Storm Prediction Center Mesoscale Discussion 48

   Mesoscale Discussion 0048
   NWS Storm Prediction Center Norman OK
   0846 AM CST Tue Jan 21 2025

   Areas affected...Southeast Louisiana...southern Mississippi and far
   southern Alabama

   Concerning...Heavy snow 

   Valid 211446Z - 211845Z

   SUMMARY...Moderate to heavy snow to continue this morning and
   through the afternoon. Some blowing and drifting is also expected.

   DISCUSSION...An expansive region of light to occasionally moderate
   snow has spread across much of the central Gulf coast this morning.
   Expect precipitation rates to increase through the late morning and
   afternoon with widespread moderate to occasionally heavy snowfall
   rates expected. In addition, some stronger winds, particularly
   closer to the coast will lead to some blowing and drifting. Areas
   with northward exposure (ex. southern short of Lake Pontchartrain)
   may see some localized blizzard conditions through the day. 

   Some mixed precipitation is being observed from southern Terrebonne
   Parish to southern St. Bernard Parish where a warm nose (seen just
   below 700mb on the LIX 12Z RAOB) is slightly above freezing. 60
   knots of southwesterly flow in this warm nose will attempt to
   maintain its presence across the region while temperatures aloft
   continue to cool. Expect the cold air to eventually win out with
   snow likely across all of southern Louisiana by later this
   afternoon.

   ..Bentley.. 01/21/2025

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...MOB...JAN...LIX...LCH...

   LAT...LON   31019159 31519076 31608898 31238781 30798754 30218756
               30198828 30138865 29938871 29528885 29078901 28908909
               28948999 29049087 29309164 29419195 30419196 31019159