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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Rapid City SD
429 AM MST Sun Feb 18 2018

SDZ012>014-025>027-030>032-041>044-072>074-WYZ071-191400-
Butte-Northern Meade Co Plains-Ziebach-Northern Foot Hills-
Rapid City-Southern Foot Hills-Custer Co Plains-
Pennington Co Plains-Haakon-Fall River-Oglala Lakota-Jackson-
Bennett-Sturgis/Piedmont Foot Hills-Southern Meade Co Plains-
Hermosa Foot Hills-Northeastern Crook-
429 AM MST Sun Feb 18 2018

This Hazardous Weather Outlook is for portions of northwestern
South Dakota...southwestern South Dakota...and northeast Wyoming.

.DAY ONE...Today and Tonight

A winter storm warning is in effect tonight through Monday
evening.

Snow will develop late this afternoon and persist through
tonight. The snow will be heavy at times tonight. Wind chills will
drop well below zero tonight.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Snow will continue through Monday evening, with heavy snow
at times Monday morning. Storm total snow accumulations will be 7
to 12 inches with locally higher amounts. Wind chills will drop to
around 25 below zero Monday night. Some blowing and drifting
snow is expected with visibilities less than one half mile at times.

The result of this storm will be difficult travel and dangerously
cold wind chills through Monday night. Delaying or canceling
travel may be prudent.

Wind chills from 15 below to 30 below zero are expected Tuesday
night into Wednesday morning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today.

&&

Stay tuned to NOAA weather radio for further updates...or check
our web site at weather.gov/rapidcity

$$



Winter Storm Warning

URGENT - WINTER WEATHER MESSAGE
National Weather Service Rapid City SD
232 PM MST Sun Feb 18 2018

...POTENT WINTER STORM LATER TODAY THROUGH MONDAY NIGHT...

.A strong winter storm will cross the region tonight through
Monday night, with significant snowfall expected across much of
the area. Snow will continue across northeastern Wyoming and the
Black Hills, and spread east across western South Dakota tonight.
Snow will persist through Monday and into Monday night, before
the storm shifts east of the area on Tuesday morning. Snowfall
amounts of 6 to 12 inches are expected across much of the warning
area, with locally higher amounts likely from southern portions
of northeast Wyoming to parts of west central and southwest South
Dakota. Arctic air over the area will also produce wind chills of
15 below to 25 below zero across much of the area late tonight
through Monday night.

SDZ013-030-031-041-042-073-191300-
/O.EXT.KUNR.WS.W.0004.180218T2200Z-180220T1200Z/
Northern Meade Co Plains-Custer Co Plains-Pennington Co Plains-
Fall River-Oglala Lakota-Southern Meade Co Plains-
Including the cities of Faith, Folsom, Wall, Ardmore, Oelrichs,
Pine Ridge, Oglala, Kyle, and Union Center
232 PM MST Sun Feb 18 2018

...WINTER STORM WARNING NOW IN EFFECT UNTIL 5 AM MST TUESDAY...

* WHAT...Heavy snow. Total snow accumulations of 7 to 10 inches,
  with localized amounts up to 12 inches.

* WHERE...The Northern Meade County Plains, the Custer County
  Plains, the Pennington County Plains, the Fall River County
  Plains, Oglala Lakota and the Southern Meade County Plains.

* WHEN...Until 5 AM MST Tuesday.

* ADDITIONAL DETAILS...Plan on difficult travel conditions.
  Winds gusting as high as 30 mph will cause areas of blowing
  and drifting snow. The cold wind chills as low as 30 below
  zero could cause frostbite on exposed skin in as little as 30
  minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Storm Warning means significant amounts of snow, sleet
and ice will make travel very hazardous or impossible. The latest
road conditions can be obtained by calling 5 1 1.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: May 16, 2007
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