590  
FXUS01 KWBC 071944  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
244 PM EST WED NOV 07 2018  
 
VALID 00Z THU NOV 08 2018 - 00Z SAT NOV 10 2018  
 
...ACCUMULATING SNOW LIKELY FOR PARTS OF KANSAS AND NEBRASKA  
TONIGHT INTO THURSDAY MORNING...  
 
...WELL BELOW AVERAGE TEMPERATURES FOR THE GREAT PLAINS THROUGH  
WEEK'S END...  
 
...DEVELOPING STORM SYSTEM TO BRING A COMBINATION OF SNOW/RAIN TO  
THE GREAT LAKES AND NORTHEAST ON FRIDAY...  
 
...FAVORABLE WEATHER TO PRODUCE WILDFIRES FOR PORTIONS OF  
CALIFORNIA THROUGH FRIDAY...  
 
VERY COLD WEATHER IS EXPECTED TO BE IN PLACE ACROSS THE GREAT  
PLAINS THROUGH AT LEAST THE END OF THE WEEK WITH HIGH TEMPERATURE  
DEPARTURES FROM NORMAL RANGING BETWEEN 10 TO 25 DEGREES BELOW  
AVERAGE FROM THE CANADIAN BORDER TO THE RIO GRANDE. AN UPPER LEVEL  
DISTURBANCE WILL APPROACH THE CENTRAL PLAINS TONIGHT, INCREASING  
SNOWFALL COVERAGE WITH LOCALLY MODERATE INTENSITIES AT TIMES INTO  
THE CENTRAL HIGH PLAINS. 2-4 INCHES OF SNOW, LOCALLY HIGHER, CAN  
BE EXPECTED FROM SOUTHERN NEBRASKA INTO NORTHERN KANSAS BY  
THURSDAY AFTERNOON.  
 
A FRONT WILL REMAIN DRAPED ACROSS THE SOUTHERN U.S. THROUGH  
THURSDAY EVENING WITH LITTLE MOVEMENT WHILE REINFORCING SHOTS OF  
COLDER AIR DROP DOWN FROM THE NORTH. SCATTERED SHOWERS AND  
THUNDERSTORMS WILL BE COMMON NEAR THE FRONTAL BOUNDARY UNTIL IT  
BEGINS TO ADVANCE AHEAD OF AN EVOLVING UPPER LEVEL SYSTEM IN THE  
CENTRAL U.S. THIS WILL SEND THE FRONT SOUTH INTO MEXICO WITH  
SIGNIFICANTLY COLDER TEMPERATURES MOVING INTO TEXAS FOR FRIDAY.  
MEANWHILE, LOW PRESSURE WILL BEGIN TO ORGANIZE OVER THE UPPER OHIO  
VALLEY WITH LIGHT SNOW EXPANDING THROUGH THE UPPER GREAT LAKES  
REGION AND STEADY RAIN AHEAD OF A FORMING COLD FRONT INTO THE  
APPALACHIANS. COASTAL REDEVELOPMENT OF THE SURFACE LOW IS  
ANTICIPATED ALONG THE NORTHERN MID-ATLANTIC COAST FRIDAY EVENING,  
SHIFTING THE FOCUS FOR HEAVIER RAINFALL TO PORTIONS OF NEW  
ENGLAND. PRECIPITATION IN THE HIGHER ELEVATIONS OF THE NORTHEAST  
COULD BEGIN AS SNOW WITH MINOR ACCUMULATIONS THROUGH FRIDAY.  
 
A BLOCKING UPPER LEVEL RIDGE OFF OF THE WEST COAST WILL FAVOR  
CONTINUED DRY WEATHER FOR MOST LOCATIONS WEST OF THE CONTINENTAL  
DIVIDE INTO THE WEEKEND. CRITICAL FIRE WEATHER CONDITIONS ARE  
ALREADY IN PLACE FOR PORTIONS OF THE SACRAMENTO VALLEY INTO THE  
SAN FRANCISCO BAY AREA TODAY AND THIS WILL CONTINUE ON THURSDAY AS  
HIGH PRESSURE STRENGTHENS ACROSS THE SOUTHERN GREAT BASIN.  
HOWEVER, AN EXTREMELY CRITICAL AREA HAS BEEN HIGHLIGHTED BY THE  
STORM PREDICTION CENTER FOR PORTIONS OF SOUTHERN CALIFORNIA ON  
THURSDAY GIVEN FORECASTS OF DEVELOPING SANTA ANA WINDS WITH GUSTS  
UP TO 70 MPH IN THE MOUNTAINS ALONG WITH VERY LOW RELATIVE  
HUMIDITY VALUES. RED FLAG WARNINGS ARE IN EFFECT FOR BOTH  
LOCATIONS OF CALIFORNIA THROUGH AT LEAST FRIDAY MORNING.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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