Name: NH Vortex Area Units: million km!U2!N Level: 500 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 1980-10-01 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-02 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-03 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-04 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-05 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-06 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-07 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-08 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-09 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-10 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-11 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-12 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-13 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-14 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-15 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-16 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-17 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-18 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-19 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-20 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-21 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-22 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-23 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-24 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1980-10-25 -9999.0 9.65 10.41 11.95 13.48 15.01 16.54 17.31 1980-10-26 -9999.0 9.64 11.10 14.02 16.94 17.07 17.21 17.28 1980-10-27 -9999.0 9.68 11.04 13.74 16.45 16.89 17.33 17.55 1980-10-28 -9999.0 9.78 11.05 13.58 16.12 16.84 17.57 17.93 1980-10-29 -9999.0 9.84 11.28 14.16 15.11 15.81 17.24 17.96 1980-10-30 -9999.0 9.87 11.30 14.16 15.00 15.63 17.23 18.03 1980-10-31 -9999.0 9.84 11.45 14.67 16.55 18.74 23.83 26.37 1980-11-01 -9999.0 9.84 10.97 13.25 15.53 16.28 17.03 17.41 1980-11-02 -9999.0 8.17 9.07 13.94 16.64 17.00 18.33 19.00 1980-11-03 -9999.0 11.51 12.24 15.52 17.25 21.36 24.88 28.28 1980-11-04 -9999.0 9.24 10.77 14.26 16.77 19.44 21.59 22.52 1980-11-05 -9999.0 9.16 11.48 13.35 16.24 19.95 24.70 28.66 1980-11-06 -9999.0 7.73 10.14 12.62 14.16 18.11 23.34 28.44 1980-11-07 -9999.0 11.59 13.27 14.80 17.65 20.81 24.40 28.44 1980-11-08 -9999.0 11.83 12.63 14.26 18.37 20.01 23.18 27.84 1980-11-09 -9999.0 12.14 13.27 14.91 18.48 19.90 21.55 24.62 1980-11-10 -9999.0 11.34 12.55 15.43 18.09 19.60 24.18 26.02 1980-11-11 -9999.0 11.86 12.49 15.43 17.65 20.28 25.78 27.78 1980-11-12 -9999.0 11.86 12.42 14.95 17.75 20.07 25.69 27.36 1980-11-13 -9999.0 12.39 12.90 16.45 18.29 21.19 26.24 27.02 1980-11-14 -9999.0 4.28 12.56 15.48 17.37 19.67 23.87 26.59 1980-11-15 16.63 11.83 12.60 15.81 16.91 20.72 23.53 28.33 1980-11-16 16.77 9.90 13.03 15.32 16.59 19.12 22.87 26.80 1980-11-17 -9999.0 5.44 11.89 14.65 16.12 18.56 23.02 25.91 1980-11-18 17.08 5.44 11.53 15.07 17.08 18.84 23.46 25.67 1980-11-19 17.35 11.03 12.08 14.84 17.52 20.79 24.90 27.52 1980-11-20 17.87 10.99 12.22 14.71 18.68 22.23 25.46 27.52 1980-11-21 18.78 8.23 12.03 14.53 18.78 21.31 26.21 27.48 1980-11-22 19.16 8.37 11.88 15.01 18.64 21.30 25.89 29.11 1980-11-23 19.91 8.47 12.09 15.42 19.27 21.18 27.75 30.87 1980-11-24 20.40 8.54 11.74 14.10 17.42 20.80 26.79 33.31 1980-11-25 22.74 8.52 12.35 15.60 17.35 22.29 27.18 33.41 1980-11-26 -9999.0 8.66 11.57 15.86 18.94 22.97 29.20 33.64 1980-11-27 27.14 8.74 11.66 15.68 19.87 24.30 28.84 33.77 1980-11-28 28.73 8.72 12.18 15.50 20.92 23.81 28.83 34.00 1980-11-29 27.46 9.00 12.34 15.43 21.09 23.41 29.04 34.28 1980-11-30 26.83 9.24 12.60 15.82 22.06 24.21 28.83 33.26 1980-12-01 26.42 9.23 13.49 16.93 22.49 24.13 28.82 33.38 1980-12-02 26.33 9.12 12.87 16.69 21.66 23.61 27.99 34.39 1980-12-03 26.26 9.04 12.77 17.23 21.40 23.21 26.35 35.31 1980-12-04 27.47 9.05 12.77 17.07 21.50 23.35 27.47 32.91 1980-12-05 27.74 8.89 12.44 17.42 20.87 23.30 29.94 34.81 1980-12-06 27.69 8.83 12.17 17.68 21.10 24.02 28.55 34.29 1980-12-07 27.40 8.91 12.22 16.28 20.78 24.08 28.24 33.93 1980-12-08 27.44 10.73 12.49 18.29 21.49 25.82 27.44 33.70 1980-12-09 27.25 10.51 12.51 19.63 21.67 25.94 27.58 33.20 1980-12-10 27.11 10.22 12.64 19.96 21.82 25.66 28.19 33.18 1980-12-11 26.90 9.09 12.86 18.86 22.83 25.89 28.33 33.69 1980-12-12 26.93 9.01 13.05 20.17 23.08 26.42 29.00 33.90 1980-12-13 26.43 8.78 12.74 19.85 23.92 26.85 30.01 33.73 1980-12-14 26.10 8.02 15.98 20.55 24.73 27.22 30.52 35.17 1980-12-15 24.72 8.24 16.61 20.67 24.79 26.82 30.75 34.27 1980-12-16 24.44 10.79 16.54 21.44 24.23 27.41 30.80 35.30 1980-12-17 24.14 10.69 17.64 21.32 24.14 26.98 31.14 34.16 1980-12-18 23.84 10.41 17.65 21.42 23.84 26.99 31.17 33.05 1980-12-19 23.27 10.26 17.57 21.64 24.18 27.21 30.26 35.32 1980-12-20 23.83 6.44 15.24 21.47 23.94 26.68 30.20 34.41 1980-12-21 23.28 10.71 17.33 21.50 23.72 26.56 30.03 32.98 1980-12-22 22.96 11.90 17.47 21.54 23.17 26.83 30.10 32.16 1980-12-23 22.92 13.45 17.52 21.67 23.42 27.91 29.76 32.34 1980-12-24 22.94 13.95 18.35 21.05 23.33 27.74 30.07 32.62 1980-12-25 22.94 13.60 18.76 21.33 23.89 27.46 30.37 36.75 1980-12-26 22.95 13.21 18.71 22.05 23.93 27.51 30.11 38.18 1980-12-27 22.83 14.98 18.80 22.50 23.95 27.07 30.27 34.97 1980-12-28 22.23 15.07 18.12 22.41 24.18 27.63 30.42 32.01 1980-12-29 22.02 13.99 18.16 22.50 24.68 27.21 30.17 31.45 1980-12-30 21.99 13.56 17.39 21.10 24.06 26.40 30.27 31.30 1980-12-31 22.51 13.39 17.55 22.30 24.97 26.55 30.57 30.77 1981-01-01 22.76 12.73 17.61 22.28 24.97 26.60 29.57 31.13 1981-01-02 23.27 12.44 16.77 22.24 24.94 26.39 29.29 31.25 1981-01-03 23.48 12.10 17.51 21.75 24.68 26.48 29.19 31.43 1981-01-04 23.83 11.74 17.27 21.87 24.31 26.50 28.93 31.32 1981-01-05 23.56 11.33 16.96 21.66 24.68 26.30 28.32 31.19 1981-01-06 23.43 11.54 16.97 21.27 23.97 25.76 27.93 31.48 1981-01-07 23.29 11.81 17.17 21.89 24.75 26.33 28.24 31.42 1981-01-08 22.77 12.17 17.67 21.60 24.84 26.19 28.36 31.50 1981-01-09 22.16 12.38 17.64 21.64 24.41 25.93 29.06 32.57 1981-01-10 25.40 12.39 17.77 21.51 24.07 25.86 29.12 37.63 1981-01-11 25.17 12.51 17.62 20.96 23.81 25.59 29.61 39.37 1981-01-12 24.98 12.51 17.38 21.62 23.29 25.28 30.08 35.48 1981-01-13 24.85 12.49 16.92 21.05 23.28 25.02 29.53 35.05 1981-01-14 24.65 12.59 17.20 22.21 23.43 24.72 30.10 31.31 1981-01-15 23.62 12.78 17.61 21.73 23.45 24.56 28.91 31.70 1981-01-16 25.95 12.76 17.39 21.26 22.71 24.57 28.53 32.22 1981-01-17 28.24 12.34 17.23 21.09 23.40 24.92 29.35 31.35 1981-01-18 30.68 11.99 17.15 20.97 23.50 25.08 30.68 32.03 1981-01-19 33.17 11.59 17.45 20.61 23.89 25.73 30.22 33.17 1981-01-20 32.75 11.15 17.73 21.31 24.30 26.00 28.97 32.75 1981-01-21 32.36 10.49 18.10 20.87 24.30 26.26 30.04 32.36 1981-01-22 32.45 10.23 18.28 21.17 24.45 26.60 29.86 32.45 1981-01-23 32.60 9.94 18.15 21.67 24.47 26.30 31.07 32.60 1981-01-24 33.16 8.17 16.47 21.31 24.60 25.96 31.47 35.64 1981-01-25 33.31 8.17 16.39 21.26 24.45 26.24 29.82 39.87 1981-01-26 33.18 8.17 16.40 21.19 24.12 25.67 29.15 36.28 1981-01-27 30.63 11.81 17.65 21.53 23.26 25.16 27.69 32.59 1981-01-28 28.08 11.97 17.28 21.04 22.36 24.71 27.74 28.52 1981-01-29 24.99 10.18 17.02 20.10 22.31 24.29 26.91 28.39 1981-01-30 24.09 5.48 15.61 19.13 21.52 23.89 26.77 28.22 1981-01-31 21.92 5.48 15.19 18.46 21.89 23.35 27.15 31.15 1981-02-01 21.73 5.55 15.15 18.51 22.22 23.70 27.12 34.67 1981-02-02 21.51 5.75 14.67 18.74 22.00 23.79 27.03 38.17 1981-02-03 21.64 5.90 13.72 18.73 21.74 23.83 26.99 38.33 1981-02-04 19.87 6.04 13.18 18.54 20.91 24.11 27.04 37.98 1981-02-05 19.01 6.23 12.47 18.20 20.56 24.22 27.18 39.92 1981-02-06 18.07 6.23 12.30 18.15 20.45 24.12 27.13 41.24 1981-02-07 18.04 6.30 14.99 18.08 21.41 24.36 27.26 41.93 1981-02-08 17.66 5.82 11.67 17.93 21.54 24.26 27.97 41.88 1981-02-09 16.96 6.29 15.21 18.01 21.83 23.98 26.77 41.55 1981-02-10 17.04 6.30 15.12 17.95 22.39 23.59 26.42 37.52 1981-02-11 16.98 4.35 13.74 18.09 22.12 23.91 26.80 33.82 1981-02-12 15.97 4.35 14.64 18.51 22.12 23.72 27.11 33.38 1981-02-13 14.83 6.55 14.82 18.62 21.86 23.97 27.38 32.82 1981-02-14 14.20 6.55 14.56 18.90 21.50 23.58 26.43 32.43 1981-02-15 13.45 6.54 14.38 17.97 21.40 23.73 26.80 35.56 1981-02-16 13.07 6.54 14.11 17.97 21.70 23.68 26.47 38.74 1981-02-17 12.63 6.53 13.97 17.95 21.13 23.43 26.54 39.30 1981-02-18 12.37 6.56 13.36 17.95 20.71 23.15 26.30 39.30 1981-02-19 12.01 2.61 11.93 16.80 20.57 22.76 26.42 39.31 1981-02-20 11.65 6.65 11.78 16.63 20.67 22.89 25.75 39.41 1981-02-21 11.30 6.70 11.30 16.79 20.63 23.10 26.50 39.41 1981-02-22 11.15 6.75 10.90 15.93 20.48 22.93 26.66 38.85 1981-02-23 11.03 6.80 11.04 16.96 20.39 22.91 27.00 38.59 1981-02-24 11.05 6.83 9.05 16.61 19.55 22.18 25.89 38.27 1981-02-25 11.13 6.92 8.38 16.14 19.11 21.77 25.48 38.04 1981-02-26 11.21 3.35 8.12 15.22 18.64 21.38 25.23 37.60 1981-02-27 11.30 3.34 10.05 15.22 17.71 21.72 24.57 34.48 1981-02-28 11.27 7.37 11.06 15.44 18.28 21.71 24.26 31.50 1981-03-01 11.16 6.42 9.93 14.29 17.96 21.01 24.25 27.98 1981-03-02 10.90 7.17 10.79 14.84 17.60 21.49 24.39 26.59 1981-03-03 10.50 6.70 10.04 13.98 17.00 21.08 24.18 28.10 1981-03-04 10.24 6.79 10.35 14.24 17.02 21.25 24.07 29.71 1981-03-05 9.88 6.76 9.59 13.69 17.05 20.65 23.73 29.01 1981-03-06 9.55 6.67 9.27 13.02 17.18 20.50 23.04 29.78 1981-03-07 9.28 6.84 9.63 13.72 16.72 20.55 23.07 29.87 1981-03-08 9.16 3.57 10.17 13.77 18.75 20.44 23.81 29.30 1981-03-09 8.91 3.71 9.22 12.92 15.78 20.33 23.70 28.51 1981-03-10 8.63 3.82 7.83 12.70 15.59 19.50 22.32 27.76 1981-03-11 8.28 3.90 7.80 12.64 16.10 19.59 22.98 27.96 1981-03-12 8.07 1.71 7.33 12.65 15.80 19.36 21.05 26.47 1981-03-13 8.83 5.59 8.84 12.78 16.02 18.97 20.51 25.46 1981-03-14 9.09 5.50 9.04 12.99 16.22 18.81 22.08 25.23 1981-03-15 9.40 6.43 9.35 12.98 16.59 18.39 19.98 24.64 1981-03-16 10.09 2.63 8.85 12.90 15.65 17.81 20.08 24.31 1981-03-17 -9999.0 6.53 9.26 12.84 14.78 17.96 23.66 25.15 1981-03-18 -9999.0 4.02 8.42 12.72 15.38 17.70 22.57 25.17 1981-03-19 -9999.0 4.01 9.56 12.69 15.38 18.13 22.55 25.21 1981-03-20 -9999.0 4.00 7.40 12.62 15.04 18.10 21.64 25.09 1981-03-21 -9999.0 4.05 7.05 12.46 14.37 17.87 20.97 25.48 1981-03-22 -9999.0 4.11 6.47 11.76 13.71 16.97 19.99 25.50 1981-03-23 -9999.0 4.15 6.20 11.20 13.97 16.11 19.43 25.65 1981-03-24 -9999.0 4.21 6.05 11.89 14.28 15.62 17.96 25.14 1981-03-25 -9999.0 4.53 5.91 11.34 14.33 15.03 17.61 24.43 1981-03-26 -9999.0 4.79 5.73 11.26 13.54 14.75 17.43 24.44 1981-03-27 5.00 5.00 5.21 10.62 12.25 14.56 16.76 24.72 1981-03-28 5.10 5.10 5.47 10.37 12.48 14.88 16.58 25.18 1981-03-29 5.10 5.10 5.84 10.45 13.12 14.74 17.55 25.94 1981-03-30 5.38 5.20 5.56 10.11 12.29 14.61 16.96 26.91 1981-03-31 -9999.0 5.24 7.31 10.37 13.61 14.97 17.12 26.60 1981-04-01 5.48 5.26 7.12 9.60 13.39 14.75 16.61 26.25 1981-04-02 5.50 4.99 5.44 8.81 13.47 14.49 16.73 25.37 1981-04-03 5.60 4.86 5.50 8.98 12.64 14.24 16.40 25.10 1981-04-04 5.54 4.86 5.49 9.25 13.23 14.37 17.06 24.76 1981-04-05 5.55 5.31 5.46 9.48 13.50 14.85 16.67 24.81 1981-04-06 5.54 3.85 5.30 8.81 12.30 13.97 16.55 25.14 1981-04-07 5.56 3.85 5.48 9.55 13.18 14.73 16.89 25.67 1981-04-08 5.42 4.85 5.40 10.12 12.87 14.23 16.47 25.89 1981-04-09 -9999.0 4.85 6.04 10.72 12.74 14.95 16.45 25.77 1981-04-10 -9999.0 4.77 6.28 10.55 12.72 15.22 16.56 25.76 1981-04-11 -9999.0 5.85 9.05 11.20 12.17 14.73 16.34 25.45 1981-04-12 -9999.0 4.81 6.79 11.05 12.13 14.79 16.74 24.18 1981-04-13 -9999.0 6.06 8.83 11.20 12.79 14.94 17.59 23.03 1981-04-14 -9999.0 10.91 11.24 12.65 13.65 15.67 19.00 22.07 1981-04-15 -9999.0 4.91 9.44 11.96 12.79 15.80 19.41 21.23 1981-04-16 -9999.0 4.07 4.71 10.52 12.42 14.53 16.69 20.39 1981-04-17 -9999.0 4.11 5.88 10.32 12.32 14.23 16.81 20.63 1981-04-18 4.47 4.11 4.40 6.78 11.20 12.59 15.81 20.58 1981-04-19 4.47 4.14 4.44 5.09 8.72 12.78 14.63 20.54 1981-04-20 -9999.0 4.78 5.19 8.23 11.12 12.63 14.75 20.25 1981-04-21 -9999.0 4.16 4.60 5.94 11.60 12.47 15.12 20.18 1981-04-22 -9999.0 4.14 4.52 5.31 10.88 11.96 15.41 20.09 1981-04-23 -9999.0 4.14 4.86 8.24 11.17 11.86 16.17 20.04 1981-04-24 -9999.0 6.41 7.75 10.43 11.60 13.08 17.63 19.91 1981-04-25 -9999.0 6.61 7.37 8.88 10.39 14.22 18.06 19.97 1981-04-26 -9999.0 6.95 7.93 9.89 11.41 13.32 17.69 19.87 1981-04-27 -9999.0 9.67 9.76 9.93 10.11 13.99 17.87 19.81 1981-04-28 -9999.0 8.86 9.96 12.17 14.37 16.58 18.78 19.88 1981-04-29 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1981-04-30 -9999.0 8.16 9.35 11.74 14.12 16.50 18.88 20.07