282  
FXUS01 KWBC 151959  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
259 PM EST TUE JAN 15 2019  
 
VALID 00Z WED JAN 16 2019 - 00Z FRI JAN 18 2019  
 
...HEAVY PRECIPITATION RETURNS TO CALIFORNIA AND 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 ACROSS THE CONTINENTAL U.S., A STRONG COLD FRONT DROPS  
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. 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 BEGIN TO BRING INCREASING MOISTURE  
THROUGH EASTERN TEXAS AND INTO THE CENTRAL PLAINS, WHERE SOME  
SHOWERS ARE LIKELY ON WEDNESDAY. IN ADDITION, THE NORTHERN EXTENT  
OF THE MOISTURE COULD RESULT IN SOME WINTRY PRECIPITATION ACROSS  
THE NORTH-CENTRAL PLAINS ON WEDNESDAY AS WELL.  
 
REINHART/HAMRICK  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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