398
FXUS01 KWBC 232004
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 PM EDT FRI JUN 23 2023
VALID 00Z SAT JUN 24 2023 - 00Z MON JUN 26 2023
...A MODERATE RISK OF EXCESSIVE RAINFALL IS ANTICIPATED ACROSS
PORTIONS OF MONTANA THROUGH TONIGHT AS LOCALLY HEAVY RAIN SPREADS
EAST ACROSS THE NORTHERN PLAINS AND UPPER MIDWEST THROUGH THE
WEEKEND...
...RISK OF SEVERE THUNDERSTORMS WILL SHIFT EAST FROM THE HIGH
PLAINS TONIGHT TO THE MIDWEST ON SATURDAY, FOLLOWED BY THE
OHIO/TENNESSEE VALLEY ON SUNDAY...
...EXCESSIVE HEAT WARNINGS AND HEAT ADVISORIES REMAIN IN EFFECT
FOR THE FAR SOUTHERN PLAINS THROUGH THE WEEKEND WITH AN EXCESSIVE
HEAT WATCH NOW IN EFFECT FOR SOUTHERN ARIZONA...
AFTER A BRIEF SOUTHWARD RETREAT OF THE EXCESSIVE HEAT TOWARD
SOUTHERN TEXAS THESE PAST COUPLE OF DAYS, THIS UNRELENTING HEAT
WAVE IS SHOWING SIGNS OF EXPANDING FARTHER NORTHEAST DURING THE
WEEKEND IN RESPONSE TO AN UPPER-LEVEL TROUGH CURRENTLY GETTING
READY MOVE OFF THE NORTHERN ROCKIES. THE LOW PRESSURE SYSTEM THAT
IS FORECAST TO DEVELOP AND MOVE ACROSS THE NORTHERN PLAINS DURING
THE WEEKEND WILL ALSO BE RESPONSIBLE FOR A MODERATE RISK OF FLASH
FLOODING OVER PORTIONS OF MONTANA AS WELL AS AN ENHANCED RISK OF
SEVERE THUNDERSTORMS OVER THE NORTHERN AND CENTRAL HIGH PLAINS
THROUGH TONIGHT. BY SATURDAY, MODERATE TO LOCALLY HEAVY RAIN IS
FORECAST TO TRACK FARTHER EAST ACROSS THE NORTHERN PLAINS MAINLY
NORTH OF THE LOW PRESSURE CENTER. FARTHER SOUTH, THUNDERSTORMS
THAT ARE EXPECTED TO BE TRIGGERED AHEAD OF A WELL-DEVELOPED COLD
FRONT COULD BECOME SEVERE AS THEY REACH THE MIDWEST LATER IN THE
AFTERNOON INTO THE EVENING. BY SUNDAY MORNING, THE HIGHEST THREAT
OF SEVERE THUNDERSTORMS SHOULD BE MOVING INTO THE OHIO/TENNESSEE
VALLEY WHILE MODERATE RAIN SHIFTS FURTHER EAST ACROSS THE UPPER
MIDWEST AHEAD OF AND TO NORTH OF THE LOW PRESSURE SYSTEM.
ELSEWHERE ALONG THE EAST COAST, PLENTY OF ANTECEDENT MOISTURE
ASSOCIATED WITH A WEAKENING LOW PRESSURE SYSTEM WILL KEEP A CHANCE
OF SCATTERED SHOWERS WITH EMBEDDED THUNDERSTORMS, AS WELL AS AREAS
OF LIGHT RAIN AND DRIZZLE THROUGH THE WEEKEND. THE SOUTHEAST AND
THE SOUTHERN MID-ATLANTIC WILL HAVE A CHANCE TO DRY OUT BUT NEW
ENGLAND WILL SEE RAIN CHANCES INCREASE THE WEEKEND PROGRESSES.
SOME LINGERING MOISTURE WILL ALSO KEEP SOME SCATTERED SHOWERS OVER
THE INTERIOR PACIFIC NORTHWEST.
MEANWHILE, THE EXCESSIVE HEAT ACROSS THE SOUTH WILL CONTINUE WITH
POTENTIALLY MORE ALL-TIME RECORD HIGH HEAT INDICES THROUGH THE
WEEKEND AS THE NORTHERN EDGE OF THE HEAT WAVE BEGINS TO SPREAD
FARTHER NORTHEAST. PLEASE STAY SAFE IN THIS ONGOING DANGEROUS
HEAT WAVE!
KONG
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