EasyDNNNewsSearch

Weather Forecasts and Warnings

Weather Forecasts and Warnings

  

National Weather Service
Nationwide Weather Information

Montana Weather Service Office Contacts and Social Media Links
Montana All-Hazards Weather Monitor
WATCHES, WARNINGS or ADVISORIES for Montana

NWS BILLINGS
Public – (406) 652-1916
2170 Overland Ave
Billings, MT  59102-6455

www.weather.gov/billings

     

NWS GREAT FALLS
Public – (406) 453-2081
5324 Tri-Hill Frontage Road
Great Falls, MT  59494-4933

www.weather.gov/greatfalls

      

 

NWS GLASGOW
Public – (406) 228-4042
92 Airport Road
Glasgow, MT  59230-0991

www.weather.gov/glasgow

      

NWS MISSOULA
Public – (406) 329-4840
5765 Highway 10 West
Missoula, MT  59807

www.weather.gov/missoula

      

 

 

NEW, NEW, NEW  
The NWS Enhanced Data Display (EDD) is an experimental site with a lot of very useful information on it.  Are you planning on traveling and want to see the TRAVEL HAZARD FORECAST for your journey?  Watch this short video about how to the use the new tool - IT'S VERY COOL. Useful information including 24 hour rainfall, snow reports, latest radar and current hazards is located here

Significant Weather Product Definitions

WATCH

Issued when hazardous weather is forecast to occur, but timing is still uncertain.

Issued for Blizzards, Winter Storms, Severe Thunderstorms, Tornadoes, High Winds and Floods.

WARNING

Issued when hazardous weather is imminent or is occurring and is a threat to life and/or property.

ADVISORY

Issued when hazardous weather is imminent or occurring and is an inconvenience or nuisance.

SEVERE STORMS

Tornado Warning

Issued when a violent rotating column of air, usually from a cumulonimbus cloud, circulation reaching the ground is seen by trained weather spotters or indicated on radar.

Funnel Cloud

A statement will be issued when a rotating column of air with its circulation not reaching the ground is sighted. If the funnel cloud is expected to touch the ground (tornado) a warning will be issued.

Severe Thunderstorm Warning

Issued for winds greater than or equal to 58 mph and/or hail greater than or equal to 1 inch in diameter.

OBSTRUCTIONS TO VISION

Dense Fog Advisory

Issued when the visibility is less than or equal to 1/4 mile in widespread dense fog and expected to persist for more than 3 hours.

Smoke Advisory

Issued when the visibility is less than or equal to 1/4 mile in smoke and expected to persist for more than 3 hours.

Eastern Montana: Issued when the visibility is less than or equal to 3 miles in smoke and expected to persist.

WIND

High Wind Warning

Issued for sustained winds greater than or equal to 40 mph and/or gusts greater than or equal to 58 mph

Exception: Upper Yellowstone Valley and Rocky Mountain Front where issued for wind gusts to 75 mph or greater.

Wind Advisory

Issued for Upper Yellowstone Valley ONLY for wind gusts 58 to 74 mph.

FLOOD

Flash Flood Warning

Issued when life threatening flooding is expected within 6 hours.

Flood Warning

Issued for rivers, small creeks and urban areas.

Flood Advisory

Issued for flooding of low lying areas next to rivers and creeks, but not threatening life or property.

WINTER

Winter Storm Warnings

Western, North-Central, Southwest and Southeast Montana: Issued when hazardous winter weather conditions, consisting of heavy snow and/or blowing snow, significant accumulations of freezing rain or sleet will cause significant societal impacts.

Any one or a combination of the following (some areas may have more specific criteria):

Eastern Montana:

  • 6 inches of snow or more in 12 hours or 8 inches of snow or more in 24 hours.
  • Sustained winds of less than 34 mph causing blowing snow (with or without snowfall occurring) reducing visibility to occasionally ¼ mile for 3 hours or more.
  • Wind Chill of ≤ -40 degrees with winds of ≥ 10 mph occurring with any of the above criteria
  • An event that will cause moderate to major impacts to travel/commerce

Blizzard Warning

Issued when the following conditions are expected to prevail for 3 hours or longer:

Sustained winds or gusts to 35 mph or more AND

Considerable falling or blowing snow, reducing visibilities frequently to less than 1/4 mile.

Ice Storm Warning

Issued for freezing rain with 1/4 inch accumulation of ice, and when significant and possibly damaging accumulation of ice are expected

Winter Weather Advisory

Issued for an event that will cause minor to moderate impacts to travel / commerce, which may include any one or combination of the following:

  • Snow that causes minor to moderate impacts to travel/commerce
  • Any accumulating amount of snow of a half inch or more if there is no snow already on the ground and/or there has been no significant snowfall (>1”) in the past two weeks
  • Wind driven snow that occasionally reduces visibilities down to a ¼ mile
  • Wind Chill Advisory criteria along with falling snow and/or blowing snow reducing visibility to down to a ¼ mile
  • Sleet
  • An event that transitions to or from Freezing Rain into any of the above criteria

No Advisories are issued for snow at elevations above pass level.

Blowing and/or Drifting Snow

Wind driven snow that reduces visibility. Blowing snow can be falling snow or snow that has already accumulated and is picked up and blown by strong winds. Drifting snow is an uneven distribution of snowfall / depth caused by strong surface wind, which may occur during or after snowfall.

Wind Chill Advisory

Issued when wind chill temperatures are expected to reach -10F to -19F west of the divide, and -20F to -39F east of the divide, with no precipitation occurring.

Wind Chill Warning

Issued when wind chill temperatures are expected to reach -20F or colder west of the divide, and -40F or colder east of the divide with winds of ≥ 10 mph with no precipitation occurring

 

 

 

  • 7 December 2016
  • Author: Pizzini, Dawn
  • Number of views: 735
  • Comments: 0
Tags:
Print

Name:
Email:
Subject:
Message:
x

Navigation Blocks_Text/HTML