Thursday, December12, 2019
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Marine Weather and Tides
Harper, OR

Version 3.4
NOTICE
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.
6/2/2019. Many thanks to a user for reporting an error on one of the Edit pages. The switch to PHP 7.2 caused many pages that previously worked to quit working. I fixed many but I still depend on users to report ones I missed. Please report errors HERE or send an email to me at L-36.com. Allen

Sunrise 8:09AMSunset 5:11PM Thursday December 12, 2019 7:15 AM MST (14:15 UTC) Moonrise 5:55PMMoonset 8:37AM Illumination 99% Phase: Full Moon; Moon at 16 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 Harper, OR
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location: 43.58, -117.51     debug


Area Discussion for - Boise, ID
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FXUS65 KBOI 121017 AFDBOI

Area Forecast Discussion National Weather Service Boise ID 317 AM MST Thu Dec 12 2019

SHORT TERM. Today through Sunday . Moisture will continue to flow over the region on zonal flow through Saturday morning. We will continue the Winter Weather Advisory for snow for the mountains, which runs through 12Z Friday. The most significant change in the forecast this morning is the introduction of a slight chance of thunderstorms this evening over mainly northern and eastern sections of the CWA. The SPC in Norman, OK has put much of our area in a category known as "general thunder". This simply indicates that conditions are favorable for thunderstorms, but not for severe storms. We will see instability increase late this afternoon and peak this evening as colder air moves in aloft. We do not expect lots of storms, but certainly can't rule out a few cells and therefore chose to include a mention of a slight chance of thunderstorms from roughly 5 pm MST to 11 pm MST. Heavy snow has been occurring in the mountains this morning, with Brundage receiving close to 4 inches, Bogus Basin 5, and Tamarack close to 6. At slightly lower elevations, McCall has received around 2 inches so far. More is expected today, with totals through 11 pm MST Friday forecast to be near a foot at Bogus, 8 to 10 inches at Tamarack and Brundage, and 4 at McCall. McCall's precipitation type may change to rain this afternoon, limiting their snowfall total, as they are right on the predicted rain/snow line. If they manage to stay all snow, they will get 6 to 8 inches. A cold front will sag south over the region late today, bringing lower snow levels and colder temps for tonight through the remainder of the short term. Snow levels will fall from a range of 5000 in the north and 7000 in the south this morning to a range of 3000 in the north and 5000 in the south Saturday morning.

After this first main push of moisture passes through, the focus will shift to the southern part of the CWA, where snow is forecast to increase late Friday and continue into Saturday morning. At this time, it does not appear that there will be enough snow to warrant an advisory, but that doesn't mean there won't be areas of slick roads. Anyone planning travel on SH 95, 51, or 93 Friday night or Saturday morning should be prepared for wintry travel conditions. Total snow for the higher elevations in the south will range from over a foot on top of Steens mountain, to near a foot in the Owyhees, to 6 to 10 inches in the mountains of southern and southeast Owyhee County and southern Twin Falls County. Lower elevations in these areas will see 1 to 3 inches along the state highways listed earlier. These amounts will fall from this morning through Sunday, with the bulk falling Friday into Friday night.

Saturday, snow will become less likely and accumulating snows will be confined mainly to the mountains. After seeing temps around 10 degrees above normal today, readings will only be around 5 degrees above normal Friday, and then just a degree or two above normal Saturday. Cooling continues through Sunday, when temps will be near normal.

LONG TERM. Sunday night through Thursday . Northwest flow sets up over the Intermountain West on Sunday night as the trough progresses eastward. A ridge builds off the Pacific Coast through Wednesday as conditions stay mostly dry. Model solutions split on Thursday over the progression of an upper trough as it approaches the coast. A chance of rain and snow showers was maintained across the region as there appears to be ample moisture. Temperatures will remain a couple degrees above normal through the period.

AVIATION. Mountains obscured. Widespread MVFR and local IFR/LIFR conditions in rain, snow, and low ceilings continuing through the afternoon. Snow levels 3500-4500 ft MSL. Surface winds southeast- southwest 10 kts or less becoming west- northwest around 10 kts this afternoon. Winds aloft at 10k ft MSL: west 40-50 kts becoming west-northwest 30-40 kts after 18z/Thu.

BOI WATCHES/WARNINGS/ADVISORIES. ID . Winter Weather Advisory until 5 AM MST Friday IDZ011-013. OR . None.



www.weather.gov/Boise www.facebook.com/NWSBoise www.twitter.com/NWSBoise

SHORT TERM . SP LONG TERM . AL AVIATION . AL


Weather Reporting Stations
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Ontario Municipal Airport, OR40 mi23 minNW 32.50 miLight Rain Fog/Mist39°F36°F89%1019.2 hPa

Link to 5 minute data for KONO

Wind History from ONO (wind in knots)
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Last 24hrW3CalmCalmW3CalmCalmCalmCalmCalmCalmCalmN3CalmCalmNW3CalmCalmW3W3W4SW3NW4W4NW3
1 day agoCalmW3CalmCalmCalmCalmCalmCalmNW3CalmN3W3W4CalmCalmCalmCalmW3CalmE4W4W3CalmW4
2 days agoCalmN4CalmW3CalmCalmCalmNW4NW5CalmNE3N3NW3W4W4W5CalmW3W3CalmW3W4W5W5

Tide / Current Tables for
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Tide / Current Tables for
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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 Boise, ID (9,2,3,4)
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Ground Weather Radar Station Boise, ID
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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.