400
FXUS01 KWBC 160800
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
358 AM EDT MON OCT 16 2023
VALID 12Z MON OCT 16 2023 - 12Z WED OCT 18 2023
...A COOL AUTUMN AIR-MASS WILL BE SLOW TO DEPART THE EASTERN HALF
OF THE COUNTRY WITH SCATTERED SHOWERS IN PARTS OF THE NORTHEAST,
GREAT LAKES, AND CENTRAL APPALACHIANS...
...WARM AND DRY ACROSS MUCH OF THE WESTERN U.S. BUT RAINY
CONDITIONS OVER THE PACIFIC NORTHWEST...
...A WARMING TREND EXPECTED IN THE GREAT PLAINS AS A ROUND OF RAIN
REACHES INTO THE NORTHERN PLAINS LATE TUESDAY...
AN EXPANSIVE AREA OF NORTH TO NORTHWESTERLY FLOW BETWEEN A
DEPARTING STORM SYSTEM OFF THE CANADIAN MARITIMES AND A HIGH
PRESSURE RIDGE AXIS ANCHORED OVER THE HIGH PLAINS WILL CONTINUE TO
DIRECT A DOME A COOL AUTUMN AIR MASS FARTHER SOUTH TOWARD THE GULF
COAST. ONE MORE MORNING OF BELOW FREEZING TEMPERATURES CAN BE
EXPECTED OVER THE CENTRAL HIGH PLAINS TODAY BEFORE THE RESERVOIR
OF WARM AIR OVER MUCH OF THE WESTERN U.S BEGINS TO SLOWLY FILTER
INTO THE GREAT PLAINS. THE WARMING PROCESS, HOWEVER, WILL BE SLOW
TO OCCUR AS THE WEATHER PATTERN THAT SUSTAINS THE MASSIVE DOME OF
COOL AUTUMN AIR OVER THE EASTERN HALF OF THE COUNTRY TAKES TIME TO
BREAK DOWN. UNDER THIS WEATHER PATTERN, SCATTERED SHOWERS WILL
ONCE AGAIN BE FOUND TODAY FROM INTERIOR NEW ENGLAND TO THE LOWER
GREAT LAKES, DOWN ACROSS THE OHIO VALLEY, AND AS FARTHER SOUTH AS
THE SOUTHERN APPALACHIANS. EVEN SOME WET SNOW IS POSSIBLE NEAR
THE PEAKS OF THE CENTRAL AND SOUTHERN APPALACHIANS THROUGH TUESDAY
MORNING. THE RAIN SHOULD HOLD OFF ALONG THE EASTERN SEABOARD BUT
PARTLY TO OCCASIONALLY MOSTLY CLOUDY CONDITION WILL PREVAIL TODAY
BEFORE THE HIGH PRESSURE RIDGE FINALLY SLIDES ACROSS THE REGION
LATER ON TUESDAY WITH A BETTER CHANCE OF SEEING BREAKS INTO CLOUDS.
WHILE MUCH OF THE INTERIOR WESTERN U.S. HAS BEEN DRY, MOISTURE
ASSOCIATED WITH A PAIR OF FRONTS AHEAD OF AN UPPER TROUGH WILL
BRING WINDY AND RAINY CONDITIONS INTO THE PACIFIC NORTHWEST AND
DOWN INTO THE NORTHWESTERN CALIFORNIA TODAY. THIS LATEST ROUND OF
RAIN IS FORECAST TO END LATER ON TUESDAY FROM OREGON SOUTHWARD BUT
THE OLYMPIC PENINSULA IN WASHINGTON WILL REMAIN RAINY THROUGH
WEDNESDAY MORNING WITH THE ARRIVAL OF A WARM FRONT WELL AHEAD OF
THE NEXT PACIFIC SYSTEM. MEANWHILE, A PIECE OF THE LEAD UPPER
TROUGH WILL PENETRATE FARTHER INLAND, BRINGING A ROUND OF RAIN AND
HIGH-ELEVATION WET SNOW ACROSS IDAHO AND MONTANA MONDAY NIGHT INTO
EARLY TUESDAY. BY TUESDAY NIGHT INTO EARLY WEDNESDAY, AN ALBERTA
CLIPPER IS FORECAST TO SLIDE SOUTHEASTWARD INTO THE FAR NORTHERN
PLAINS WHERE A ROUND OF RAIN CAN BE EXPECTED. SOUTHERLY FLOW
DEVELOPING AHEAD OF THE ALBERTA CLIPPER AND A LEE TROUGH NEAR THE
FOOTHILLS OF THE ROCKIES WILL ALLOW WARM AIR TO FILTER INTO THE
HIGH PLAINS ON TUESDAY, RESULTING IN AFTERNOON HIGH TEMPERATURES
WELL INTO THE 80S BY TUESDAY AFTERNOON WITH DRY CONDITIONS
CONTINUE. MEANWHILE, ABOVE NORMAL TEMPERATURES WILL CONTINUE OVER
THE DESERT SOUTHWEST WHERE HIGH TEMPERATURES WILL TOP THE CENTURY
MARK FOR THE NEXT FEW DAYS.
KONG
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