025
FXUS01 KWBC 220452
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1252 AM EDT SAT JUL 22 2023
VALID 12Z SAT JUL 22 2023 - 12Z MON JUL 24 2023
...EXCESSIVE HEAT WARNINGS AND ADVISORIES FROM PARTS OF
CALIFORNIA, THE NORTHERN INTERMOUNTAIN REGION, SOUTHWEST, AND THE
GREAT BASIN; A SECOND AREA FROM THE SOUTHEAST TO TEXAS...
..MONSOONAL RAIN TO IMPACT THE FOUR CORNERS REGION
A DANGEROUS, LONG-LIVED, AND RECORD-BREAKING HEAT WAVE WILL
CONTINUE OVER THE SOUTHWEST THIS WEEKEND, PARTICULARLY IN THE LOW
DESERT AREAS, WITH TRIPLE DIGIT HIGH TEMPERATURES ALSO EXTENDING
NORTHWARD INTO THE CENTRAL GREAT BASIN. TEMPERATURES NEXT WEEK ARE
FORECAST TO REMAIN HOT, BUT RETURN CLOSER TO AVERAGE. OPPRESSIVE
HEAT AND HUMIDITY ARE EXPECTED TO CREATE WIDESPREAD 105-115 DEGREE
HEAT INDICES ACROSS THE MID-SOUTH, SOUTHEAST, AND GULF COAST
THROUGH EARLY THIS WEEKEND. RELIEF ARRIVES BY SUNDAY FOR MOST
AREAS AS A COLD FRONT APPROACHES THE NORTHERN GULF COAST. TAKE THE
HEAT SERIOUSLY AND AVOID EXTENDED TIME OUTDOORS. TEMPERATURES AND
HEAT INDICES WILL REACH LEVELS THAT WOULD POSE A HEALTH RISK TO
ANYONE WITHOUT EFFECTIVE COOLING AND/OR ADEQUATE HYDRATION.
NIGHTTIME TEMPERATURES WILL PROVIDE VERY LITTLE RELIEF. HEAT IS
THE LEADING WEATHER-RELATED KILLER IN THE U.S. EXCESSIVE HEAT
WARNINGS AND HEAT ADVISORIES ARE CURRENTLY IN EFFECT ACROSS THE
SOUTHERN TIER OF THE U.S..
THIS WEEKEND, MONSOONAL MOISTURE WILL BRING HEAVY RAIN CONCERNS TO
ARIZONA AND NEW MEXICO WHERE A MARGINAL RISK OF EXCESSIVE RAINFALL
LEADING TO FLASH FLOODING IS IN EFFECT. A QUASI-STATIONARY FRONT
WILL BE THE FOCUS FOR THUNDERSTORMS AND POTENTIALLY HEAVY RAINFALL
THIS WEEKEND. SOME AREAS ALONG THE CENTRAL GULF COAST MAY
ACCUMULATE 1-2 INCHES OF RAIN PER HOUR. THIS SHOULD ONLY BE ENOUGH
TO CAUSE ISOLATED INSTANCES OF FLASH FLOODING. ELSEWHERE, THE LOW
PRESSURE SYSTEM IN THE NORTHEAST WILL GENERATE SOME STORMS IN THE
INTERIOR NORTHEAST AND NEW ENGLAND TODAY BEFORE THE SYSTEM AND
STORMS MOVE OFF INTO THE CANADIAN MARITIME ON SUNDAY. A COLD FRONT
SWEEPING DOWN THROUGH THE UPPER MIDWEST WILL BRING SHOWERS AND
THUNDERSTORMS TO THE GREATER MIDWEST THIS WEEKEND.
KEBEDE
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