FGUS86 KPQR 262350
 RVSPQR
 
 HYDROLOGIC STATEMENT
 NATIONAL WEATHER SERVICE PORTLAND OR
 445 PM PDT TUE APR 26 2005
 
 ...OUTLOOK FOR PORTLAND AND VANCOUVER HARBOR STAGES THIS SUMMER...
 
 PORTLAND-VANCOUVER HARBOR STAGES AS LOW AS -0.5 TO -0.8 FEET ARE 
 POSSIBLE THIS SUMMER AND EARLY FALL. STAGES THIS LOW MAY IMPACT 
 COMMERCIAL SHIPPING...HOUSE BOAT OWNERS...RECREATIONAL BOATERS AND 
 OTHER RIVER USERS ON THE LOWER WILLAMETTE AND COLUMBIA.
 
 THE CURRENT WATER SUPPLY FORECAST FOR THE LOWER COLUMBIA CALLS FOR 
 THE FIFTH LOWEST RUNOFF ON RECORD. THIS WILL RESULT IN AN EXTENDED 
 PERIOD OF LOW FLOW BELOW BONNEVILLE DAM. RIVER USERS SHOULD BE 
 ESPECIALLY WATCHFUL ON WEEKENDS INTO MONDAY MORNING WHEN OUTFLOWS 
 FROM BONNEVILLE ARE USUALLY AT THEIR LOWEST LEVELS.
 
 THE HARBOR STAGES ARE ALSO AFFECTED BY TIDAL FLUCTUATIONS...AND THE 
 LOWEST HARBOR STAGES TYPICALLY OCCUR DURING THE TIMES OF LEAST 
 AMPLITUDE BETWEEN LOW AND HIGH OCEAN TIDES. THUS...THE WEEKENDS OF 
 JUNE 18-19...JULY 30-31...AUGUST 13-14...SEPTEMBER 10-11...OCTOBER 
 1-2 AND OCTOBER 29-30 ARE THE DATES OF INCREASED POTENTIAL FOR 
 NEGATIVE STAGES AS LOW AS -0.8. THIS WOULD BE SIMILAR TO LOW LEVELS 
 THAT OCCURRED IN THE SUMMER AND FALL OF 2001...WHICH ALSO FOLLOWED A 
 VERY DRY WINTER IN THE COLUMBIA BASIN.
 
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 WEATHER.GOV/PORTLAND