336
FXUS01 KWBC 172001
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 PM EDT THU AUG 17 2023
VALID 00Z FRI AUG 18 2023 - 00Z SUN AUG 20 2023
...ANOMALOUS HEAT SHIFTS FROM NORTHWEST INTO NORTHERN/CENTRAL
PLAINS; WIDESPREAD RECORD BREAKING HEAT WAVE PERSISTS ACROSS THE
SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY THROUGH THE WEEKEND...
...SHOWERS, THUNDERSTORMS, AND AN INCREASING RISK OF FLASH
FLOODING FOR THE SOUTHWEST...
...SCATTERED SHOWERS AND THUNDERSTORMS FROM OHIO VALLEY INTO
NORTHEAST THROUGH SATURDAY...
AN AMPLIFIED UPPER TROUGH WILL CUT OFF AS IT SPINS THROUGH THE
NORTHEAST AND PARTS OF SOUTHEASTERN CANADA OVER THE NEXT COUPLE OF
DAYS. SCATTERED SHOWERS AND THUNDERSTORMS WILL FOCUS ALONG A
SURFACE COLD FRONT SWEEPING ACROSS THE OHIO VALLEY, NORTHERN
MID-ATLANTIC AND NORTHEAST. RAINFALL RATES SHOULDN'T BE HIGH
ENOUGH TO CAUSE FLASH FLOODING CONCERNS, HOWEVER MARGINAL RISKS
ARE IN EFFECT FOR MUCH OF THE NORTHEAST THROUGH FRIDAY NIGHT.
AN UPPER TROUGH WILL SWING ACROSS SOUTHWESTERN CANADA WHILE AN
UPPER RIDGE EXPANDS OVER THE GREAT PLAINS AND MISSISSPPI VALLEY
OVER THE NEXT COUPLE OF DAYS. LOWS IN THE MID-UPPER 60S AND LOW
70S MAY TIE OR BREAK RECORDS ACROSS THE NORTHWEST TONIGHT.
WIDESPREAD RECORD HIGH TEMPERATURES ARE EXPECTED TO PERSIST ACROSS
THE SOUTHERN PLAINS AND LOWER MISSISSIPPI VALLEY THROUGH THIS
WEEKEND.
KEBEDE
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