025
FXUS01 KWBC 082036
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
436 PM EDT THU JUN 08 2023
VALID 00Z FRI JUN 09 2023 - 00Z SUN JUN 11 2023
...THERE IS A MODERATE RISK OF EXCESSIVE RAINFALL LEADING TO FLASH
FLOODING OVER PARTS OF THE NORTHERN ROCKIES/PLAINS TONIGHT...
...AIR QUALITY ALERTS OVER PARTS OF THE GREAT LAKES/OHIO VALLEY TO
THE NORTHEAST AND MID-ATLANTIC...
...TEMPERATURES WILL BE BELOW AVERAGE OVER PARTS OF
CALIFORNIA/SOUTHWEST AND THE NORTHEAST/MID-ATLANTIC...
SHORTWAVE ENERGY MOVING THROUGH THE INTERMOUNTAIN WEST WILL
GENERATE THUNDERSTORMS ACROSS THE NORTHERN ROCKIES/PLAINS TONIGHT.
THERE'S A MODERATE RISK OF EXCESSIVE RAINFALL LEADING TO FLASH
FLOODING AS WELL AS FLASH FLOOD WATCHES, DUE TO THE DEVELOPMENT OF
MCS CAPABLE OF PRODUCING 2"/HR RAINFALL RATES AND VERY SENSITIVE
SOILS ACROSS PORTIONS OF IDAHO AND MONTANA. SHORTWAVES EMBEDDED
WITHIN THE CENTRAL NORTH AMERICAN RIDGE WILL CONTINUE TO PRODUCE
THUNDERSTORMS AND EXCESSIVE RAINFALL FROM THE NORTHERN GREAT
BASIN/ROCKIES DOWN THROUGH THE GREAT PLAINS THROUGH THIS WEEKEND.
THERE ARE SLIGHT RISKS OF SEVERE THUNDERSTORMS IN EFFECT FOR PARTS
OF COASTAL TEXAS TONIGHT, WHERE LARGE HAIL AND ISOLATED DAMAGING
WINDS WILL BE THE MAIN THREAT, THEN EASTERN COLORADO AND WESTERN
KANSAS ON FRIDAY, WHERE SEVERE OUTFLOW GUSTS ARE POSSIBLE.
ANOMALOUS RIDGING OVER CENTRAL NORTH AMERICA HAS BEEN GENERATING
VERY WARM TEMPERATURES AND DRY CONDITIONS OVER MUCH OF CANADA OVER
THE PAST SEVERAL DAYS. THIS HAS LEAD TO THE DEVELOPMENT OF MANY
MAJOR WILDFIRES ACROSS THE COUNTRY. AN AREA OF UPPER LOW PRESSURE
HAS AND WILL CONTINUE TO DIRECT THE SMOKE FROM THE WILDFIRES IN
QUEBEC, ONTARIO AND NOVA SCOTIA DOWN INTO PARTS OF THE MIDWEST,
NORTHEAST AND MID-ATLANTIC THROUGH THE WEEKEND. WILDFIRE SMOKE AT
THE LEVELS FORECAST IS DANGEROUS, ESPECIALLY TO THOSE WITH
RESPIRATORY SENSITIVITIES AND ELDERLY/YOUNG PEOPLE SO LIMITING
OUTDOOR EXPOSURE TIME IS IMPORTANT WHILE THE CURRENT AIR QUALITY
ALERTS ARE IN EFFECT. SOME REPRIEVE IS LIKELY BY EARLY NEXT WEEK
WHEN A COLD FRONT MAY SWEEP THROUGH THE EASTERN HALF OF THE
COUNTRY.
HIGH TEMPERATURES WILL BE BELOW AVERAGE ACROSS CALIFORNIA AND THE
NORTHEAST/MID-ATLANTIC THROUGH SATURDAY DUE TO THE DIPOLES OF
UPPER LOWS SPINNING OVER THE RESPECTIVE REGIONS DURING THAT TIME.
HIGHS IN THE 60S AND LOW 70S WILL BE 10-20 DEGREES BELOW AVERAGE
FOR MANY PLACES, BUT WON'T BE COOL ENOUGH TO RIVAL MUCH IF ANY
RECORDS. ABOVE AVERAGE TEMPERATURES PERSIST ACROSS THE GREAT
PLAINS, DUE TO THE PRESENCE OF THE UPPER RIDGE THROUGH SATURDAY.
KEBEDE
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