476  
FXUS01 KWBC 150738  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
237 AM EST MON JAN 15 2018  
 
VALID 12Z MON JAN 15 2018 - 12Z WED JAN 17 2018  
 
...ANOTHER ROUND OF SIGNIFICANT COLD TO IMPACT THE PLAINS AND  
MIDWEST EARLY THIS WEEK...  
 
...WINTRY MIX EXPECTED FOR PORTIONS OF CENTRAL AND SOUTHERN TEXAS  
INTO THE LOWER MISSISSIPPI VALLEY MONDAY NIGHT AND TUESDAY...  
 
A COLD FRONT WILL STEADILY DROP SOUTHWARD TODAY, REACHING CENTRAL  
TEXAS BY THIS EVENING, AND THE WESTERN GULF COAST BY TUESDAY  
MORNING. GUSTY NORTHERLY WINDS WILL USHER IN ARCTIC AIR BEHIND THE  
COLD FRONT WITH MAXIMUM TEMPERATURES FORECAST TO BE ROUGHLY 15 TO  
30 DEGREES BELOW MID-JANUARY AVERAGES TODAY ACROSS THE CENTRAL AND  
NORTHERN PLAINS. GIVEN THIS IS THE COLDEST TIME OF YEAR FROM A  
CLIMATOLOGICAL PERSPECTIVE, THIS TRANSLATES INTO HIGHS BELOW ZERO  
FOR MUCH OF THE DAKOTAS WITH BELOW FREEZING HIGHS AS FAR SOUTH AS  
THE NORTHERN TEXAS PANHANDLE INTO NORTHERN ARKANSAS FOR THE DAY  
TODAY.  
 
AS THE COLD FRONT MOVES SOUTHWARD THROUGH TEXAS TONIGHT, IT WILL  
ENCOUNTER GREATER MOISTURE MOVING NORTH FROM THE WESTERN GULF OF  
MEXICO, ALLOWING FOR A WINTRY MIX OF PRECIPITATION EXTENDING FROM  
CENTRAL TEXAS, ACROSS THE ARKLATEX AND INTO THE LOWER MISSISSIPPI  
VALLEY. SNOW SHOULD BE THE MAIN PRECIPITATION TYPE FROM FAR  
NORTHEASTERN TEXAS INTO AND ACROSS THE MISSISSIPPI RIVER VALLEY,  
BUT SLEET AND FREEZING RAIN ARE EXPECTED FOR CENTRAL AND SOUTHERN  
TEXAS STARTING TONIGHT AND LASTING INTO EARLY TUESDAY NIGHT. MINOR  
ACCUMULATIONS COULD CAUSING SIGNIFICANT TRAVEL DELAYS GIVEN THESE  
PARTS OF THE SOUTH ARE NOT ACCUSTOMED TO HANDLING ICY CONDITIONS.  
 
THE MODIFIED ARCTIC AIR WILL SPREAD SOUTH AND EAST THROUGH  
WEDNESDAY, WEAKENING SOME IN ITS POTENCY AS IT REACHES THE EAST  
COAST. HOWEVER, TEMPERATURES WILL BE COLD ENOUGH TO SUPPORT SNOW  
ACROSS THE CENTRAL APPALACHIANS INTO THE NORTHERN MID-ATLANTIC  
REGION WITH ACCUMULATIONS POSSIBLE BY LATE WEDNESDAY MORNING. A  
COASTAL LOW IS EXPECTED TO ORGANIZE OFF OF THE NEW ENGLAND COAST  
DURING THE DAY ON WEDNESDAY WHICH COULD BRING SOME MODERATE  
SNOWFALL ACCUMULATIONS TO NEW ENGLAND FOR MID-WEEK.  
 
MEANWHILE, TEMPERATURES WILL FOLLOW A WARMING TREND FOR THE  
NORTHERN PLAINS INTO MID-WEEK WHILE TEMPERATURES ACROSS THE WEST  
REMAIN ABOVE AVERAGE. RAIN ASSOCIATED WITH A COLD FRONT WILL REACH  
THE WEST COAST TONIGHT BUT STAY RELATIVELY LIGHT AS THE FRONT  
DISSIPATES INLAND. AFTER A SHORT BREAK, A SECOND AND STRONGER PUSH  
OF MOISTURE IS EXPECTED TO IMPACT THE WEST COAST BEGINNING MID TO  
LATE IN THE DAY ON WEDNESDAY.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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