445
FXUS01 KWBC 191934
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
334 PM EDT THU OCT 19 2023
VALID 00Z FRI OCT 20 2023 - 00Z SUN OCT 22 2023
..RAIN FROM THE GREAT LAKES TO THE NORTHEAST
...TEMPERATURES WILL BE 15 TO 25 DEGREES ABOVE AVERAGE OVER THE
WESTERN HALF OF THE COUNTRY...
ON THURSDAY EVENING, A FRONT EXTENDING FROM THE GREAT LAKES TO THE
WESTERN/CENTRAL GULF COAST WILL ADVANCE OFF THE EASTERN SEABOARD
BY SATURDAY. THE SYSTEM WILL PRODUCE RAIN OVER PARTS OF THE GREAT
LAKES/OHIO VALLEY BY THURSDAY EVENING, WHICH WILL DEVELOP
SOUTHWARD OVER THE TENNESSEE VALLEY INTO THE CENTRAL GULF COAST
OVERNIGHT THURSDAY.
IN ADDITION, ON THURSDAY EVENING, MOISTURE FROM THE ATLANTIC WILL
STREAM INTO THE MID-ATLANTIC, CREATING RAIN OVER THE REGION
OVERNIGHT THURSDAY INTO FRIDAY. AS THE FRONT MOVES EASTWARD ON
FRIDAY, RAIN MOVES INTO PARTS OF THE NORTHEAST AND EXTENDS
SOUTHWARD INTO THE SOUTHEAST BY FRIDAY EVENING. OVERNIGHT FRIDAY,
THE RAIN WILL BECOME MORE SCATTERED FROM THE LOWER GREAT
LAKES/OHIO VALLEY TO THE MID-ATLANTIC INTO SATURDAY.
FURTHERMORE, ON FRIDAY, A SECOND FRONT OVER THE NORTHERN HIGH
PLAINS WILL MOVE SOUTHEASTWARD TO THE SOUTHERN
MID-ATLANTIC/SOUTHERN APPALACHIANS TO THE SOUTHERN PLAINS BY
SATURDAY EVENING. THE SYSTEM WILL KEEP LIGHT RAIN OVER PARTS OF
THE UPPER MIDWEST FRIDAY EVENING INTO SATURDAY.
MEANWHILE, UPPER-LEVEL RIDGING OVER THE SOUTHWEST CREEPS EASTWARD
INTO THE PLAINS BY SATURDAY. THE UPPER-LEVEL RIDGING WILL ALLOW
TEMPERATURES TO BE 15 TO 25 DEGREES ABOVE AVERAGE OVER THE
NORTHERN INTERMOUNTAIN REGION/SOUTHWEST INTO THE PLAINS.
ADDITIONALLY, WEAK ONSHORE FLOW OVER THE NORTHWEST WILL AID IN
CREATING VERY SCATTERED RAIN OVER PARTS OF THE REGION FROM
THURSDAY AFTERNOON INTO FRIDAY.
ZIEGENFELDER
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