Skip Navigation Links weather.gov 
NOAA logo-Select to go to the NOAA homepage NOAA's National Weather Service   Select to go to the NWS homepage
Storm Prediction Center
navigation bar left  
  navigation bar end cap


 
USA.gov is the U.S. Government's official Web portal to all Federal, state and local government Web resources and services.

Mesoscale Discussion 231
< Previous MD         Next MD >
MD 231 graphic

   MESOSCALE DISCUSSION 0231
   NWS STORM PREDICTION CENTER NORMAN OK
   0913 PM CDT SUN MAR 30 2014

   AREAS AFFECTED...PARTS OF SERN MONTANA THRU SWRN AND CENTRAL NORTH
   DAKOTA...ADJACENT NWRN SOUTH DAKOTA

   CONCERNING...HEAVY SNOW 

   VALID 310213Z - 310515Z

   SUMMARY...BLIZZARD OR NEAR BLIZZARD CONDITIONS...WITH STRONG GUSTY
   WINDS AND HEAVY SNOW RATES IN EXCESS OF 1 INCH PER HOUR...APPEAR
   POSSIBLE BY 04-07Z...IMPACTING THE INTERSTATE 94 CORRIDOR BETWEEN
   MILES CITY AND BISMARCK.

   DISCUSSION...AS A SIGNIFICANT SHORT WAVE TROUGH GRADUALLY MIGRATES
   ACROSS THE WYOMING/COLORADO ROCKIES...THE LATEST RAPID REFRESH
   CONTINUES TO INDICATE THAT A DEVELOPING LOWER/MID TROPOSPHERIC
   DEFORMATION ZONE WILL BECOME THE FOCUS FOR STRENGTHENING
   FRONTOGENESIS.  THIS IS EXPECTED ROUGHLY ALONG AN AXIS FROM MILES
   CITY MONTANA INTO AREAS OF CENTRAL NORTH DAKOTA...TO THE NORTH OF
   BISMARCK.

   ASSOCIATED FORCING FOR UPWARD VERTICAL MOTION IS FORECAST TO
   CONTRIBUTE TO PEAK VERTICAL VELOCITIES WITHIN THE 700-500 MB LAYER
   /INCLUDING THE ZONE WITH TEMPERATURES FAVORABLE FOR LARGE DENDRITIC
   ICE CRYSTAL GROWTH/ ACROSS THIS REGION DURING THE 04-07Z TIME FRAME.
    IN THE PRESENCE OF FAIRLY MOIST CONDITIONS...WITH PRECIPITABLE
   WATER IN EXCESS OF .50 INCHES...THIS APPEARS LIKELY TO SUPPORT HEAVY
   SNOW RATES IN EXCESS OF 1 INCH PER HOUR.  

   SNOW RATES MAY ALSO BE ENHANCED BY INCREASING SNOW TO LIQUID WATER
   RATIOS...AS THE ONSET OF HEAVIER PRECIPITATION COINCIDES WITH
   INCREASING NEAR SURFACE COLD ADVECTION...WITH TEMPERATURES FALLING
   INTO AND THROUGH THE 20S.  THIS IS FORECAST TO OCCUR IN RESPONSE TO
   STRENGTHENING OF NORTHERLY/NORTHEASTERLY LOW-LEVEL FLOW IN RESPONSE
   TO SURFACE CYCLONE DEEPENING OVER WESTERN AND CENTRAL NEBRASKA. 
   GUSTY SURFACE WINDS...AT TIMES IN EXCESS OF 30-40+ KT...MAY YIELD
   BLIZZARD OR NEAR BLIZZARD CONDITIONS.

   ..KERR.. 03/31/2014


   ATTN...WFO...ABR...BIS...UNR...BYZ...GGW...

   LAT...LON   46610742 47490366 47880027 45900070 45740283 45310546
               45870717 46610742 

Top/All Mesoscale Discussions/Forecast Products/Home
Weather Topics:
Watches, Mesoscale Discussions, Outlooks, Fire Weather, All Products, Contact Us

NOAA / National Weather Service
National Centers for Environmental Prediction
Storm Prediction Center
120 David L. Boren Blvd.
Norman, OK 73072 U.S.A.
spc.feedback@noaa.gov
Page last modified: March 31, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities