584  
FXUS01 KWBC 261929  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
228 PM EST FRI JAN 26 2018  
 
VALID 00Z SAT JAN 27 2018 - 00Z MON JAN 29 2018  
 
...A NEW STORM WILL ARRIVE THIS WEEKEND ACROSS THE PACIFIC  
NORTHWEST BRINGING ADDITIONAL HEAVY RAIN AND SNOW...  
 
...HEAVY RAINS AND POSSIBLE FLASH FLOODING WILL IMPACT PARTS OF  
THE GULF COAST STATES...  
 
...BRIEFLY MILDER TEMPERATURES WILL ARRIVE ACROSS THE EAST AS MUCH  
COLDER TEMPERATURES FILTER DOWN ACROSS THE MIDWEST...  
 
HIGH PRESSURE INITIALLY ALONG THE EASTERN SEABOARD WILL ADVANCE  
EAST AND OFFSHORE THIS WEEKEND WHICH WILL ALLOW FOR WARMER  
SOUTHERLY WINDS TO RETURN ACROSS THE EASTERN U.S. OUT AHEAD OF A  
COLD FRONT DROPPING SOUTHEAST ACROSS THE MIDWEST. HIGH  
TEMPERATURES WILL BE AS MUCH AS 10 TO 15 DEGREES ABOVE NORMAL AND  
WILL RANGE FROM THE 40S ACROSS PARTS OF THE NORTHEAST, TO THE 50S  
OVER MOST OF THE MID-ATLANTIC REGION, AND THEN WELL INTO THE 60S  
OVER THE SOUTHEAST. FLORIDA WILL BE THE WARMEST WITH TEMPERATURES  
WELL INTO THE 70S. THE WARMER WEATHER ACROSS THE EAST WILL BE  
SHORT-LIVED THOUGH AS THE AFOREMENTIONED COLD FRONT OVER THE  
MIDWEST ARRIVES ALONG THE ATLANTIC SEABOARD BY SUNDAY.  
 
INCREASING CLOUDS AND A GOOD THREAT OF RAIN CAN BE EXPECTED WITH  
THE COLD FRONT WHICH WILL BE AIDED BY MULTIPLE WAVES OF LOW  
PRESSURE RUNNING UP ALONG THE FRONT ACROSS THE SOUTHEAST. IN FACT,  
HEAVY RAINFALL IS LIKELY ACROSS PARTS OF THE GULF COAST STATES ON  
SATURDAY AND SUNDAY IN ASSOCIATION WITH THE FRONT AND THE  
ATTENDANT WAVES OF LOW PRESSURE. RAINFALL AMOUNTS OF AS MUCH AS 2  
TO 4 INCHES WITH LOCALLY HEAVIER AMOUNTS CAN BE EXPECTED, AND AS A  
RESULT, SOME POTENTIAL FOR FLASH FLOODING DOES EXIST. COLDER  
TEMPERATURES BEHIND THE FRONT WILL FILTER ACROSS THE EAST BY EARLY  
NEXT WEEK.  
 
MEANWHILE, A THEME OF UNSETTLED WEATHER WILL GENERALLY CONTINUE  
FOR THE WEST COAST, GREAT BASIN AND INTERMOUNTAIN REGION THIS  
WEEKEND AS THE NEXT IN A SERIES OF STORM SYSTEMS ARRIVES. THE  
BIGGEST IMPACTS WILL BE TO THE PACIFIC NORTHWEST AND THE NORTHERN  
ROCKIES WHERE HEAVY RAIN FOR THE LOWER ELEVATIONS, INCLUDING THE  
COASTAL RANGES, CAN BE EXPECTED. MEANWHILE, HEAVY SNOWFALL WITH  
ADDITIONAL AMOUNTS OF AS MUCH AS 1 TO 2 FEET CAN BE EXPECTED FOR  
THE HIGHER TERRAIN AND ESPECIALLY THE CASCADES AND FAVORED TERRAIN  
OF THE NORTHERN ROCKIES INCLUDING THE SAWTOOTH, BITTERROOTS AND  
TETONS. TEMPERATURES WILL GENERALLY BE NEAR OR ABOVE NORMAL GIVEN  
THE INFLUX OF MILDER PACIFIC AIR ACROSS MOST OF THE WEST. THE  
WARMEST TEMPERATURES THOUGH WILL AGAIN BE FOUND DOWN ACROSS THE  
DESERT SOUTHWEST WHERE MUCH DRIER CONDITIONS AND PLENTY OF SUN  
WILL ALLOW TEMPERATURES TO REACH AS HIGH AS THE LOW TO MID 80S BY  
SUNDAY AND MONDAY.  
 
ORRISON  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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