537
FXUS01 KWBC 061959
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
358 PM EDT THU AUG 06 2026
VALID 00Z FRI AUG 07 2026 - 00Z SUN AUG 09 2026
...DANGEROUS HEAT EXPANDS ACROSS THE SOUTHWEST, INTERMOUNTAIN
WEST, ROCKIES, AND THE CENTRAL/SOUTHERN PLAINS INTO THE WEEKEND...
...UNSETTLED WEATHER PERSISTS FOR PORTIONS OF THE SOUTHWEST AND
ACROSS PARTS OF THE EASTERN HALF OF THE U.S. THE NEXT FEW DAYS...
...POOR AIR QUALITY FROM WILDFIRE SMOKE CONTINUES FOR PARTS OF THE
PACIFIC NORTHWEST, GREAT BASIN, INTERMOUNTAIN WEST, AND THE
ROCKIES...
A SPRAWLING DOME OF MID/UPPER LEVEL HIGH PRESSURE WILL AMPLIFY
ACROSS THE GREAT BASIN AND FOUR CORNERS THROUGH SATURDAY, BRINGING
INCREASINGLY HOTTER WEATHER TO THE SOUTHWEST, INTERMOUNTAIN WEST,
ROCKIES, AND THE CENTRAL/SOUTHERN PLAINS INTO THE WEEKEND. HIGH
TEMPERATURES ARE EXPECTED TO SURGE WELL INTO THE 90S AND 100S,
LEADING TO WIDESPREAD MAJOR TO LOCALLY EXTREME HEATRISK ACROSS THE
REGION. NUMEROUS DAILY TEMPERATURE RECORDS ARE LIKELY BEGINNING ON
FRIDAY AND CONTINUING EACH DAY THROUGH SUNDAY.
MEANWHILE, A WAVY AND NEARLY STATIONARY FRONTAL BOUNDARY
STRETCHING FROM THE CENTRAL/SOUTHERN PLAINS TO THE NORTHEAST WILL
FOCUS SCATTERED SHOWERS AND THUNDERSTORMS ACROSS PARTS OF THE
EASTERN HALF OF THE U.S. OVER THE NEXT FEW DAYS. ALONG AND SOUTH
OF THIS BOUNDARY, THUNDERSTORMS DEVELOPING WITHIN AN ENVIRONMENT
THAT FEATURES PLENTY OF MOISTURE AND INSTABILITY WILL SUPPORT THE
POTENTIAL FOR HIGH RAINFALL RATES. IF STORMS ARE SLOW-MOVING OR
REPEATEDLY TRAIN OVER THE SAME AREAS, ISOLATED TO SCATTERED FLASH
FLOODING WILL BE POSSIBLE, ESPECIALLY FOR LOW-LYING, POOR
DRAINAGE, AND URBAN AREAS. SOME STORMS MAY BECOME STRONG TO
MARGINALLY SEVERE ACROSS PARTS OF THE CENTRAL/SOUTHERN PLAINS AND
FROM THE CAROLINAS TO THE NORTHEAST THROUGH THIS EVENING, WITH
DAMAGING WINDS AND HAIL THE PRIMARY CONCERNS. ANOTHER COLD FRONT
PUSHING INTO THE PLAINS, UPPER MIDWEST, OHIO VALLEY, AND GREAT
LAKES FRIDAY INTO SATURDAY COULD ALSO SPARK A FEW MORE STRONG TO
MARGINALLY SEVERE THUNDERSTORMS. ADDITIONALLY, MONSOONAL MOISTURE
WILL LIKELY PRODUCE DAILY SHOWERS AND THUNDERSTORMS WITH THE
THREAT OF LOCALLY HEAVY RAIN AND ISOLATED FLASH FLOODING OVER
PARTS OF THE SOUTHWEST DURING THE AFTERNOON AND EVENING HOURS
THROUGH THE END OF THE WEEK AND INTO THE WEEKEND.
ONGOING WILDFIRES ACROSS THE WESTERN U.S. WILL CONTINUE TO PRODUCE
LARGE PLUMES OF DENSE AND PERSISTENT SMOKE, RESULTING IN POOR AIR
QUALITY ACROSS PORTIONS OF THE PACIFIC NORTHWEST, INTERMOUNTAIN
WEST, AND ROCKIES THE NEXT SEVERAL DAYS. AIR QUALITY ALERTS REMAIN
IN EFFECT, HIGHLIGHTING THE POTENTIAL FOR ADVERSE HEALTH EFFECTS
FOR GROUPS THAT ARE SENSITIVE TO POOR AIR QUALITY.
MILLER
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