793
FXUS01 KWBC 040601
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
201 AM EDT SAT NOV 04 2023
VALID 12Z SAT NOV 04 2023 - 12Z MON NOV 06 2023
...MODEST ATMOSPHERIC RIVER ACTIVITY TO BRING MULTIPLE ROUNDS OF
BENEFICIAL PRECIPITATION ACROSS THE PACIFIC NORTHWEST AND THE
NORTHERN ROCKIES THIS WEEKEND INTO EARLY NEXT WEEK...
...MOST OF THE COUNTRY EXPERIENCES MODEST WARMTH THIS WEEKEND
BEFORE COOL PACIFIC AIR ENTERS THROUGH THE WEST...
PERSISTENT TROUGHING OVER THE PACIFIC NORTHWEST WILL GENERATE
MODERATE TO LOCALLY HEAVY PRECIPITATION ACROSS MUCH OF THE
NORTHWEST THIS WEEKEND INTO EARLY NEXT WEEK. THE FIRST ROUND OF
PRECIP WILL BE ALMOST COMPLETELY IN THE FORM OF RAIN (SAVE FOR
HIGHEST MOUNTAIN PEAKS) ACROSS THE WASHINGTON AND OREGON COASTS
TODAY. ISOLATED INSTANCES OF HEAVY RAINFALL OVER THE OLYMPICS AND
COASTAL RANGES OF SOUTHERN OREGON INTO NORTHERN CALIFORNIA WILL
SUPPORT A MARGINAL RISK OF FLASH FLOODING AS A RESULT. THE NEXT
ROUND OF PRECIP ARRIVES LATE SUNDAY AFTERNOON AND CARRIES WITH IT
ANOTHER MARGINAL RISK OF FLASH FLOODING OVER THE IMMEDIATE COASTAL
AREAS OF THE PACIFIC NORTHWEST, PARTLY DUE TO HIGH SOIL MOISTURE
CAUSED BY RECENT HEAVY RAIN. MOISTURE FROM THIS ATMOSPHERIC RIVER
ACTIVITY IS EXPECTED TO SPREAD INTO THE NORTHERN ROCKIES IN THE
FORM OF SNOW SHOWERS THIS WEEKEND.
RELATIVELY ZONAL FLOW ACROSS MUCH OF THE COUNTRY WILL SUPPORT
ABOVE AVERAGE TEMPERATURES THIS WEEKEND, WHILE SHORTWAVE ENERGY
MOVING THROUGH THE SOUTHEAST WILL LEAD TO AVERAGE TO BELOW AVERAGE
TEMPERATURES. THE UPPER TROUGH RESPONSIBLE FOR ATMOSPHERIC RIVER
ACTIVITY OVER THE PACIFIC NORTHWEST THIS WEEKEND WILL BRING COOL
PACIFIC AIR INTO THE WEST BY EARLY NEXT WEEK.
KEBEDE
GRAPHICS AVAILABLE AT
HTTPS://WWW.WPC.NCEP.NOAA.GOV/BASICWX/BASICWX_NDFD.PHP
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page