727
FXUS01 KWBC 201935
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
334 PM EDT FRI OCT 20 2023
VALID 00Z SAT OCT 21 2023 - 00Z MON OCT 23 2023
...RAIN FROM THE GREAT LAKES TO THE NORTHEAST AND OVER THE
NORTHWEST...
...TEMPERATURES WILL BE 15 TO 25 DEGREES ABOVE AVERAGE OVER THE
PARTS OF THE NORTHERN INTERMOUNTAIN REGION/SOUTHWEST INTO THE
PLAINS AND MIDDLE/LOWER MISSISSIPPI VALLEY...
A FRONT EXTENDING FROM THE LOWER GREAT LAKES TO THE MID-ATLANTIC
AND THEN SOUTHWESTWARD TO THE GULF COAST ON FRIDAY WILL ADVANCE
OFF THE EASTERN SEABOARD BY SATURDAY. THE SYSTEM WILL PRODUCE RAIN
OVER PARTS OF THE GREAT LAKES/OHIO VALLEY INTO THE NORTHEAST AND
SOUTHWARD TO THE CAROLINAS. THE RAIN WILL CONTINUE OVER THE
NORTHEAST INTO PARTS OF THE CENTRAL APPALACHIANS ON SATURDAY.
FURTHERMORE, ON FRIDAY, A SECOND FRONT OVER THE UPPER MISSISSIPPI
VALLEY/NORTHERN PLAINS WILL MOVE SOUTHEASTWARD OFF THE SOUTHEAST
COAST BY SUNDAY. THE SYSTEM WILL KEEP LIGHT RAIN OVER PARTS OF THE
UPPER MISSISSIPPI VALLEY/UPPER GREAT LAKES FRIDAY EVENING INTO
SATURDAY. AS THE FRONT MOVES SOUTHEASTWARD, RAIN MOVES INTO THE
LOWER GREAT LAKES/OHIO VALLEY OVERNIGHT SATURDAY. IN ADDITION, THE
RAIN SHOWERS CONTINUE OVER PARTS OF THE NORTHEAST. ON SUNDAY, THE
RAIN SHOWERS CONTINUE OVER THE NORTHEAST, WITH WET SNOW AT THE
HIGHER ELEVATIONS OF NEW YORK STATE.
MEANWHILE, UPPER-LEVEL TROUGHING AND A WEAK BOUNDARY OVER THE WEST
WILL AID IN CREATING LIGHT RAIN OVER PARTS OF THE PACIFIC
NORTHWEST AND NORTHERN/CENTRAL CALIFORNIA OVERNIGHT SATURDAY INTO
SUNDAY.
FURTHER, UPPER-LEVEL RIDGING EXTENDING FROM THE RIO GRANDE VALLEY
TO THE NORTHERN INTERMOUNTAIN REGION WILL SLOWLY CREEP EASTWARD
INTO THE MIDDLE/LOWER MISSISSIPPI VALLEY BY SUNDAY. THE
UPPER-LEVEL RIDGING WILL ALLOW TEMPERATURES TO BE 15 TO 25 DEGREES
ABOVE AVERAGE OVER THE NORTHERN INTERMOUNTAIN REGION/SOUTHWEST
INTO THE PLAINS AND MIDDLE/LOWER MISSISSIPPI VALLEY.
ZIEGENFELDER
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