255  
FXUS01 KWBC 160908  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION...AMENDED  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
407 AM EST WED JAN 16 2019  
 
VALID 12Z WED JAN 16 2019 - 12Z FRI JAN 18 2019  
   
..MAJOR WINTER STORM FOR CALIFORNIA WEDNESDAY AND THURSDAY
 
   
..COLD ACROSS THE NORTHERN TIER OF THE NATION
 
 
A MAJOR WINTER STORM WILL HAMMER MUCH OF CALIFORNIA THROUGH EARLY  
THURSDAY AS A DEEP SURFACE LOW TRACKS TOWARDS THE COAST. AN  
IMPRESSIVE SURGE OF DEEP MOISTURE AHEAD OF THE COLD FRONT THROUGH  
WEDNESDAY NIGHT WILL PRODUCE WIDESPREAD HEAVY RAIN ACROSS THE  
LOWER ELEVATIONS OF THE WEST COAST STATES, WITH 2 TO 4 INCHES OF  
RAIN LIKELY FOR MANY AREAS. A BROAD SLIGHT RISK AREA FOR  
EXCESSIVE RAINFALL ENCOMPASSES MUCH OF CENTRAL CALIFORNIA, AND A  
MODERATE RISK FOR THE MOUNTAINOUS TERRAIN NEAR LOS ANGELES, ALONG  
WITH THE POSSIBILITY OF MUD SLIDES.  
 
BLIZZARD CONDITIONS ARE EXPECTED FOR THE HIGHER ELEVATIONS OF THE  
SIERRA NEVADA THROUGH EARLY THURSDAY WITH A FEW/SEVERAL FEET OF  
NEW SNOW AND WINDS IN EXCESS OF 50 MPH FORECAST. VERY HEAVY SNOW  
IS ALSO EXPECTED FOR THE MOUNTAINS OF NORTHERN CALIFORNIA AND  
EXTENDING NORTHWARD ACROSS THE CASCADES. AS THE STORM SYSTEM  
MOVES INLAND ACROSS THE INTERMOUNTAIN WEST, HEAVY SNOW IS EXPECTED  
FROM NEVADA ACROSS UTAH, SOUTHERN IDAHO, WESTERN WYOMING, AND  
WESTERN COLORADO, AND THESE COULD BE HEAVY AT TIMES WITH OVER A  
FOOT OF SNOW AT HIGHER ELEVATIONS.  
 
ELSEWHERE ACROSS THE NATION, FRIGID TEMPERATURES WILL REMAIN IN  
PLACE ACROSS THE DAKOTAS AND THE UPPER MIDWEST AFTER THE PASSAGE  
OF A STRONG COLD FRONT. IN FACT, HIGH TEMPERATURES WILL BE NEARLY  
10-20 DEGREES BELOW NORMAL. THERE SHOULD BE ENOUGH MOISTURE WITH  
THIS FRONT TO PRODUCE SOME LIGHT SNOW OVER THE LOWER GREAT LAKES  
AND ACROSS NEW ENGLAND.  
 
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 AND THEN THE MID-ATLANTIC  
REGION. ALONG THE NORTHERN PORTIONS OF THE GREAT LAKES AND OHIO  
VALLEY, EXPECT SOME SNOW AND A WINTRY MIX WITH THIS SYSTEM FROM  
THURSDAY NIGHT AND INTO FRIDAY.  
 
HAMRICK/REINHART  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  
 

 
 
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