160  
FXUS01 KWBC 302000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
259 PM EST TUE JAN 30 2018  
 
VALID 00Z WED JAN 31 2018 - 00Z FRI FEB 02 2018  
 
...WET PATTERN TO CONTINUE ACROSS THE OLYMPICS AND WASHINGTON  
CASCADES...  
 
...SNOWFALL LIKELY OVER THE GREAT LAKES, PARTICULARLY ACROSS THE  
UPPER PENINSULA OF MICHIGAN...  
 
...A SHIFT TO BELOW AVERAGE TEMPERATURES EXPECTED OVER THE  
NORTH-CENTRAL STATES BY THURSDAY...  
 
A STEADY CONVEYOR BELT OF PACIFIC ENERGY WILL CONTINUE TO PUSH  
THROUGH THE NORTHWESTERN U.S., THUS KEEPING PRECIPITATION CHANCES  
IN THE FORECAST. PERSISTENT ONSHORE FLOW AGAINST THE WESTWARD  
SLOPES OF THE OLYMPICS AND WASHINGTON CASCADES WILL SPREAD  
LIGHT/MODERATE RAIN AND SNOW TO THESE REGIONS. CONDITIONS BECOME  
SLIGHTLY LESS FAVORABLE INTO THURSDAY AS THE LOW-LEVEL WINDS  
WEAKEN AND BEGIN TO GENERALLY PARALLEL THE COASTLINE. DURING THE  
NEXT COUPLE OF DAYS, EXPECT 1 TO 2 FEET OF SNOW OVER THE MENTIONED  
MOUNTAIN RANGES WITH SOME LIGHTER AMOUNTS ACROSS THE UPPER  
INTERMOUNTAIN WEST.  
 
A POTENT UPPER TROUGH SWINGING THROUGH CENTRAL CANADA WILL  
CONTINUE TO MAINTAIN A STRONG AREA OF LOW PRESSURE ALTHOUGH MUCH  
OF THE IMPACTS SHOULD REMAIN NORTH OF THE INTERNATIONAL BORDER. A  
BROAD AXIS OF PRECIPITATION SHOULD FALL ALONG THE ATTENDANT COLD  
FRONT WITH WET CONDITIONS POSSIBLE FROM THE CENTRAL GULF COAST UP  
THROUGH THE CENTRAL APPALACHIANS AND INTO NEW ENGLAND. SOME OF THE  
BIGGEST IMPACTS WILL BE THE WINTRY PRECIPITATION FALLING WITHIN  
THE DOME OF COLDER AIR ACROSS THE GREAT LAKES. 6 TO 10 INCHES OF  
SNOW IS POSSIBLE OVER THE UPPER PENINSULA OF MICHIGAN DOWN ACROSS  
NORTHERN SECTIONS OF LOWER MICHIGAN.  
 
AS THE COLD FRONT AND THE TRAILING SECONDARY BOUNDARY SWEEP  
THROUGH THE CENTER OF THE COUNTRY, A MARKED CHANGE IN THE  
TEMPERATURES WILL BE EVIDENT. MODIFIED ARCTIC AIR ENCOMPASSING THE  
REGION SHOULD LOWER READINGS TO AROUND 15 TO 20 DEGREES BELOW  
AVERAGE ACROSS THE NORTHERN PLAINS, UPPER MIDWEST, AND UPPER GREAT  
LAKES BY THURSDAY. THIS SHOULD BE THE TRUE COLD SPOT ACROSS THE  
NATION AS HIGHS STRUGGLE TO GET OUT OF THE SINGLE DIGITS.  
OTHERWISE, A VAST MAJORITY OF THE COUNTRY CAN EXPECT TEMPERATURES  
ABOVE CLIMATOLOGY, PARTICULARLY OVER THE SOUTHWESTERN STATES  
EASTWARD INTO THE SOUTHERN PLAINS. GIVEN WARM AND BREEZY  
CONDITIONS ACCOMPANIED BY LOW RELATIVE HUMIDITY VALUES, THE STORM  
PREDICTION CENTER IS ADVERTISING AN ELEVATED TO CRITICAL RISK FOR  
WILDFIRES ANYWHERE FROM THE SOUTHERN/CENTRAL ROCKIES EASTWARD INTO  
THE ADJACENT GREAT PLAINS.  
 
LASTLY, A STRONG SYSTEM CURRENTLY EXITING THE NORTHEASTERN U.S.  
SHOULD KEEP SOME WINTRY PRECIPITATION THREAT ALONG THE NEW ENGLAND  
COAST INTO THIS EVENING WHILE MORE SCATTERED ACTIVITY LOOMS IN ITS  
WAKE. A STEADY NORTHWESTERLY WIND SHOULD ENSURE COOL CONDITIONS  
FOR THE REGION WHICH WILL ALSO LOWER WIND CHILL TEMPERATURES.  
 
RUBIN-OSTER  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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