586
FXUS01 KWBC 060741
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
340 AM EDT TUE JUN 06 2023
VALID 12Z TUE JUN 06 2023 - 12Z THU JUN 08 2023
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
CENTRAL/SOUTHERN ROCKIES/HIGH PLAINS THROUGH THURSDAY...
...MUCH COOLER THAN AVERAGE TEMPERATURES OVER MUCH OF
CALIFORNIA/SOUTHWEST AND THE NORTHEAST...
...AIR QUALITY ALERTS OVER PARTS OF THE UPPER GREAT LAKES TO THE
NORTHEAST...
UPPER-LEVEL IMPULSES AND MOISTURE TRAPPED UNDER AN UPPER-LEVEL
RIDGE FROM THE PACIFIC NORTHWEST TO THE UPPER MISSISSIPPI VALLEY
AND SOUTHWARD TO THE SOUTHWEST TO THE CENTRAL GULF COAST WILL
PRODUCE SHOWERS AND THUNDERSTORMS THROUGH THURSDAY. SOME OF THE
SHOWERS AND THUNDERSTORMS WILL CREATE HEAVY RAIN OVER PARTS OF
NORTHEASTERN NEW MEXICO ON TUESDAY. THEREFORE, THE WPC HAS ISSUED
A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE SOUTHERN
ROCKIES ON TUESDAY INTO WEDNESDAY MORNING. THE ASSOCIATED HEAVY
RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH
URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST VULNERABLE.
FURTHERMORE, THE SHOWERS AND THUNDERSTORMS, WITH HEAVY RAIN, WILL
EXPAND NORTHWARD INTO PARTS OF COLORADO AND WYOMING ON WEDNESDAY.
THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL
OVER PARTS OF THE CENTRAL/SOUTHERN ROCKIES AND SOUTHERN HIGH
PLAINS ON WEDNESDAY INTO THURSDAY MORNING. THE ASSOCIATED HEAVY
RAIN WILL CREATE MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH
URBAN AREAS, ROADS, AND SMALL STREAMS THE MOST VULNERABLE.
MOREOVER, AN UPPER-LEVEL LOW ALONG THE CALIFORNIA COAST WILL
SLOWLY MOVE INLAND AND THEN WEAKEN THROUGH THURSDAY. AS A RESULT,
THE SYSTEM WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER PARTS OF
THE STATE AND THE PACIFIC NORTHWEST/GREAT BASIN THROUGH THURSDAY.
ADDITIONALLY, A WEAK FRONT MOVING SOUTHWARD FROM THE GREAT
LAKES/NORTHEAST TO THE SOUTHEAST TO THE TENNESSEE/LOWER
MISSISSIPPI VALLEY AND WEAK UPPER-LEVEL IMPULSES OVER THE GULF
COAST WILL PRODUCE SHOWERS AND THUNDERSTORMS FROM THE OHIO
VALLEY/CENTRAL APPALACHIANS TO THE SOUTHEAST TO THE LOWER
MISSISSIPPI VALLEY THROUGH THURSDAY.
MEANWHILE, AN UPPER-LEVEL LOW OVER NEW ENGLAND MOVES SLOWLY
NORTHEASTWARD INTO SOUTHEASTERN CANADA, THEN BACK OVER MAINE BY
THURSDAY. IN ADDITION, THE SYSTEM PRODUCES SCATTED AREAS OF RAIN
WITH EMBEDDED THUNDERSTORMS ON TUESDAY. ON WEDNESDAY, RAIN AND
DRIZZLE WILL RETURN OVER THE REGION.
WILDFIRE SMOKE MOVING SOUTHWARD OUT OF CANADA AND OVER THE
NORTHERN PART OF THE COUNTRY HAS TRIGGERED AIR QUALITY ALERTS OVER
PARTS OF THE UPPER GREAT LAKES TO THE NORTHEAST. IN THE MEANTIME,
UPPER-LEVEL TROUGHING WILL BRING MUCH COOLER THAN AVERAGE
TEMPERATURES OVER MUCH OF CALIFORNIA/SOUTHWEST AND THE NORTHEAST
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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