009
FXUS01 KWBC 051949
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
349 PM EDT TUE SEP 05 2023
VALID 00Z WED SEP 06 2023 - 00Z FRI SEP 08 2023
...SEVERE THUNDERSTORMS EXPECTED TONIGHT OVER PARTS OF THE UPPER
MIDWEST, THE OZARKS AND PARTS OF NORTHEASTERN OKLAHOMA...
...RECORD BREAKING HEAT WAVE INTENSIFIES ACROSS THE NORTHEAST AND
MID-ATLANTIC...
...CANADIAN WILDFIRE SMOKE IMPACTS PARTS OF THE NORTHERN/CENTRAL
PLAINS...
A SHORTWAVE TROUGH WILL INITIATE THUNDERSTORM ACTIVITY ACROSS
PARTS OF THE MISSISSIPPI VALLEY TONIGHT. THE STORM PREDICTION
CENTER ISSUED TWO SEPARATE SLIGHT RISK OF SEVERE THUNDERSTORM
AREAS FOR THE PERIOD ENDING TOMORROW MORNING. THE FIRST AREA IS
OVER EASTERN MINNESOTA, NORTHWESTERN WISCONSIN AND WESTERN U.P. OF
MICHIGAN. THE SECOND SLIGHT RISK AREA EXTENDS FROM NORTHEASTERN
OKLAHOMA THROUGH THE OZARKS AND INTO CENTRAL MISSOURI. SEVERE WIND
GUSTS AND ISOLATED LARGE HAIL WILL BE THE PRIMARY SEVERE WEATHER
THREATS THROUGH TONIGHT.
THE EASTERN U.S. RIDGE AND AMPLIFYING MIDWEST TROUGH WILL SUPPORT
THE ONGOING HEAT WAVE ACROSS THE NORTHEAST AND MID-ATLANTIC
THROUGH THURSDAY. HIGH TEMPERATURES IN THE 90S AND 100S WILL
REPRESENT 15-25 DEGREE DEPARTURES FROM NORMAL, WHILE LOW
TEMPERATURES IN THE 60S AND 70S WILL ALSO BE 15-25 DEGREES ABOVE
NORMAL. ANOMALOUSLY HIGH TEMPERATURES WILL TIE OR BREAK NUMEROUS
RECORDS ACROSS THE MID-ATLANTIC AND NORTHEAST DURING THIS PERIOD.
THE LACK OF OVERNIGHT RELIEF FROM THE DAYTIME HEAT WILL POSE A
PARTICULAR RISK FOR THOSE WITHOUT ADEQUATE COOLING AND/OR
HYDRATION. HEAT ADVISORIES ARE IN EFFECT FROM THE INTERIOR
NORTHEAST DOWN INTO NORTHERN VIRGINIA. CONDITIONS SHOULD IMPROVE
ON FRIDAY WITH THE PASSAGE OF A STRONG COLD FRONT. HEAT ADVISORIES
ARE ALSO IN EFFECT FOR PARTS OF THE SOUTHERN PLAINS AND LOWER
MISSISSIPPI VALLEY WHERE ANOMALOUS HEAT IS EXPECTED TO INTENSIFY
THROUGH THE REST OF THE WORK WEEK.
RELATIVELY ZONAL FLOW ALOFT COMBINED WITH EASTERLY WINDS AT THE
LOW LEVELS WILL ALLOW FOR THE ADVECTION OF CANADIAN WILDFIRE SMOKE
ACROSS THE NORTHERN PLAINS AND DOWN INTO NEBRASKA. AIR QUALITY
ALERTS ARE IN EFFECT FOR THE HIGH PLAINS OF MONTANA AND WYOMING,
MOST OF NEBRASKA AND NORTHWESTERN MINNESOTA.
KEBEDE
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