039  
FXUS01 KWBC 152003  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
302 PM EST TUE JAN 15 2019  
 
VALID 00Z WED JAN 16 2019 - 00Z FRI JAN 18 2019  
   
..HEAVY PRECIPITATION RETURNS TO CALIFORNIA
 
 
   
..ARCTIC AIR SURGES SOUTH ACROSS THE NORTHERN PLAINS
 
 
AN ACTIVE WEATHER PATTERN IS EXPECTED ESPECIALLY FOR CALIFORNIA  
OVER THE NEXT FEW DAYS. THROUGH TOMORROW MORNING, A FRONTAL  
BOUNDARY WILL PUSH TOWARD SOUTHERN CALIFORNIA AND BRING MODERATE  
RAINFALL AND HIGHER ELEVATION SNOW ACROSS THIS REGION.  
ADDITIONALLY, RAIN AND HIGHER ELEVATION SNOW IS ALSO EXPECTED FOR  
NORTHERN CALIFORNIA. THIS PRECIPITATION WILL ALSO BRING HEAVY SNOW  
ALONG THE SIERRA NEVADA MOUNTAIN RANGE--BRINGING UPWARDS OF TWO  
FEET OF SNOW TO THE HIGHEST ELEVATIONS. THERE ARE THERE WILL BE A  
LIGHT BREAK IN PRECIPITATION BY WEDNESDAY, BUT LATER IN THE DAY  
AND THURSDAY MORE ROUNDS OF RAIN AND HIGHER ELEVATION SNOW ARE  
EXPECTED AS A STRONG FRONTAL BOUNDARY MOVES THROUGH THE WESTERN  
U.S. IN FACT, THIS SYSTEM WILL BRING EVEN MORE SNOWFALL TO THE  
SIERRA NEVADA MOUNTAINS--WHERE THERE IS A WINTER STORM WATCH IN  
EFFECT. THE GREAT BASIN AND PORTIONS OF THE INTERMOUNTAIN WEST CAN  
ALSO EXPECT RAIN AND HIGHER ELEVATION SNOW DURING THE SHORT TERM  
PERIOD.  
 
ELSEWHERE, A STRONG COLD FRONT WILL MOVE SOUTHWARD ACROSS THE  
PLAINS ON TUESDAY AND INTO EARLY WEDNESDAY, BRINGING FRIGID  
TEMPERATURES TO THE DAKOTAS AND THE UPPER MIDWEST BY THE MIDDLE  
PART OF THE WEEK. IN FACT, HIGH TEMPERATURES WILL BE NEARLY 15-20  
DEGREES BELOW NORMAL. THERE SHOULD BE ENOUGH MOISTURE WITH THIS  
FRONT TO PRODUCE SOME MIXED PRECIPITATION OVER THE LOWER GREAT  
LAKES AND SNOW SHOWERS BEHIND THE FRONT OVER NORTHERN MICHIGAN.  
 
WITH A LARGE SURFACE HIGH OVER THE GULF COAST REGION, RETURN FLOW  
FROM THE GULF OF MEXICO WILL BRING AN INCREASE IN MOISTURE THROUGH  
EASTERN TEXAS AND INTO THE CENTRAL PLAINS, WHERE SOME SHOWERS ARE  
LIKELY ON WEDNESDAY. PRECIPITATION WILL SPREAD NORTH AND EAST  
ACROSS THE MISSISSIPPI VALLEY ON THURSDAY AS A FRONT PUSHES  
EASTWARD ACROSS THE MISSISSIPPI VALLEY EASTWARD INTO THE  
MID-ATLANTIC. ALONG THE NORTHERN PORTIONS OF THE GREAT LAKES AND  
OHIO VALLEY, EXPECT SNOW AND A WINTRY MIX WITH THIS SYSTEM FROM  
THURSDAY NIGHT AND INTO FRIDAY.  
 
REINHART/HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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