063  
FXUS01 KWBC 130711  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
210 AM EST TUE FEB 13 2018  
 
VALID 12Z TUE FEB 13 2018 - 12Z THU FEB 15 2018  
 
...WARMING TREND FOR THE CENTRAL AND EASTERN U.S. THROUGH  
THURSDAY...  
 
...AFTER A BRIEF WARM UP, A RETURN TO COLDER WEATHER AND SNOW  
EXPECTED FOR THE NORTHERN HIGH PLAINS BEGINNING WEDNESDAY NIGHT...  
 
AN UPPER LEVEL LOW CENTERED OVER THE CALIFORNIA/NEVADA BORDER  
EARLY TUESDAY MORNING WILL RETROGRADE OFFSHORE THROUGH EARLY  
WEDNESDAY MORNING. THE EFFECTS AT THE SURFACE WILL BE FOR WANING  
RAIN AND HIGHER ELEVATION SNOW DURING THE DAY TODAY FROM THE  
SOUTHWEST INTO THE FOUR CORNERS REGION. ADDITIONAL SNOWFALL FOR  
PORTIONS OF THE SAN JUAN MOUNTAINS ABOVE 10,000 FEET IS EXPECTED  
TO RANGE FROM 4 TO 8 INCHES WITH 2 TO 4 INCHES AT LOWER  
ELEVATIONS. AN ADDITIONAL FEW INCHES OF SNOW IS ALSO EXPECTED FOR  
THE WASATCH IN UTAH.  
 
FARTHER NORTH, QUICK MOVING PACIFIC AND CANADIAN COLD FRONTS WILL  
BRING A SHOT OF LIGHT TO MODERATE PRECIPITATION TO THE  
NORTHWESTERN U.S. BEGINNING TUESDAY NIGHT. RAIN SHOULD BE LIMITED  
TO COASTAL WASHINGTON AND OREGON WITH RAINFALL TOTALS GENERALLY  
BELOW 1 INCH. SNOW IS EXPECTED IN THE CASCADES AND FARTHER INLAND  
ALONG THE NORTHERN ROCKIES, WITH SNOWFALL TOTALS VARYING BY  
ELEVATION BUT LIKELY HIGHEST FOR THE NORTHERN WASHINGTON CASCADES  
INTO THE FAR NORTHERN ROCKIES. FARTHER EAST, TEMPERATURES WILL  
WARM TO NEAR AVERAGE TODAY AFTER A VERY COLD START ACROSS NORTHERN  
MONTANA, FOLLOWED BY SLIGHTLY ABOVE AVERAGE TEMPERATURES FOR  
WEDNESDAY. HOWEVER, THE AFOREMENTIONED CANADIAN COLD FRONT WILL  
BRING A RETURN TO BITTER COLD FOR THURSDAY, HIGH TEMPERATURES 20  
DEGREES BELOW AVERAGE FOR EASTERN MONTANA INTO NORTH DAKOTA, ALONG  
WITH LIGHT SNOW.  
 
OUT EAST, AS HIGH PRESSURE EDGES EASTWARD INTO THE ATLANTIC TODAY,  
RETURN FLOW ON THE BACK SIDE OF THE SURFACE RIDGE WILL ALLOW  
MOISTURE AND WARMER AIR TO ADVECT INTO THE GULF COAST STATES AND  
MID-MISSISSIPPI VALLEY TODAY AND THURSDAY. BY WEDNESDAY, HIGH  
TEMPERATURES ARE FORECAST TO RANGE FROM THE 60S TO 70S FROM  
KANSAS, OKLAHOMA AND TEXAS INTO THE OHIO AND TENNESSEE VALLEYS AS  
WELL AS PORTIONS OF THE MID-ATLANTIC REGION. SCATTERED SHOWERS ARE  
EXPECTED FROM THE UPPER TEXAS COAST INTO LOUISIANA TODAY, WITH  
PRECIPITATION EXPANDING NORTH AND EAST FOR WEDNESDAY. TEMPERATURES  
WILL BE WARM ENOUGH FOR THE PRECIPITATION TYPE TO FALL AS ALL RAIN  
AS THE PRECIPITATION MAKES ITS WAY INTO THE OHIO VALLEY WEDNESDAY  
AND THURSDAY.  
 
OTTO  
 
GRAPHICS AVAILABLE AT  
WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP  

 
 
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