212
FXUS01 KWBC 290804
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
400 AM EDT MON MAY 29 2023
VALID 12Z MON MAY 29 2023 - 12Z WED MAY 31 2023
...COOL AND DAMP WEATHER REMAINS ACROSS THE MID-ATLANTIC NEXT FEW
DAYS BUT FINE AND MILD WEATHER FARTHER NORTH ACROSS NEW ENGLAND...
...SCATTERED SHOWERS AND THUNDERSTORMS CONTINUE ACROSS THE GREAT
BASIN, NORTHERN AND CENTRAL ROCKIES, GREAT PLAINS, AND UPPER
MIDWEST FOR THE NEXT FEW DAYS...
...ABOVE AVERAGE TEMPERATURES THROUGHOUT THE NORTHERN HALF OF THE
NATION BUT COOLER THAN AVERAGE ACROSS THE SOUTHERN TIER...
A STAGNANT AND SLUGGISH UPPER-LEVEL PATTERN WILL CONTINUE ACROSS
THE U.S. MAINLAND. UPPER-LEVEL TROUGHS/LOWS WILL TEND TO SLIDE
ACROSS THE SOUTHWEST AND THE SOUTHEAST WHILE A BLOCKING RIDGE WILL
REMAIN IN PLACE ACROSS THE NORTHEAST, LEADING TO A NORTH-SOUTH
THERMAL REVERSAL WITH GENERALLY ABOVE NORMAL TEMPERATURES ACROSS
THE NORTH BUT COOLER THAN NORMAL ACROSS THE SOUTH FOR THE NEXT FEW
DAYS. CLOUDY AND DAMP WEATHER ASSOCIATED WITH THE LOW PRESSURE
SYSTEM THAT HAD MOVED ONSHORE AND WEAKENED OVER THE MID-ATLANTIC
STATES WILL BE BLOCKED BY THE AFOREMENTIONED UPPER RIDGE IN THE
NORTHEAST. THE LOW CENTER WILL BE SLOW TO EXIT THE MID-ATLANTIC
REGION THE NEXT COUPLE OF DAYS AS IT WANDERS IN NORTH CAROLINA
TODAY BEFORE DRIFTING TO THE EAST AND OFF THE MID-ATLANTIC COAST
LATER ON TUESDAY. SOME MODERATE RAINFALL WITH A RISK OF FLOODING
IS EXPECTED ACROSS THE CENTRAL APPALACHIANS AND THE EASTERN
UPSLOPE REGION THIS MORNING AS THE SURFACE LOW OVER NORTH CAROLINA
INTERACTS WITH AN UPPER LOW MOVING INTO THE SOUTHEASTERN U.S. A
SLOW TAPERING OFF OF THE RAIN IS FORECAST FOR THE NEXT COUPLE OF
DAYS WITH ONLY SOME DRIZZLE REMAINING BY WEDNESDAY MORNING.
MEANWHILE, THE MOST ACTIVE WEATHER WILL CONTINUE TO BE FOUND
ACROSS MUCH OF THE INTERMOUNTAIN WEST, INTO THE NORTHERN AND
CENTRAL ROCKIES AND FARTHER OUT INTO THE PLAINS. TROUGHING OVER
THE WEST WILL SUPPORT ADDITIONAL THUNDERSTORM ACTIVITY WHILE
IMPULSES EJECTING OUT OF THE ROCKIES WILL TRIGGER ADDITIONAL
CLUSTERS OF THUNDERSTORMS MAINLY OVER THE NORTHERN AND CENTRAL
HIGH PLAINS TODAY, NORTHERN PLAINS ON TUESDAY, AND BACK INTO THE
CENTRAL HIGH PLAINS ON WEDNESDAY. BUT OTHER AREAS UP AND DOWN THE
GREAT PLAINS WILL HAVE A CHANCE OF SEEING THESE THUNDERSTORMS
UNDER A CORRIDOR OF SOUTHERLY SURFACE WINDS, BRINGING CONTINUOUS
FLOW OF MOIST AIR FROM THE GULF OF MEXICO. FOR NORTHERN
CALIFORNIA AND THE CENTRAL/NORTHERN GREAT BASIN, SCATTERED SHOWERS
AND THUNDERSTORMS COULD OCCUR OVER REGIONS WITH SWOLLEN RIVERS AND
HIGH STREAM FLOWS DUE TO SNOWMELT, AS WELL AS SENSITIVE TERRAIN
ASSOCIATED WITH BURN SCARS.
THE TEMPERATURE OUTLOOK FOR THE NATION WILL FEATURE MOST LOCATIONS
EXPERIENCING HIGH TEMPERATURES IN THE 70S AND 80S THROUGH TUESDAY.
THIS EQUATES TO ABOVE AVERAGE TEMPERATURES THROUGHOUT THE NORTHERN
HALF OF THE COUNTRY AND BELOW AVERAGE ACROSS THE SOUTHERN TIER.
KONG
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