239  
FXUS01 KWBC 300718  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
317 AM EDT TUE OCT 30 2018  
 
VALID 12Z TUE OCT 30 2018 - 12Z THU NOV 01 2018  
   
..HEAVY SNOWFALL LIKELY FOR PORTIONS OF THE SOUTHERN ROCKIES
 
 
...WIDESPREAD HEAVY TO EXCESSIVE RAINFALL POSSIBLE FROM THE OHIO  
VALLEY TO THE GULF COAST WITH SEVERE THUNDERSTORMS POSSIBLE FROM  
EAST TEXAS TO LOUISIANA ON WEDNESDAY...  
 
SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP TODAY ALONG A  
STRONG FRONTAL BOUNDARY FROM THE UPPER MIDWEST TO THE CENTRAL  
PLAINS, ALONG WITH HEAVY SNOWFALL ACROSS PORTIONS OF THE COLORADO  
AND NORTHERN NEW MEXICO MOUNTAINS. AS MUCH AS 1 TO 2 FEET OF SNOW  
IS POSSIBLE IN THE HIGHEST ELEVATIONS, WHERE WINTER WEATHER  
ADVISORIES AND WINTER STORM WATCHES ARE IN EFFECT.  
 
AS THE FRONT CONTINUES ADVANCING EASTWARD THE NEXT FEW DAYS,  
WIDESPREAD SHOWERS AND THUNDERSTORMS ARE LIKELY ALONG THE BOUNDARY  
FROM THE GREAT LAKES AND THE OHIO VALLEY SOUTHWARD TO THE WESTERN  
AND CENTRAL GULF COAST. HEAVY TO EXCESSIVE RAINFALL/FLASH FLOODING  
IS POSSIBLE WITH WPC HIGHLIGHTING A SLIGHT RISK EXTENDING FROM  
PORTIONS OF NORTHEAST TEXAS AND THE LOWER MISSISSIPPI VALLEY INTO  
PORTIONS OF THE OHIO VALLEY ON WEDNESDAY. STRONG TO SEVERE  
THUNDERSTORMS WILL ALSO BE A THREAT, ESPECIALLY ACROSS PARTS OF  
EASTERN TEXAS INTO THE LOWER MISSISSIPPI VALLEY WHERE SPC HAS A  
SLIGHT TO ENHANCED RISK FOR SEVERE WEATHER ON WEDNESDAY. THIS MAY  
HAMPER ANY OUTDOOR HALLOWEEN RELATED ACTIVITIES PLANNED FOR  
WEDNESDAY EVENING. SHOWERS AND STORMS WILL BEGIN MOVING INTO THE  
NORTHEAST BY WEDNESDAY EVENING, WITH HEAVY RAINFALL CONTINUING  
ACROSS THE TENNESSEE VALLEY AND GULF COAST STATES INTO THURSDAY AS  
WELL. THE BACKSIDE OF THIS FRONT FEATURES A MUCH COLDER AIRMASS,  
WITH AFTERNOON HIGHS BY THURSDAY AS MUCH AS 10 TO 20 DEGREES BELOW  
NORMAL ACROSS PORTIONS OF THE CENTRAL AND SOUTHERN ROCKIES INTO  
THE PLAINS.  
 
UNSETTLED WEATHER OUT WEST WILL CONTINUE TO SUPPORT SCATTERED RAIN  
AND HIGHER ELEVATION SNOW ON TUESDAY FOR PARTS OF THE NORTHWEST  
AND NORTHERN ROCKIES. ANOTHER ROUND OF POTENTIALLY HEAVY  
PRECIPITATION ARRIVES BY WEDNESDAY FOR THE PACIFIC NORTHWEST WITH  
ORGANIZED RAINFALL LIKELY TO FOCUS ALONG THE FAVORED TERRAIN OF  
WESTERN WASHINGTON AND OREGON. WARM AND DRY CONDITIONS WILL ALSO  
PERSIST ACROSS PORTIONS OF CALIFORNIA ALONG WITH AN ELEVATED TO  
CRITICAL FIRE WEATHER THREAT. RED FLAG WARNINGS ARE IN EFFECT FOR  
PARTS OF NORTHERN CALIFORNIA.  
 
SANTORELLI  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab HPC Page Main Text Page