759
FXUS01 KWBC 120756
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
356 AM EDT FRI APR 12 2024
VALID 12Z FRI APR 12 2024 - 12Z SUN APR 14 2024
...POWERFUL LOW PRESSURE SYSTEM TO PRODUCE GUSTY WINDS AND HEAVY
RAIN ACROSS PARTS OF THE GREAT LAKES, OHIO VALLEY, AND NORTHEAST
THROUGH FRIDAY...
...LOWER ELEVATION RAIN AND MOUNTAIN SNOW TO ENTER CALIFORNIA ON
SATURDAY...
...WELL ABOVE AVERAGE TEMPERATURES FORECAST TO SURGE INTO THE
NORTHERN/CENTRAL PLAINS THIS WEEKEND...
A BROAD AREA OF SHOWERS AND THUNDERSTORMS ACROSS THE MIDWEST AND
INTO THE NORTHEAST WILL CONTINUE FRIDAY AS A DEEP CYCLONE OVER THE
GREAT LAKES SLOWLY SHIFTS INTO CANADA. SHOWERS SHOULD TAPER OFF
FROM WEST TO EAST ACROSS THE GREAT LAKES/OHIO VALLEY AS THE LOW
DEPARTS, WITH MORE MODERATE TO HEAVY RAINFALL MOST LIKELY ALONG
THE APPALACHIANS INTO THE LOWER GREAT LAKES. THE HEAVIEST RAINFALL
IS EXPECTED AHEAD OF A TRAILING COLD FRONT THROUGH NEW ENGLAND
WHERE AN INFLUX OF MOIST SOUTHEASTERLY FLOW OFF THE ATLANTIC ALONG
UPSLOPE PORTIONS OF THE NORTHERN APPALACHIANS CONTRIBUTES TO SOME
MORE POTENT STORMS AND RAIN TOTALS. A SLIGHT RISK OF EXCESSIVE
RAINFALL (LEVEL 2/4) HAS BEEN ISSUED FOR PORTIONS OF NEW HAMPSHIRE
AND MAINE ALONG AND AHEAD OF THE WHITE MOUNTAINS WHERE THE
COMBINATION OF HEAVY RAIN AND SNOWMELT COULD LEAD TO SOME
INSTANCES OF FLOODING. SOME LIGHTER LINGERING SHOWERS WILL LAST
INTO SATURDAY, PARTICULARLY FOR INTERIOR PORTIONS OF THE
NORTHEAST. CONDITIONS WILL ALSO REMAIN BREEZY ACROSS THE REGION
WITH WIND ADVISORIES IN PLACE FOR PORTIONS OF THE GREAT LAKES,
APPALACHIANS, AND NEW ENGLAND.
IN THE WEST, SOME LIGHT LOWER ELEVATION RAIN SHOWERS AND HIGHER
ELEVATION/MOUNTAIN SNOW SHOWERS WILL BE POSSIBLE ALONG A FRONTAL
SYSTEM PUSHING SOUTHWARD THROUGH PORTIONS OF THE NORTHERN GREAT
BASIN AND PACIFIC NORTHWEST FRIDAY. AN APPROACHING PACIFIC SYSTEM
WILL BRING HIGHER PRECIPITATION CHANCES SPREADING SOUTHWARD INTO
CALIFORNIA LATER FRIDAY AND INTO THE DAY SATURDAY. SOME MODERATE
TO LOCALLY HEAVY SHOWERS WILL BE POSSIBLE ALONG THE COAST, WITH
ACCUMULATING SNOWFALL EXPECTED FOR THE NORTHERN COASTAL RANGES,
KLAMATH MOUNTAINS, AND SIERRA NEVADA. A WINTER WEATHER ADVISORY
HAS BEEN ISSUED FOR SOUTHERN PORTIONS OF THE SIERRA WHERE 6-12
INCHES OF SNOW IS FORECAST. GUSTY WINDS ARE EXPECTED HERE AS WELL,
ESPECIALLY ALONG THE AREA MOUNTAIN RANGES.
COOLER, BELOW AVERAGE TEMPERATURES WILL SPREAD EASTWARD FROM THE
LOWER GREAT LAKES/OHIO VALLEY/TENNESSEE VALLEY FRIDAY INTO THE
NORTHEAST/MID-ATLANTIC SATURDAY FOLLOWING RECENT COLD FRONT
PASSAGE. HIGHS WILL TEND TO BE AT OR JUST BELOW AVERAGE FURTHER
SOUTH INTO THE SOUTHEAST AND FLORIDA. A BROAD AREA OF MUCH ABOVE
AVERAGE TEMPERATURES ACROSS THE WEST/PLAINS FRIDAY WILL EXPAND
INTO THE MISSISSIPPI VALLEY SATURDAY AS UPPER-LEVEL RIDGING SHIFTS
EASTWARD OVER THE CENTRAL U.S. THE GREATEST ANOMALIES WILL RESIDE
OVER THE NORTHERN AND CENTRAL PLAINS SATURDAY, WHERE HIGHS INTO
THE 80S ARE UPWARDS OF 20-25 DEGREES ABOVE NORMAL. MUCH COOLER
TEMPERATURES WILL ARRIVE IN CALIFORNIA SATURDAY AS THE PACIFIC
SYSTEM BEGINS TO MOVE INLAND.
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