Periods of Heavy Rain and Snow Continue from California through the Northern Rockies; Multiple Rounds of Ice and Snow to Impact a Large Part of the Northeastern States into Next Week

Moderate to heavy rain with a flooding risk will continue for northern and central California, with heavy mountain snow in the Sierras, southern Cascades, and northern Rockies through Friday. A series of winter storms will track from the Upper Midwest to off the Northeast U.S. coast into next week bringing rounds of moderate to locally heavy rain south of their track and ice and snow to the north. Read More >

Winter Briefing

To view hazards legend: Stop the loop, step to the end, and use the alerts drop-down. View full radar page here.

Click here for a static hazards map.

Local Storm Reports

Precipitation Forecast

Liquid Precipitation

Snowfall

Ice

Range of 3-Day Snowfall Possibilities

Probability of Snow Amounts

Winter Storm Severity Index

Day 1

Day 2

Day 3

WSSI Web Page

WSSI Fact Sheet

Additional Weather Elements

(mouse over day or period to see map below)

Max Temperature	Day 1		Day 2		Day 3		Day 4		Day 5
Min Temperature	Day 1		Day 2		Day 3		Day 4		Day 5
Wind Chill	Period 1	Period 2	Period 3	Period 4	Period 5	Period 6	Period 7	Period 8	Period 9
Max Wind Gust	Period 1	Period 2	Period 3	Period 4	Period 5	Period 6	Period 7	Period 8	Period 9
Chance of Precip	Period 1	Period 2	Period 3	Period 4	Period 5	Period 6	Period 7	Period 8	Period 9
BH Snow Depth	Period 1	Period 2	Period 3	Period 4	Period 5	Period 6	Period 7

Forecast Timelines

Single Site Timelines

Detailed Point Forecast

(click map to change the location of the forecast listed below the map)

Climate Outlooks

8-14 Day Temp Outlook

8-14 Day Precip Outlook

Winter Weather Definitions

Winter Storm WATCH:

A winter storm or blizzard is possible, but the timing and area affected are still uncertain.

Winter Storm WARNING:

A dangerous winter storm with snow, freezing precipitation, strong winds, and/or cold temperatures is expected or occurring.

Blizzard WARNING:

A severe winter storm with winds 35 mph or greater and snow or blowing snow, reducing visibility to less than 1/4 mile is expected or occurring.

Ice Storm WARNING:

Ice accumulations of 1/4 inch or more that could cause dangerous conditions and significant damage is expected or occurring.

Winter Weather ADVISORY:

Three to five inches of snow, blowing snow, light freezing precipitation, strong winds, and/or cold temperatures are expected or occurring.

Wind Chill WARNING:

Wind chill values -35 degrees F or colder.

Wind Chill ADVISORY:

Wind chill values between -25 degrees and -35 degrees F.

High Wind WARNING:

Sustained winds 40 mph or greater or wind gusts 58 mph or greater.

Wind ADVISORY:

Sustained winds 30 to 39 mph or wind gusts 45 to 57 mph.

Dense Fog ADVISORY:

Visibilities at or below 1/4 mile.

Freeze WARNING:

Temperatures 32 degrees or colder for several hours over a widespread area during the growing season, generally May 1 through October 15.

Frost ADVISORY:

Temperatures 33 to 36 degrees, clear skies, and light winds for several hours over a widespread area during the growing season, generally May 1 through October 15.

Periods of Heavy Rain and Snow Continue from California through the Northern Rockies; Multiple Rounds of Ice and Snow to Impact a Large Part of the Northeastern States into Next Week

Winter Briefing

Winter Briefing

To view hazards legend: Stop the loop, step to the end, and use the alerts drop-down. View full radar page here.

Click here for a static hazards map.

Local Storm Reports

Precipitation Forecast

Liquid Precipitation

Snowfall

Ice

Range of 3-Day Snowfall Possibilities

Probability of Snow Amounts

Winter Storm Severity Index

Day 1

Day 2

Day 3

WSSI Web Page

WSSI Fact Sheet

Additional Weather Elements

Forecast Timelines

Single Site Timelines

Detailed Point Forecast

Climate Outlooks

8-14 Day Temp Outlook

8-14 Day Precip Outlook

Travel Conditions

South Dakota

Wyoming

Interactive Travel Forecast Page

Winter Weather Definitions

Winter Storm WATCH:

A winter storm or blizzard is possible, but the timing and area affected are still uncertain.

Winter Storm WARNING:

A dangerous winter storm with snow, freezing precipitation, strong winds, and/or cold temperatures is expected or occurring.

Blizzard WARNING:

A severe winter storm with winds 35 mph or greater and snow or blowing snow, reducing visibility to less than 1/4 mile is expected or occurring.

Ice Storm WARNING:

Ice accumulations of 1/4 inch or more that could cause dangerous conditions and significant damage is expected or occurring.

Winter Weather ADVISORY:

Three to five inches of snow, blowing snow, light freezing precipitation, strong winds, and/or cold temperatures are expected or occurring.

Wind Chill WARNING:

Wind chill values -35 degrees F or colder.

Wind Chill ADVISORY:

Wind chill values between -25 degrees and -35 degrees F.

High Wind WARNING:

Sustained winds 40 mph or greater or wind gusts 58 mph or greater.

Wind ADVISORY:

Sustained winds 30 to 39 mph or wind gusts 45 to 57 mph.

Dense Fog ADVISORY:

Visibilities at or below 1/4 mile.

Freeze WARNING:

Temperatures 32 degrees or colder for several hours over a widespread area during the growing season, generally May 1 through October 15.

Frost ADVISORY:

Temperatures 33 to 36 degrees, clear skies, and light winds for several hours over a widespread area during the growing season, generally May 1 through October 15.