848
FXUS01 KWBC 070815
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
300 AM EST SAT DEC 07 2024
VALID 12Z SAT DEC 07 2024 - 12Z MON DEC 09 2024
...PERIODS OF MIXED RAIN AND SNOW LINGER FROM THE GREAT LAKES TO
NORTHERN NEW ENGLAND THROUGH THE WEEKEND...
...HEAVY RAIN THREAT EMERGES ACROSS THE DEEP SOUTH LATE SUNDAY
INTO MONDAY...
...UNSETTLED AND WINDY WEATHER SPREADING ACROSS THE PACIFIC
NORTHWEST THIS WEEKEND WILL REACH INTO THE NORTHERN PLAINS AS SNOW
BY MONDAY...
...ARCTIC AIR ACROSS THE EASTERN U.S. WILL GIVE WAY TO ABOVE
NORMAL TEMPERATURES BY MONDAY...
AS AN ARCTIC HIGH PRESSURE SYSTEM MODERATES AND RETREATS ACROSS
THE EASTERN PORTION OF THE COUNTRY, UNSETTLED WEATHER WILL EMERGE
AND EXPAND ACROSS THE DEEP SOUTH AS WELL AS THE PACIFIC NORTHWEST.
MOISTURE RETURNING BEHIND THE HIGH PRESSURE SYSTEM TODAY WILL
BEGIN TO INTERACT WITH AN UPPER-LEVEL TROUGH AND A COASTAL FRONT
JUST OFF THE TEXAS COAST. THIS WILL RESULT IN EXPANDING AREAS OF
LIGHT TO MODERATE RAIN WITH EMBEDDED THUNDERSTORMS ACROSS THE
EASTERN TWO-THIRDS OF TEXAS TODAY. THE ENTIRE SYSTEM WILL SHIFT
NORTHEASTWARD ON SUNDAY BEFORE EVOLVING INTO A HEAVY RAIN THREAT
ACROSS THE LOWER MISSISSIPPI VALLEY TOWARD THE TENNESSEE VALLEY BY
LATE SUNDAY INTO EARLY MONDAY. A COUPLE OF INCHES OF RAIN IS
EXPECTED IN THIS GENERAL VICINITY WITH LOCALLY HIGHER AMOUNTS
THROUGH MONDAY MORNING.
MEANWHILE, PERIODS OF MIXED RAIN AND SNOW ARE EXPECTED TO LINGER
ACROSS THE GREAT LAKES AND INTO NORTHERN NEW ENGLAND WHERE A
CLIPPER LOW PRESSURE SYSTEM IS FORECAST TO TRACK ALONG A NEARLY
STATIONARY ARCTIC FRONT. UP TO A FOOT OF NEW SNOW IS POSSIBLE
NEAR THE CANADIAN BORDER IN THESE AREAS.
THE PACIFIC NORTHWEST IS ENTERING A PERIOD OF INCREASINGLY
UNSETTLED WEATHER AS A RATHER DYNAMIC UPPER TROUGH ARRIVES FROM
THE PACIFIC. LOW-ELEVATION RAIN AND HIGH-ELEVATION HEAVY SNOW CAN
BE EXPECTED FOR THE CASCADES AND NORTHERN IDAHO AS THE WEEKEND
PROGRESSES WITH WINDY CONDITIONS. THE MOUNTAIN SNOW AND
LOW-ELEVATION RAIN WILL PROGRESS FARTHER INLAND INTO THE NORTHERN
ROCKIES EARLY SUNDAY AS A LOW PRESSURE SYSTEM BEGINS TO DEVELOP
ACROSS THE NORTHERN HIGH PLAINS INTO ALBERTA PROVINCE OF CANADA.
WINTER STORM WARNINGS AND ADVISORIES ARE ACTIVE ACROSS THE
NORTHERN ROCKIES THROUGH SATURDAY WHERE SEVERAL INCHES OF SNOWFALL
AND SOME ICING POTENTIAL WILL CREATE HAZARDOUS TRAVEL CONDITIONS.
MEANWHILE, MUCH OF THE REMAINDER OF THE WESTERN U.S. WILL REMAIN
DRY AND MILDER THAN NORMAL AS HIGH PRESSURE DOMINATES. BY SUNDAY
NIGHT INTO MONDAY MORNING, A LOW PRESSURE SYSTEM IS FORECAST TO
TRACK ACROSS THE NORTHERN PLAINS WITH SNOW AND WIND. MAINLY LIGHT
SNOWFALL AMOUNTS ARE EXPECTED FOR NORTH DAKOTA INTO MONTANA, WITH
HIGH AMOUNTS ENHANCED BY LOCAL TERRAINS.
LOW TEMPERATURES IN THE 20S AS FAR SOUTH AS THE FLORIDA PANHANDLE
THIS MORNING HAVE PROMPTED FREEZE WARNINGS FOR PORTIONS OF
NORTHERN FLORIDA INTO GEORGIA. HIGH TEMPERATURES WILL BEGIN TO
MODERATE ACROSS THE EAST BY SUNDAY AS ANOMALOUSLY MILD
TEMPERATURES ACROSS THE CENTRAL U.S. SHIFT EASTWARD INTO THE
REGION. HIGHS SHOULD BE IN THE 60S AND 70S SUNDAY ACROSS THE
SOUTHEAST AND 50S AND 40S ACROSS THE MID-ATLANTIC AND NORTHEAST,
WHILE 50S AND 60S WILL EXPAND ACROSS THE NORTHERN AND CENTRAL
PLAINS SUNDAY AFTERNOON AHEAD OF THE DEVELOPING LOW PRESSURE
SYSTEM.
KONG
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page