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 69
< Previous MD         Next MD >
MD 69 graphic

   MESOSCALE DISCUSSION 0069
   NWS STORM PREDICTION CENTER NORMAN OK
   0712 PM CST TUE FEB 04 2014

   AREAS AFFECTED...N-CNTRL AND NERN OH / W-CNTRL AND NWRN PA / FAR WRN
   NY

   CONCERNING...HEAVY SNOW 

   VALID 050112Z - 050715Z

   SUMMARY...HEAVY SNOWFALL RATES AROUND 1 INCH PER HOUR ARE FORECAST
   TO BEGIN WITHIN THE NEXT FEW HOURS OVER N-CNTRL OH AND SPREAD
   DOWNSTREAM ACROSS NERN OH AND AREAS IN NWRN PA AND FAR WRN NY. 
   LOCALIZED SNOWFALL RATES MAY INTERMITTENTLY APPROACH 2 INCHES PER
   HOUR OVER NERN OH AND NWRN PA PRIOR TO 06Z.

   DISCUSSION...RADAR MOSAIC SHOWS A BROAD SWATH OF MODERATE TO HEAVY
   WINTER PRECIP OVER IN/OH/KY DEVELOPING NEWD ACROSS S-CNTRL OH EARLY
   THIS EVENING.  THE 00Z/05 ILN RAOB DEPICTED A LARGELY SATURATED
   COLUMN WITH A H85 WARM NOSE /-0.5 DEG C/.  THE RAPID NWD FLUX OF
   RELATIVELY HIGH MOISTURE CONTENT /PW 1.3 INCH BNA RAOB/ ADVECTING
   INTO THE UPPER OH VALLEY VIA A 75 KT LLJ WILL SUPPORT
   INCREASING/HEAVY PRECIP RATES ACROSS THE REGION TONIGHT AS
   ASCENT/WAA INCREASES.  

   THE 18Z NAM APPEARED TO REASONABLY CAPTURE THE THERMAL STRUCTURE OF
   THE LOWER TROPOSPHERE OVER SWRN OH EARLY THIS EVENING COMPARED TO
   THE 00Z ILN RAOB.  18Z NAM MODEL SOUNDINGS INDICATE A CHANGEOVER
   FROM SNOW TO A MIXTURE OF SLEET/SNOW OVER CNTRL OH TOWARDS 04Z. 
   OBSERVATIONS WITHIN THE PAST 30 MINUTES IN DAYTON AND CINCINNATI
   INDICATE A CHANGEOVER TO SLEET IS IN THE PROCESS OF
   OCCURRING--CONFIRMING THIS NOTION OF MIXED P-TYPE MOVING INTO SWRN
   OH.  FARTHER N...A COLDER COLUMN WILL MAINTAIN SNOW AS THE PRECIP
   TYPE AND RATES WILL LIKELY INCREASE INTO THE 1.0 TO 1.5 INCH PER
   HOUR RANGE BY MID EVENING.  SOME CONVECTIVE ENHANCEMENT MAY LOCALLY
   BOOST RATES TO NEAR 2 INCHES PER HOUR AROUND MIDNIGHT OVER NERN OH
   AND FAR NWRN PA.

   ..SMITH.. 02/05/2014


   ATTN...WFO...BUF...CTP...PBZ...CLE...ILN...

   LAT...LON   41147805 39888285 40518340 41218326 42417908 42247819
               41757782 41147805 

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