342
FXUS01 KWBC 071702
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
101 PM EDT SAT SEP 07 2024
VALID 00Z SUN SEP 08 2024 - 00Z TUE SEP 10 2024
...DANGEROUS HEAT CONTINUES TO IMPACT PORTIONS OF THE WEST THIS
WEEKEND...
...HEAVY RAIN AND SCATTERED INSTANCES OF FLASH FLOODING ARE
POSSIBLE ALONG THE GULF COAST AND PARTS OF THE SOUTHEAST...
...BELOW AVERAGE TEMPERATURES TO SETTLE IN ACROSS MUCH OF THE
MIDWEST AND EAST THROUGH THE BEGINNING OF NEXT WEEK...
A FEW MORE DAYS OF RECORD-BREAKING AND DANGEROUS HEAT ARE IN STORE
FOR PARTS OF THE WEST AS ABOVE AVERAGE TEMPERATURES LINGER
UNDERNEATH A WEAKENING UPPER-LEVEL HIGH PRESSURE. AREAS MOST
LIKELY TO EXPERIENCE MAJOR TO EXTREME HEATRISK (LEVELS OF HEAT
THAT AFFECT ANYONE WITHOUT EFFECTIVE COOLING OR ADEQUATE
HYDRATION) THROUGH SUNDAY INCLUDE SOUTHERN CALIFORNIA, THE DESERT
SOUTHWEST, AND THE NORTHERN GREAT BASIN. THESE REGIONS ARE ALSO
WHERE EXCESSIVE HEAT WARNINGS AND HEAT ADVISORIES REMAIN IN
EFFECT. HIGH TEMPERATURES IN THE SOUTHWEST ARE EXPECTED TO SOAR
INTO THE UPPER 90S AND TRIPLE DIGITS, WITH 110S IN THE TYPICALLY
HOTTEST DESERT LOCATIONS THROUGH AT LEAST MONDAY. HIGHS INTO THE
UPPER 90S ARE FORECAST TO SIMMER THE NORTHERN GREAT BASIN BEFORE A
GRADUAL COOLING TREND COMMENCES BY EARLY NEXT WEEK, WITH THE
ANOMALOUSLY WARM TEMPERATURES FORECAST TO SHIFT EASTWARD INTO THE
NORTHERN PLAINS. RESIDENTS AND VISITORS ARE ADVISED TO CONTINUE
FOLLOWING PROPER HEAT SAFETY. THIS INCLUDES STAYING HYDRATED AND
TAKING FREQUENT BREAKS FROM THE HEAT DURING THE HOTTEST PARTS OF
THE DAY. IN ADDITION TO HEAT, WILDFIRE SMOKE CAUSING POOR AIR
QUALITY WILL ALSO BE A CONCERN FOR PARTS OF THE GREAT BASIN.
A STATIONARY FRONT DRAPED ACROSS THE SOUTHEAST AND NORTHERN GULF
OF MEXICO WILL CONTINUE TO PROVIDE A FOCUS FOR NUMEROUS SHOWERS
AND THUNDERSTORMS OVER THE NEXT FEW DAYS. THE MOISTURE GRADIENT
ALONG THE FRONT WILL BE REINFORCED BY A SEPARATE APPROACHING COLD
FRONT SINKING SOUTHWARD TOWARDS THE GULF COAST TONIGHT, AND
MOISTURE WILL LINGER AROUND THE BOUNDARY THROUGH THE NEXT FEW
DAYS. AREAS OF LOCALLY HEAVY RAIN AND SCATTERED FLASH FLOODING
WILL BE POSSIBLE FOR PORTIONS OF THE SOUTHEAST AND GULF COAST,
INCLUDING NORTHERN AND CENTRAL FLORIDA. TROPICAL MOISTURE IS
FORECAST TO SPREAD NORTH INTO TEXAS BY MONDAY AS AN AREA OF LOW
PRESSURE DEVELOPS IN THE SOUTHWESTERN GULF OF MEXICO, AND THE
THREAT FOR HEAVY RAIN AND SCATTERED FLASH FLOODING WILL FOCUS
ALONG PORTIONS OF THE TEXAS GULF COAST.
ELSEWHERE, A COLD FRONT SWEEPING ACROSS THE EAST COAST WILL
PRODUCE SCATTERED SHOWERS AND THUNDERSTORMS THROUGH TONIGHT. A
FALL-LIKE AIR MASS WITH BELOW NORMAL, CRISP TEMPERATURES WILL
FILTER INTO THE EAST BEHIND THE FRONT UNDERNEATH POTENT HIGH
PRESSURE. WIDESPREAD LOWS INTO THE 40S WILL LEAD TO A FEW CHILLY
MORNINGS, WITH SEVERAL DAILY RECORD LOWS POSSIBLE BETWEEN MISSOURI
AND NEW JERSEY ON SUNDAY. PATCHY FROST CANNOT BE RULED OUT FOR
SOME LOCATIONS WHERE TEMPERATURES MAY DIP INTO THE UPPER 30S.
CONVERSELY, SOUTH FLORIDA WILL REMAIN HOT AND HUMID THIS WEEKEND
AS HIGH TEMPERATURES RISE INTO THE LOW-TO-MID 90S, WHILE HEAT
INDICES APPROACH 110 DEGREES.
SNELL/DOLAN
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