240  
FXUS01 KWBC 290645  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
244 AM EDT MON OCT 29 2018  
 
VALID 12Z MON OCT 29 2018 - 12Z WED OCT 31 2018  
 
...LOCALLY HEAVY PRECIPITATION ALONG THE FAVORED TERRAIN OUT WEST  
WILL CONTINUE, WITH HEAVY SNOWS DEVELOPING ACROSS THE SOUTHERN  
ROCKIES BY TUESDAY...  
 
LOCALLY HEAVY PRECIPITATION WILL CONTINUE TO IMPACT PORTIONS OF  
THE NORTHERN ROCKIES ON MONDAY AS A COLD FRONT CROSSES THE REGION  
WITH LIGHT SNOW ACCUMULATIONS POSSIBLE IN THE HIGHEST TERRAIN.  
EVEN WITH THE FRONT WELL TO THE EAST, ONSHORE FLOW WILL CONTINUE  
TO SUPPORT HEAVY PRECIPITATION PARTICULARLY ALONG THE FAVORED  
TERRAIN OF THE PACIFIC NORTHWEST ON MONDAY. THERE SHOULD BE A  
BRIEF BREAK IN THE PRECIPITATION ON TUESDAY BEFORE A SECOND  
FRONTAL SYSTEM BRINGS ANOTHER ROUND OF HEAVY PRECIPITATION TO THE  
PACIFIC NORTHWEST BY WEDNESDAY. AS THIS SYSTEM USHERS IN A COOLER  
AIRMASS, NEAR TO BELOW NORMAL TEMPERATURES WILL SPREAD EASTWARD  
FROM THE NORTHWEST ON MONDAY INTO THE GREAT BASIN AND CENTRAL  
ROCKIES ON TUESDAY. WARM AND DRY CONDITIONS WILL PERSIST ACROSS  
MUCH OF CALIFORNIA AND THE SOUTHWEST WILL ELEVATED FIRE WEATHER  
CONCERNS ON MONDAY FOR PORTIONS OF SOUTHERN CALIFORNIA.  
 
WELL ABOVE NORMAL TEMPERATURES AS MUCH AS OF 10 TO 25 DEGREES  
ABOVE AVERAGE ACROSS THE PLAINS STATES ON MONDAY WILL DROP TO MORE  
NEAR NORMAL VALUES BY TUESDAY FOLLOWING THE PASSAGE OF THE WESTERN  
U.S. SYSTEM. AS THE FRONT MOVES ACROSS THE PLAINS AND INTO THE  
MIDWEST, SHOWERS AND THUNDERSTORMS ARE FORECAST TO DEVELOP FROM  
THE GREAT LAKES BACK TO THE CENTRAL/SOUTHERN PLAINS BY TUESDAY,  
WITH HEAVY SNOWFALL EXPECTED BY LATE TUESDAY IN THE COLORADO AND  
NORTHERN NEW MEXICO FRONT RANGE MOUNTAINS. AS MUCH AS A FOOT OR  
MORE SNOW COULD FALL IN THE HIGHEST PEAKS.  
 
OUT IN THE EAST, RAIN AND SCATTERED THUNDERSTORMS WILL ACCOMPANY A  
FAST MOVING LOW PRESSURE SYSTEM MOVING INTO THE NORTHEAST EARLY  
MONDAY. GUSTY WINDS ON THE BACKSIDE OF THIS SYSTEM WILL CONTINUE  
INTO MONDAY, ESPECIALLY ACROSS THE HIGHER TERRAIN WHERE WIND  
ADVISORIES ARE IN EFFECT FOR PORTIONS OF THE CENTRAL AND SOUTHERN  
APPALACHIANS.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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