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 73
< Previous MD         Next MD >
MD 73 graphic

   MESOSCALE DISCUSSION 0073
   NWS STORM PREDICTION CENTER NORMAN OK
   1157 PM CST TUE FEB 04 2014

   AREAS AFFECTED...NRN AND NERN PA / SRN AND CNTRL NY / WRN CT / WRN
   MA

   CONCERNING...HEAVY SNOW 

   VALID 050557Z - 051100Z

   SUMMARY...HEAVY SNOWFALL RATES RANGING FROM 1 TO 2 INCHES PER HOUR
   ARE PROBABLE INITIALLY OVER NRN PA AND WILL DEVELOP ENEWD TO THE
   HUDSON RIVER VALLEY BY 11Z.  MIXED P-TYPE MAINLY IN THE FORM OF SNOW
   AND SLEET IS FORECAST OVER E-CNTRL PA ENEWD INTO THE LOWER HUDSON
   RIVER VALLEY.

   DISCUSSION...RADAR MOSAIC AROUND 06Z SHOWS A BROAD MODERATE TO HEAVY
   FROZEN PRECIPITATION SHIELD OVER THE UPPER OH RIVER VALLEY AND A
   SEPARATE BUT MERGING PRECIPITATION ENVELOPE DEVELOPING E OF THE
   ALLEGHENY FRONT FROM S-CNTRL PA INTO NRN VA.  A PRONOUNCED WARM NOSE
   AT H8 SAMPLED BY THE 00Z/05 IAD RAOB WILL SUPPORT SUBSTANTIAL SLEET
   ALONG THE SRN TIER OF THE DISCUSSION AREA /CNTRL PA NEWD INTO WRN
   CT/ ONCE THE COLUMN BECOMES SATURATED IN THE H85-H7 LAYER /REFERENCE
   00Z/05 OKX RAOB/.  STRONG ASCENT OWING TO ISENTROPIC LIFT IN THE
   WARM CONVEYER WILL AUGMENT THE PRODUCTION OF HEAVY SNOWFALL RATES
   /1-2 INCHES PER HOUR/ AS PW INCREASES INTO THE 0.6 TO 0.75 INCH
   RANGE.  FORECAST SOUNDINGS OVER NRN PA ENEWD INTO SRN AND CNTRL NY
   MAINTAIN A SUBFREEZING COLUMN THROUGH 11Z...WHEREAS AREAS FARTHER S
   AND CLOSER TO THE COAST SUPPORT AT LEAST A MIXED P-TYPE.

   ..SMITH.. 02/05/2014


   ATTN...WFO...BOX...OKX...ALY...PHI...BGM...BUF...CTP...PBZ...

   LAT...LON   40437760 41097488 41087334 41267291 42017258 42697269
               43057353 42487784 41847869 41137875 40757833 40437760 

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 20, 2014
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities