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
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