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 147
< Previous MD         Next MD >
MD 147 graphic

   MESOSCALE DISCUSSION 0147
   NWS STORM PREDICTION CENTER NORMAN OK
   0111 PM CST WED FEB 24 2016

   AREAS AFFECTED...PORTIONS OF MAINE AND NRN NH

   CONCERNING...FREEZING RAIN 

   VALID 241911Z - 242315Z

   SUMMARY...AREAS OF FREEZING RAIN WILL SPREAD ACROSS PORTIONS OF NRN
   NEW ENGLAND THROUGH LATE THIS AFTERNOON.

   DISCUSSION...THE ERN PERIPHERY OF A BROAD WARM-ADVECTION PLUME --
   LOCATED WELL E OF A DEEP CYCLONE CROSSING PARTS OF THE OHIO 
   VALLEY -- IS SUPPORTING AREAS OF PRECIP ACROSS NEW ENGLAND. ONE AREA
   OF PRECIP IS ADVANCING ENEWD ACROSS PARTS OF CNTRL/NRN MAINE...WITH
   A MORE WIDESPREAD SHIELD OF PRECIP DEVELOPING NWD/NEWD FROM NY AND
   SRN NEW ENGLAND. MEANWHILE...THE SFC-PRESSURE PATTERN IMPLIES
   RESIDUAL COLD-AIR-DAMMING IN MANY LOCATIONS NEAR/E OF THE
   APPALACHIANS WITHIN THE MCD AREA...ASSOCIATED WITH SUB-FREEZING SFC
   TEMPERATURES ACROSS THE REGION. GIVEN ONLY MODEST LOW-LEVEL
   MASS-FIELD ADJUSTMENTS -- OWING TO STRONGER FORCING FOR ASCENT
   DISPLACED WELL TO THE W OF THE AREA -- SUB-FREEZING SFC TEMPERATURES
   SHOULD CONTINUE THROUGH THE AFTERNOON. THE COLDEST READINGS WILL BE
   LIKELY IN SHELTERED VALLEYS AND OTHER LOWER ELEVATIONS. FORECAST
   SOUNDINGS SUGGEST THAT AN ELEVATED WARM LAYER WILL CONTINUE TO
   FOSTER MELTING OF DESCENDING HYDROMETEORS THAT WILL FREEZE ON
   CONTACT WITH THE SFC LAYER AS FREEZING RAIN. FREEZING-RAIN RATES OF
   0.02 TO LOCALLY 0.05 INCH PER HOUR WILL BE POSSIBLE AS PRECIP
   ADVANCES ACROSS THE REGION THROUGH LATE AFTERNOON.

   ..COHEN.. 02/24/2016


   ATTN...WFO...CAR...GYX...

   LAT...LON   46336779 45366810 44486981 44557125 45087142 45377099
               45957019 46366950 46586863 46336779 

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 24, 2016
Disclaimer
Information Quality
Help
Glossary
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities