30 mb zonal wind index - CDAS ORIGINAL DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 1.85 4.11 0.87 -3.58 -12.91 -19.61 -21.28 -22.25 -22.71 -23.33 -22.21 -17.00 1980 -10.12 -5.66 -2.92 2.30 6.23 7.32 8.73 9.60 12.65 13.09 12.14 9.72 1981 8.21 6.71 7.50 8.27 3.00 -3.50 -5.24 -8.25 -8.60 -9.54 -9.63 -12.32 1982 -12.53 -14.72 -16.68 -15.56 -15.27 -15.95 -8.97 -1.60 4.19 8.26 9.50 10.34 1983 10.84 11.38 12.16 13.80 11.92 3.11 -3.40 -6.54 -7.76 -10.13 -10.30 -11.43 1984 -10.66 -11.35 -12.99 -14.59 -15.06 -17.98 -25.40 -27.91 -25.45 -21.60 -13.20 -8.17 1985 -0.38 4.16 6.35 11.10 13.55 13.88 11.09 11.07 11.70 11.83 11.62 9.87 1986 8.73 10.14 11.95 9.10 3.55 -2.17 -5.26 -9.61 -10.22 -9.61 -8.02 -10.52 1987 -9.94 -11.38 -14.24 -16.21 -20.06 -21.48 -13.97 -0.61 5.86 9.34 9.22 8.40 1988 7.80 6.16 5.85 6.58 5.45 0.41 -3.97 -2.59 -2.31 -1.54 -0.85 -2.44 1989 -2.88 -3.57 -1.64 -1.94 -5.47 -9.39 -13.87 -16.99 -18.84 -21.31 -19.02 -13.55 1990 -8.72 -6.75 0.94 5.71 11.45 12.89 12.53 12.62 13.20 12.38 11.54 10.67 1991 8.70 8.43 8.99 10.68 3.81 -3.35 -10.37 -14.70 -13.97 -12.22 -12.28 -12.69 1992 -13.97 -14.34 -16.85 -17.80 -15.97 -15.35 -12.06 -4.76 1.29 3.93 6.32 8.18 1993 9.62 10.79 11.35 12.59 13.55 6.54 0.37 -1.21 -1.15 -4.05 -5.77 -6.01 1994 -7.65 -9.85 -11.31 -14.72 -18.04 -23.09 -28.66 -27.03 -19.08 -10.30 -0.31 5.92 1995 8.37 8.00 8.78 11.78 14.91 15.61 11.73 9.50 6.97 3.42 -0.86 -4.65 1996 -5.80 -6.91 -9.94 -11.09 -14.89 -17.04 -23.94 -25.86 -26.03 -23.41 -18.09 -9.87 1997 -3.59 1.93 4.49 9.20 12.50 14.67 14.57 11.36 12.00 11.39 8.22 3.04 1998 0.74 -2.88 -4.99 -7.16 -12.56 -17.61 -22.62 -23.96 -20.99 -18.24 -13.29 -5.16 1999 1.40 3.97 6.79 12.14 15.05 15.18 13.42 12.26 11.29 9.43 6.54 5.82 2000 4.62 4.48 5.72 5.17 -0.30 -7.26 -13.25 -15.35 -15.49 -14.21 -14.57 -13.60 2001 -15.02 -14.84 -16.22 -17.29 -20.44 -23.01 -24.54 -21.68 -14.31 -10.83 -3.89 1.47 2002 4.63 7.99 9.31 14.02 14.15 13.25 10.05 10.59 8.89 7.66 4.45 -0.51 2003 -1.40 -1.45 -3.31 -8.57 -13.93 -17.72 -23.00 -24.65 -22.52 -20.35 -17.87 -11.39 2004 -4.84 2.60 5.45 10.45 12.96 11.75 9.95 8.81 7.21 7.83 4.40 2.26 2005 -0.46 -0.88 -0.34 -6.65 -15.10 -20.60 -24.21 -25.87 -27.81 -28.77 -29.55 -25.05 2006 -18.84 -11.25 -0.39 5.00 10.35 11.46 10.75 10.75 10.19 10.86 10.09 6.20 2007 2.60 2.42 1.24 -5.19 -14.07 -21.34 -24.93 -27.42 -28.15 -29.06 -27.61 -19.49 2008 -12.43 -4.71 2.18 6.42 11.52 13.45 13.26 11.62 11.59 11.04 9.12 10.46 2009 10.71 12.33 11.44 9.10 1.55 -5.48 -12.21 -14.46 -13.82 -11.70 -13.83 -15.57 2010 -16.02 -16.98 -19.68 -23.57 -26.28 -25.05 -9.85 1.44 6.57 10.83 12.16 10.96 2011 9.18 10.05 10.44 10.71 10.02 3.90 0.44 -0.49 -2.30 -3.05 -9.09 -16.25 2012 -16.09 -15.26 -16.75 -17.63 -22.06 -25.90 -27.84 -27.94 -26.61 -24.51 -18.95 -10.03 2013 -6.07 -1.24 2.85 8.39 12.64 13.38 14.28 14.66 13.12 11.69 12.45 12.55 2014 13.13 12.68 11.71 7.14 -2.81 -13.98 -19.28 -21.65 -23.24 -23.86 -23.65 -25.35 2015 -26.70 -28.62 -28.15 -24.38 -12.34 2.18 7.45 10.96 12.07 13.38 12.79 11.39 2016 9.34 6.77 3.16 0.64 2.37 3.86 6.25 10.07 10.48 12.83 14.16 15.09 2017 14.92 14.78 14.35 13.88 8.01 -3.18 -10.48 -14.42 -15.28 -16.79 -17.20 -18.12 2018 -19.02 -19.37 -19.77 -21.41 -24.23 -28.45 -29.10 -20.41 -9.91 -2.79 3.36 8.05 2019 9.02 9.25 11.82 13.36 14.59 14.36 10.96 9.97 8.25 7.27 5.07 1.66 2020 -2.51 -3.20 -4.36 -5.03 -4.86 -2.78 0.34 4.78 7.95 10.80 11.15 10.37 2021 10.19 8.92 9.75 5.25 0.31 -6.93 -13.17 -13.82 -16.56 -19.14 -19.78 -21.58 2022 -23.01 -25.19 -26.34 -26.20 -19.70 -3.78 3.04 7.87 9.80 10.93 12.45 11.70 2023 12.50 9.80 10.93 12.89 9.26 0.72 -5.96 -9.88 -13.58 -16.98 -19.80 -22.69 2024 -24.56 -25.54-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2025-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2026-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2027-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2028-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 30 mb zonal wind index - CDAS ANOMALY YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 3.79 5.12 1.14 -3.61 -11.30 -15.10 -14.55 -15.55 -17.19 -18.71 -18.35 -14.04 1980 -8.18 -4.65 -2.65 2.27 7.84 11.83 15.46 16.30 18.17 17.71 16.00 12.68 1981 10.15 7.72 7.77 8.24 4.61 1.01 1.49 -1.55 -3.08 -4.92 -5.77 -9.36 1982 -10.59 -13.71 -16.41 -15.59 -13.66 -11.44 -2.24 5.10 9.71 12.88 13.36 13.30 1983 12.78 12.39 12.43 13.77 13.53 7.62 3.33 0.16 -2.24 -5.51 -6.44 -8.47 1984 -8.72 -10.34 -12.72 -14.62 -13.45 -13.47 -18.67 -21.21 -19.93 -16.98 -9.34 -5.21 1985 1.56 5.17 6.62 11.07 15.16 18.39 17.82 17.77 17.22 16.45 15.48 12.83 1986 10.67 11.15 12.22 9.07 5.16 2.34 1.47 -2.91 -4.70 -4.99 -4.16 -7.56 1987 -8.00 -10.37 -13.97 -16.24 -18.45 -16.97 -7.24 6.09 11.38 13.96 13.08 11.36 1988 9.74 7.17 6.12 6.55 7.06 4.92 2.76 4.11 3.21 3.08 3.01 0.52 1989 -0.94 -2.56 -1.37 -1.97 -3.86 -4.88 -7.14 -10.29 -13.32 -16.69 -15.16 -10.59 1990 -6.78 -5.74 1.21 5.68 13.06 17.40 19.26 19.32 18.72 17.00 15.40 13.63 1991 10.64 9.44 9.26 10.65 5.42 1.16 -3.64 -8.00 -8.45 -7.60 -8.42 -9.73 1992 -12.03 -13.33 -16.58 -17.83 -14.36 -10.84 -5.33 1.94 6.81 8.55 10.18 11.14 1993 11.56 11.80 11.62 12.56 15.16 11.05 7.10 5.49 4.37 0.57 -1.91 -3.05 1994 -5.71 -8.84 -11.04 -14.75 -16.43 -18.58 -21.93 -20.33 -13.56 -5.68 3.55 8.88 1995 10.31 9.01 9.05 11.75 16.52 20.12 18.46 16.20 12.49 8.04 3.00 -1.69 1996 -3.86 -5.90 -9.67 -11.12 -13.28 -12.53 -17.21 -19.16 -20.51 -18.79 -14.23 -6.91 1997 -1.65 2.94 4.76 9.17 14.11 19.18 21.30 18.06 17.52 16.01 12.08 6.00 1998 2.68 -1.87 -4.72 -7.19 -10.95 -13.10 -15.89 -17.26 -15.47 -13.62 -9.43 -2.20 1999 3.34 4.98 7.06 12.11 16.66 19.69 20.15 18.96 16.81 14.05 10.40 8.78 2000 6.56 5.49 5.99 5.14 1.31 -2.75 -6.52 -8.65 -9.97 -9.59 -10.71 -10.64 2001 -13.08 -13.83 -15.95 -17.32 -18.83 -18.50 -17.81 -14.98 -8.79 -6.21 -0.03 4.43 2002 6.57 9.00 9.58 13.99 15.76 17.76 16.78 17.29 14.41 12.28 8.31 2.45 2003 0.54 -0.44 -3.04 -8.60 -12.32 -13.21 -16.27 -17.95 -17.00 -15.73 -14.01 -8.43 2004 -2.90 3.61 5.72 10.42 14.57 16.26 16.68 15.51 12.73 12.45 8.26 5.22 2005 1.48 0.13 -0.07 -6.68 -13.49 -16.09 -17.48 -19.17 -22.29 -24.15 -25.69 -22.09 2006 -16.90 -10.24 -0.12 4.97 11.96 15.97 17.48 17.45 15.71 15.48 13.95 9.16 2007 4.54 3.43 1.51 -5.22 -12.46 -16.83 -18.20 -20.72 -22.63 -24.44 -23.75 -16.53 2008 -10.49 -3.70 2.45 6.39 13.13 17.96 19.99 18.32 17.11 15.66 12.98 13.42 2009 12.65 13.34 11.71 9.07 3.16 -0.97 -5.48 -7.76 -8.30 -7.08 -9.97 -12.61 2010 -14.08 -15.97 -19.41 -23.60 -24.67 -20.54 -3.12 8.14 12.09 15.45 16.02 13.92 2011 11.12 11.06 10.71 10.68 11.63 8.41 7.17 6.21 3.22 1.57 -5.23 -13.29 2012 -14.15 -14.25 -16.48 -17.66 -20.45 -21.39 -21.11 -21.24 -21.09 -19.89 -15.09 -7.07 2013 -4.13 -0.23 3.12 8.36 14.25 17.89 21.01 21.36 18.64 16.31 16.31 15.51 2014 15.07 13.69 11.98 7.11 -1.20 -9.47 -12.55 -14.95 -17.72 -19.24 -19.79 -22.39 2015 -24.76 -27.61 -27.88 -24.41 -10.73 6.69 14.18 17.66 17.59 18.00 16.65 14.35 2016 11.28 7.78 3.43 0.61 3.98 8.37 12.98 16.77 16.00 17.45 18.02 18.05 2017 16.86 15.79 14.62 13.85 9.62 1.33 -3.75 -7.72 -9.76 -12.17 -13.34 -15.16 2018 -17.08 -18.36 -19.50 -21.44 -22.62 -23.94 -22.37 -13.71 -4.39 1.83 7.22 11.01 2019 10.96 10.26 12.09 13.33 16.20 18.87 17.69 16.67 13.77 11.89 8.93 4.62 2020 -0.57 -2.19 -4.09 -5.06 -3.25 1.73 7.07 11.48 13.47 15.42 15.01 13.33 2021 12.13 9.93 10.02 5.22 1.92 -2.42 -6.44 -7.12 -11.04 -14.52 -15.92 -18.62 2022 -21.07 -24.18 -26.07 -26.23 -18.09 0.73 9.77 14.57 15.32 15.55 16.31 14.66 2023 14.44 10.81 11.20 12.86 10.87 5.23 0.77 -3.18 -8.06 -12.36 -15.94 -19.73 2024 -22.62 -24.53-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2025-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2026-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2027-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2028-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 30 mb zonal wind index - CDAS STANDARDIZED DATA YEAR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC 1979 0.31 0.42 0.09 -0.29 -0.92 -1.23 -1.19 -1.27 -1.40 -1.52 -1.50 -1.14 1980 -0.67 -0.38 -0.22 0.19 0.64 0.96 1.26 1.33 1.48 1.44 1.30 1.03 1981 0.83 0.63 0.63 0.67 0.38 0.08 0.12 -0.13 -0.25 -0.40 -0.47 -0.76 1982 -0.86 -1.12 -1.34 -1.27 -1.11 -0.93 -0.18 0.42 0.79 1.05 1.09 1.08 1983 1.04 1.01 1.01 1.12 1.10 0.62 0.27 0.01 -0.18 -0.45 -0.52 -0.69 1984 -0.71 -0.84 -1.04 -1.19 -1.10 -1.10 -1.52 -1.73 -1.62 -1.38 -0.76 -0.42 1985 0.13 0.42 0.54 0.90 1.23 1.50 1.45 1.45 1.40 1.34 1.26 1.05 1986 0.87 0.91 1.00 0.74 0.42 0.19 0.12 -0.24 -0.38 -0.41 -0.34 -0.62 1987 -0.65 -0.84 -1.14 -1.32 -1.50 -1.38 -0.59 0.50 0.93 1.14 1.07 0.93 1988 0.79 0.58 0.50 0.53 0.57 0.40 0.23 0.33 0.26 0.25 0.25 0.04 1989 -0.08 -0.21 -0.11 -0.16 -0.31 -0.40 -0.58 -0.84 -1.09 -1.36 -1.24 -0.86 1990 -0.55 -0.47 0.10 0.46 1.06 1.42 1.57 1.57 1.52 1.39 1.25 1.11 1991 0.87 0.77 0.75 0.87 0.44 0.09 -0.30 -0.65 -0.69 -0.62 -0.69 -0.79 1992 -0.98 -1.09 -1.35 -1.45 -1.17 -0.88 -0.43 0.16 0.55 0.70 0.83 0.91 1993 0.94 0.96 0.95 1.02 1.23 0.90 0.58 0.45 0.36 0.05 -0.16 -0.25 1994 -0.47 -0.72 -0.90 -1.20 -1.34 -1.51 -1.79 -1.66 -1.10 -0.46 0.29 0.72 1995 0.84 0.73 0.74 0.96 1.35 1.64 1.50 1.32 1.02 0.66 0.24 -0.14 1996 -0.31 -0.48 -0.79 -0.91 -1.08 -1.02 -1.40 -1.56 -1.67 -1.53 -1.16 -0.56 1997 -0.13 0.24 0.39 0.75 1.15 1.56 1.74 1.47 1.43 1.30 0.98 0.49 1998 0.22 -0.15 -0.38 -0.59 -0.89 -1.07 -1.29 -1.41 -1.26 -1.11 -0.77 -0.18 1999 0.27 0.41 0.58 0.99 1.36 1.60 1.64 1.54 1.37 1.14 0.85 0.72 2000 0.53 0.45 0.49 0.42 0.11 -0.22 -0.53 -0.70 -0.81 -0.78 -0.87 -0.87 2001 -1.07 -1.13 -1.30 -1.41 -1.53 -1.51 -1.45 -1.22 -0.72 -0.51 -0.00 0.36 2002 0.54 0.73 0.78 1.14 1.28 1.45 1.37 1.41 1.17 1.00 0.68 0.20 2003 0.04 -0.04 -0.25 -0.70 -1.00 -1.08 -1.33 -1.46 -1.39 -1.28 -1.14 -0.69 2004 -0.24 0.29 0.47 0.85 1.19 1.32 1.36 1.26 1.04 1.01 0.67 0.43 2005 0.12 0.01 -0.01 -0.54 -1.10 -1.31 -1.42 -1.56 -1.82 -1.97 -2.09 -1.80 2006 -1.38 -0.83 -0.01 0.41 0.97 1.30 1.42 1.42 1.28 1.26 1.14 0.75 2007 0.37 0.28 0.12 -0.42 -1.02 -1.37 -1.48 -1.69 -1.84 -1.99 -1.93 -1.35 2008 -0.85 -0.30 0.20 0.52 1.07 1.46 1.63 1.49 1.39 1.28 1.06 1.09 2009 1.03 1.09 0.95 0.74 0.26 -0.08 -0.45 -0.63 -0.68 -0.58 -0.81 -1.03 2010 -1.15 -1.30 -1.58 -1.92 -2.01 -1.67 -0.25 0.66 0.98 1.26 1.31 1.13 2011 0.91 0.90 0.87 0.87 0.95 0.68 0.58 0.51 0.26 0.13 -0.43 -1.08 2012 -1.15 -1.16 -1.34 -1.44 -1.67 -1.74 -1.72 -1.73 -1.72 -1.62 -1.23 -0.58 2013 -0.34 -0.02 0.25 0.68 1.16 1.46 1.71 1.74 1.52 1.33 1.33 1.26 2014 1.23 1.12 0.98 0.58 -0.10 -0.77 -1.02 -1.22 -1.44 -1.57 -1.61 -1.82 2015 -2.02 -2.25 -2.27 -1.99 -0.87 0.54 1.16 1.44 1.43 1.47 1.36 1.17 2016 0.92 0.63 0.28 0.05 0.32 0.68 1.06 1.37 1.30 1.42 1.47 1.47 2017 1.37 1.29 1.19 1.13 0.78 0.11 -0.31 -0.63 -0.80 -0.99 -1.09 -1.23 2018 -1.39 -1.50 -1.59 -1.75 -1.84 -1.95 -1.82 -1.12 -0.36 0.15 0.59 0.90 2019 0.89 0.84 0.98 1.09 1.32 1.54 1.44 1.36 1.12 0.97 0.73 0.38 2020 -0.05 -0.18 -0.33 -0.41 -0.27 0.14 0.58 0.94 1.10 1.26 1.22 1.09 2021 0.99 0.81 0.82 0.43 0.16 -0.20 -0.52 -0.58 -0.90 -1.18 -1.30 -1.52 2022 -1.72 -1.97 -2.12 -2.14 -1.47 0.06 0.80 1.19 1.25 1.27 1.33 1.19 2023 1.18 0.88 0.91 1.05 0.89 0.43 0.06 -0.26 -0.66 -1.01 -1.30 -1.61 2024 -1.84 -2.00-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2025-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2026-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2027-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90 2028-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90-999.90