337
FXUS01 KWBC 270812
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT THU MAR 27 2025
VALID 12Z THU MAR 27 2025 - 12Z SAT MAR 29 2025
...PERIODS OF EXCESSIVE RAINFALL ARE FORECAST TO SLOWLY SHIFT EAST
FROM SOUTHERN TEXAS TODAY, INTO THE UPPER TEXAS COAST ON FRIDAY,
AND INTO LOUISIANA FRIDAY NIGHT AND SATURDAY MORNING...
...SNOW AND ICE EXPECTED TO DEVELOP OVER THE NORTHERN PLAINS CLOSE
TO THE CANADIAN BORDER ON FRIDAY AND THEN EXPAND TOWARD THE UPPER
GREAT LAKES FRIDAY NIGHT...
...WINDY AND WET WEATHER CONTINUES FOR THE PACIFIC NORTHWEST AS
THUNDERSTORMS COULD BECOME SEVERE ACROSS PORTIONS OF THE CENTRAL
PLAINS AND SOUTHERN TEXAS TODAY...
A STRONG RIDGE OF HIGH PRESSURE OVER THE WESTERN U.S. WILL BEGIN
TO SHIFT EASTWARD INTO THE MID-SECTION OF THE COUNTRY THROUGH THE
NEXT COUPLE OF DAYS, BRINGING ANOMALOUS WARMTH INTO THE CENTRAL
PLAINS WHERE RECORD HIGH TEMPERATURES WELL INTO THE 70S TO NEAR
NEAR 90 DEGREES ARE FORECAST AT THE HOTTEST LOCATIONS BY THIS
AFTERNOON. THE DRY AND WARM WEATHER WILL ALSO PROMOTE FIRE DANGER
ACROSS PORTIONS OF THE CENTRAL PLAINS AND HIGH PLAINS. MEANWHILE,
THE PERSISTENT UPPER TROUGH OVER THE EASTERN U.S. IS KEEPING THE
NORTHEAST COOL WITH PASSING SNOW SHOWERS FOR THE INTERIOR SECTIONS.
IN BETWEEN THE WARM RIDGE IN THE WEST AND COLD TROUGH IN THE EAST,
A HEAVY RAIN EVENT IS IN PROGRESS ACROSS SOUTHERN TEXAS AS
VIGOROUS LIFTING MECHANISM ASSOCIATED WITH A SUBTROPICAL JET
STREAM CROSSES MEXICO AND INTERACTS WITH RETURNING MOISTURE FROM
THE GULF INTO SOUTHERN TEXAS. THE HEAVIEST RAINFALL IS FORECAST
TO SHIFT RELATIVELY SLOWLY UP THE TEXAS COAST LATER TODAY INTO
FRIDAY, AND THEN HEADING UP INTO LOUISIANA COAST FRIDAY NIGHT AND
SATURDAY MORNING. BOUTS OF HEAVY RAIN ALONG WITH THE POSSIBILITY
OF SEVERE THUNDERSTORMS ARE EXPECTED TO IMPACT THESE AREAS, WHERE
RAINFALL TOTALS OF 5 INCHES WITH LOCALLY HIGHER AMOUNTS THROUGH
THE NEXT COUPLE OF DAYS.
ACROSS THE PACIFIC NORTHWEST, RAIN AND EMBEDDED STRONG
THUNDERSTORMS AHEAD OF A LARGE PACIFIC CYCLONE HAVE ALREADY BEEN
IMPACTING WESTERN WASHINGTON INTO WESTERN OREGON EARLY THIS
MORNING. PERIODS OF MODERATE TO HEAVY RAIN TOGETHER WITH WINDY
CONDITIONS WILL PERSIST FOR THESE AREAS AS WELL AS DOWN INTO
NORTHERN CALIFORNIA FOR THE NEXT COUPLE OF DAYS. AS COLDER AIR
SLOWLY FILTERS IN, THE HIGHER ELEVATIONS OF THE CASCADES AND
SIERRA NEVADA WILL BEGIN TO SEE WET SNOW. PERIODS OF MIXED RAIN
AND SNOW WILL ALSO SPREAD ACROSS IDAHO AND INTO THE NORTHERN
ROCKIES.
ACROSS THE NORTHERN PLAINS, A ROUND OF WINTRY WEATHER IS EXPECTED
ON FRIDAY AS A POLAR AIRMASS PUSHES SOUTH FROM CANADA AGAINST THE
STRONG WARM RIDGE MOVING INTO THE PLAINS. AN ELONGATED LOW
PRESSURE SYSTEM WILL FORM ALONG THE FRONT AND TRACK EAST ACROSS
THE NORTHERN PLAINS ON FRIDAY, REACHING INTO THE UPPER GREAT LAKES
BY SATURDAY MORNING. SNOW AND ICE ARE EXPECTED TO DEVELOP OVER
THE NORTHERN PLAINS CLOSE TO THE CANADIAN BORDER ON FRIDAY AND
THEN EXPAND TOWARD THE UPPER GREAT LAKES FRIDAY NIGHT. BY
SATURDAY MORNING, ANOTHER LOW PRESSURE SYSTEM IS FORECAST TO
DEVELOP OVER THE CENTRAL HIGH PLAINS WITH MIXED RAIN AND SNOW
EXPANDING FROM THE CENTRAL ROCKIES INTO THE NORTHERN HIGH PLAINS.
IN THE MEANTIME, THUNDERSTORMS COULD BECOME SEVERE ACROSS PORTIONS
OF THE CENTRAL PLAINS AND SOUTHERN TEXAS TODAY AHEAD OF A LIFTING
WARM FRONT. THE COMBINATION OF THE WARM UPPER RIDGE AND AN
BROADENING SOUTHWESTERLY FLOW WILL EVENTUALLY BRING A SPELL OF
VERY WARM WEATHER EASTWARD ACROSS THE MIDWEST AND OHIO VALLEY ON
FRIDAY, REACHING INTO THE EAST COAST BY SATURDAY.
KONG
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