Comparison of beginning emergence dates to first catch dates of juvenile fall chinook and chum below Bonneville Dam,
	1999-2003.a
			Chinook										Chum
			1999		2000		2001		2002		2003		1999		2000		2001		2002		2003
	estimated beginning
	emergence date:		March 2		Jan. 26		Feb. 8		Jan. 25		Jan. 20		March 29		Feb. 3		Feb. 15		Jan. 29		Jan. 27
	water temp. (oF)
	(Bonneville Dam):		40		39		37		39		42		44		37		37		39		42
	first catch date:		March 2		Jan. 26		Feb. 22		Jan. 22		Jan. 24		March 12		Feb. 22		Feb. 8		Feb. 19		Jan. 31
	water temp. (oF)
	(Bonneville Dam):		40		39		37		42		42		41		39		37		39		39
	number caught
	on first catch date:		1		27		2		14		73		2		1		2		1		2
	mean length (mm):		36		44		47		39		45		39		36		38		36		35
	Bonneville Dam
	tailwater elevation (ft)
	at first catch date:b		21.8		18.0		11.7		14.5		11.7		19.5		14.4		11.7		28.7		16.3
	Bonneville Dam
	discharge (KCFS)
	at first catch date:b		238		203		128		160		119		241		149		122		139		151
	number of weeks
	between est. date of
	emergence and date
	of first catch:		0		0		+2		0		+0.5		-2.5		+3		-1		+2		+0.5
	a Chinook are early spawning stock (tules).
	b USACE 12:00 am reading.