630  
FXUS01 KWBC 270758  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
257 AM EST WED FEB 27 2019  
 
VALID 12Z WED FEB 27 2019 - 12Z FRI MAR 01 2019  
   
..HEAVY SNOW CONTINUES FOR HIGHER ELEVATIONS OF THE WEST
 
 
...LIGHT TO MODERATE SNOW WILL SPREAD FROM THE GREAT LAKES TO  
NORTHEAST ON WEDNESDAY AND WEDNESDAY NIGHT...  
 
...SHOWERS AND THUNDERSTORMS EXPECTED FOR THE SOUTHEASTERN U.S.  
THROUGH FRIDAY...  
 
...BELOW AVERAGE TEMPERATURES WILL CONTINUE FOR THE FORESEEABLE  
FUTURE IN THE NORTHERN PLAINS...  
 
AN UPPER-LEVEL LOW WILL SPIN OFF THE COAST OF WASHINGTON STATE  
OVER THE NEXT COUPLE OF DAYS, AND THIS ALONG WITH A SLOW-MOVING  
SURFACE LOW PRESSURE SYSTEM AND ASSOCIATED FRONTS WILL HELP CAUSE  
PRECIPITATION IN THE WEST. COASTAL RAIN IS EXPECTED TO BE LIGHTER  
TODAY THAN THE PAST COUPLE OF DAYS, SO FLOODING IS LESS OF A  
THREAT. HOWEVER, HEAVY SNOW IN THE SIERRA NEVADA WILL CONTINUE,  
AND AN ADDITIONAL 1 TO 3 FEET OF SNOW IS POSSIBLE THERE THROUGH  
FRIDAY MORNING. SMALLER IMPULSES OF UPPER-LEVEL ENERGY WILL  
TRAVERSE THE NORTHWEST ON WEDNESDAY AND ON THURSDAY NIGHT, LEADING  
TO ADDITIONAL HEAVY SNOW OF 1 TO 2 FEET IN THE SAWTOOTH MOUNTAINS  
AND TETONS/WIND RIVER MOUNTAINS THROUGH FRIDAY MORNING AS WELL.  
WITH THE ONGOING COLD WEATHER, LIGHT SNOW IS EVEN POSSIBLE IN THE  
LOWER ELEVATION CITIES OF THE PACIFIC NORTHWEST LIKE SEATTLE AND  
PORTLAND.  
 
ANOTHER REGION WHERE SNOW IS LIKELY IS THE GREAT LAKES REGION AND  
INTO THE NORTHEAST TODAY. THE UPPER GREAT LAKES SHOULD SEE  
RELATIVELY LIGHT SNOW OF 1 TO 4 INCHES, WHILE A SWATH OF 4 TO 6  
INCHES OF SNOW IS EXPECTED IN THE INTERIOR NORTHEAST, WITH HIGHER  
AMOUNTS DOWNWIND OF LAKE ERIE DUE TO LAKE ENHANCEMENT.  
 
COLD TEMPERATURES ARE FORECAST TO CONTINUE ACROSS THE  
NORTHERN/CENTRAL PLAINS AND MAKE THEIR WAY INTO THE UPPER/MIDDLE  
MISSISSIPPI VALLEY, THOUGH THURSDAY WILL BE THE BEST BREAK FROM  
THE ONGOING MUCH BELOW AVERAGE TEMPERATURES. WHILE HIGH  
TEMPERATURES WILL ONLY BE IN THE TEENS ACROSS THE NORTHERN PLAINS  
ON THURSDAY, AND THIS IS BELOW NORMAL, THIS IS ACTUALLY A WARMUP  
FROM THE PAST SEVERAL DAYS, AND A RENEWED SURGE OF DANGEROUSLY  
COLD AIR IS EXPECTED THIS WEEKEND. MEANWHILE, THE SOUTHERN TIER OF  
THE CONUS AND THE OHIO VALLEY WILL BE ABOVE AVERAGE ON WEDNESDAY,  
THOUGH A COLD FRONT SINKING SLOWLY SOUTHWARD WILL COOL DOWN THE  
OHIO VALLEY AND PARTS OF THE LOWER MISSISSIPPI VALLEY AND SOUTHERN  
PLAINS ON THURSDAY.  
 
AS A WARM FRONT MOVES NORTH INTO THE GULF COAST STATES AND MOIST  
AIR FROM THE GULF RETURNS, SHOWERS AND THUNDERSTORMS WILL BE ON  
THE INCREASE ON WEDNESDAY AND THURSDAY FROM THE SOUTHERN PLAINS  
EASTWARD THROUGH THE SOUTHEAST. RAINFALL AMOUNTS THROUGH FRIDAY  
MORNING WILL GENERALLY BE 1 TO 2 INCHES, WITH LOCALLY HIGHER  
AMOUNTS. ON THURSDAY, A FEW STRONG STORMS ARE POSSIBLE FOR THE  
CENTRAL/EASTERN GULF COAST, WHERE THE STORM PREDICTION CENTER HAS  
A MARGINAL RISK OF SEVERE WEATHER. ON THE NORTHERN EDGE OF THE  
PRECIPITATION CHANCES, IN OKLAHOMA AND INTO NORTHERN ARKANSAS AND  
MISSOURI, LIGHT ACCUMULATING FREEZING RAIN IS POSSIBLE IN THE  
COOLER AIR BEHIND A COLD FRONT ON WEDNESDAY AND THURSDAY MORNING.  
FROZEN PRECIPITATION IS ALSO POSSIBLE FOR PARTS OF THE  
MID-ATLANTIC BY THURSDAY NIGHT.  
 
TATE  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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