071
FXUS01 KWBC 080733
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
332 AM EDT THU JUN 08 2023
VALID 12Z THU JUN 08 2023 - 12Z SAT JUN 10 2023
...THERE IS A SLIGHT RISK OF EXCESSIVE RAINFALL OVER PARTS OF THE
NORTHERN INTERMOUNTAIN REGION/NORTHERN ROCKIES INTO THE NORTHERN
HIGH PLAINS BY FRIDAY...
...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 INTO THE OHIO
VALLEY/MID-ATLANTIC...
UPPER-LEVEL IMPULSES AND MOISTURE TRAPPED UNDER AN UPPER-LEVEL
RIDGE FROM THE NORTH INTERMOUNTAIN REGION TO THE UPPER MISSISSIPPI
VALLEY AND SOUTHWARD TO THE SOUTH ROCKIES TO THE CENTRAL GULF
COAST WILL PRODUCE SHOWERS AND THUNDERSTORMS THROUGH SATURDAY.
SOME OF THE SHOWERS AND THUNDERSTORMS WILL CREATE HEAVY RAIN OVER
PARTS OF IDAHO, WASHINGTON STATE, OREGON, MONTANA, AND WYOMING.
THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK OF EXCESSIVE RAINFALL
OVER PARTS OF THE NORTHERN INTERMOUNTAIN REGION/NORTHERN ROCKIES
THROUGH FRIDAY MORNING. THE ASSOCIATED HEAVY RAIN WILL CREATE
MAINLY LOCALIZED AREAS OF FLASH FLOODING, WITH URBAN AREAS, ROADS,
AND SMALL STREAMS THE MOST VULNERABLE.
ON FRIDAY, THE THREAT OF EXCESSIVE RAINFALL ELONGATES INTO THE
SOUTH DAKODA. THEREFORE, THE WPC HAS ISSUED A SLIGHT RISK OF
EXCESSIVE RAINFALL OVER PARTS OF THE NORTHERN ROCKIES/NORTHERN
HIGH PLAINS AND NORTHERN PLAINS FROM FRIDAY INTO SATURDAY 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 OVER GREAT BASIN/SOUTHWEST WILL
SLOWLY MOVE NORTHWARD TO THE NORTHERN INTERMOUNTAIN REGION WHILE
WEAKENING, AS A SECOND UPPER-LEVEL LOW OVER THE EASTERN PACIFIC
MOVES TO THE NORTHERN CALIFORNIA COAST BY SATURDAY. AS A RESULT,
THE SYSTEM WILL PRODUCE SHOWERS AND THUNDERSTORMS OVER PARTS OF
CALIFORNIA AND THE PACIFIC NORTHWEST/GREAT BASIN THROUGH SATURDAY.
THE UPPER-LEVEL TROUGHING WILL AID IN KEEPING TEMPERATURES BELOW
AVERAGE IN PARTS OF CALIFORNIA/SOUTHWEST. ADDITIONALLY, A WEAK
FRONT WILL MOVE SOUTHWARD FROM THE SOUTHEAST, TENNESSEE VALLEY,
AND MIDDLE/LOWER MISSISSIPPI VALLEY TO THE CENTRAL GULF COAST,
LOWER MISSISSIPPI VALLEY, AND SOUTHERN PLAINS BY SATURDAY. SHOWERS
AND THUNDERSTORMS WILL DEVELOP ALONG AND AHEAD OF THE BOUNDARY ON
THURSDAY INTO SATURDAY MORNING.
MEANWHILE, AN UPPER-LEVEL LOW OVER NEW ENGLAND CONTINUES OVER THE
REGION THROUGH SATURDAY. ON THURSDAY, RAIN AND DRIZZLE WILL
DEVELOP OVER PARTS OF THE NORTHEAST THROUGH SATURDAY. THE
UPPER-LEVEL LOW WILL AID IN KEEPING TEMPERATURES BELOW AVERAGE IN
PARTS OF THE NORTHEAST INTO THE OHIO VALLEY/MID-ATLANTIC.
WILDFIRE SMOKE MOVING SOUTHWARD OUT OF CANADA AND OVER THE
NORTHERN PART OF THE COUNTRY HAS TRIGGERED AIR QUALITY ALERTS OVER
PARTS OF THE GREAT LAKES/OHIO VALLEY TO THE NORTHEAST AND
MID-ATLANTIC. THE AIR QUALITY WILL BE DECREASING OVER ALABAMA AND
GEORGIA ON THURSDAY.
ZIEGENFELDER
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
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