086  
FXUS01 KWBC 062000  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
259 PM EST WED MAR 06 2019  
 
VALID 00Z THU MAR 07 2019 - 00Z SAT MAR 09 2019  
 
...ACTIVE WEATHER CONTINUES IN THE WEST, WITH HEAVY SNOW LIKELY IN  
HIGHER ELEVATIONS...  
 
...FREEZE WARNINGS ARE IN PLACE AGAIN ON THURSDAY MORNING FOR THE  
SOUTHEAST; CONVERSELY, THE SOUTHWEST WILL BE WARM WITH THE THREAT  
OF FIRE WEATHER...  
 
MULTIPLE ROUNDS OF PRECIPITATION WILL IMPACT THE WESTERN U.S.  
THROUGH THE END OF THE WORKWEEK, AS UPPER-LEVEL ENERGY AND  
SLOW-MOVING FRONTS WILL HELP FORM LOWER ELEVATION RAIN AND HIGHER  
ELEVATION SNOW. THE HEAVY RAINFALL THREAT IN CALIFORNIA WILL  
LESSEN THROUGH WEDNESDAY EVENING AS MOISTURE DECREASES, BUT THE  
THREAT OF HEAVY SNOWFALL REMAINS ACROSS THE MOUNTAIN RANGES OF THE  
WEST. ADDITIONAL SNOWFALL OF 1 TO 2 FEET IS EXPECTED FOR THE  
SIERRA NEVADA, TETONS/WIND RIVER MOUNTAINS, AND THE CENTRAL  
ROCKIES, AND UP TO A FOOT IS FORECAST FOR THE CASCADES, WASATCH,  
AND SAWTOOTH MOUNTAINS. UPPER-LEVEL ENERGY TRACKING QUICKLY  
EASTWARD OUT OF THE WEST IS EXPECTED TO SPREAD 2 TO 6 INCHES OF  
SNOW INTO THE NORTHERN/CENTRAL PLAINS ON WEDNESDAY NIGHT AND  
THURSDAY, AND THE MIDWEST AND PARTS OF THE OHIO VALLEY COULD SEE 1  
TO 4 INCHES OF SNOW ON THURSDAY INTO FRIDAY. LIGHT SNOW IS ALSO  
POSSIBLE FOR THE CENTRAL APPALACHIANS TO MID-ATLANTIC REGION ON  
FRIDAY. ANOTHER UPPER-LEVEL TROUGH WILL MOVE INTO CALIFORNIA ON  
THURSDAY EVENING AND PROGRESS THROUGH THE WEST ON FRIDAY, AND A  
DEVELOPING SURFACE LOW WILL TRACK EASTWARD WITH IT, INCREASING  
PRECIPITATION CHANCES ONCE AGAIN. THIS IS THE LOW THAT IS EXPECTED  
TO CREATE HEAVY SNOW TO ITS NORTH ACROSS THE NORTHERN/CENTRAL  
PLAINS AND MIDWEST THIS WEEKEND.  
 
FARTHER EAST, SCATTERED SHOWERS ARE EXPECTED TO FORM ALONG THE  
WESTERN GULF COAST WEDNESDAY NIGHT AND SPREAD INTO THE LOWER  
MISSISSIPPI VALLEY AND TENNESSEE VALLEY ON THURSDAY. SCATTERED  
SHOWERS AND THUNDERSTORMS WILL BE ON THE INCREASE FOR THESE AREAS  
AND INTO THE SOUTHEAST AS MOISTURE INCREASES ON FRIDAY.  
ADDITIONALLY, SNOW SHOWERS ARE EXPECTED TO CONTINUE ACROSS THE  
GREAT LAKES REGION WEDNESDAY NIGHT INTO THURSDAY, AND LAKE  
ENHANCEMENT DOWNWIND OF LAKE ONTARIO COULD CAUSE A FEW INCHES OF  
SNOW TO ACCUMULATE THERE.  
 
TEMPERATURE-WISE, COLDER THAN AVERAGE WEATHER IS ONGOING IN THE  
NORTHERN/CENTRAL PLAINS, THOUGH TEMPERATURES WILL BEGIN MODERATING  
SOMEWHAT--BY FRIDAY MORNING, LOW TEMPERATURES WILL ONLY BE 5 TO 10  
DEGREES BELOW AVERAGE. THE EASTERN HALF OF THE U.S. IS ALSO  
EXPECTING BELOW AVERAGE TEMPERATURES ON THURSDAY, AND FREEZE  
WARNINGS ARE IN PLACE ONCE AGAIN FOR THE SOUTHEAST FOR THURSDAY  
MORNING BEFORE THAT AREA WARMS UP ON FRIDAY. MEANWHILE, THE  
SOUTHWEST TO SOUTHERN PLAINS WILL SEE TEMPERATURES OF 10 TO 20  
DEGREES WARMER THAN AVERAGE. ACCORDING TO THE STORM PREDICTION  
CENTER, THERE IS AN ELEVATED TO CRITICAL FIRE WEATHER RISK IN  
THESE AREAS, WHERE THE WARMTH WILL COMBINE WITH DRY HUMIDITIES AND  
GUSTY WINDS.  
 
TATE  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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