Snow Across the Great Lakes, Central Appalachians, and Northeast; Unsettled Weather in the West

Light to moderate snow will continue into Saturday over the Great Lakes, Central Appalachians, and Northeast. This weekend into next week, a series of atmospheric rivers will bring gusty winds, periods of heavy rain, and mountain snow to northern California and the Pacific Northwest. Colder temperatures are in store for the weekend from the Great Lakes to East Coast. 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

Click here for Probabilistic Snowfall Forecasts

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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