50 mb zonal wind index - CDAS ORIGINAL DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 7.38 8.84 6.03 5.86 5.48 1.43 -5.54 -8.78 -10.56 -11.28 -11.08 -10.58 1980 -8.64 -8.84 -7.99 -6.65 -4.70 -2.12 .74 2.46 4.91 6.77 8.18 8.41 1981 5.57 4.27 5.02 7.27 7.53 4.25 1.93 -.05 -.56 -.63 -.62 -2.26 1982 -2.86 -5.49 -5.32 -5.03 -6.54 -11.45 -14.12 -12.07 -8.06 -3.02 2.54 5.74 1983 5.68 5.15 4.71 7.31 10.28 8.73 5.71 3.28 2.80 2.52 1.96 .15 1984 -.92 -1.57 -1.69 -.04 -1.87 -6.62 -12.40 -14.65 -14.67 -13.96 -12.61 -9.98 1985 -8.00 -6.54 -4.73 .68 4.85 5.71 5.07 5.68 6.60 8.18 8.03 6.58 1986 5.78 6.14 8.33 8.87 9.29 8.12 3.26 .42 .43 2.64 1.73 -.10 1987 .00 -.54 -1.95 -3.68 -7.22 -10.54 -14.72 -13.43 -7.96 -1.19 3.67 3.47 1988 3.80 4.05 3.47 5.54 7.16 7.12 4.83 3.39 4.05 4.52 4.77 3.27 1989 3.59 2.14 2.43 5.63 4.45 .32 -3.73 -5.76 -7.30 -8.02 -8.02 -8.44 1990 -7.65 -7.33 -7.25 -5.86 -.82 2.94 4.76 5.86 5.77 7.63 9.04 8.96 1991 6.90 5.78 6.41 7.14 7.65 4.27 -.31 -3.53 -2.58 -.98 -.98 -1.94 1992 -2.05 -1.82 -3.14 -3.67 -4.79 -9.21 -13.35 -14.20 -11.46 -8.00 -5.52 -1.33 1993 3.62 4.46 4.64 7.58 10.78 9.56 6.40 3.99 4.69 4.60 3.75 2.86 1994 1.84 .62 1.18 .17 -3.14 -10.59 -15.51 -16.93 -17.89 -14.80 -9.10 -3.79 1995 .02 1.69 2.77 5.48 8.26 8.96 8.60 7.53 5.48 5.82 4.74 2.70 1996 2.52 2.69 1.89 3.05 -.74 -5.87 -10.66 -13.00 -12.94 -12.90 -11.88 -9.27 1997 -8.51 -6.40 -6.38 -1.36 3.92 7.35 8.69 7.86 8.88 8.55 8.64 7.51 1998 5.13 4.07 3.85 4.68 -.12 -8.06 -12.57 -13.77 -14.26 -14.40 -10.65 -7.32 1999 -4.04 -3.25 -.64 2.85 7.04 8.72 8.33-999.90-999.90-999.90-999.90-999.90 2000-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 50 mb zonal wind index - CDAS ANOMALY YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 6.55 8.19 5.27 3.71 2.74 .79 -3.28 -5.44 -7.84 -10.15 -11.11 -10.80 1980 -9.47 -9.49 -8.75 -8.80 -7.44 -2.76 3.00 5.80 7.63 7.90 8.15 8.19 1981 4.74 3.62 4.26 5.12 4.79 3.61 4.19 3.29 2.16 .50 -.65 -2.48 1982 -3.69 -6.14 -6.08 -7.18 -9.28 -12.09 -11.86 -8.73 -5.34 -1.89 2.51 5.52 1983 4.85 4.50 3.95 5.16 7.54 8.09 7.97 6.62 5.52 3.65 1.93 -.07 1984 -1.75 -2.22 -2.45 -2.19 -4.61 -7.26 -10.14 -11.31 -11.95 -12.83 -12.64 -10.20 1985 -8.83 -7.19 -5.49 -1.47 2.11 5.07 7.33 9.02 9.32 9.31 8.00 6.36 1986 4.95 5.49 7.57 6.72 6.55 7.48 5.52 3.76 3.15 3.77 1.70 -.32 1987 -.83 -1.19 -2.71 -5.83 -9.96 -11.18 -12.46 -10.09 -5.24 -.06 3.64 3.25 1988 2.97 3.40 2.71 3.39 4.42 6.48 7.09 6.73 6.77 5.65 4.74 3.05 1989 2.76 1.49 1.67 3.48 1.71 -.32 -1.47 -2.42 -4.58 -6.89 -8.05 -8.66 1990 -8.48 -7.98 -8.01 -8.01 -3.56 2.30 7.02 9.20 8.49 8.76 9.01 8.74 1991 6.07 5.13 5.65 4.99 4.91 3.63 1.95 -.19 .14 .15 -1.01 -2.16 1992 -2.88 -2.47 -3.90 -5.82 -7.53 -9.85 -11.09 -10.86 -8.74 -6.87 -5.55 -1.55 1993 2.79 3.81 3.88 5.43 8.04 8.92 8.66 7.33 7.41 5.73 3.72 2.64 1994 1.01 -.03 .42 -1.98 -5.88 -11.23 -13.25 -13.59 -15.17 -13.67 -9.13 -4.01 1995 -.81 1.04 2.01 3.33 5.52 8.32 10.86 10.87 8.20 6.95 4.71 2.48 1996 1.69 2.04 1.13 .90 -3.48 -6.51 -8.40 -9.66 -10.22 -11.77 -11.91 -9.49 1997 -9.34 -7.05 -7.14 -3.51 1.18 6.71 10.95 11.20 11.60 9.68 8.61 7.29 1998 4.30 3.42 3.09 2.53 -2.86 -8.70 -10.31 -10.43 -11.54 -13.27 -10.68 -7.54 1999 -4.87 -3.90 -1.40 .70 4.30 8.08 10.59-999.90-999.90-999.90-999.90-999.90 2000-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 50 mb zonal wind index - CDAS STANDARDIZED DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 .99 1.24 .80 .56 .41 .12 -.50 -.82 -1.19 -1.54 -1.68 -1.63 1980 -1.43 -1.43 -1.32 -1.33 -1.13 -.42 .45 .88 1.15 1.19 1.23 1.24 1981 .72 .55 .64 .77 .72 .55 .63 .50 .33 .08 -.10 -.37 1982 -.56 -.93 -.92 -1.09 -1.40 -1.83 -1.79 -1.32 -.81 -.29 .38 .83 1983 .73 .68 .60 .78 1.14 1.22 1.20 1.00 .84 .55 .29 -.01 1984 -.26 -.34 -.37 -.33 -.70 -1.10 -1.53 -1.71 -1.81 -1.94 -1.91 -1.54 1985 -1.33 -1.09 -.83 -.22 .32 .77 1.11 1.36 1.41 1.41 1.21 .96 1986 .75 .83 1.14 1.02 .99 1.13 .83 .57 .48 .57 .26 -.05 1987 -.13 -.18 -.41 -.88 -1.51 -1.69 -1.88 -1.53 -.79 -.01 .55 .49 1988 .45 .51 .41 .51 .67 .98 1.07 1.02 1.02 .85 .72 .46 1989 .42 .23 .25 .53 .26 -.05 -.22 -.37 -.69 -1.04 -1.22 -1.31 1990 -1.28 -1.21 -1.21 -1.21 -.54 .35 1.06 1.39 1.28 1.32 1.36 1.32 1991 .92 .78 .85 .75 .74 .55 .29 -.03 .02 .02 -.15 -.33 1992 -.44 -.37 -.59 -.88 -1.14 -1.49 -1.68 -1.64 -1.32 -1.04 -.84 -.23 1993 .42 .58 .59 .82 1.22 1.35 1.31 1.11 1.12 .87 .56 .40 1994 .15 .00 .06 -.30 -.89 -1.70 -2.00 -2.06 -2.29 -2.07 -1.38 -.61 1995 -.12 .16 .30 .50 .83 1.26 1.64 1.64 1.24 1.05 .71 .38 1996 .26 .31 .17 .14 -.53 -.98 -1.27 -1.46 -1.54 -1.78 -1.80 -1.44 1997 -1.41 -1.07 -1.08 -.53 .18 1.01 1.66 1.69 1.75 1.46 1.30 1.10 1998 .65 .52 .47 .38 -.43 -1.32 -1.56 -1.58 -1.74 -2.01 -1.61 -1.14 1999 -.74 -.59 -.21 .11 .65 1.22 1.60-999.90-999.90-999.90-999.90-999.90 2000-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90