John Day, Oregon
Current Conditions
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Almanac
Average High: 42°
Average Low: 20°
Record high/year: 63° (1954)
Record low/year: -9° (1985)
Sunrise: 7:00 AM
Sunset: 4:22 PM
Detailed History
Sun and Moon
Sunrise: 07:00 AM (PST)
Moon Rise: 11:11 AM (PST) 11 21
Sunset: 04:22 PM (PST)
Moon Set: 08:41 PM (PST) 11 21
Moon Phase
Next 12 Hours
Chance of Snow
Chance of Snow
Snow
Snow
Snow
Forecast data from the National Digital Forecast Database
5-Day Forecast
Hi 40°
Lo 31°
Mostly Cloudy
Hi 40°
Lo 20°
Chance of Snow
Hi 43°
Lo 31°
Mostly Cloudy
Hi 47°
Lo 25°
Mostly Cloudy
Hi 49°
Lo 23°
Partly Cloudy
Forecast for John Day Basin
Tonight
Cloudy. A chance of rain in the evening...then rain likely overnight. Areas of blowing snow overnight. Windy. Lows 34 to 42. South wind 10 to 20 mph and gusty increasing to 20 to 30 mph with gusts to around 40 mph overnight. Chance of precipitation 70 percent.
Sunday
Cloudy. Areas of blowing snow in the morning. Rain or snow likely in the morning...then a chance of showers in the afternoon. Windy. Snow accumulation up to 1 inch. Highs 40 to 46. West wind 20 to 30 mph. Gusts around 40 mph in the morning. Chance of precipitation 70 percent.
Sunday Night
Mostly cloudy in the evening then becoming partly cloudy. Colder. Lows 20 to 25. Southwest wind 5 to 15 mph in the evening becoming light.
Monday
Partly cloudy in the morning then becoming mostly cloudy. Highs 44 to 49. South wind 5 to 15 mph.
Monday Night
Mostly cloudy. Lows 25 to 30. South wind 5 to 15 mph.
Tuesday through Wednesday Night
Partly cloudy. Highs 46 to 56. Lows 22 to 27.
Thanksgiving Day
Mostly cloudy. A chance of rain. Highs 49 to 54.
Thursday Night
Mostly cloudy. A slight chance of rain showers. Lows 26 to 31.
Friday
Partly cloudy. A slight chance of showers. Highs 45 to 53.
Friday Night
Partly cloudy. A slight chance of rain or snow. Lows 24 to 29.
Saturday
Mostly cloudy. A slight chance of showers and snow showers. Highs 39 to 49.
Personal Weather Stations
Personal Weather Stations [Add your weather station!]
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Location: Mount Vernon 4se, Mount Vernon, OR Updated: 5:00 PM PST |
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| Temperature: 32.2 °F | Dew Point: 16 °F | Humidity: 52% | Wind: SE at 4.0 mph | Pressure: 29.95 in | Hourly Precipitation: 0.00 in | Windchill: 28 °F | Historical Graphs |
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Location: RAWS FALL MOUNTAIN OR US, Canyon City, OR Updated: 4:28 PM PST |
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| Temperature: 23 °F | Dew Point: 12 °F | Humidity: 62% | Wind: ENE at 5 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 17 °F | Historical Graphs |
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Location: MesoWest STARR RIDGE OR US SNOTEL, Canyon City, OR Updated: 4:00 PM PST |
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| Temperature: 30 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 30 °F | Historical Graphs |
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Location: Prairie City Weather, Prairie City, OR Updated: 5:00 PM PST |
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| Temperature: 31.9 °F | Dew Point: 21 °F | Humidity: 63% | Wind: Calm | Pressure: 30.12 in | Hourly Precipitation: 0.00 in | Windchill: 32 °F | Historical Graphs |
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Location: RAWS KEENEY TWO OR US, Long Creek, OR Updated: 4:28 PM PST |
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| Temperature: 26 °F | Dew Point: 16 °F | Humidity: 66% | Wind: SE at 6 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 19 °F | Historical Graphs |
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Location: DDMET Seneca, OR, Seneca, OR Updated: 3:55 PM PST |
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| Temperature: 34 °F | Dew Point: 17 °F | Humidity: 50% | Wind: Calm | Pressure: 30.06 in | Hourly Precipitation: 0.00 in | Windchill: 34 °F | Historical Graphs |
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Location: RAWS BOARD CREEK OR US, Long Creek, OR Updated: 4:29 PM PST |
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| Temperature: 30 °F | Dew Point: 14 °F | Humidity: 51% | Wind: SE at 4 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 26 °F | Historical Graphs |
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Location: City Hall, Seneca, OR Updated: 5:00 PM PST |
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| Temperature: 29.8 °F | Dew Point: - | Humidity: - | Wind: North at 3.0 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 30 °F | Historical Graphs |
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Location: APRSWXNET Long Creek OR US, Long Creek, OR Updated: 4:44 PM PST |
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| Temperature: 34 °F | Dew Point: 26 °F | Humidity: 71% | Wind: Calm | Pressure: 29.95 in | Hourly Precipitation: 0.00 in | Windchill: 34 °F | Historical Graphs |
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Location: MesoWest LAKE CREEK R.S. OR US SNOTEL, Prairie City, OR Updated: 4:00 PM PST |
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| Temperature: 31 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 31 °F | Historical Graphs |
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Location: MesoWest BLUE MOUNTAIN SPRING OR US SNOTEL, Prairie City, OR Updated: 3:00 PM PST |
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| Temperature: 31 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 31 °F | Historical Graphs |
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MSN Maps of: |
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| Temperature | Dew Point | Humidity | Wind | Pressure | Hourly Precipitation | - | |
NWS Forecaster Discussion
060 fxus66 kpdt 212332 aaa afdpdt Area forecast discussion...updated National Weather Service Pendleton or 332 PM PST Sat Nov 21 2009 Updated aviation discussion Short term...tonight through Monday...thoughts have changed little from the previous overnight shift. Models remained very consistent with the progression of the system across the area. With a couple of pronounced issues dealt with today. First, decided to follow the surface low as shown by the NAM with the 18z GFS now lending the closest support of recent runs. This gives a very tight pressure gradient across most of the area as the surface low tracks across the Washington Cascades and the lower Columbia Basin before lifting northeast later tomorrow. These gradients, combined with a very stable lower level air mass, will give a prolonged period of strong winds aloft down toward the surface. Will issue numerous wind advisories and high wind warnings as a result. The second issue deals with snowfall. Snow level will be somewhat variable with a brief period of warm air advection as warm diffluent air crosses the Cascades tonight. The Washington Cascades will see significant accumulations mainly tonight with the major passes impacted. Do think mainly western areas will bear the brunt after the cold front passes later tonight and Sunday. The Blue Mountains will start seeing accumulations later tonight at the higher elevations and passes but snow levels will drop and accumulation rates will increase mainly tomorrow after the cold front passes and a northwesterly flow develops. Both areas will see significant blowing snow but dont have the confidence to go with a Blizzard Warning, but it bears watching however. Other mountain areas will see snow and maybe some blowing as well, but should stay below advisory amounts. Precipitation should begin tapering off across the west by tomorrow afternoon and gradually taper off across the east tomorrow evening. /Jbonk Long term...Monday night through Saturday...a weak system will break up Monday night it rides over a building upper level ridge. The building ridge will move slowly east over the Pacific northwest Tuesday. The departing system will combine will upslope flow in the mountains to keep a slight chance of showers in northeast Oregon Tuesday. Also...slopover precipitation may occur near the Cascades. Subsidence associated with the ridge will provide light winds and clearing skies with the strong surface inversions Tuesday night. In the lower Columbia Basin patchy fog and freezing fog will form at night under the inversions and keep daytime temperatures Wednesday below normal. At higher elevations the surface inversions will break during the day and warmer air aloft associated with the ridge will reach the surface to produce large diurnal temperature spreads. Wednesday night through Friday there are dramatic differences between the GFS and European model (ecmwf) models even though both have southwest flow at 500 mb. The 0z European model (ecmwf) has a more progressive pattern with a front at an angle to the 500 mb flow that will move into eastern Washington and Oregon and form a deformation zone over the Blue Mountains that drops half an inch of rain Thursday. The 12z GFS has the front parallel to the 500 mb flow so it remains offshore until Friday. The GFS ensemble runs show 500 mb flow running to both extremes with no clustering. Decided to make little change to existing forecast with a chance of probability of precipitation most places and likely probability of precipitation over the mountains. Think European model (ecmwf) is overblown with amount of precipitation unless the deformation band does set up...but did trend toward it by keeping at least a chance of probability of precipitation across the area. When the 12z run of the European model (ecmwf) arrived it was slower with no deformation band...but it still supported the faster arrival of the front during the day Thursday. Both models had precipitation Friday with the GFS pushing the front through and the European model (ecmwf) moving the upper level trough through. With low confidence due to model differences kept a low chance probability of precipitation across the area Saturday. Coonfield && Aviation...0z tafs...VFR conditions will prevail in most areas through 04z with broken middle level ceilings. Another Pacific weather system will move into the area tonight and early Sunday morning with rain and mountain snow. This will cause areas of MVFR conditions. IFR with possibly even LIFR conditions in local areas with rain and snow...especially near any mountain ranges or over the central Oregon plateaus near taf site krdm. Winds of 10 to 20 kts with gusts to 30 kts from the southwest will be common in all areas today. However the winds will increase overnight tonight as pressure gradients tighten up ahead of the next weather system. During that time winds are expected to increase to at least 15 to 25 kts with gusts to 40 kts or possibly even higher into Sunday. 76 Preliminary point temps/pops... PDT 41 47 31 43 / 80 70 10 10 alw 39 48 32 43 / 90 80 10 10 psc 37 51 30 44 / 90 50 10 10 ykm 32 45 29 44 / 90 40 10 10 hri 38 49 29 45 / 80 50 10 10 eln 34 39 26 39 / 90 70 10 20 rdm 35 45 24 47 / 80 40 10 10 lgd 36 42 23 40 / 80 80 20 10 gcd 34 41 21 44 / 70 60 10 10 dls 37 49 32 47 / 80 40 20 10 && PDT watches/warnings/advisories... or...High Wind Warning from 7 PM this evening to 10 am PST Sunday for orz049-050. Winter Storm Warning from 10 PM this evening to 7 PM PST Sunday for orz502. High Wind Warning from 1 am to 4 PM PST Sunday for orz042. Wind Advisory from 10 PM this evening to 1 PM PST Sunday for orz043. Wind Advisory from 10 PM this evening to 7 PM PST Sunday for orz501-504. Winter Weather Advisory from 10 PM this evening to 7 PM PST Sunday for orz503. Wind Advisory from 4 am to 4 PM PST Sunday for orz041-044. Washington...Winter Weather Advisory from 7 PM this evening to 4 PM PST Sunday for waz501-502. Winter Storm Warning from 10 PM this evening to 7 PM PST Sunday for waz030. Wind Advisory from 10 PM this evening to 7 PM PST Sunday for waz029. Wind Advisory from 4 am to 4 PM PST Sunday for waz024-028. && Threat index Sunday : red Monday : green Tuesday : green Green: none or limited need for watches, warnings, or advisories. Yellow: a few watches, warnings, or advisories possible or in effect. Red: numerous watches, warnings, or advisories possible or in effect. For additional weather information, check our web site at... www.Weather.Gov/Pendleton $$ 87/76/76