday. Marine stratus will be persistent and areas of fog will bring reduced visibilities. A thermal trough along the coast will deepen tonight into Monday, bringing the return of gusty north winds and steep wind driven seas that will reach advisory strength by Monday afternoon. Conditions worsen Tuesday with steep seas spreading to all areas. The strongest winds and steepest seas are expected south of gold beach. Conditions are expected to improve late in the week.


7 Day Forecast for Marine Location Near Grants Pass, OR
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location: 42.42, -123.35     debug


Area Discussion for - Medford, OR
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FXUS66 KMFR 181610 AFDMFR

Area Forecast Discussion National Weather Service Medford OR 910 AM PDT Sun Apr 18 2021

DISCUSSION. High pressure and warm inland with coastal fog retreating/thinning but hugging the beaches this afternoon. Warm temps region-wide today but no records expected to be surpassed. Mount Shasta may get close however. Eyes are focused on a short wave forecast to arrive Monday night, moving through Tuesday. This timing is a tad earlier than previous forecasts. This will produce a threat or coastal showers and some inland showers and possibly thunderstorms Monday night. May be introducing some mentionable pops in this period. Change is still looking likely next weekend with possible rain. Stavish

AVIATION. For the 18/06Z TAF Cycle . IFR to LIFR conditions generally exist over the coastal waters, along the coast, and a bit inland from the coast. In general, conditions along the coast are expected to stay the same in some areas and deteriorate in others this evening and overnight as cooling temperatures result in fog that may become locally dense, at times. This marine layer cloud deck is likely to lift some to IFR during the day Sunday, but probably will persist for most, if not all, of the day a bit further inland than it did today.

.MARINE. Updated 845 AM PDT Sunday, 18 Apr 2021 . Light winds and low seas will persist today into Monday. Marine stratus will be persistent and areas of fog will significantly reduce visibility at times through Monday morning.

A thermal trough along the coast will deepen tonight into Monday, bringing the return of gusty north winds and steep wind driven seas that will reach advisory strength by Monday afternoon. Conditions worsen Tuesday as the thermal trough strengthens and steep seas spread across all areas by Tuesday morning. A period of very steep and hazardous seas are possible Tuesday afternoon into Wednesday, mainly south of Gold Beach where north winds may approach gales at times Tuesday and Wednesday afternoons. Winds are expected to ease late Wednesday into Thursday, however, steep seas will likely continue through Thursday evening. /BR-y/Spilde

PREV DISCUSSION. /Issued 344 AM PDT Sun Apr 18 2021/

DISCUSSION . Current conditions and satellite imagery shows a layer of marine stratus and fog occurring at the coast and offshore with clear skies elsewhere. This layer has made it as far north as Tillamook, and in some locations, the stratus has moved somewhat inland. Fog is being reported up and down the coast with visibilities dropping to around a quarter of a mile. Please take care if you are traveling along highway 101. The persistence forecast (forecasting the same thing that happened yesterday) suggests that the fog will lift briefly in the afternoon before returning in the evening. This seems relatively reasonable as the thermal trough pushes inland today.

This inland push of the thermal trough will create the warmest day of the year so far for many inland locations. The coast, however, will continue to see the marine layer influence their temperatures, so they will be closer to normal for this time of year. Otherwise, inland temperatures away from the marine push will be 15 to 20 degrees above normal today. Temperatures have been overachieving a little bit as compared to our forecasts, and could see this pattern continuing again today. Still, I really do not see our temperatures challenging records today except for maybe Mt. Shasta City or Montague.

With the inland penetration of the thermal trough, expect the marine layer to deepen tomorrow night and also have a farther intrusion inland--particularly for the Coquille and Umpqua Basins, but it probably will not reach Roseburg. The ridge moves east of the area on Monday, and the pattern will begin to change as we begin to cool off. -Schaaf

Previous Long Term Discussion . Tuesday through Saturday, April 20-24, 2021 . The upper level pattern will change a bit next week. The ridge that has been dominant across the PacNW will weaken and this will allow an upper trough offshore to undercut the ridge with a closed low moving across Oregon and into the Great Basin Tuesday into Wednesday. This will bring some cooling and higher humidity compared to the weekend/early week dryness/warmth, but high temps (inland) probably remain a little above normal.

Some showers are possible along the coast in the morning Tuesday, then as the upper level cold pool moves through, we expect some instability Tuesday afternoon and evening for a slight chance of showers over the mountains and also across portions of the east side/NE California. Model soundings are showing about 200-500 J/KG of CAPE in those areas. Have added a slight chance of thunder, though confidence in this actually occurring still remains on the low side. Breezy to locally gusty winds are likely to accompany the trough passage, strongest over the east side, but also in some west side valleys in the afternoon and evening.

The best moisture and instability will shift to the south and east of the area on Wednesday. Cumulus could linger in some southern and eastern areas, but probably without rain. It should be noted that onshore flow north of Cape Blanco will probably result in marine stratus Wednesday morning.

Thursday into Friday, upper ridging is likely to return with mainly dry weather and high temperatures around 10 degrees above normal.

The ridge will probably be more progressive though as models and ensembles continue to indicate next weekend as a potential pattern change. Model clusters and ensembles indicate an increasing probability of a period of wetter weather arriving next weekend as upper troughing offshore moves eastward. But the timing of this, just how much and how far inland all remain uncertain. Given the dry spring so far and the ongoing drought (especially east of the Cascades), any indication of wetter weather at this range is met with pause. But, any rainfall at this point would certainly be welcome. -Spilde

Elsewhere, a generally light easterly flow over the area tonight into Sunday morning will switch to northwest Sunday afternoon into the evening as the surface high pressure area that has been northwest of the area moves southward. ~BTL

MFR WATCHES/WARNINGS/ADVISORIES. OR . None.

CA . None.

Pacific Coastal Waters . Small Craft Advisory from 2 PM Monday to 5 AM PDT Tuesday for PZZ356-370-376.

MTS/MAS/SBN


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
CECC1 - 9419750 - Crescent City, CA 64 mi46 min WSW 5.1 G 7 47°F 55°F1024.2 hPa
PORO3 - 9431647 - Port Orford, OR 65 mi46 min S 4.1 G 5.1 46°F 48°F1025.6 hPa
46027 - ST GEORGES - 8NM West Northwest of Crescent City, CA 67 mi36 min N 1.9 G 3.9 50°F1024.7 hPa

Wind History for Crescent City, CA
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Sexton Summit, OR14 mi20 minNNW 410.00 miFair70°F29°F22%1020.3 hPa

Link to 5 minute data for KSXT

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Last 24hr3Calm34SE6N3N5N7N9N8NE8S4SE6SE3CalmCalmCalmCalmS43CalmCalmCalmNW4
1 day ago34443N5NE9NE64E63SE6SE9SE8E6E7E7E86
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2 days ago34Calm3CalmN7N8N9
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N9N8NE4SE5E5SE5E6--E4E5E4SE363CalmSE4

Tide / Current Tables for Brookings, Chetco Cove, Oregon
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Brookings
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Sun -- 01:41 AM PDT     Moonset
Sun -- 03:26 AM PDT     5.83 feet High Tide
Sun -- 06:31 AM PDT     Sunrise
Sun -- 10:36 AM PDT     Moonrise
Sun -- 11:02 AM PDT     0.35 feet Low Tide
Sun -- 06:12 PM PDT     4.48 feet High Tide
Sun -- 08:02 PM PDT     Sunset
Sun -- 10:33 PM PDT     3.63 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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4.24.85.45.85.85.34.53.42.31.30.60.40.61.222.93.74.34.54.44.23.93.73.7

Tide / Current Tables for Wedderburn, Rogue River, Oregon
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Wedderburn
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Sun -- 01:43 AM PDT     Moonset
Sun -- 03:34 AM PDT     5.54 feet High Tide
Sun -- 06:31 AM PDT     Sunrise
Sun -- 10:35 AM PDT     Moonrise
Sun -- 11:14 AM PDT     0.33 feet Low Tide
Sun -- 06:20 PM PDT     4.25 feet High Tide
Sun -- 08:03 PM PDT     Sunset
Sun -- 10:45 PM PDT     3.34 feet Low Tide
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.

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3.84.55.15.55.55.14.43.42.31.40.70.30.511.82.73.444.24.243.63.43.3

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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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