564
FXUS01 KWBC 270743
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
342 AM EDT SUN AUG 27 2023
VALID 12Z SUN AUG 27 2023 - 12Z TUE AUG 29 2023
..DANGEROUS HEAT GRIPS PARTS OF THE SOUTH
...EXCESSIVE RAINFALL LEADING TO FLASH FLOODING IS POSSIBLE FROM
THE TENNESSEE VALLEY TO THE SOUTHEAST...
SLOW MOVING SHORTWAVE ENERGY WILL SUPPORT SCATTERED SHOWERS AND
THUNDERSTORMS ACROSS THE MID-ATLANTIC, SOUTHEAST AND GULF COAST
TODAY. HEAVY RAIN MAY DEVELOP OVER THE CAROLINAS, WHERE FAVORABLE
DYNAMICS MOISTURE AND INSTABILITY WILL BE PRESENT. THEREFORE, A
SLIGHT RISK OF EXCESSIVE RAINFALL LEADING TO FLASH FLOODING IS IN
EFFECT OVER PORTIONS OF WESTERN TENNESSEE AND THE CAROLINAS.
WIDESPREAD AREAS OF 1-2 INCHES ARE LIKELY WITH LOCALLY HIGHER
AMOUNTS POSSIBLE TODAY. THE FOCUS FOR EXCESSIVE RAINFALL SHIFTS TO
A STATIONARY FRONT DRAPED ACROSS THE SOUTHEAST AND GULF COAST ON
MONDAY. THE AXIS OF HEAVIEST RAINFALL WILL OCCUR FROM THE GREAT
SMOKEY MOUNTAINS OF NORTH CAROLINA DOWN THROUGH NORTHERN GEORGIA
AND TO THE CENTRAL GULF COAST. ANOTHER SLIGHT RISK OF EXCESSIVE
RAINFALL IS IN EFFECT FROM THE WESTERN CAROLINAS DOWN INTO
NORTHERN GEORGIA AND NORTHWESTERN ALABAMA.
A DANGEROUS HEAT WAVE WILL PERSIST ACROSS PORTIONS OF THE SOUTHERN
U.S. THROUGH MONDAY. RECORD HIGH TEMPERATURES COMBINED WITH
UNUSUALLY HIGH HUMIDITY WILL LEAD TO HEAT INDICES NEAR RECORD
LEVELS OVER THE MID-MISSISSIPPI VALLEY AND GULF COAST REGION. THE
EXTREME HEAT AND LACK OF OVERNIGHT RELIEF WILL CONTINUE FOR THE
GULF COAST UNTIL A COLD FRONT USHERS IN MORE SEASONAL TEMPERATURES
BEGINNING MONDAY. PORTIONS OF THE NORTHWEST AND DESERT SOUTHWEST
WILL EXPERIENCE ABNORMALLY WARM TEMPERATURES OVER THE NEXT COUPLE
OF DAYS AS WELL AS THE UPPER RIDGE FOCUSES OVER THE WEST.
EXCESSIVE HEAT WARNINGS AND HEAT ADVISORIES ARE IN EFFECT FOR THE
GULF COAST AND DESERT SOUTHWEST. HEAT OF THIS INTENSITY POSES A
HEALTH RISK TO ANYONE WITHOUT EFFECTIVE COOLING AND/OR ADEQUATE
HYDRATION. DO NOT UNDERESTIMATE THE POTENTIAL FOR HEAT-RELATED
ILLNESS. HAVE A WAY TO BREAK YOUR HEAT EXPOSURE, COOL DOWN, AND
STAY HYDRATED.
KEBEDE
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