354  
FXUS01 KWBC 280752  
PMDSPD  
 
SHORT RANGE FORECAST DISCUSSION  
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD  
250 AM EST TUE JAN 28 2020  
 
VALID 12Z TUE JAN 28 2020 - 12Z THU JAN 30 2020  
 
...SERIES OF STORM SYSTEMS TO PRODUCE PERIODS OF RAIN AND SNOW  
ACROSS THE NORTHWEST...  
 
...ACCUMULATING SNOWFALL WILL BLANKET PARTS OF THE  
CENTRAL/SOUTHERN PLAINS...  
 
...LAKE EFFECT SNOW AND NORTH-CENTRAL APPALACHIANS SNOW SHOWERS TO  
CONTINUE INTO TUESDAY...  
 
AN ACTIVE PACIFIC JET STREAM PATTERN WILL PUSH WAVE AFTER WAVE OF  
PRECIPITATION TO THE PACIFIC NORTHWEST AND NORTHERN ROCKIES  
THROUGH THE MIDDLE OF THE WEEK. COASTAL REGIONS AND VALLEYS CAN  
EXPECT MOSTLY RAIN WITH A COUPLE OF INCHES OF RAIN POSSIBLE  
THROUGH THURSDAY MORNING. THE HIGHER ELEVATIONS OF THE CASCADES  
SHOULD SEE SNOWFALL AMOUNTS IN EXCESS OF A FOOT WHILE THE HIGHER  
TERRAIN OF THE NORTHERN ROCKIES AND INTO THE TETONS MAY SEE SNOW  
APPROACHING A FOOT. AN UPPER-LEVEL TROUGH MOVING ASHORE TODAY IN  
THE NORTHWEST WILL DIVE SOUTH THROUGH THE ROCKIES TUESDAY NIGHT  
AND INTO THE SOUTHWEST ON WEDNESDAY WITH TO SCATTERED RAIN SHOWERS  
AND MOUNTAIN SNOW POSSIBLE.  
 
FARTHER SOUTH, A LOW PRESSURE SYSTEM IS GATHERING STRENGTH AND  
WILL BRING WIDESPREAD SHOWERS AND A FEW THUNDERSTORMS TO MUCH OF  
TEXAS, AS WELL AS SOUTHERN AND EASTERN OKLAHOMA TODAY. ON THE  
STORM'S NORTHERN EDGE, A WINTRY MIX OF SNOW AND SLEET/FREEZING  
RAIN POSSIBLE ACROSS THE NORTHERN EDGE OF THE PRECIPITATION SHIELD  
EXTENDING INTO THE CENTRAL PLAINS. FREEZING RAIN AMOUNTS SHOULD  
GENERALLY BE LIGHT THOUGH A SWATH OF SNOWFALL ACCUMULATIONS OF 2  
TO 6 INCHES, WITH LOCALLY HIGHER AMOUNTS, ARE POSSIBLE ACROSS  
SOUTHWEST KANSAS AND INTO THE OKLAHOMA AND NORTH TEXAS PANHANDLES.  
THE STORM WILL PUSH THROUGH THE LOWER MISSISSIPPI VALLEY AND GULF  
COAST TUESDAY NIGHT WITH RAIN ON THE STORM'S SOUTHERN FLANK AND A  
LIGHT WINTRY MIX ON ITS NORTHERN FLANK. BY WEDNESDAY, THE WINTRY  
HAZARDS WILL DIMINISH BUT AREAS OF RAIN WILL CONTINUE ACROSS THE  
SOUTHEAST. COLDER TEMPERATURES WILL FUNNEL IN BEHIND THE STORM  
WITH PARTS OF SOUTHERN AND CENTRAL PLAINS SEEING DAYTIME HIGHS 10  
TO 20 DEGREES BELOW NORMAL BY THURSDAY.  
 
ELSEWHERE, FAVORABLE NORTHWESTERLY FLOW ACROSS THE STILL  
RELATIVELY WARM GREAT LAKES WILL GENERATE LAKE EFFECT SNOW SHOWERS  
DOWNWIND OF PARTICULARLY LAKES ERIE AND ONTARIO THROUGH TODAY WITH  
AN ADDITIONAL INCH OR TWO OF SNOW ACCUMULATION POSSIBLE. SNOW  
SHOWERS WILL FINALLY DISSIPATE TUESDAY NIGHT AS HIGH PRESSURE  
BUILDS IN OVER THE NORTHEASTERN U.S. AND EASTERN CANADA. IN THE  
NORTHERN PLAINS, WARM AIR ADVECTING INTO THE REGION SHOULD BRING  
DAYTIME HIGHS 5 TO 10 DEGREES ABOVE NORMAL. WHILE PARTS OF THE  
SOUTHERN PLAINS WILL BE CHILLY ON THURSDAY, THE CONTIGUOUS U.S.  
WILL REMAIN VOID OF ANY ARCTIC AIR-MASSES THROUGH THE REMAINDER OF  
THE WEEK.  
 
MULLINAX  
 
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