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 86
< Previous MD         Next MD >
MD 86 graphic

   MESOSCALE DISCUSSION 0086
   NWS STORM PREDICTION CENTER NORMAN OK
   0932 AM CST SAT FEB 21 2015

   AREAS AFFECTED...ERN WV...WRN VA

   CONCERNING...HEAVY SNOW 

   VALID 211532Z - 212030Z

   SUMMARY...PERIODS OF HEAVY SNOW WILL PERSIST THROUGH AFTERNOON WITH
   RATES AROUND 1-2 IN/HR BEFORE TEMPERATURES RISE TO ABOVE FREEZING
   LATER TODAY.

   DISCUSSION...VERY STRONG SWLY LOW-LEVEL FLOW JUST ABOVE THE SURFACE
   CONTINUES TO TRANSPORT MOISTURE NEWD ACROSS THE OH/TN VALLEYS AND
   ACROSS APPALACHIANS. SURFACE ANALYSIS SHOWS THE FREEZING LINE
   CURRENTLY ACROSS CNTRL WV BUT MUCH COLDER AIR REMAINS ENTRENCHED
   FROM ERN WV INTO VA. 

   AS A RESULT OF THE STRONG WARM ADVECTION TO THE W AND THE ARCTIC AIR
   TO THE E...A TIGHT TEMPERATURE GRADIENT IS EXPECTED TO PERSIST OVER
   ERN WV AND WILL MAINTAIN FAVORABLE TEMPERATURE PROFILES FOR SNOW.
   THETA-E ADVECTION WILL ALSO BE MAINTAINED INTO THE AREA ALONG WITH
   TERRAIN EFFECTS HELPING TO PRODUCE HEAVY SNOW RATES.

   ..JEWELL.. 02/21/2015


   ATTN...WFO...LWX...RNK...PBZ...RLX...

   LAT...LON   37317923 37267936 37187957 36838038 36828098 36958150
               37278173 37638165 37968125 38438074 38908012 39017948
               38817886 38387853 37847874 37317923 

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: February 21, 2015
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities