384
FXUS01 KWBC 180743
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
342 AM EDT MON MAR 18 2024
VALID 12Z MON MAR 18 2024 - 12Z WED MAR 20 2024
...A FEW ROUNDS OF LAKE EFFECT SNOW FORECAST DOWNWIND OF THE GREAT
LAKES OVER THE NEXT FEW DAYS...
...COLD MORNING TEMPERATURES BRING A FROST/FREEZE RISK TO PARTS OF
THE MID-SOUTH AND SOUTHEAST ON TUESDAY...
...RECORD BREAKING WARMTH CONTINUES ACROSS THE PACIFIC NORTHWEST
AND NORTHERN GREAT BASIN...
THE NEW WORKWEEK WILL START OFF BY FEATURING A WEATHER PATTERN
CONSISTING OF HIGH PRESSURE STRETCHING SOUTHWARD FROM THE NORTHERN
PLAINS TO THE GULF COAST. AS A RESULT, CONTINUOUS COLD NORTHWEST
FLOW WILL CREATE LAKE EFFECT SNOW CHANCES THROUGHOUT THE GREAT
LAKES TODAY BEFORE THE NEXT CLIPPER SYSTEM SWINGS OVER THE REGION
AND INTO NORTHERN NEW ENGLAND BY EARLY WEDNESDAY. ACCUMULATING
SNOW IS EXPECTED ACROSS THE TYPICAL SNOW-BELTS DOWNWIND OF LAKES
ERIE AND ONTARIO, AS WELL AS INTO NORTHERN MICHIGAN, WHERE WINTER
WEATHER ADVISORIES HAVE BEEN ISSUED. SNOW SHOWERS COULD EXPAND
INTO THE INTERIOR NORTHEAST AND NORTHERN NEW ENGLAND ON WEDNESDAY
AS THE AFOREMENTIONED CLIPPER SYSTEM SWINGS EASTWARD, WITH THE
POTENTIAL FOR ACCUMULATING SNOWFALL PARTICULARLY IN THE ELEVATED
TERRAIN.
THIS PUSH OF COLD AIR UNDERNEATH AND JUST EAST OF THE HIGH
PRESSURE SETTLING OVER THE DEEP SOUTH ON TUESDAY WILL ALLOW FOR
SUBFREEZING TEMPERATURES TO EXTEND AS FAR SOUTH AS THE LOWER
MISSISSIPPI VALLEY AND SOUTHEAST. FROST/FREEZE CONDITIONS COULD
DAMAGE AND/OR KILL ANY UNPROTECTED SENSITIVE VEGETATION, PROMPTING
FREEZE WATCHES AND WARNINGS TO EXTEND FROM ARKANSAS TO THE
CAROLINAS. THIS COLD ISN'T ANTICIPATED TO BE LONG-LIVED AS
TEMPERATURES GRADUALLY WARM BY MIDWEEK.
CONVERSELY, WELL ABOVE AVERAGE SPRING WARMTH IS EXPECTED TO
CONTINUE THROUGHOUT THE NORTHWEST THROUGH TUESDAY WITH HIGHS
REACHING INTO THE 70S. THESE TEMPERATURES COULD THREATEN DAILY
RECORD HIGHS TODAY IN PORTLAND, OR AND SPOKANE, WA. ONE FINAL DAY
OF SUMMER-LIKE WARMTH IS ALSO EXPECTED IN SOUTHERN FLORIDA TODAY
AHEAD OF A COLD FRONT AS HIGHS APPROACH 90 DEGREES. THIS FRONT MAY
SPARK THUNDERSTORMS THAT COULD CONTAIN ISOLATED HAIL AND DAMAGING
WINDS FOR PARTS OF THE FLORIDA PENINSULA. LASTLY, LIGHT SHOWER
ACTIVITY IS FORECAST TO CONTINUE ACROSS SOUTHERN TEXAS, AS WELL AS
SCATTERED RAIN AND MOUNTAIN SNOW SHOWERS THROUGH THE SOUTHWEST
OVER THE NEXT FEW DAYS AS AN UPPER LEVEL LOW MEANDERS OVER THE
REGION.
SNELL
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