Name: NH Vortex Area Units: million km!U2!N Level: 550 K Source: MERRA Missing: -9999.0 Climatology: 1978/1979-2011/2012 5-day boxcar smoother applied to all data. Date Data Minimum 10% 30% Mean 70% 90% Maximum 1987-10-01 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-02 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-03 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-04 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-05 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-06 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-07 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-08 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-09 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-10 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-11 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-12 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-13 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-14 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-15 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-16 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-17 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1987-10-18 -9999.0 10.22 10.43 10.85 11.93 13.33 15.64 16.79 1987-10-19 -9999.0 10.09 10.80 12.22 13.64 15.06 16.48 17.19 1987-10-20 -9999.0 9.76 10.21 11.12 12.11 13.40 16.13 17.50 1987-10-21 -9999.0 9.96 10.27 10.87 11.48 14.03 16.58 17.86 1987-10-22 -9999.0 6.48 8.70 11.16 15.85 17.77 18.72 19.44 1987-10-23 -9999.0 10.34 11.14 14.66 16.24 18.28 20.21 22.88 1987-10-24 -9999.0 6.70 9.35 12.06 16.77 18.35 20.25 23.36 1987-10-25 -9999.0 6.29 10.64 14.71 17.24 18.03 20.68 26.01 1987-10-26 -9999.0 5.91 10.95 15.75 17.37 17.50 22.08 26.63 1987-10-27 -9999.0 5.79 11.22 16.10 17.24 17.98 23.03 27.16 1987-10-28 -9999.0 5.51 11.27 15.99 17.16 18.26 22.93 27.94 1987-10-29 -9999.0 9.03 10.79 16.20 17.62 18.50 22.88 28.53 1987-10-30 -9999.0 9.96 12.27 15.99 16.84 18.19 23.08 28.55 1987-10-31 -9999.0 8.62 10.25 15.71 17.60 18.76 23.35 28.42 1987-11-01 -9999.0 9.46 12.34 16.33 17.95 21.50 23.16 27.96 1987-11-02 13.96 8.90 11.88 14.96 17.49 20.15 23.58 28.12 1987-11-03 13.41 9.05 11.28 13.86 16.89 20.28 23.74 28.26 1987-11-04 13.25 9.04 11.17 13.40 16.18 19.19 23.08 26.82 1987-11-05 12.74 9.25 11.11 13.62 16.86 18.92 22.97 25.78 1987-11-06 12.27 9.09 10.45 14.25 17.16 19.03 23.51 24.92 1987-11-07 12.84 8.89 10.75 14.45 17.13 19.17 23.34 25.40 1987-11-08 13.41 8.81 11.92 15.49 17.20 19.87 22.87 26.07 1987-11-09 14.00 10.43 13.29 15.85 17.14 20.49 23.19 26.74 1987-11-10 14.67 8.23 14.14 15.78 17.30 20.68 23.36 27.41 1987-11-11 15.46 8.91 13.84 15.77 17.59 20.74 24.08 28.13 1987-11-12 15.89 8.86 15.14 15.89 18.76 20.53 24.55 28.71 1987-11-13 16.31 8.93 14.39 16.09 19.23 20.72 24.45 27.56 1987-11-14 16.48 9.09 13.43 15.99 19.05 20.84 26.19 28.32 1987-11-15 16.19 9.14 13.10 15.82 18.92 20.61 26.29 29.37 1987-11-16 16.02 9.04 13.04 15.40 18.68 20.00 25.85 29.85 1987-11-17 15.77 9.01 12.78 15.63 17.31 20.00 24.64 28.08 1987-11-18 15.53 9.07 13.08 15.53 17.42 20.07 23.71 28.62 1987-11-19 15.47 9.11 13.24 15.18 17.46 20.71 24.25 27.31 1987-11-20 15.83 9.19 13.27 15.25 17.24 21.14 23.87 26.24 1987-11-21 15.95 9.19 13.30 15.12 16.76 20.75 24.54 26.19 1987-11-22 16.41 9.31 13.39 15.90 16.95 21.01 25.07 27.60 1987-11-23 16.20 9.30 13.35 15.39 17.33 21.16 24.67 29.00 1987-11-24 15.86 9.20 13.44 15.25 17.36 21.46 24.71 30.43 1987-11-25 15.46 9.29 13.63 15.33 16.81 20.93 24.79 31.88 1987-11-26 14.99 8.74 13.20 15.50 16.80 21.46 24.91 31.38 1987-11-27 14.23 8.57 12.66 15.57 19.72 22.33 25.05 29.46 1987-11-28 14.33 8.50 12.61 15.12 19.63 22.99 25.55 27.54 1987-11-29 14.42 8.38 12.69 14.92 19.43 23.42 26.37 27.82 1987-11-30 14.03 8.25 12.83 14.98 19.91 24.30 26.86 28.67 1987-12-01 14.17 8.16 13.10 15.26 19.98 23.54 27.03 30.89 1987-12-02 14.49 8.03 12.71 15.52 20.36 23.83 27.07 29.19 1987-12-03 14.87 8.02 13.01 15.75 20.22 24.19 27.37 31.90 1987-12-04 15.17 9.28 12.99 15.40 19.52 23.97 27.17 30.35 1987-12-05 15.16 10.85 13.10 15.58 19.30 23.25 27.03 30.03 1987-12-06 14.94 11.47 13.00 15.63 20.03 22.98 26.99 29.04 1987-12-07 14.66 11.50 13.49 15.41 20.45 22.54 26.80 28.54 1987-12-08 14.43 9.70 13.25 15.47 20.42 22.30 26.82 28.33 1987-12-09 14.78 9.69 13.94 16.70 20.67 22.29 27.64 28.33 1987-12-10 15.70 9.83 13.46 17.91 20.51 22.61 27.64 29.13 1987-12-11 16.60 9.92 14.16 17.78 21.72 24.34 28.03 31.06 1987-12-12 17.25 9.91 14.54 18.62 21.58 24.88 27.96 30.19 1987-12-13 17.23 9.99 16.25 18.28 21.64 25.11 28.90 29.49 1987-12-14 16.09 10.17 16.25 19.41 22.22 24.91 29.96 31.74 1987-12-15 13.71 11.07 15.94 19.35 22.09 24.71 27.06 33.62 1987-12-16 11.15 11.06 17.00 20.45 21.50 24.50 26.59 32.45 1987-12-17 8.71 8.71 17.68 20.54 22.41 23.82 27.70 33.34 1987-12-18 6.75 6.75 17.93 20.99 22.57 23.89 26.23 33.24 1987-12-19 5.51 5.51 17.30 21.00 22.86 24.16 28.02 32.99 1987-12-20 5.61 5.61 17.30 21.30 22.12 24.25 27.57 32.55 1987-12-21 5.72 5.72 17.67 21.30 23.25 24.07 28.49 34.21 1987-12-22 -9999.0 9.88 18.77 20.89 23.21 24.83 28.34 34.16 1987-12-23 -9999.0 8.85 19.08 21.02 23.47 25.71 31.03 31.94 1987-12-24 -9999.0 9.56 19.67 21.67 23.53 26.24 31.28 33.10 1987-12-25 -9999.0 11.12 19.74 21.39 23.62 26.62 31.11 37.20 1987-12-26 -9999.0 12.64 19.03 21.49 23.21 27.11 31.09 35.25 1987-12-27 -9999.0 12.08 18.97 21.77 23.49 27.63 31.16 32.25 1987-12-28 -9999.0 10.81 18.61 21.16 23.59 27.45 30.69 32.29 1987-12-29 -9999.0 6.20 17.99 21.10 22.85 27.05 30.73 32.17 1987-12-30 -9999.0 14.16 18.08 21.37 23.68 27.41 30.71 32.05 1987-12-31 -9999.0 14.12 17.90 21.49 24.45 27.31 30.98 31.75 1988-01-01 -9999.0 14.04 18.12 21.16 24.25 27.90 30.69 31.55 1988-01-02 -9999.0 13.74 18.14 21.16 24.25 27.17 30.37 31.37 1988-01-03 12.67 12.67 17.65 20.84 23.57 26.48 30.10 31.42 1988-01-04 -9999.0 12.77 17.97 20.73 23.54 25.81 30.07 31.68 1988-01-05 12.32 12.32 17.99 20.87 22.51 26.31 29.55 31.72 1988-01-06 12.47 12.47 17.44 19.77 23.18 26.77 29.00 31.80 1988-01-07 13.56 11.20 17.42 20.12 23.39 26.95 30.27 31.66 1988-01-08 13.82 12.86 17.30 20.02 23.56 26.85 30.32 35.77 1988-01-09 14.75 5.12 16.93 20.36 22.80 26.85 30.01 35.77 1988-01-10 17.10 12.91 17.17 20.82 23.05 26.66 30.18 35.10 1988-01-11 18.90 12.93 18.24 20.65 23.38 26.32 29.28 35.76 1988-01-12 19.82 12.93 17.64 21.53 23.41 25.95 28.81 32.37 1988-01-13 18.83 12.87 17.47 21.97 23.31 25.09 28.01 32.51 1988-01-14 17.28 12.74 17.17 21.83 22.66 25.51 28.08 33.14 1988-01-15 18.43 12.63 17.25 21.24 23.21 26.09 27.75 33.90 1988-01-16 19.78 12.31 17.33 21.30 23.20 25.61 27.76 34.48 1988-01-17 18.52 11.98 17.26 21.07 22.95 25.31 28.27 34.79 1988-01-18 17.46 11.62 17.46 20.70 23.39 26.45 28.93 34.69 1988-01-19 17.56 11.28 17.53 20.74 23.74 26.43 29.05 33.62 1988-01-20 16.36 10.92 16.60 20.74 23.77 26.73 29.05 31.69 1988-01-21 16.05 10.62 16.61 20.87 23.56 27.15 28.70 31.49 1988-01-22 16.62 10.53 16.64 21.19 23.70 26.75 29.95 30.96 1988-01-23 23.01 10.52 17.02 21.81 23.04 26.20 28.34 33.48 1988-01-24 23.45 10.54 17.33 21.85 23.23 26.17 29.19 34.09 1988-01-25 24.21 9.83 17.45 21.74 23.64 26.37 28.10 31.87 1988-01-26 26.44 9.15 17.59 20.99 23.11 25.83 27.82 29.98 1988-01-27 28.59 7.95 17.26 20.54 22.75 25.05 27.72 30.40 1988-01-28 24.95 7.57 17.01 19.91 22.62 24.71 27.02 28.40 1988-01-29 26.35 7.17 16.22 19.72 22.42 24.60 26.63 30.16 1988-01-30 27.76 6.84 13.89 19.69 22.51 24.74 27.16 29.11 1988-01-31 26.38 6.49 14.13 20.17 22.65 24.09 27.24 31.10 1988-02-01 29.40 5.11 13.50 18.93 22.73 23.69 27.35 31.36 1988-02-02 33.73 5.15 13.04 18.58 22.70 23.42 27.47 33.73 1988-02-03 37.73 6.81 14.48 18.78 21.95 23.72 27.36 37.73 1988-02-04 41.29 5.44 14.44 18.18 22.11 23.68 26.68 41.29 1988-02-05 43.26 5.44 14.16 17.81 21.12 23.56 26.39 43.26 1988-02-06 42.72 5.44 14.19 18.10 21.02 23.30 26.54 42.72 1988-02-07 42.28 5.29 14.20 18.81 21.10 23.10 26.14 42.28 1988-02-08 41.70 6.25 14.17 18.00 21.99 22.87 25.74 41.70 1988-02-09 41.03 4.85 10.66 18.42 21.33 22.90 25.32 41.03 1988-02-10 42.23 4.77 10.11 17.69 21.10 23.17 26.18 42.23 1988-02-11 41.96 4.85 10.52 17.25 20.78 22.84 25.97 41.96 1988-02-12 41.81 5.01 14.38 16.84 20.96 22.86 25.81 41.81 1988-02-13 41.75 5.12 14.36 16.65 20.94 23.07 25.62 41.75 1988-02-14 41.40 5.25 11.94 16.83 20.44 22.64 25.54 41.40 1988-02-15 41.34 5.51 14.08 17.37 20.60 22.21 25.15 41.34 1988-02-16 41.52 6.79 14.21 17.08 20.85 22.33 25.09 41.52 1988-02-17 41.05 6.78 13.93 16.82 21.07 22.55 25.17 41.05 1988-02-18 40.39 6.78 13.70 17.08 20.91 22.52 24.99 40.39 1988-02-19 40.06 2.47 12.33 16.36 20.77 22.64 24.97 40.06 1988-02-20 39.89 6.31 12.11 16.64 20.47 21.80 27.03 39.89 1988-02-21 39.97 6.36 11.09 15.66 20.41 21.99 27.06 39.97 1988-02-22 39.86 6.68 11.04 16.48 19.67 21.74 26.44 39.86 1988-02-23 39.71 7.03 9.76 16.37 19.50 21.52 25.65 39.71 1988-02-24 39.71 3.42 7.63 15.52 18.65 20.78 24.97 39.71 1988-02-25 38.34 3.44 7.89 15.13 19.06 20.87 24.52 38.34 1988-02-26 36.35 3.44 11.21 15.75 18.54 21.21 25.19 36.35 1988-02-27 32.91 3.47 10.16 14.98 17.66 20.53 24.78 32.91 1988-02-28 30.34 3.53 9.64 14.61 17.70 20.71 24.66 30.34 1988-02-29 29.18 6.86 11.88 16.62 22.49 23.93 29.13 29.18 1988-03-01 25.83 3.63 9.44 14.10 17.84 20.73 24.18 28.34 1988-03-02 22.68 3.72 7.68 13.73 17.33 19.77 23.72 26.76 1988-03-03 24.50 3.80 8.06 13.63 17.40 18.94 23.56 24.99 1988-03-04 25.52 3.86 8.21 13.47 16.93 18.88 23.86 25.52 1988-03-05 22.46 3.89 10.22 14.00 16.82 19.31 23.52 24.58 1988-03-06 23.36 3.89 9.76 13.80 16.57 19.76 23.45 25.39 1988-03-07 25.03 3.94 9.39 13.93 16.42 19.66 23.51 26.34 1988-03-08 23.91 4.01 8.99 13.56 16.07 19.51 23.17 24.28 1988-03-09 22.79 4.12 8.09 13.44 16.02 20.05 22.82 27.01 1988-03-10 24.08 4.19 8.32 13.30 16.24 19.73 23.03 26.47 1988-03-11 24.53 1.86 6.59 12.71 15.70 18.74 21.50 24.53 1988-03-12 24.41 1.86 7.80 13.15 16.01 18.56 22.11 27.42 1988-03-13 24.04 4.28 8.50 13.24 16.51 18.48 21.54 26.49 1988-03-14 23.73 4.25 7.39 12.71 15.91 17.99 21.25 25.28 1988-03-15 22.88 4.21 6.94 12.97 16.33 17.25 21.34 24.61 1988-03-16 22.09 2.04 5.78 12.77 15.89 17.00 21.11 23.56 1988-03-17 20.90 4.20 6.78 12.86 15.85 16.86 20.55 22.34 1988-03-18 20.04 4.18 6.51 13.10 15.74 16.26 19.81 22.52 1988-03-19 19.57 4.15 6.20 12.62 14.78 16.61 19.83 22.45 1988-03-20 19.07 4.19 6.38 12.76 14.46 16.66 19.89 22.50 1988-03-21 18.97 4.22 7.30 12.34 14.20 16.71 19.92 22.50 1988-03-22 19.49 4.23 6.27 11.84 13.27 15.76 18.74 22.37 1988-03-23 19.98 4.29 6.58 11.62 14.26 15.64 19.62 22.08 1988-03-24 17.47 4.35 6.36 11.85 14.05 15.24 17.19 21.82 1988-03-25 15.26 1.42 5.99 10.52 13.01 15.29 16.31 21.83 1988-03-26 12.70 4.39 6.31 11.63 12.75 14.81 16.35 22.42 1988-03-27 9.87 4.44 6.29 10.89 12.66 14.65 16.43 22.65 1988-03-28 7.03 4.57 5.99 10.73 12.67 14.46 16.76 23.06 1988-03-29 6.94 4.56 6.20 10.24 11.83 13.35 16.19 23.48 1988-03-30 7.20 4.53 6.41 10.49 11.78 13.60 16.11 23.05 1988-03-31 7.45 4.56 6.56 9.91 12.37 15.25 17.22 22.02 1988-04-01 7.68 4.61 6.56 9.81 12.49 15.37 16.20 21.93 1988-04-02 7.82 4.58 6.51 9.74 12.60 14.23 16.36 22.42 1988-04-03 7.89 4.59 6.39 8.96 12.72 14.43 16.56 22.84 1988-04-04 7.92 4.67 6.39 9.33 13.21 14.86 16.58 23.85 1988-04-05 7.97 4.79 6.45 9.43 13.08 14.72 16.47 24.86 1988-04-06 8.02 4.87 6.24 8.82 12.37 14.32 16.22 25.41 1988-04-07 8.06 3.13 5.77 8.05 11.76 13.94 16.23 25.38 1988-04-08 8.12 3.13 5.86 8.67 12.14 13.87 16.24 25.36 1988-04-09 8.24 5.27 6.75 8.82 12.62 14.64 16.43 25.35 1988-04-10 8.50 5.29 6.89 10.29 12.02 14.75 16.26 25.37 1988-04-11 8.64 5.25 6.99 10.26 11.71 14.16 15.84 25.30 1988-04-12 8.77 5.10 6.94 10.11 12.27 14.60 15.92 24.46 1988-04-13 8.96 5.01 6.58 10.35 12.82 14.37 16.38 23.56 1988-04-14 -9999.0 4.99 5.76 9.59 12.72 14.21 16.78 22.64 1988-04-15 -9999.0 4.93 5.55 11.61 12.98 15.81 17.72 22.01 1988-04-16 -9999.0 4.89 5.53 11.60 12.75 15.85 17.94 21.60 1988-04-17 -9999.0 4.89 5.39 5.55 11.91 13.68 15.52 21.67 1988-04-18 -9999.0 4.82 5.34 5.51 11.77 14.07 15.43 21.29 1988-04-19 -9999.0 4.72 5.33 5.51 11.46 13.93 15.02 20.88 1988-04-20 -9999.0 4.63 5.14 6.25 12.25 13.68 16.20 20.34 1988-04-21 -9999.0 4.59 5.17 5.68 9.28 12.24 15.65 19.84 1988-04-22 -9999.0 4.51 5.06 5.64 7.95 10.66 14.78 19.52 1988-04-23 -9999.0 4.48 4.68 5.68 8.34 10.71 14.40 19.81 1988-04-24 -9999.0 4.50 5.15 6.97 10.24 12.57 17.50 19.97 1988-04-25 -9999.0 4.97 5.31 7.24 10.52 12.43 17.51 20.02 1988-04-26 -9999.0 5.17 6.27 8.41 10.38 10.78 16.26 19.85 1988-04-27 -9999.0 5.17 5.74 6.89 8.04 12.76 17.48 19.84 1988-04-28 -9999.0 7.71 8.93 11.37 13.81 16.25 18.70 19.92 1988-04-29 -9999.0 4.24 4.74 5.74 6.74 12.07 17.40 20.06 1988-04-30 -9999.0 6.74 8.09 10.78 13.48 16.18 18.88 20.23