505
FXUS01 KWBC 012001
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 PM EDT TUE OCT 01 2024
VALID 00Z WED OCT 02 2024 - 00Z FRI OCT 04 2024
..RECORD BREAKING HEAT CONTINUES OVER THE SOUTHWEST U.S.
...CRITICAL FIRE WEATHER RISK OVER THE NORTHERN/CENTRAL HIGH
PLAINS TODAY AND TOMORROW...
...GENERALLY DRY CONDITIONS ACROSS MUCH OF THE LOWER 48 THROUGH
MIDWEEK...
APPROXIMATELY 35 MILLION PEOPLE IN THE SOUTHWEST U.S. FALL WITHIN
A HEAT ALERT TODAY AS A LATE-SEASON HEAT WAVE KEEPS A FIRM GRIP
OVER THE REGION. CONTINUING THE TREND FROM THE LAST SEVERAL DAYS,
NUMEROUS RECORD BREAKING HIGH TEMPERATURES IN THE TRIPLE DIGITS
ARE EXPECTED THROUGH AT LEAST THIS FRIDAY, WHICH WILL SUPPORT
WIDESPREAD MODERATE TO MAJOR HEAT IMPACTS ACROSS THE SAN
FRANCISCO, LAS VEGAS, AND LOS ANGELES METROPOLITAN AREAS PER THE
MOST RECENT EXPERIMENTAL HEATRISK RUNS. LOCALLY EXTREME HEAT
IMPACTS ARE ALSO EXPECTED ATOP THE PHOENIX METROPOLITAN AREA
TODAY. AS A REMINDER, THE MAJOR TO EXTREME HEATRISK CATEGORIES
MEAN THAT HEALTH IMPACTS FROM HEAT BECOME MORE LIKELY IN GENERAL,
AND MAY OCCUR IN ANYONE WITHOUT ADEQUATE HYDRATION OR COOLING.
OUTSIDE OF THE SOUTHWEST, WELL-ABOVE AVERAGE TEMPERATURES ARE
EXPECTED THROUGH MIDWEEK ACROSS MUCH OF INTERMOUNTAIN WEST AND
PLAINS STATES WITHIN THE WARM SECTOR OF A DEVELOPING SURFACE LOW
IN THE CANADIAN PRAIRIES. WHILE TEMPERATURES WILL NOT REACH THE
HAZARDOUS LEVELS OF THE SOUTHWEST, THE WARMTH COMBINED WITH
STRENGTHENING SURFACE WINDS AND DRY CONDITIONS WILL SUPPORT
CRITICAL FIRE WEATHER CONDITIONS OVER THE NORTHERN/CENTRAL HIGH
PLAINS TODAY AND TOMORROW, RESPECTIVELY. WIDESPREAD RED FLAG
WARNINGS ARE IN EFFECT ACROSS MUCH OF THE AFOREMENTIONED AREA AS
OF THIS AFTERNOON.
PRECIPITATION-WISE, LINGERING MODERATE TO LOCALLY HEAVY RAINFALL
OVER THE MID-ATLANTIC AND CENTRAL FLORIDA SHOULD CLEAR OUT TONIGHT
AS APPROACHING HIGH-PRESSURE KICKS A PESKY OFFSHORE LOW TO THE
EAST. A SECOND BATCH OF SHOWERS MAY ARRIVE TO THE EASTERN U.S.
ASSOCIATED WITH A COLD FRONT TOMORROW, BUT RAINFALL AMOUNTS SHOULD
BE MODEST AT BEST. OTHERWISE, A WEAK FRONT IN THE GULF OF MEXICO
COULD SUPPORT LOCALLY HEAVY RAINFALL ALONG THE GULF COAST LATER
TOMORROW, ALTHOUGH MUCH OF THE HEAVIEST RAINFALL IS FORECAST TO
REMAIN OFFSHORE.
ASHERMAN
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