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

Mesoscale Discussion 1
         Next MD >
MD 1 graphic

   Mesoscale Discussion 0001
   NWS Storm Prediction Center Norman OK
   0200 AM CST Wed Jan 03 2018

   Areas affected...Northern Florida...much of southern Georgia

   Concerning...Winter mixed precipitation 

   Valid 030800Z - 031400Z

   SUMMARY...Light freezing rain will develop over southern Georgia and
   far northern Florida through morning. A changeover to all snow will
   occur from west to east after 12Z over Georgia and by 18Z into
   southern South Carolina.

   DISCUSSION...Surface analysis currently shows the freezing line
   extending from coastal SC and GA across northern FL, where the air
   is also dry. Showers were beginning to increase in coverage across
   the eastern Gulf of Mexico and over FL, where temperatures were
   mainly above freezing. However, cooling of the dry boundary layer
   should lead to a drop in temperatures, with an effective southward
   trend in the freezing line position.

   Meanwhile, temperatures aloft are above freezing over most of the
   MCD area, with the warm nose located around 850 mb. This should
   result in freezing liquid precipitation, except perhaps on the far
   northern and western fringes where mixed precipitation is possible
   due to colder boundary layer temperatures.

   As the upper trough approaches, temperatures aloft will cool from
   west to east, and lift will be enhanced with a notable increase in
   frontogenetical forcing after 12Z especially over GA. Through 12Z,
   the air mass will continue to gradually moisten with expanding
   precipitation and rates of 0.05" to 0.10"/hr likely with freezing
   rain over southern GA and far northern FL. Beyond 12Z, precipitation
   will transition to snow, perhaps up to 1"/hr into the late morning
   across southeastern GA into southern SC.

   ..Jewell.. 01/03/2018

   ...Please see for graphic product...


   LAT...LON   29778442 30128449 30418447 30738435 31348377 31538334
               31698254 32218110 32118062 31638096 31218128 30238201
               29778258 29628300 29688395 29778442 

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.
Page last modified: January 03, 2018
Information Quality
Privacy Policy
Freedom of Information Act (FOIA)
About Us
Career Opportunities