000
FGUS76 KPQR 101003 AAA
ESFPQR
ORZ001>008-010>016-WAZ019>022-039-040-045-046-110000-

HYDROLOGIC OUTLOOK
NATIONAL WEATHER SERVICE PORTLAND OR
203 AM PST WED NOV 10 2021

...POTENTIAL FOR RIVER FLOODING THURSDAY THROUGH SATURDAY ALONG 
CREEKS AND RIVERS IN SOUTHWEST WASHINGTON AND NORTHWEST OREGON...

...POTENTIAL FOR DEBRIS FLOWS OVER AND NEAR THE LIONSHEAD, BEACHIE 
CREEK, AND RIVERSIDE BURN AREAS...

...LANDSLIDES POSSIBLE NEAR STEEP TERRAIN...

PERIODS OF MODERATE TO HEAVY RAIN WILL BEGIN WEDNESDAY NIGHT AS A 
WARM FRONT MOVES NORTHWARD THROUGH THE AREA. PERIODS OF HEAVY RAIN 
LOOK TO CONTINUE THURSDAY THROUGH FRIDAY AS AN ATMOSPHERIC RIVER 
PUSHES INTO THE PACIFIC NORTHWEST. SNOW LEVELS WILL BE HIGH DURING 
THIS RAIN EVENT, GENERALLY ABOVE 9000 FEET.

TOTAL RAIN AMOUNTS WEDNESDAY THROUGH FRIDAY NIGHT MAY EXCEED 6 TO 12 
INCHES IN THE SOUTH WASHINGTON CASCADES, NORTH OREGON CASCADES, 
NORTH COAST RANGE, AND WILLAPA HILLS. 1 TO 3 INCHES OF RAIN IS 
POSSIBLE FOR THE INTERIOR LOWLANDS, AND 2 TO 5 INCHES ALONG THE 
COAST. RAIN AMOUNTS THIS HIGH MAY BE SUFFICIENT TO CAUSE FLOODING OF 
CREEKS AND RIVERS IN SOUTHWEST WASHINGTON AND NORTHWEST OREGON, 
ESPECIALLY CREEKS AND RIVERS DRAINING THE NORTH COAST RANGE AND 
CASCADES. AT THIS TIME, THE BEST CHANCE FOR RIVER FLOODING APPEARS 
TO BE ALONG THE GRAYS RIVER NEAR ROSBURG, THE WILSON RIVER NEAR 
TILLAMOOK, THE TRASK RIVER NEAR TILLAMOOK, AND THE NEHALEM RIVER 
NEAR FOSS. CREEKS AND SMALLER RIVERS IN THE WILLAMETTE AND COASTAL 
TRIBUTARIES MAY ALSO BE IMPACTED. FLOODING POTENTIAL IS LOW ALONG 
THE MAINSTEM RIVERS.

THERE IS ALSO POTENTIAL FOR DEBRIS FLOWS OVER AND NEAR THE BURNED 
AREAS IN THE CASCADES. THIS INCLUDES THE LIONSHEAD, BEACHIE CREEK, 
AND RIVERSIDE BURN AREAS. DEBRIS FLOW POTENTIAL IS LOWEST OVER THE 
HOLIDAY FARM BURN AREA, AS THE HEAVIEST RAIN LOOKS TO OCCUR TO THE 
NORTH OF THIS BURN AREA. LANDSLIDES NEAR STEEP TERRAIN CANNOT BE 
RULED OUT EITHER.

THE BIG MESSAGE WITH THIS OUTLOOK IS TO KEEP AN EYE ON THE WEATHER 
AND RIVER FORECASTS THIS WEEK. IF THE THREAT OF FLOODING AFFECTS 
YOU, THIS IS A GREAT TIME TO REVIEW YOUR ACTION PLAN IN CASE 
FLOODING OCCURS. PLEASE MONITOR THE LATEST RIVER FORECASTS FROM THE 
NATIONAL WEATHER SERVICE FOR ADDITIONAL INFORMATION.

$$

TK/KRIEDERMAN
072 
FGUS76 KPQR 101003 AAA
ESFPQR
ORZ001>008-010>016-WAZ019>022-039-040-045-046-110000-

HYDROLOGIC OUTLOOK
NATIONAL WEATHER SERVICE PORTLAND OR
203 AM PST WED NOV 10 2021

...POTENTIAL FOR RIVER FLOODING THURSDAY THROUGH SATURDAY ALONG 
CREEKS AND RIVERS IN SOUTHWEST WASHINGTON AND NORTHWEST OREGON...

...POTENTIAL FOR DEBRIS FLOWS OVER AND NEAR THE LIONSHEAD, BEACHIE 
CREEK, AND RIVERSIDE BURN AREAS...

...LANDSLIDES POSSIBLE NEAR STEEP TERRAIN...

PERIODS OF MODERATE TO HEAVY RAIN WILL BEGIN WEDNESDAY NIGHT AS A 
WARM FRONT MOVES NORTHWARD THROUGH THE AREA. PERIODS OF HEAVY RAIN 
LOOK TO CONTINUE THURSDAY THROUGH FRIDAY AS AN ATMOSPHERIC RIVER 
PUSHES INTO THE PACIFIC NORTHWEST. SNOW LEVELS WILL BE HIGH DURING 
THIS RAIN EVENT, GENERALLY ABOVE 9000 FEET.

TOTAL RAIN AMOUNTS WEDNESDAY THROUGH FRIDAY NIGHT MAY EXCEED 6 TO 12 
INCHES IN THE SOUTH WASHINGTON CASCADES, NORTH OREGON CASCADES, 
NORTH COAST RANGE, AND WILLAPA HILLS. 1 TO 3 INCHES OF RAIN IS 
POSSIBLE FOR THE INTERIOR LOWLANDS, AND 2 TO 5 INCHES ALONG THE 
COAST. RAIN AMOUNTS THIS HIGH MAY BE SUFFICIENT TO CAUSE FLOODING OF 
CREEKS AND RIVERS IN SOUTHWEST WASHINGTON AND NORTHWEST OREGON, 
ESPECIALLY CREEKS AND RIVERS DRAINING THE NORTH COAST RANGE AND 
CASCADES. AT THIS TIME, THE BEST CHANCE FOR RIVER FLOODING APPEARS 
TO BE ALONG THE GRAYS RIVER NEAR ROSBURG, THE WILSON RIVER NEAR 
TILLAMOOK, THE TRASK RIVER NEAR TILLAMOOK, AND THE NEHALEM RIVER 
NEAR FOSS. CREEKS AND SMALLER RIVERS IN THE WILLAMETTE AND COASTAL 
TRIBUTARIES MAY ALSO BE IMPACTED. FLOODING POTENTIAL IS LOW ALONG 
THE MAINSTEM RIVERS.

THERE IS ALSO POTENTIAL FOR DEBRIS FLOWS OVER AND NEAR THE BURNED 
AREAS IN THE CASCADES. THIS INCLUDES THE LIONSHEAD, BEACHIE CREEK, 
AND RIVERSIDE BURN AREAS. DEBRIS FLOW POTENTIAL IS LOWEST OVER THE 
HOLIDAY FARM BURN AREA, AS THE HEAVIEST RAIN LOOKS TO OCCUR TO THE 
NORTH OF THIS BURN AREA. LANDSLIDES NEAR STEEP TERRAIN CANNOT BE 
RULED OUT EITHER.

THE BIG MESSAGE WITH THIS OUTLOOK IS TO KEEP AN EYE ON THE WEATHER 
AND RIVER FORECASTS THIS WEEK. IF THE THREAT OF FLOODING AFFECTS 
YOU, THIS IS A GREAT TIME TO REVIEW YOUR ACTION PLAN IN CASE 
FLOODING OCCURS. PLEASE MONITOR THE LATEST RIVER FORECASTS FROM THE 
NATIONAL WEATHER SERVICE FOR ADDITIONAL INFORMATION.

$$

TK/KRIEDERMAN

  US Dept of Commerce
  National Oceanic and Atmospheric Administration
  National Weather Service
  1325 East West Highway
  Silver Spring, MD 20910
  Page Author: NWSChat Administration Team
Disclaimer
Information Quality
Credits
Glossary
Privacy Policy  
Freedom of Information Act (FOIA)  
About Us  
Career Opportunities