Name: NH Vortex Area Units: million km!U2!N Level: 850 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 10.98 19.36 22.08 26.58 29.21 34.36 38.10 1987-10-02 14.80 10.88 15.28 24.02 26.82 28.68 33.89 37.62 1987-10-03 -9999.0 11.02 13.82 24.41 28.29 29.24 35.54 39.58 1987-10-04 12.86 10.90 14.98 23.83 25.36 29.09 35.00 38.85 1987-10-05 12.56 3.91 13.55 22.90 25.27 28.07 33.42 36.34 1987-10-06 12.32 10.48 14.79 22.77 25.52 30.12 36.29 41.44 1987-10-07 11.85 7.25 15.15 21.70 26.29 28.49 37.21 41.16 1987-10-08 11.54 9.43 14.21 20.50 26.04 28.88 34.07 41.29 1987-10-09 11.30 9.91 14.82 22.07 26.54 29.92 35.10 41.84 1987-10-10 20.20 9.96 15.25 22.07 25.88 30.04 36.28 43.19 1987-10-11 29.01 11.64 13.93 22.56 26.46 31.44 35.22 46.77 1987-10-12 37.56 9.84 13.29 22.22 27.60 33.92 37.56 52.52 1987-10-13 46.19 9.69 14.93 21.50 26.14 31.09 38.55 50.66 1987-10-14 54.75 8.81 16.89 20.11 25.34 31.50 37.12 54.75 1987-10-15 54.31 7.95 17.03 20.18 24.04 31.47 39.30 54.31 1987-10-16 48.36 8.29 16.48 20.25 23.60 30.24 37.04 48.36 1987-10-17 43.15 8.28 17.04 20.05 24.60 26.87 34.37 44.77 1987-10-18 37.71 8.62 17.47 19.41 22.97 25.71 37.38 43.95 1987-10-19 32.18 9.02 16.18 18.90 22.46 25.81 34.45 43.43 1987-10-20 26.95 9.42 16.97 19.35 22.24 24.81 31.56 43.27 1987-10-21 25.41 9.68 17.27 18.65 21.26 24.70 32.00 43.16 1987-10-22 24.95 10.16 16.84 19.18 20.86 24.77 33.35 42.95 1987-10-23 23.84 10.40 16.38 19.28 21.52 27.02 33.14 42.84 1987-10-24 23.47 10.67 16.80 20.14 23.47 24.97 34.28 42.44 1987-10-25 22.71 10.96 16.40 20.11 22.70 26.18 34.81 41.64 1987-10-26 22.67 11.25 17.38 20.21 23.04 26.31 32.11 41.37 1987-10-27 21.07 11.43 18.20 20.56 22.66 26.13 32.30 40.76 1987-10-28 22.06 11.60 16.55 21.01 22.70 26.16 32.35 38.38 1987-10-29 21.91 11.72 16.51 20.29 22.49 25.33 32.53 37.55 1987-10-30 21.95 11.93 15.65 19.68 21.95 25.16 32.19 36.61 1987-10-31 23.44 11.89 15.43 19.00 21.77 26.65 32.77 36.53 1987-11-01 24.66 11.86 15.47 19.52 22.15 25.92 33.60 39.34 1987-11-02 24.84 13.83 15.31 19.37 23.21 25.74 33.74 39.01 1987-11-03 25.56 13.89 14.94 20.36 22.61 27.71 34.74 39.10 1987-11-04 26.19 14.01 15.19 21.04 23.39 27.57 33.25 39.00 1987-11-05 24.77 14.11 15.69 20.73 24.07 26.90 32.66 37.39 1987-11-06 23.39 14.11 16.68 20.19 23.99 27.81 30.01 39.04 1987-11-07 21.53 14.47 16.73 20.14 23.41 27.16 32.17 39.55 1987-11-08 19.60 14.67 18.02 20.14 23.23 27.19 31.19 37.06 1987-11-09 17.70 14.78 17.72 21.72 24.94 27.06 31.42 37.57 1987-11-10 17.67 15.74 17.67 22.16 25.21 27.17 32.52 41.38 1987-11-11 17.60 15.55 17.70 20.93 26.32 27.79 33.18 41.68 1987-11-12 17.28 15.29 17.39 20.90 24.88 28.20 32.41 40.59 1987-11-13 16.96 15.88 16.62 21.10 24.50 27.95 32.37 39.31 1987-11-14 16.96 15.86 17.08 20.87 24.72 26.99 32.23 38.10 1987-11-15 16.52 15.61 17.67 21.44 25.33 27.94 32.45 36.56 1987-11-16 16.02 16.02 17.24 21.82 25.21 27.77 32.08 38.59 1987-11-17 15.98 15.98 17.03 22.47 25.45 27.75 32.76 45.60 1987-11-18 15.99 15.97 17.49 22.16 25.92 28.15 32.35 44.99 1987-11-19 15.79 15.45 18.72 21.99 26.35 28.09 33.05 50.93 1987-11-20 16.06 14.69 18.13 20.98 25.16 27.46 33.67 50.07 1987-11-21 16.79 13.17 17.95 22.14 25.19 27.74 31.81 42.43 1987-11-22 16.85 12.71 17.59 22.03 25.02 26.96 32.10 42.78 1987-11-23 16.83 12.04 17.12 21.39 24.77 28.42 31.94 42.75 1987-11-24 16.88 12.65 17.08 20.39 25.50 28.42 34.55 42.79 1987-11-25 16.99 12.68 17.67 22.13 25.44 29.32 36.89 42.24 1987-11-26 16.62 12.84 17.59 23.60 25.71 29.82 39.83 43.22 1987-11-27 16.66 12.82 17.37 23.75 25.67 29.50 37.04 47.89 1987-11-28 16.72 14.78 17.12 23.15 26.41 30.73 36.62 47.44 1987-11-29 16.89 14.54 17.33 23.28 26.20 30.39 39.77 46.38 1987-11-30 16.63 13.78 17.15 23.61 25.89 30.41 40.58 46.45 1987-12-01 17.37 13.03 17.57 22.81 26.11 31.18 40.43 46.86 1987-12-02 17.79 12.51 17.86 22.19 25.52 30.63 39.96 46.88 1987-12-03 18.06 12.23 17.20 22.61 24.77 30.86 37.89 52.41 1987-12-04 17.35 11.85 16.39 21.66 25.13 28.89 38.00 51.31 1987-12-05 16.98 11.91 16.01 21.29 24.34 29.01 36.96 50.12 1987-12-06 15.94 12.23 16.33 20.96 24.72 29.86 40.23 49.55 1987-12-07 15.46 11.98 15.91 20.84 23.56 28.42 42.16 49.16 1987-12-08 16.24 13.90 16.42 20.91 23.51 28.07 42.87 50.53 1987-12-09 18.79 13.14 18.08 19.82 23.38 28.78 40.39 57.24 1987-12-10 21.72 13.24 17.59 20.62 23.80 28.83 40.73 57.18 1987-12-11 21.04 12.93 16.79 20.87 23.98 30.02 38.36 57.05 1987-12-12 20.51 13.21 18.20 21.28 23.99 29.08 40.96 56.72 1987-12-13 19.11 12.95 18.44 21.74 25.13 30.32 41.03 56.58 1987-12-14 17.19 13.19 17.38 22.25 24.49 31.48 42.63 56.34 1987-12-15 15.97 13.11 16.16 23.02 26.14 31.21 44.04 55.94 1987-12-16 15.20 13.06 15.87 22.98 27.25 31.73 41.67 55.60 1987-12-17 15.32 12.40 15.37 23.12 28.36 32.90 41.15 54.68 1987-12-18 13.59 11.76 15.14 22.84 28.57 32.62 41.87 52.81 1987-12-19 11.51 11.51 14.20 23.29 26.92 33.40 42.21 50.66 1987-12-20 8.25 8.25 14.01 23.72 26.98 32.54 42.56 49.83 1987-12-21 8.11 8.11 13.65 24.34 27.85 32.59 41.54 49.04 1987-12-22 6.74 6.74 20.92 24.34 27.77 32.21 39.84 48.41 1987-12-23 7.07 7.07 20.14 23.28 27.72 32.71 38.77 47.63 1987-12-24 7.42 7.42 19.38 23.25 27.84 32.74 37.70 46.97 1987-12-25 7.83 7.83 18.60 23.22 26.76 33.06 36.11 45.94 1987-12-26 8.34 7.82 18.68 22.96 26.88 33.18 35.98 43.78 1987-12-27 8.32 8.32 18.16 22.96 26.79 31.56 36.88 41.48 1987-12-28 8.12 8.12 20.40 23.77 26.72 30.31 37.29 40.64 1987-12-29 7.69 7.69 20.46 23.12 26.33 31.58 37.98 39.17 1987-12-30 7.27 7.27 20.73 24.01 27.06 30.16 37.84 47.39 1987-12-31 6.93 6.93 19.93 24.32 26.29 32.02 37.40 55.74 1988-01-01 7.04 7.04 19.53 23.94 26.78 31.48 35.91 53.07 1988-01-02 7.40 7.40 18.12 23.84 26.33 31.16 34.87 51.53 1988-01-03 7.98 6.66 18.04 23.50 26.77 31.55 36.15 49.92 1988-01-04 8.39 8.39 20.07 23.73 25.81 31.73 34.36 48.68 1988-01-05 8.59 6.04 18.99 23.13 27.59 30.93 32.80 48.72 1988-01-06 8.68 6.67 17.14 22.14 27.23 30.12 37.03 49.18 1988-01-07 9.53 6.84 15.47 21.41 25.92 30.77 37.14 47.96 1988-01-08 10.29 7.71 14.31 20.70 25.90 30.35 36.80 52.75 1988-01-09 11.29 7.88 13.02 20.70 25.87 30.01 35.79 52.15 1988-01-10 12.62 7.63 14.07 20.83 25.37 29.45 36.49 55.81 1988-01-11 14.43 7.08 15.35 20.50 24.77 30.28 37.52 54.24 1988-01-12 15.53 6.40 16.17 20.71 24.51 30.46 35.98 53.92 1988-01-13 16.91 5.24 17.02 21.85 24.72 30.71 36.41 52.87 1988-01-14 17.81 5.05 17.40 21.17 25.16 32.33 36.45 51.74 1988-01-15 18.68 4.59 17.15 21.20 24.72 31.90 38.26 50.51 1988-01-16 19.13 3.90 17.00 19.56 24.29 31.92 42.32 51.24 1988-01-17 19.11 3.71 16.57 19.96 25.22 31.35 41.78 54.45 1988-01-18 18.88 3.57 16.10 20.42 24.52 32.03 40.95 52.61 1988-01-19 19.03 3.40 16.35 20.77 24.43 30.48 43.92 50.40 1988-01-20 22.02 3.38 15.88 21.16 24.37 32.09 43.93 49.56 1988-01-21 22.78 3.38 16.32 21.22 23.83 32.67 43.38 55.43 1988-01-22 26.38 3.54 16.19 20.21 24.38 29.07 42.50 53.77 1988-01-23 26.45 3.71 15.76 20.96 23.35 28.54 41.15 52.10 1988-01-24 26.62 3.86 16.32 20.99 22.43 28.04 40.70 51.32 1988-01-25 23.40 4.00 16.10 20.69 22.47 26.60 40.14 50.49 1988-01-26 22.21 4.14 14.82 19.43 21.37 27.76 38.96 49.70 1988-01-27 19.40 4.07 13.74 18.88 20.70 28.47 37.19 49.20 1988-01-28 22.82 3.85 12.10 18.58 20.36 27.09 35.94 48.97 1988-01-29 23.73 6.86 11.45 18.52 20.71 28.52 37.34 56.24 1988-01-30 25.60 8.24 11.55 18.36 20.66 26.60 37.44 50.31 1988-01-31 33.43 8.08 11.35 17.88 20.37 29.58 36.04 47.65 1988-02-01 39.98 7.50 11.35 17.66 19.57 29.06 38.76 46.81 1988-02-02 43.88 7.16 11.06 17.12 19.35 26.47 38.58 46.42 1988-02-03 50.67 5.85 11.01 17.01 18.75 25.83 37.49 50.67 1988-02-04 55.83 9.43 14.52 17.01 19.07 27.65 37.00 55.83 1988-02-05 55.43 4.66 12.07 17.00 18.75 25.48 35.34 55.43 1988-02-06 54.69 7.81 11.61 17.24 18.93 24.46 34.58 54.69 1988-02-07 52.90 8.55 11.57 16.97 18.67 25.38 33.76 52.90 1988-02-08 45.76 8.24 12.13 17.00 18.43 25.75 32.90 45.76 1988-02-09 43.71 7.80 11.87 16.60 18.49 25.44 32.27 43.71 1988-02-10 37.47 7.72 11.98 16.16 18.41 24.72 29.44 40.49 1988-02-11 31.79 7.48 12.39 15.97 18.36 23.62 29.02 39.52 1988-02-12 32.11 6.95 11.61 13.80 18.20 23.82 28.66 38.68 1988-02-13 32.10 6.61 10.50 14.44 18.07 21.89 28.30 37.91 1988-02-14 32.70 6.36 9.86 15.33 17.72 21.92 31.39 36.94 1988-02-15 37.16 7.18 11.36 15.01 17.79 22.23 31.48 37.16 1988-02-16 41.73 6.54 9.51 14.95 17.97 22.12 31.37 41.73 1988-02-17 41.43 1.84 8.91 14.48 17.82 21.27 31.08 41.85 1988-02-18 46.21 1.84 7.07 14.04 17.73 21.20 28.99 46.21 1988-02-19 46.15 2.46 9.35 14.79 17.96 22.32 27.30 46.15 1988-02-20 45.88 2.53 9.11 14.89 18.02 21.44 25.45 45.88 1988-02-21 45.71 2.72 8.62 15.51 17.89 20.81 25.08 45.71 1988-02-22 45.31 3.05 9.24 15.24 17.71 20.65 25.48 45.31 1988-02-23 44.61 3.27 8.23 15.10 17.29 20.04 25.74 44.61 1988-02-24 43.79 3.63 9.14 14.81 16.97 20.74 26.64 43.79 1988-02-25 42.61 4.12 10.66 14.72 16.51 20.56 26.31 42.61 1988-02-26 41.11 4.62 10.24 14.23 16.26 20.88 25.95 46.08 1988-02-27 39.83 5.11 8.68 14.14 16.94 21.71 25.90 42.73 1988-02-28 38.38 5.46 8.99 13.84 17.22 20.93 26.63 40.59 1988-02-29 36.54 14.83 16.97 19.66 22.55 24.07 31.12 36.54 1988-03-01 33.28 5.34 10.08 13.28 17.55 20.62 24.54 41.25 1988-03-02 30.20 6.90 10.25 12.96 17.14 19.90 24.86 40.59 1988-03-03 27.00 1.11 7.79 12.77 16.24 18.73 26.49 40.04 1988-03-04 24.01 1.08 6.94 12.47 14.76 18.78 23.98 38.65 1988-03-05 21.91 1.11 7.12 12.15 16.14 18.82 24.21 48.23 1988-03-06 21.10 1.03 6.78 11.47 15.17 18.75 24.68 51.67 1988-03-07 20.32 0.97 7.17 11.85 16.43 19.54 25.94 56.56 1988-03-08 19.23 2.91 6.67 11.50 15.62 19.23 25.47 53.78 1988-03-09 18.41 3.55 6.57 10.96 15.28 19.34 25.52 50.34 1988-03-10 16.90 3.54 6.80 10.56 15.39 19.10 25.66 42.52 1988-03-11 15.94 4.23 7.16 11.56 15.94 18.94 26.92 53.35 1988-03-12 13.91 4.84 7.02 11.06 16.54 19.09 26.28 53.15 1988-03-13 11.65 4.98 7.34 10.99 16.11 18.73 26.11 53.22 1988-03-14 10.39 5.12 8.25 11.40 16.28 18.57 25.98 53.50 1988-03-15 8.92 3.21 7.54 10.61 16.29 18.47 24.72 54.45 1988-03-16 -9999.0 3.21 6.88 11.00 17.11 19.31 27.56 52.81 1988-03-17 -9999.0 3.21 6.96 10.61 15.13 18.65 26.24 54.51 1988-03-18 -9999.0 5.74 9.51 11.93 15.82 17.97 24.03 48.37 1988-03-19 -9999.0 5.94 8.81 11.72 14.20 18.62 27.31 43.67 1988-03-20 -9999.0 5.35 8.54 11.78 14.25 18.01 28.06 39.39 1988-03-21 -9999.0 5.35 8.20 10.40 13.31 18.41 27.53 41.10 1988-03-22 -9999.0 6.30 8.85 11.08 12.66 18.41 28.53 37.29 1988-03-23 -9999.0 6.35 8.73 11.18 13.11 18.06 29.92 35.61 1988-03-24 0.96 0.96 8.57 11.55 15.43 17.75 30.22 35.80 1988-03-25 1.36 1.36 7.44 11.29 13.12 18.58 32.86 38.44 1988-03-26 1.58 1.58 7.04 11.15 13.81 18.47 32.47 39.95 1988-03-27 2.04 2.04 6.97 10.72 13.44 19.04 32.40 45.33 1988-03-28 2.47 2.47 6.67 10.41 13.73 17.76 28.50 50.02 1988-03-29 2.53 2.53 7.01 10.52 14.33 17.93 26.69 54.70 1988-03-30 2.48 2.48 6.22 9.45 14.01 17.64 26.08 53.07 1988-03-31 2.43 2.43 6.21 8.70 14.39 18.15 26.02 50.98 1988-04-01 2.35 2.35 6.33 8.39 14.21 18.06 25.57 48.64 1988-04-02 2.32 2.32 6.14 7.68 14.10 18.38 25.58 41.52 1988-04-03 2.25 2.25 5.27 8.70 13.80 17.55 24.60 35.71 1988-04-04 -9999.0 4.09 6.37 10.39 14.04 17.31 26.83 35.02 1988-04-05 -9999.0 2.63 5.57 8.98 13.35 17.24 25.44 34.72 1988-04-06 -9999.0 4.38 6.36 9.94 14.39 17.55 25.14 34.56 1988-04-07 -9999.0 4.06 7.11 10.04 15.76 17.86 25.90 33.97 1988-04-08 -9999.0 4.66 7.57 9.83 14.42 17.40 28.95 33.99 1988-04-09 -9999.0 7.76 8.06 11.83 17.48 25.22 29.96 33.93 1988-04-10 -9999.0 7.88 8.39 9.90 15.12 19.62 28.82 34.45 1988-04-11 -9999.0 7.94 8.73 12.17 17.64 20.73 28.31 34.39 1988-04-12 -9999.0 8.04 8.79 14.75 18.93 22.91 28.45 34.94 1988-04-13 -9999.0 7.99 8.94 13.90 19.62 21.77 24.71 26.00 1988-04-14 -9999.0 3.95 6.78 14.16 21.58 23.34 24.07 25.45 1988-04-15 -9999.0 13.63 16.53 21.15 22.18 24.36 25.55 25.97 1988-04-16 -9999.0 13.77 15.74 19.70 22.75 25.30 26.24 26.70 1988-04-17 -9999.0 13.90 15.52 18.19 19.15 24.03 26.35 27.08 1988-04-18 -9999.0 13.92 15.19 17.32 18.18 23.76 26.70 27.74 1988-04-19 -9999.0 16.03 16.69 18.00 21.70 25.41 26.79 27.47 1988-04-20 -9999.0 18.08 19.33 21.83 24.33 25.54 26.75 27.36 1988-04-21 -9999.0 18.38 19.37 21.35 23.34 24.73 26.12 26.82 1988-04-22 -9999.0 22.74 23.14 23.93 24.73 25.53 26.33 26.73 1988-04-23 -9999.0 22.23 22.64 23.46 24.27 25.09 25.91 26.32 1988-04-24 -9999.0 21.38 21.84 22.76 23.68 24.61 25.53 25.99 1988-04-25 -9999.0 21.48 21.92 22.81 23.70 24.59 25.48 25.92 1988-04-26 -9999.0 21.76 22.21 23.12 24.02 24.93 25.83 26.29 1988-04-27 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1988-04-28 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1988-04-29 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00 1988-04-30 -9999.0 -9999.00-9999.00-9999.00-9999.00-9999.00-9999.00-9999.00