Thursday, April22, 2021
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Marine Weather and Tides
Pasco, WA

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 5:54AMSunset 7:54PM Thursday April 22, 2021 7:45 PM PDT (02:45 UTC) Moonrise 2:23PMMoonset 4:16AM Illumination 85% Phase: Waxing Gibbous; Moon at 11 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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7 Day Forecast for Marine Location Near Pasco, WA
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location: 46.21, -119.09     debug


Area Discussion for - Pendleton, OR
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FXUS66 KPDT 222353 CCA AFDPDT

Area Forecast Discussion National Weather Service Pendleton OR 453 PM PDT Thu Apr 22 2021

.Corrected days of forecast for the long term discussion

SHORT TERM. Tonight through Saturday . Shortwave trough and back door cold front moving across ID/Western MT are clipping the intermountain west this afternoon, with shower activity around the Spokane area. Models continue to indicate isolated showers developing over the northern Blues in WA and across Wallowa county this afternoon as this system moves over the eastern periphery of the CWA. With weak instability within this area and thunder already being observed in northeast WA, cannot rule a slight chance of thunder in these areas. Westerly winds through the Cascade gaps and into the Columbia Basin will also continue through the late afternoon as cross Cascade thermal gradient persists. Tomorrow, dry and calm conditions return as upper level ridge of high pressure over the eastern Pacific moves into the PacNW. Cloud cover will being to increase as ridge axis passes east over the region. By Friday night, ridge axis will be pushed into eastern WA/OR as an upper level low over the northeast Pacific pushes a shortwave trough and cold front into the PacNW. This will put the region under a moist southwest flow aloft into Saturday morning. Upper level shortwave trough and cold front will push across the region through Saturday morning, with precipitation chances increasing from west to east. Snow levels will be high enough ahead of this system that mountain slopes below the Cascade crests will mainly see rain showers with this initial system while lowland areas across the forecast area will at least see a chance of rain showers with trace amounts of rain early Saturday. By Saturday night, precipitation chances will drop off in the Basin and adjacent valleys, with chances of rain/snow showers possible in the mountains. Breezy westerly winds will also develop ahead of this system and persist through Saturday, especially through the Cascade gaps. Temperatures will be on a cooling trend into the weekend as the system today and Saturday filter in a cooler airmass into the region. Lawhorn/82

LONG TERM. Saturday night through Thursday . The axis of the organized low impacting our area over the weekend will begin to move onshore Sunday. PoPs will persist primarily in the mountains and central OR, as SW flow aloft advects moisture into the CWA, with the lower Basin seeing only slight chance PoPs. Another round of light precip is possible early Monday on the back end of the low, as deterministic GFS and ECMWF show strong NW flow aloft leading to some upslope showers along the mountains. Snow levels will dip a bit as colder air moves in behind the low, however are expected to remain above 4000 ft across the forecast area through the duration of the low's passage.

Tuesday and beyond, ensembles show ridging taking over for the rest of the work week, beginning another warming trend. Models disagree on the strength of this high, however, with deterministic models and NBM suggesting sufficient flow aloft for some mountain PoPs through the majority of the work week. The lower elevations, however, look to remain dry for the remainder of the long term period beyond Monday night. Highs expected to climb into the low to mid 70s by the end of next week in the valleys, while the mountains see 50s and 60s. 74

AVIATION. 00Z TAFs . VFR conditions will persist through the next 24 hours. Skies will become clear this evening and then later tonight mid and high clouds will increase again. On Friday clouds will continue to increase, but it will remain dry at all terminals. Winds will be lighter on Friday with speeds generally less than 10 kts. 88

PRELIMINARY POINT TEMPS/POPS. PDT 41 67 44 59 / 10 0 10 50 ALW 44 69 47 60 / 10 0 10 60 PSC 44 71 51 64 / 10 0 10 40 YKM 39 68 45 60 / 0 0 20 60 HRI 44 70 47 63 / 10 0 10 50 ELN 39 66 41 55 / 0 0 20 50 RDM 28 68 37 57 / 0 0 30 60 LGD 38 64 42 51 / 20 0 10 70 GCD 35 67 42 56 / 0 0 20 70 DLS 43 69 46 59 / 0 0 30 70

PDT WATCHES/WARNINGS/ADVISORIES. OR . None. WA . None.



SHORT TERM . 82 LONG TERM . 74 AVIATION . 88


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Tri-Cities Airport, WA4 mi52 minSW 14 G 2110.00 miA Few Clouds71°F37°F29%1006.2 hPa

Link to 5 minute data for KPSC

Wind History from PSC (wind in knots)
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Last 24hrS8S4E6N4NE5CalmCalmCalmCalmE3CalmCalmCalmSW8W64--NW7W10NW8NW7N5CalmSW14
G21
1 day agoN5N6N4NW4NW5N4CalmNW5N4CalmCalmNE4CalmCalmCalmCalmCalmS4CalmN333SE5SE10
2 days agoN9N7N5NW3SW3NW7NW8NW3CalmNW11NW5N5N9N10N73NE12
G18
NE7N7
G17
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G21
NE9
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N9
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NE9N10

Tide / Current Tables for
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GEOS Local Image of PacificNorthwest    EDIT
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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