862  
FXUS01 KWBC 300759  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
258 AM EST SUN DEC 30 2018  
 
VALID 12Z SUN DEC 30 2018 - 12Z TUE JAN 01 2019  
 
...COLD FRONT WILL SPREAD WIND AND SNOW THROUGH THE NORTHERN  
ROCKIES TODAY...  
 
...MUCH COLDER TEMPERATURES FOR THE HIGH PLAINS INTO THE ROCKIES  
ON NEW YEAR'S EVE...  
 
...VERY MILD TEMPERATURES EAST OF THE MISSISSIPPI ON MONDAY ALONG  
WITH POTENTIALLY HEAVY RAIN AND THUNDERSTORMS...  
 
A STRONG COLD FRONT CURRENTLY MOVING THROUGH THE PACIFIC NORTHWEST  
WILL CONTINUE TO DROP SOUTHWARD AND EASTWARD TODAY. THIS WILL  
BRING WINDY CONDITIONS TO MUCH OF THE INTERIOR WEST FROM MONTANA  
SOUTHWARD TO WYOMING THROUGH THE DAY. WINDS MAY GUST AS HIGH AS  
70MPH ARE POSSIBLE IN WIND PRONE AREAS. SNOW WILL FOLLOW ALONG THE  
PATH OF THE COLD FRONT TODAY WITH SEVERAL INCHES TO OVER A FOOT  
POSSIBLE IN THE MOUNTAINS BUT MUCH LIGHTER AMOUNTS IN VALLEY  
LOCATIONS. ANY RAIN OR RAIN/SNOW MIX WILL CHANGE OVER AS COLDER  
AIR RUSHES IN BEHIND THE FRONT. THE PRECIPITATION WILL AVOID  
CALIFORNIA AND MOST OF NEVADA GIVEN ITS TRAJECTORY FROM THE  
NORTH/NORTHWEST BUT COOLER AIR WILL EVEN SPILL OVER THE SIERRAS BY  
MONDAY, ALBEIT TO A LESSER DEGREE. THIS SYSTEM WILL CONTINUE  
SINKING SOUTHWARD TOMORROW AND BRING YET ANOTHER CHANCE OF SNOW TO  
THE FOUR CORNERS REGION, ESPECIALLY FROM THE HIGHER TERRAIN OF THE  
MOGOLLON RIM/WHITE MOUNTAINS IN ARIZONA THROUGH NEW MEXICO  
NORTHWARD INTO COLORADO (SAN JUAN AND SANGRE DE CRISTO MOUNTAINS).  
TO THE NORTH, LIGHTER SNOW WILL SPREAD EASTWARD ACROSS THE DAKOTAS  
INTO MINNESOTA ALONG THE ARCTIC BOUNDARY.  
 
FARTHER EAST, THE WEATHER WILL TURN MUCH MILDER AND WETTER AS A  
STORM SYSTEM MOVES  
OUT OF THE WESTERN GULF OF MEXICO LATER TODAY THROUGH THE LOWER  
MISSISSIPPI VALLEY. RAINFALL WILL EXPAND IN COVERAGE AN INTENSITY  
TODAY AS A WARM FRONT HEADS NORTH THROUGH ALABAMA/GEORGIA. HEAVY  
RAIN IS POSSIBLE THAT COULD INDUCE FLASH FLOODING IN LOCALIZED  
AREAS. OTHERWISE, A LARGE AREA OF MODEST RAIN WILL SPREAD  
NORTHWARD WITH TOTALS OF 1-2" POSSIBLE. RAINFALL MAY BE ENHANCED  
BY THUNDERSTORMS, POSSIBLY SEVERE, ESPECIALLY ON MONDAY. RAINFALL  
WILL PUSH INTO THE OHIO VALLEY AND THEN THE NORTHEAST AS THE  
SURFACE LOW DEEPENS ON MONDAY AS IT TRACKS TOWARD THE EASTERN  
GREAT LAKES. THIS COULD SPELL A RATHER WET THOUGH MILD NEW YEAR'S  
EVE BY MIDNIGHT FOR PARTYGOERS IN THE NORTHEAST (E.G., NEW YORK  
CITY). FARTHER SOUTH, MUCH OF FLORIDA WILL REMAIN PROTECTED FROM  
THE RAINFALL TO THE NORTH WHICH WILL ALLOW TEMPERATURES TO RISE TO  
NEAR RECORD LEVELS FOR THE END OF DECEMBER -- GENERALLY LOW TO MID  
80S.  
 
FRACASSO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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