NWS Pendleton Forecasts & Briefing Hub

Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >

*Note: Images generally update three times a day at 3:00 am, 8:20 am 3:00 pm Pacific local time. This page is not an official product and graphics may not always update. This page is maintained by the National Weather Service Pendleton, Oregon forecast office.*

24-hr Obs Precip

48-hr Obs Precip

To Date Precip

Monthly Precip

Monthly Departure

Precip

Snowfall

Temperature

Wind

Fire Elements

Sunshine

Ventilation

Resources

Guidance

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Day 1 QPF

Day 2 QPF

Day 3 QPF

Day 4 QPF

Day 5 QPF

Day 6 QPF

Day 7 QPF

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Low End Amount

Expected Snowfall - Official Forecast

High End Amount

Greater/Equal 1" or more

Greater/Equal 2" or more

Greater/Equal 4" or more

Greater/Equal 6" or more

Greater/Equal 8" or more

Greater/Equal 12" or more

Day 1 Snow

Day 2 Snow

Day 3 Snow

Day 4 Snow

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Day 1 Highs

Day 2 Highs

Day 3 Highs

Day 4 Highs

Day 5 Highs

Day 6 Highs

Day 1 Lows

Day 2 Lows

Day 3 Lows

Day 4 Lows

Day 5 Lows

Day 6 Lows

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Day 1 Peak Gusts

Day 2 Peak Gusts

Day 3 Peak Gusts

Day 4 Peak Gusts

Day 5 Peak Gusts

Day 6 Peak Gusts

Day 1 Peak Sustained Winds

Day 2 Peak Sustained Winds

Day 3 Peak Sustained Winds

Day 4 Peak Sustained Winds

Day 5 Peak Sustained Winds

Day 6 Peak Sustained Winds

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Day 1 Min RH

Day 2 Min RH

Day 3 Min RH

Day 4 Min RH

Day 5 Min RH

Day 6 Min RH

Day 1 Max RH

Day 2 Max RH

Day 3 Max RH

Day 4 Max RH

Day 5 Max RH

Day 6 Max RH

LAL Day 1

LAL Day 2

LAL Day 3

LAL Night 1

LAL Night 2

LAL Night 3

Mixing Height Day 1

Mixing Height Day 2

Mixing Height Day 3

Mixing Height Night 1

Mixing Height Night 2

Mixing Height Night 3

Chance of Wetting Rain Day 1

Chance of Wetting Rain Day 2

Chance of Wetting Rain Day 3

Chance of Wetting Rain Night 1

Chance of Wetting Rain Night 2

Chance of Wetting Rain Night 3

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Day 1 Percent of Sunshine Possible

Day 2 Percent of Sunshine Possible

Day 3 Percent of Sunshine Possible

Day 4 Percent of Sunshine Possible

Day 5 Percent of Sunshine Possible

Day 6 Percent of Sunshine Possible

Day 1 Hours of Sunshine

Day 2 Hours of Sunshine

Day 3 Hours of Sunshine

Day 4 Hours of Sunshine

Day 5 Hours of Sunshine

Day 6 Hours of Sunshine

The Ventilation Index (also known as the Clearing Index) is defined as the Mixing Height (depth of the mixed layer in 100's of feet above ground level) multiplied by the Transport Wind (average wind in the mixed layer in knots) and is represented by the following equation VI= (Mix Hght/100) x Trans Wind. Values between 0 and 300 generally represent poor dispersion, 300 and 600 fair dispersion, and 600-1000 good dispersion. However, smoke management agencies are encouraged to develop criteria that are suitable and representative of dispersion conditions in their local area. If you have any questions about this product please contact the National Weather Service Office in Pendleton, Oregon at 541-276-7832..

The Daily Dispersion Outlook is available here: https://forecast.weather.gov/product.php?site=pdt&issuedby=PDT&product=DDO.

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0-hr Forecast Ventilation Category

6-hr Forecast Ventilation Category

12-hr Forecast Ventilation Category

18-hr Forecast Ventilation Category

24-hr Forecast Ventilation Category

30-hr Forecast Ventilation Category

36-hr Forecast Ventilation Category

42-hr Forecast Ventilation Category

48-hr Forecast Ventilation Category

54-hr Forecast Ventilation Category

60-hr Forecast Ventilation Category

66-hr Forecast Ventilation Category

72-hr Forecast Ventilation Category

78-hr Forecast Ventilation Category

84-hr Forecast Ventilation Category

NWS Links and Resources:

Mountain Snowpack Information from the NRCS:

OR SNOTEL Current SWE % of Normal

WA SNOTEL Current SWE % of Normal

NWS HeatRisk
Probabilistic Guidance

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Understanding NWS HeatRisk

NWS HeatRisk Prototype Main Page

Day 1 NWS HeatRisk

Day 2 NWS HeatRisk

Day 3 NWS HeatRisk

Day 4 NWS HeatRisk

Day 5 NWS HeatRisk

Day 6 NWS HeatRisk

The guidance provided below is from the National Blend of Models (NBM). The NBM is a nationally consistent and skillful suite of calibrated forecast guidance based on a blend of both NWS and non-NWS numerical weather prediction model data and post-processed model guidance. These guidance are provided as is, are experimental, and may not be current. Please see the official NWS forecast and watches, warnings, and advisories when making decisions impacted by weather. Additional guidance is available from https://blend.mdl.nws.noaa.gov/.

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Probability of max wind speed exceeding 20 mph in 24-hour period

Day 1 - 20 mph Threshold

Day 2 - 20 mph Threshold

Day 3 - 20 mph Threshold