Name: NH Vortex Area Units: million km!U2!N Level: 850 K Source: MERRA2 (Data starting 2025-09-01 are from GEOS FP) Missing: -9999.0 Climatology: 1978/1979 to 2024/2025 Date Data Minimum 10% 30% Mean 70% 90% Maximum Fcst 2025-10-01 31.08 10.70 18.29 26.40 28.91 32.22 37.21 43.82 0 2025-10-02 30.61 9.09 20.12 26.75 28.90 31.41 36.58 45.22 0 2025-10-03 30.42 9.77 21.09 26.97 28.82 31.53 37.56 44.60 0 2025-10-04 30.36 8.95 21.07 25.06 28.19 31.49 38.06 43.79 0 2025-10-05 30.48 7.24 19.75 24.88 27.68 31.14 37.30 43.49 0 2025-10-06 30.89 6.30 18.51 23.42 27.30 30.74 37.20 43.04 0 2025-10-07 31.03 4.84 16.93 21.75 26.83 30.59 39.15 43.20 0 2025-10-08 31.09 6.16 16.81 21.37 26.36 30.57 40.13 43.24 0 2025-10-09 30.66 9.39 17.00 22.14 26.81 29.72 39.05 44.54 0 2025-10-10 30.24 9.59 18.00 22.95 27.41 30.28 38.91 49.29 0 2025-10-11 29.67 9.72 19.05 22.53 27.70 30.73 39.76 49.38 0 2025-10-12 29.22 9.90 19.97 23.20 28.07 30.94 40.90 49.01 0 2025-10-13 28.75 10.86 18.77 23.46 28.20 31.96 40.25 49.80 0 2025-10-14 28.66 12.93 18.33 23.27 27.84 31.55 39.42 47.50 0 2025-10-15 28.59 11.52 18.34 22.75 27.36 31.93 37.51 46.44 0 2025-10-16 28.18 13.76 18.28 22.42 27.22 31.69 36.80 45.63 0 2025-10-17 28.05 11.78 18.65 22.99 27.01 30.48 37.91 45.09 0 2025-10-18 28.02 11.58 18.21 22.67 27.20 30.01 39.84 44.56 0 2025-10-19 28.21 8.56 17.79 22.02 27.06 30.26 39.87 44.04 0 2025-10-20 27.73 8.35 17.93 22.64 26.74 30.38 37.75 43.45 0 2025-10-21 27.92 9.77 17.79 21.28 26.22 29.31 37.66 43.23 0 2025-10-22 27.78 15.18 18.14 21.31 26.21 30.72 36.05 42.86 0 2025-10-23 27.64 14.80 17.76 21.17 25.99 30.48 36.18 42.53 0 2025-10-24 27.60 14.92 18.21 21.45 25.89 28.23 36.70 42.13 0 2025-10-25 28.63 10.14 18.08 21.83 25.47 28.49 35.90 41.56 0 2025-10-26 27.72 10.32 18.02 21.82 25.43 28.79 34.55 40.46 0 2025-10-27 29.28 8.64 17.59 20.64 25.12 29.24 35.62 39.88 0 2025-10-28 30.49 7.52 17.47 20.58 24.74 27.16 34.43 39.69 6 2025-10-29 29.86 4.34 17.84 20.12 24.49 28.61 34.11 39.36 12 2025-10-30 28.58 4.36 16.80 19.91 24.73 28.79 35.25 40.11 36 2025-10-31 29.26 7.79 16.41 20.23 24.78 28.16 34.90 40.63 60 2025-11-01 27.35 9.06 16.07 20.20 24.48 28.11 34.03 40.68 84 2025-11-02 26.90 10.48 16.23 19.82 24.43 27.21 34.96 40.73 108 2025-11-03 28.04 13.83 15.95 21.05 24.43 26.67 34.22 41.18 132 2025-11-04 27.41 13.52 16.64 20.78 24.53 27.10 33.71 40.03 156 2025-11-05 26.41 13.14 15.91 20.39 24.25 26.95 33.63 40.24 180 2025-11-06 25.54 12.26 15.34 19.90 23.97 26.75 31.60 36.37 204 2025-11-07 23.52 10.99 17.38 20.13 24.27 26.91 32.41 36.67 228 2025-11-08 -9999.0 14.48 17.14 19.97 24.25 26.87 33.09 37.04 -1 2025-11-09 -9999.0 16.43 18.03 20.15 24.76 27.62 32.97 36.90 -1 2025-11-10 -9999.0 15.56 18.03 20.99 25.18 28.70 32.75 37.77 -1 2025-11-11 -9999.0 16.22 18.53 21.41 25.70 28.68 33.83 40.33 -1 2025-11-12 -9999.0 14.14 18.45 22.20 25.77 29.20 34.01 39.10 -1 2025-11-13 -9999.0 14.53 18.50 21.99 25.55 27.90 33.98 39.34 -1 2025-11-14 -9999.0 12.87 18.51 21.97 24.80 26.94 32.29 37.42 -1 2025-11-15 -9999.0 12.76 18.96 21.38 24.39 25.53 31.81 37.30 -1 2025-11-16 -9999.0 12.54 19.72 21.43 24.58 26.20 32.06 39.45 -1 2025-11-17 -9999.0 12.56 18.96 21.75 24.43 26.94 32.08 46.61 -1 2025-11-18 -9999.0 12.40 18.72 21.92 24.78 26.10 32.58 52.82 -1 2025-11-19 -9999.0 12.79 17.88 22.04 25.00 26.50 32.60 51.73 -1 2025-11-20 -9999.0 13.17 18.55 21.01 25.26 27.38 32.10 56.54 -1 2025-11-21 -9999.0 12.67 18.41 20.97 25.29 26.89 32.04 54.94 -1 2025-11-22 -9999.0 12.53 18.15 20.39 25.36 27.18 32.62 53.08 -1 2025-11-23 -9999.0 12.40 17.52 21.52 25.32 27.36 32.92 51.46 -1 2025-11-24 -9999.0 13.78 17.06 21.21 25.78 28.88 33.56 50.21 -1 2025-11-25 -9999.0 13.77 17.81 22.86 26.24 29.23 33.80 45.78 -1 2025-11-26 -9999.0 14.16 17.88 22.77 26.31 29.02 35.28 43.42 -1 2025-11-27 -9999.0 14.51 18.08 22.82 26.66 29.17 36.13 47.53 -1 2025-11-28 -9999.0 14.58 18.47 23.61 27.25 29.24 36.37 53.45 -1 2025-11-29 -9999.0 12.78 18.49 23.49 27.40 29.60 37.19 58.69 -1 2025-11-30 -9999.0 12.13 18.31 23.78 27.15 28.78 35.90 58.69 -1 2025-12-01 -9999.0 11.89 18.49 23.15 27.22 29.29 37.09 58.37 -1 2025-12-02 -9999.0 12.25 18.15 22.44 27.08 28.65 36.65 58.22 -1 2025-12-03 -9999.0 12.11 17.83 21.97 26.75 28.89 36.99 58.49 -1 2025-12-04 -9999.0 12.36 18.32 21.86 26.61 29.58 38.50 51.00 -1 2025-12-05 -9999.0 12.16 17.61 22.24 26.96 28.71 38.30 49.17 -1 2025-12-06 -9999.0 11.36 18.07 22.35 27.03 28.50 40.56 48.68 -1 2025-12-07 -9999.0 10.16 17.95 21.63 27.35 28.56 43.11 51.14 -1 2025-12-08 -9999.0 9.95 17.37 22.64 27.67 29.07 43.41 57.81 -1 2025-12-09 -9999.0 9.67 17.08 22.42 27.67 28.69 45.53 57.72 -1 2025-12-10 -9999.0 11.73 17.65 22.62 27.69 28.61 45.93 57.23 -1 2025-12-11 -9999.0 12.07 18.36 22.76 27.75 28.54 44.59 56.80 -1 2025-12-12 -9999.0 11.88 18.57 22.68 28.10 29.12 43.69 56.41 -1 2025-12-13 -9999.0 11.11 19.04 24.07 28.62 28.93 42.77 55.64 -1 2025-12-14 -9999.0 9.60 18.61 24.23 28.85 30.53 44.02 55.19 -1 2025-12-15 -9999.0 7.90 17.82 24.41 28.95 30.71 41.94 55.48 -1 2025-12-16 -9999.0 6.88 17.01 25.31 29.15 30.82 41.91 54.60 -1 2025-12-17 -9999.0 7.02 16.81 25.05 28.65 30.99 42.44 53.14 -1 2025-12-18 -9999.0 5.07 17.43 24.36 28.18 30.54 43.73 52.33 -1 2025-12-19 -9999.0 5.77 18.51 24.24 28.14 31.32 42.62 51.55 -1 2025-12-20 -9999.0 6.25 20.12 23.70 28.23 31.78 40.51 53.06 -1 2025-12-21 -9999.0 6.36 20.26 24.04 28.21 32.46 39.87 54.43 -1 2025-12-22 -9999.0 5.12 20.19 24.93 28.37 31.74 38.99 54.86 -1 2025-12-23 -9999.0 3.93 20.16 24.48 28.42 32.32 37.57 56.09 -1 2025-12-24 -9999.0 2.41 18.87 24.58 28.50 33.15 39.45 55.84 -1 2025-12-25 -9999.0 4.59 19.13 24.30 28.60 33.31 40.78 54.99 -1 2025-12-26 -9999.0 5.09 18.67 23.96 28.49 33.01 39.94 54.56 -1 2025-12-27 -9999.0 5.76 19.42 23.03 28.71 33.34 39.85 55.35 -1 2025-12-28 -9999.0 7.14 20.15 23.67 28.58 32.20 40.15 54.88 -1 2025-12-29 -9999.0 6.45 20.24 24.11 28.50 31.23 38.78 55.78 -1 2025-12-30 -9999.0 5.65 20.50 24.84 28.75 31.28 41.38 58.43 -1 2025-12-31 -9999.0 5.42 19.22 24.66 29.14 31.35 43.77 58.41 -1 2026-01-01 -9999.0 5.89 18.68 24.76 29.00 31.10 42.59 58.22 -1 2026-01-02 -9999.0 4.65 18.76 24.51 29.08 32.54 45.86 57.54 -1 2026-01-03 -9999.0 4.85 18.04 24.22 28.95 31.33 49.74 57.73 -1 2026-01-04 -9999.0 4.35 16.87 23.07 28.23 30.72 45.39 57.31 -1 2026-01-05 -9999.0 5.14 16.60 23.02 28.00 30.75 43.88 56.01 -1 2026-01-06 -9999.0 5.27 15.54 22.50 27.77 30.29 44.70 54.84 -1 2026-01-07 -9999.0 6.52 15.80 21.76 27.65 29.82 45.61 55.10 -1 2026-01-08 -9999.0 7.53 16.57 21.33 27.73 31.59 43.13 54.73 -1 2026-01-09 -9999.0 10.62 17.00 21.95 27.96 31.45 42.64 55.31 -1 2026-01-10 -9999.0 10.48 16.88 21.68 27.70 31.71 41.82 55.87 -1 2026-01-11 -9999.0 9.48 17.36 21.59 27.48 31.48 40.56 54.79 -1 2026-01-12 -9999.0 8.14 17.32 21.90 27.26 30.34 39.92 54.36 -1 2026-01-13 -9999.0 6.43 16.05 23.31 27.29 31.81 39.12 53.00 -1 2026-01-14 -9999.0 4.39 15.82 22.69 26.98 30.77 39.26 51.94 -1 2026-01-15 -9999.0 4.35 14.36 21.75 26.82 31.16 39.36 50.98 -1 2026-01-16 -9999.0 3.91 15.50 22.05 26.82 31.25 38.46 49.93 -1 2026-01-17 -9999.0 3.59 14.60 21.02 26.78 31.01 40.00 50.81 -1 2026-01-18 -9999.0 3.57 14.76 21.10 26.32 30.58 38.16 50.44 -1 2026-01-19 -9999.0 3.42 14.31 21.18 26.12 30.70 36.89 50.08 -1 2026-01-20 -9999.0 3.28 14.51 21.10 25.86 30.27 37.14 45.34 -1 2026-01-21 -9999.0 3.32 14.68 21.11 25.75 29.90 37.52 49.75 -1 2026-01-22 -9999.0 3.37 14.36 20.52 25.57 30.50 38.16 48.86 -1 2026-01-23 -9999.0 3.54 14.55 20.24 25.16 30.89 35.66 47.42 -1 2026-01-24 -9999.0 3.82 14.13 20.24 24.85 29.34 34.17 52.27 -1 2026-01-25 -9999.0 4.13 13.80 19.77 24.64 28.24 34.02 51.54 -1 2026-01-26 -9999.0 4.20 12.63 19.49 24.15 28.59 34.68 50.82 -1 2026-01-27 -9999.0 4.31 11.75 19.50 23.72 28.54 34.93 50.01 -1 2026-01-28 -9999.0 3.56 11.36 19.04 23.51 28.17 35.33 49.94 -1 2026-01-29 -9999.0 4.08 11.18 18.39 23.24 27.68 35.15 54.92 -1 2026-01-30 -9999.0 4.49 11.52 17.11 22.78 26.95 34.33 55.49 -1 2026-01-31 -9999.0 7.21 10.65 16.27 22.66 27.19 36.27 56.33 -1 2026-02-01 -9999.0 8.01 10.86 15.51 22.32 26.42 36.43 54.62 -1 2026-02-02 -9999.0 7.88 11.34 16.42 22.39 24.80 35.55 54.90 -1 2026-02-03 -9999.0 6.74 11.26 15.72 22.24 25.08 34.50 51.62 -1 2026-02-04 -9999.0 5.64 11.19 15.12 22.39 27.50 34.89 55.51 -1 2026-02-05 -9999.0 4.91 11.90 15.28 22.35 26.49 33.62 55.59 -1 2026-02-06 -9999.0 4.10 11.64 16.04 22.30 26.73 32.66 55.23 -1 2026-02-07 -9999.0 3.90 11.57 15.87 21.66 24.73 34.98 50.68 -1 2026-02-08 -9999.0 3.76 11.24 15.78 21.10 24.98 32.38 49.14 -1 2026-02-09 -9999.0 3.59 10.52 15.10 20.45 23.80 31.71 45.82 -1 2026-02-10 -9999.0 2.99 9.92 14.75 19.76 24.69 30.07 40.85 -1 2026-02-11 -9999.0 6.62 11.61 13.77 19.49 22.67 29.87 40.22 -1 2026-02-12 -9999.0 6.93 11.91 14.52 19.64 22.08 29.76 43.65 -1 2026-02-13 -9999.0 6.04 12.06 15.73 20.07 22.33 31.05 44.62 -1 2026-02-14 -9999.0 5.04 12.71 15.93 20.61 22.11 32.52 45.09 -1 2026-02-15 -9999.0 3.98 12.47 15.92 20.81 23.79 35.38 42.82 -1 2026-02-16 -9999.0 2.28 12.21 15.80 21.05 25.00 33.95 47.62 -1 2026-02-17 -9999.0 1.45 11.94 15.12 20.90 25.39 33.56 48.92 -1 2026-02-18 -9999.0 1.67 11.99 14.39 20.35 24.99 31.80 47.49 -1 2026-02-19 -9999.0 2.14 10.65 14.51 19.78 22.63 31.28 46.57 -1 2026-02-20 -9999.0 2.19 9.31 14.25 19.45 22.27 29.47 52.07 -1 2026-02-21 -9999.0 1.95 8.65 13.90 18.95 21.76 28.14 46.50 -1 2026-02-22 -9999.0 2.95 9.65 13.94 18.97 22.13 29.51 46.79 -1 2026-02-23 -9999.0 3.36 9.65 14.54 19.51 22.86 30.45 49.64 -1 2026-02-24 -9999.0 3.59 8.45 14.14 19.81 22.85 32.81 49.34 -1 2026-02-25 -9999.0 4.08 8.89 14.04 20.12 23.86 33.68 52.56 -1 2026-02-26 -9999.0 4.51 7.52 14.23 20.42 23.76 38.31 55.34 -1 2026-02-27 -9999.0 5.00 7.53 14.14 20.31 23.31 39.21 55.63 -1 2026-02-28 -9999.0 4.54 7.97 13.64 19.65 22.84 37.14 53.59 -1 2026-03-01 -9999.0 2.21 7.47 12.73 18.78 22.73 29.69 55.23 -1 2026-03-02 -9999.0 1.59 6.45 13.05 18.24 21.62 27.62 57.32 -1 2026-03-03 -9999.0 1.69 6.36 12.97 18.15 21.70 27.19 55.66 -1 2026-03-04 -9999.0 0.87 6.21 12.73 17.91 20.80 26.56 52.83 -1 2026-03-05 -9999.0 1.46 6.19 12.51 17.69 20.87 28.18 50.22 -1 2026-03-06 -9999.0 1.96 6.46 12.06 17.47 20.68 28.47 48.96 -1 2026-03-07 -9999.0 2.67 6.36 11.30 17.31 20.25 29.56 45.28 -1 2026-03-08 -9999.0 3.35 6.00 11.00 16.70 19.31 25.93 42.36 -1 2026-03-09 -9999.0 3.82 6.96 10.92 16.79 19.12 25.67 45.81 -1 2026-03-10 -9999.0 3.30 7.50 11.45 17.16 19.60 25.63 46.24 -1 2026-03-11 -9999.0 4.77 7.62 11.60 17.97 20.59 30.55 48.32 -1 2026-03-12 -9999.0 4.66 7.09 11.65 18.66 20.59 33.12 52.93 -1 2026-03-13 -9999.0 4.62 7.04 11.43 19.11 20.29 34.39 53.33 -1 2026-03-14 -9999.0 3.53 6.78 10.57 19.35 21.52 39.37 54.31 -1 2026-03-15 -9999.0 4.28 6.49 10.30 19.04 20.95 37.00 55.10 -1 2026-03-16 -9999.0 3.06 6.82 10.63 18.40 20.86 32.36 53.87 -1 2026-03-17 -9999.0 4.10 5.54 10.74 18.33 20.40 31.21 53.96 -1 2026-03-18 -9999.0 4.19 6.65 11.01 18.11 20.59 30.94 53.48 -1 2026-03-19 -9999.0 3.16 8.24 11.81 18.05 20.66 31.13 50.77 -1 2026-03-20 -9999.0 1.96 7.93 11.34 18.30 20.94 33.56 50.11 -1 2026-03-21 -9999.0 2.12 7.56 10.96 18.43 21.65 32.54 48.49 -1 2026-03-22 -9999.0 2.17 7.05 11.02 17.96 20.15 32.37 48.51 -1 2026-03-23 -9999.0 2.20 7.21 10.94 17.94 19.68 35.43 48.95 -1 2026-03-24 -9999.0 2.21 7.27 10.83 17.73 17.99 35.83 48.82 -1 2026-03-25 -9999.0 0.99 6.85 10.69 17.71 19.11 37.86 48.57 -1 2026-03-26 -9999.0 1.57 6.59 11.06 17.79 19.43 37.52 48.45 -1 2026-03-27 -9999.0 1.61 6.73 11.51 18.17 21.45 36.02 48.85 -1 2026-03-28 -9999.0 1.37 6.95 10.77 18.09 20.79 36.23 52.59 -1 2026-03-29 -9999.0 1.74 5.57 10.75 17.87 21.54 34.46 53.37 -1 2026-03-30 -9999.0 1.94 5.85 10.27 17.56 20.94 34.05 51.97 -1 2026-03-31 -9999.0 1.73 5.38 9.94 17.22 20.71 34.91 48.02 -1 2026-04-01 -9999.0 1.94 5.33 8.93 16.46 19.25 32.78 46.17 -1 2026-04-02 -9999.0 1.84 4.96 8.19 16.02 18.46 33.81 41.39 -1 2026-04-03 -9999.0 1.87 5.10 9.93 16.15 18.26 35.36 44.17 -1 2026-04-04 -9999.0 1.86 4.83 10.58 16.50 18.88 34.83 47.88 -1 2026-04-05 -9999.0 1.80 5.59 10.75 17.15 18.73 35.01 50.30 -1 2026-04-06 -9999.0 2.62 5.59 11.36 18.16 19.95 33.63 54.15 -1 2026-04-07 -9999.0 2.63 5.26 11.33 18.83 24.05 33.83 57.45 -1 2026-04-08 -9999.0 2.51 6.81 11.00 19.05 24.63 34.08 51.78 -1 2026-04-09 -9999.0 0.79 4.90 12.43 19.23 24.97 33.00 53.77 -1 2026-04-10 -9999.0 0.75 4.48 12.03 19.18 25.62 33.38 57.51 -1 2026-04-11 -9999.0 0.69 4.52 11.16 18.75 26.16 32.25 56.17 -1 2026-04-12 -9999.0 0.67 4.99 9.87 18.54 25.26 33.24 55.21 -1 2026-04-13 -9999.0 0.60 5.24 10.11 18.79 24.25 32.72 54.15 -1 2026-04-14 -9999.0 0.53 4.97 9.01 18.30 23.27 32.53 52.34 -1 2026-04-15 -9999.0 0.52 4.61 8.97 18.09 24.34 34.33 53.23 -1 2026-04-16 -9999.0 0.52 4.65 8.58 17.42 19.97 33.19 53.68 -1 2026-04-17 -9999.0 0.52 5.15 7.92 17.74 22.46 33.39 51.44 -1 2026-04-18 -9999.0 0.47 4.27 7.76 16.77 23.22 33.29 52.09 -1 2026-04-19 -9999.0 2.39 4.53 7.98 16.86 23.21 31.86 50.76 -1 2026-04-20 -9999.0 2.43 4.15 9.22 16.77 22.46 30.62 48.14 -1 2026-04-21 -9999.0 2.43 5.01 9.40 17.72 23.44 31.27 47.12 -1 2026-04-22 -9999.0 2.31 4.96 9.56 17.20 21.50 33.42 47.20 -1 2026-04-23 -9999.0 1.29 4.94 8.72 17.10 23.12 32.78 43.15 -1 2026-04-24 -9999.0 1.96 6.72 9.27 17.30 22.58 31.98 47.91 -1 2026-04-25 -9999.0 1.53 5.37 8.47 17.04 22.67 35.50 47.56 -1 2026-04-26 -9999.0 1.46 4.27 8.13 16.91 21.04 34.60 47.11 -1 2026-04-27 -9999.0 0.69 3.32 7.75 16.93 24.13 33.57 45.26 -1 2026-04-28 -9999.0 0.66 3.57 7.69 16.98 23.24 34.69 43.06 -1 2026-04-29 -9999.0 0.52 3.84 6.86 16.89 23.11 33.64 47.29 -1 2026-04-30 -9999.0 0.56 3.49 5.85 15.84 21.30 31.75 45.84 -1