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Pacific Storms Continue to Impact the West; Severe Thunderstorms Forecast Thursday in the South

A series of Pacific storm systems will continue to impact the Northwest U.S. into this coming weekend with periods of gusty winds, high surf, low elevation rain, and heavy mountain snow. Severe thunderstorms will be possible on Thursday across central/east Texas into western Louisiana and possibly the ArkLaTex and southeast Oklahoma. Read More >

 

Communicating Hazards and Impacts

Click on each day for more information:

Your National Weather Service Forecast Offices in Bismarck and Grand Forks provide forecast and warning services for the state of North Dakota.

The National Weather Service communicates the potential for severe winter weather using three tiers, first in the Hazardous Weather Outlook, followed by a Watch and then an Advisory or Warning.

 

Product Type

 Description

When Issued

Hazardous Weather Outlook

Designed to outline anticipated weather hazards for the next seven days and provide the first  heads up to any possible severe winter weather.

At least twice per day
Watch Issued when the confidence level for severe winter weather is at least 50% (uncertainty remains in exact timing and location of the storm). Normally issued 36-48 hours prior to the event
Warning Issued when there is a direct threat to life and property from severe winter weather that has a high probability of occurrence (80% or higher), or is imminent or occurring. Normally issued 12-24 hours prior to the event
Advisory Issued for winter weather conditions that have a high probabilty of occurrence, are imminent or already occurring, that may cause an inconvenience. If precautions are NOT taken, a situation may develop that may threaten life. Normally issued 12-24 hours prior to the event

 

 

Product Type

Description

Blizzard Warning When sustained or frequent wind gusts of 35 mph or greater with visibilities of less than one quarter mile for at least three hours are expected.
Winter Storm Warning When six inches of snow in 12 hours or 8 inches in 24 hours are expected and/or 1/2 inch of sleet accumulation (mixed precipitation and blowing snow may also be possible).
Ice Storm Warning When 1/4 inches or more of ice accumulation is expected.
Extreme Cold Warning When wind chill values of -40 F or colder are expected.

Be sure to follow the National Weather Service offices in Bismarck and Grand Forks on Facebook this winter season!

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