547
FXUS01 KWBC 170748
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
348 AM EDT SUN MAR 17 2024
VALID 12Z SUN MAR 17 2024 - 12Z TUE MAR 19 2024
...LOCALLY HEAVY SNOW CONTINUES ACROSS THE SOUTHERN ROCKIES TODAY,
WHILE LAKE EFFECT SNOW IMPACTS THE GREAT LAKES REGION THROUGH
EARLY THIS WEEK...
...STRONG COLD FRONT USHERS IN FROST/FREEZE POTENTIAL THROUGHOUT
THE SOUTHEAST BY TUESDAY...
...SCATTERED SHOWERS AND THUNDERSTORMS FORECAST ACROSS THE GULF
COAST STATES THIS ST. PATRICK'S DAY...
EVEN AS THE SPRING EQUINOX APPROACHES THIS TUESDAY, WINTER WEATHER
CONTINUES TO IMPACT PARTS OF THE NATION WITH LOCALIZED HEAVY SNOW.
THE SAME CLOSED UPPER LOW THAT HAS LINGERED OVER THE SOUTHWEST
OVER THE LAST FEW DAYS IS EXPECTED TO CONTINUE PRODUCING AREAS OF
HEAVY MOUNTAIN SNOW THROUGHOUT THE SOUTHERN ROCKIES AND FOUR
CORNERS REGION TODAY BEFORE THE SYSTEM WEAKENS AND PRECIPITATION
BECOMES WIDELY SCATTERED. THE HEAVIEST REMAINING SNOW IS EXPECTED
OVER THE MOUNTAINOUS TERRAIN OF NEW MEXICO, WHICH COULD LEAD TO
TREACHEROUS TRAVEL AT TIMES. MEANWHILE, A POTENT LOW PRESSURE
SYSTEM CROSSING FROM SOUTHERN ONTARIO TO SOUTHERN QUEBEC, CANADA
TODAY WILL AID IN LAKE EFFECT SNOW DOWNWIND OF THE GREAT LAKES
THROUGH EARLY THIS WEEK. THE COLD AIRMASS ADVECTING FROM THE
NORTHWEST ACROSS THE RELATIVELY WARM LAKES WILL ALLOW FOR NUMEROUS
SNOW SHOWERS AND LOCALIZED AREAS OF MODERATE TO HEAVY SNOW.
SPECIFICALLY, THE U.P. OF MICHIGAN AND TUG HILL PLATEAU OF WESTERN
NEW YORK COULD SEE SEVERAL INCHES OF ACCUMULATION SNOW. SNOWFALL
CHANCES ALSO EXTEND TO UPSLOPE PORTIONS OF THE CENTRAL
APPALACHIANS ON MONDAY AND TUESDAY.
AS A COLD FRONT PUSHES SOUTH AND CLEARS THE SOUTHEAST BY MONDAY,
MUCH COLDER TEMPERATURES AND HIGH PRESSURE WILL BUILD IN ITS WAKE.
LOW TEMPERATURES ARE FORECAST TO DIP INTO THE 20S AND 30S FROM THE
MIDWEST TO THE TENNESSEE VALLEY ON MONDAY, PRIOR TO THIS COLD
SINKING INTO THE MID-SOUTH AND SOUTHEAST ON TUESDAY. VEGETATION IN
THESE REGIONS ARE SUSCEPTIBLE TO FROST/FREEZE DAMAGE GIVEN THE
RELATIVELY MILD LATE WINTER TEMPERATURES, THUS ANY UNPROTECTED
SENSITIVE PLANTS COULD BE DAMAGED OR KILLED. MEANWHILE, WARM
TEMPERATURES WILL REMAIN LOCKED IN PLACE OVER THE PACIFIC
NORTHWEST, WHERE HIGHS INTO THE LOW 70S ARE FORECAST AND
ANTICIPATED TO SPREAD INTO THE NORTHERN HIGH PLAINS BY MONDAY.
ONE MORE DAY OF SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED TODAY
ALONG THE GULF COAST AS A LINGERING FRONTAL BOUNDARY FOCUSES
RAINFALL CHANCES. HEAVY RAIN COULD LEAD TO FLOODING CONCERNS FROM
SOUTHEAST TEXAS TO SOUTHERN LOUISIANA DUE TO SATURATED SOILS FROM
RECENT RAINFALL. A SLIGHT RISK (LEVEL 2 OF 4) OF EXCESSIVE
RAINFALL IS IN EFFECT. A FEW ISOLATED SEVERE THUNDERSTORMS COULD
ALSO IMPACT THE IMMEDIATE GULF COAST REGION AS WELL THIS ST.
PATRICK'S DAY.
SNELL
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