730  
FXUS01 KWBC 031946  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
245 PM EST SAT MAR 03 2018  
 
VALID 00Z SUN MAR 04 2018 - 00Z TUE MAR 06 2018  
 
...HEAVY SNOW EXPECTED FOR THE GREAT BASIN, NORTHERN ROCKIES AND  
NORTHERN PLAINS OVER THE NEXT COUPLE OF DAYS...  
 
...WIDESPREAD SHOWERS AND EMBEDDED THUNDERSTORMS DEVELOPING LATER  
THIS WEEKEND OVER THE MISSISSIPPI VALLEY AND SPREADING EASTWARD  
THROUGH THE OHIO AND TENNESSEE VALLEYS MONDAY...  
 
...MUCH CALMER WEATHER LIKELY OVER THE NORTHEAST AND MID-ATLANTIC  
REGION THIS PERIOD AS THE POWERFUL ATLANTIC STORM CONTINUES TO  
PULL AWAY FROM THE EAST COAST...  
 
A POWERFUL UPPER TROUGH ENTERING THE WESTERN U.S. WILL MAKE ITS  
WAY STEADILY ACROSS THE INTERMOUNTAIN WEST/ROCKIES THROUGH THE  
REMAINDER OF THE WEEKEND, THEN PUSH OUT INTO THE PLAINS AND  
MISSISSIPPI VALLEYS DURING THE FIRST PART OF NEXT WEEK. THE STRONG  
UPPER LEVEL ENERGY ASSOCIATED WITH THIS SYSTEM WILL SUPPORT  
WIDESPREAD SNOWFALL OVER THE CENTRAL GREAT BASIN AND NORTHERN  
ROCKIES ON SUNDAY. THE HEAVIEST AMOUNTS, UPWARDS OF A FOOT OR  
MORE, WILL TEND TO FOCUS IN THE HIGHER ELEVATIONS ALONG A FRONTAL  
BOUNDARY SETTING UP ACROSS WESTERN WYOMING AND CENTRAL UTAH, WITH  
UPSLOPE FLOW HELPING TO SUPPORT SNOWS OF 6-12 INCHES FARTHER  
NORTHWARD THROUGH CENTRAL MONTANA. ON MONDAY, THIS STORM WILL  
INTENSIFY FURTHER AND PUSH OUT INTO THE PLAINS, WITH HEAVY SNOW  
AND INCREASINGLY WINDY CONDITIONS EXPECTED FOR EASTERN MONTANA  
THROUGH THE DAKOTAS AND INTO THE UPPER MISSISSIPPI VALLEY.  
 
FARTHER SOUTH...STRENGTHENING WESTERLY FLOW OUT AHEAD OF THIS  
VIGOROUS SYSTEM AND ITS ASSOCIATED COLD FRONT, ALONG WITH VERY LOW  
RELATIVE HUMIDITIES, WILL BRING A THREAT FOR DANGEROUS FIRE  
WEATHER CONDITIONS TO PARTS OF THE CENTRAL AND SOUTHERN HIGH  
PLAINS ON SUNDAY. CONDITIONS WILL IMPROVE SOMEWHAT AS WINDS  
DIMINISH WITH THE PASSAGE OF THE FRONT ON MONDAY. MEANWHILE,  
INCREASING SOUTHERLY FLOW WILL HELP LIFT MOISTURE FROM THE GULF OF  
MEXICO ACROSS THE MISSISSIPPI VALLEY ON SUNDAY NIGHT AND MONDAY.  
AS THE FRONT MAKES ITS WAY EASTWARD, IT WILL HELP TO TRIGGER  
WIDESPREAD SHOWERS AND EMBEDDED THUNDERSTORMS ACROSS THIS AREA.  
SINCE THE SYSTEM IS MOVING PRETTY QUICKLY, IT IS UNLIKELY THAT ANY  
RAINS THAT DO FALL WILL NOT BE HIGH ENOUGH TO CAUSE FLOODING OR  
FLASH FLOODING CONCERNS.  
 
OVER THE EASTERN U.S., ASIDE FROM SOME BREEZY CONDITIONS ALONG  
COASTAL SECTIONS OF THE NORTHEAST AND MID-ATLANTIC, THE WEATHER  
THE NEXT COUPLE OF DAYS WILL BE RELATIVELY DRY AND CALM. A WEAK  
COLD FRONT DROPPING OUT OF EASTERN CANADA MAY BRING A LITTLE SNOW  
TO PARTS OF THE NORTHEAST ON SUNDAY, BUT AMOUNTS SHOULD BE LIGHT.  
 
KLEIN  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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