Name: NH Vortex Area Units: million km!U2!N Level: 600 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 20.44 7.69 13.51 20.40 25.79 30.36 40.41 53.54 0 2025-10-02 20.90 8.29 13.47 20.28 25.31 27.67 39.97 52.86 0 2025-10-03 21.28 8.31 14.12 19.01 24.74 27.82 40.45 51.34 0 2025-10-04 21.91 8.51 14.28 18.43 23.92 26.86 39.39 49.69 0 2025-10-05 22.55 9.17 14.38 17.73 23.21 25.97 37.90 49.72 0 2025-10-06 23.15 8.78 12.65 16.82 22.51 26.09 35.58 46.23 0 2025-10-07 23.52 8.26 13.26 16.49 22.32 26.20 34.62 46.95 0 2025-10-08 23.98 9.09 12.48 17.08 22.10 26.14 31.63 45.14 0 2025-10-09 23.87 10.60 13.34 16.79 22.12 26.64 30.12 45.85 0 2025-10-10 21.20 10.45 12.87 16.47 21.93 25.40 31.37 44.26 0 2025-10-11 19.01 10.16 12.60 17.26 21.37 24.17 30.62 40.25 0 2025-10-12 16.92 9.03 11.96 16.83 20.36 22.84 28.86 39.65 0 2025-10-13 15.33 8.54 11.55 15.89 19.50 22.22 26.92 39.37 0 2025-10-14 14.49 8.99 11.30 15.37 18.86 21.36 26.24 39.06 0 2025-10-15 15.27 4.42 11.19 14.94 18.50 20.81 26.08 38.61 0 2025-10-16 16.22 4.53 11.44 14.07 18.64 21.66 26.31 38.96 0 2025-10-17 17.36 4.85 11.16 14.68 18.61 21.54 26.58 38.89 0 2025-10-18 18.32 4.95 11.73 15.23 18.62 20.58 26.60 38.45 0 2025-10-19 18.96 6.59 11.70 14.96 18.66 21.04 26.60 36.00 0 2025-10-20 19.74 7.95 11.55 15.66 18.60 21.40 26.02 33.83 0 2025-10-21 20.71 6.16 10.93 14.64 18.55 21.38 25.64 31.46 0 2025-10-22 21.43 6.84 12.24 15.84 18.88 20.94 26.09 30.63 0 2025-10-23 18.76 5.65 12.90 16.07 19.01 20.76 25.92 30.54 0 2025-10-24 19.56 5.57 12.92 16.13 19.16 21.47 25.93 30.52 0 2025-10-25 20.36 5.79 13.01 16.59 19.42 22.11 26.30 31.75 0 2025-10-26 17.26 6.30 13.17 16.70 19.48 21.99 27.02 30.15 0 2025-10-27 14.12 10.22 12.81 16.76 19.32 21.19 26.31 29.89 0 2025-10-28 14.17 9.59 13.99 16.86 19.41 21.70 26.11 29.73 6 2025-10-29 15.01 9.89 14.16 17.41 19.38 21.31 25.92 29.03 12 2025-10-30 14.57 10.19 12.30 17.18 19.12 21.36 24.88 28.20 36 2025-10-31 19.56 10.03 12.42 16.89 19.14 22.00 24.57 27.80 60 2025-11-01 23.17 9.99 12.94 17.38 19.15 21.63 25.16 27.56 84 2025-11-02 26.29 10.34 13.11 16.81 19.00 21.44 25.19 28.61 108 2025-11-03 25.06 10.45 13.47 16.66 18.73 20.21 25.04 28.66 132 2025-11-04 25.20 11.31 13.41 16.65 18.81 21.06 24.62 28.48 156 2025-11-05 23.28 11.50 13.52 16.21 18.76 21.38 24.13 28.62 180 2025-11-06 22.82 10.95 14.50 16.32 18.80 20.68 24.36 26.83 204 2025-11-07 22.80 10.68 13.92 16.64 18.77 20.93 23.81 28.49 228 2025-11-08 -9999.0 10.25 13.58 16.91 18.68 20.89 23.63 27.89 -1 2025-11-09 -9999.0 10.00 14.03 16.48 18.83 20.70 24.15 31.94 -1 2025-11-10 -9999.0 9.66 14.17 16.53 19.01 20.64 24.33 33.05 -1 2025-11-11 -9999.0 9.99 14.48 16.78 19.01 20.80 24.19 33.76 -1 2025-11-12 -9999.0 10.21 14.06 16.97 19.15 20.97 23.90 33.96 -1 2025-11-13 -9999.0 10.27 14.18 16.89 19.35 21.29 24.81 32.98 -1 2025-11-14 -9999.0 10.19 14.23 16.45 19.33 20.71 26.09 30.10 -1 2025-11-15 -9999.0 9.94 14.62 16.58 19.45 20.89 26.55 30.36 -1 2025-11-16 -9999.0 9.96 14.44 16.91 19.61 20.80 26.41 30.41 -1 2025-11-17 -9999.0 9.74 13.87 17.48 19.83 21.25 26.13 30.03 -1 2025-11-18 -9999.0 9.87 14.21 18.13 20.38 22.01 27.39 29.54 -1 2025-11-19 -9999.0 9.78 14.46 17.54 20.35 21.94 27.48 27.83 -1 2025-11-20 -9999.0 9.87 15.56 17.71 20.49 23.27 26.78 28.45 -1 2025-11-21 -9999.0 9.82 15.37 18.61 20.55 22.99 26.49 27.58 -1 2025-11-22 -9999.0 9.81 15.99 18.64 20.65 23.31 25.87 27.65 -1 2025-11-23 -9999.0 9.34 15.94 18.39 20.55 23.08 25.74 27.86 -1 2025-11-24 -9999.0 9.12 15.31 17.69 20.37 23.17 25.73 29.13 -1 2025-11-25 -9999.0 9.08 15.35 17.77 20.15 23.17 25.35 29.11 -1 2025-11-26 -9999.0 8.97 15.53 18.30 20.34 22.73 25.34 29.08 -1 2025-11-27 -9999.0 8.92 15.52 17.51 20.22 23.01 25.36 29.34 -1 2025-11-28 -9999.0 8.77 15.09 17.28 20.23 23.34 25.52 29.19 -1 2025-11-29 -9999.0 10.75 15.60 17.28 20.27 23.39 25.62 28.96 -1 2025-11-30 -9999.0 10.99 15.88 17.91 20.91 23.85 26.71 31.05 -1 2025-12-01 -9999.0 11.19 15.90 17.92 20.89 23.28 26.77 34.26 -1 2025-12-02 -9999.0 11.33 15.14 17.80 20.86 23.30 26.77 34.09 -1 2025-12-03 -9999.0 11.28 15.33 17.95 21.15 23.44 28.23 33.27 -1 2025-12-04 -9999.0 13.61 15.26 18.12 21.05 22.72 27.56 39.47 -1 2025-12-05 -9999.0 13.34 15.31 18.56 21.03 22.56 27.44 36.23 -1 2025-12-06 -9999.0 14.26 15.33 18.12 21.16 22.70 26.40 37.48 -1 2025-12-07 -9999.0 14.02 16.08 19.63 21.53 22.84 27.01 38.16 -1 2025-12-08 -9999.0 13.18 15.91 19.92 21.46 22.73 27.72 32.11 -1 2025-12-09 -9999.0 12.76 16.02 20.08 21.45 22.98 27.64 30.13 -1 2025-12-10 -9999.0 12.18 15.88 19.93 21.24 22.78 26.87 30.52 -1 2025-12-11 -9999.0 11.73 16.44 19.35 20.95 22.78 25.35 29.38 -1 2025-12-12 -9999.0 11.01 16.48 19.13 20.84 22.94 25.55 27.36 -1 2025-12-13 -9999.0 9.05 16.57 19.10 21.02 22.88 25.63 32.54 -1 2025-12-14 -9999.0 7.12 16.46 18.86 20.79 23.21 25.25 26.40 -1 2025-12-15 -9999.0 6.76 16.49 18.69 20.82 23.17 25.49 27.94 -1 2025-12-16 -9999.0 6.38 16.50 19.01 21.15 23.66 25.49 30.81 -1 2025-12-17 -9999.0 6.22 16.23 19.13 21.11 23.71 25.67 33.27 -1 2025-12-18 -9999.0 6.20 16.30 19.36 21.22 23.78 25.78 32.74 -1 2025-12-19 -9999.0 6.30 17.12 19.61 21.53 23.78 26.69 32.90 -1 2025-12-20 -9999.0 5.74 18.30 20.35 21.98 24.25 27.06 34.06 -1 2025-12-21 -9999.0 5.13 17.30 20.40 22.23 24.73 27.68 33.61 -1 2025-12-22 -9999.0 4.56 17.60 20.53 22.65 24.85 29.20 38.45 -1 2025-12-23 -9999.0 4.61 17.46 20.53 22.79 24.82 29.51 44.87 -1 2025-12-24 -9999.0 4.27 18.35 20.08 23.22 25.04 29.64 49.54 -1 2025-12-25 -9999.0 4.55 18.28 20.36 23.38 24.82 30.44 50.15 -1 2025-12-26 -9999.0 5.03 18.16 20.79 23.28 25.34 29.97 49.98 -1 2025-12-27 -9999.0 5.80 18.39 20.37 23.39 25.72 30.43 49.74 -1 2025-12-28 -9999.0 6.21 18.51 20.21 23.51 25.16 30.95 49.33 -1 2025-12-29 -9999.0 7.15 16.95 20.13 23.43 25.33 31.01 49.03 -1 2025-12-30 -9999.0 7.84 16.73 20.24 23.40 25.30 30.76 47.94 -1 2025-12-31 -9999.0 8.59 17.79 20.54 23.55 25.67 30.79 46.77 -1 2026-01-01 -9999.0 8.91 17.52 21.34 23.73 25.68 30.57 45.52 -1 2026-01-02 -9999.0 8.24 17.45 20.86 23.73 26.28 29.94 44.98 -1 2026-01-03 -9999.0 7.77 18.41 21.11 23.51 25.79 29.77 44.46 -1 2026-01-04 -9999.0 7.31 18.33 20.34 23.41 26.27 30.06 44.82 -1 2026-01-05 -9999.0 7.10 18.51 20.66 23.23 25.65 29.68 44.76 -1 2026-01-06 -9999.0 7.03 17.71 20.66 23.06 25.40 29.57 44.24 -1 2026-01-07 -9999.0 7.26 16.97 20.45 22.87 25.58 28.95 44.30 -1 2026-01-08 -9999.0 7.00 16.75 20.93 22.91 24.85 29.02 43.64 -1 2026-01-09 -9999.0 7.68 16.56 20.53 22.70 24.87 28.96 43.14 -1 2026-01-10 -9999.0 8.94 15.98 20.18 22.81 25.24 28.78 42.53 -1 2026-01-11 -9999.0 8.95 16.05 20.53 22.95 25.49 28.93 42.14 -1 2026-01-12 -9999.0 9.13 16.10 20.53 23.03 26.18 28.93 40.99 -1 2026-01-13 -9999.0 9.73 16.70 20.56 23.14 25.62 29.82 40.36 -1 2026-01-14 -9999.0 10.47 15.97 20.44 23.09 25.47 30.32 39.88 -1 2026-01-15 -9999.0 10.24 16.16 20.06 22.88 25.96 29.59 39.60 -1 2026-01-16 -9999.0 9.78 15.89 19.69 22.56 25.76 29.32 39.45 -1 2026-01-17 -9999.0 7.59 16.37 19.71 22.62 25.60 29.14 39.55 -1 2026-01-18 -9999.0 7.98 16.60 19.29 22.51 25.57 29.23 39.09 -1 2026-01-19 -9999.0 6.51 16.62 20.63 22.80 25.37 28.79 38.14 -1 2026-01-20 -9999.0 6.72 16.43 20.89 22.78 25.68 28.53 37.25 -1 2026-01-21 -9999.0 5.30 16.62 20.66 22.80 25.39 28.62 36.44 -1 2026-01-22 -9999.0 5.52 16.52 21.09 22.53 24.94 27.95 35.60 -1 2026-01-23 -9999.0 5.41 15.56 21.36 22.44 24.80 28.36 36.69 -1 2026-01-24 -9999.0 5.10 14.93 20.32 22.19 24.44 28.80 36.51 -1 2026-01-25 -9999.0 6.69 13.32 20.50 22.19 24.63 29.69 36.49 -1 2026-01-26 -9999.0 6.61 12.71 19.98 22.01 24.40 29.88 35.15 -1 2026-01-27 -9999.0 6.48 12.12 20.19 21.89 24.62 28.97 36.63 -1 2026-01-28 -9999.0 6.05 12.11 19.83 21.64 24.84 29.27 36.06 -1 2026-01-29 -9999.0 5.25 12.03 19.61 21.46 24.80 29.15 35.82 -1 2026-01-30 -9999.0 4.71 11.75 19.75 21.26 24.88 27.96 34.97 -1 2026-01-31 -9999.0 3.91 11.69 19.78 21.00 23.82 27.99 34.28 -1 2026-02-01 -9999.0 4.12 11.85 19.25 20.84 23.62 27.17 33.78 -1 2026-02-02 -9999.0 4.36 12.28 18.82 20.76 23.61 27.44 33.03 -1 2026-02-03 -9999.0 4.59 12.11 18.85 20.60 23.44 27.70 32.84 -1 2026-02-04 -9999.0 4.73 11.74 18.55 20.58 23.16 27.56 33.51 -1 2026-02-05 -9999.0 4.78 13.88 18.55 20.80 23.10 28.34 33.72 -1 2026-02-06 -9999.0 4.80 12.99 18.09 20.90 23.77 28.13 34.74 -1 2026-02-07 -9999.0 4.70 12.94 18.23 20.96 24.00 29.17 35.30 -1 2026-02-08 -9999.0 4.49 12.98 17.91 21.11 23.79 28.20 41.33 -1 2026-02-09 -9999.0 4.37 12.96 18.12 21.16 24.56 28.23 47.45 -1 2026-02-10 -9999.0 4.37 13.03 16.98 20.82 24.28 27.97 43.95 -1 2026-02-11 -9999.0 4.28 13.06 16.98 20.67 24.14 27.66 41.71 -1 2026-02-12 -9999.0 4.27 12.90 16.85 20.50 23.87 27.41 41.76 -1 2026-02-13 -9999.0 4.30 11.64 16.62 20.31 23.99 27.26 42.89 -1 2026-02-14 -9999.0 4.12 10.80 16.79 20.05 22.43 27.92 45.88 -1 2026-02-15 -9999.0 3.81 11.35 16.52 20.03 22.38 27.85 48.92 -1 2026-02-16 -9999.0 3.54 11.56 16.89 20.01 22.31 27.50 52.06 -1 2026-02-17 -9999.0 2.96 12.09 15.91 19.85 22.44 27.55 51.95 -1 2026-02-18 -9999.0 2.05 10.51 15.71 19.79 22.72 27.71 52.87 -1 2026-02-19 -9999.0 1.33 8.85 15.41 19.60 22.93 27.83 51.60 -1 2026-02-20 -9999.0 1.38 8.88 14.81 19.26 22.90 28.21 50.07 -1 2026-02-21 -9999.0 1.41 9.07 14.00 18.91 22.71 28.00 48.44 -1 2026-02-22 -9999.0 1.35 8.35 13.65 18.60 22.55 27.96 47.75 -1 2026-02-23 -9999.0 1.20 7.21 13.40 18.22 22.18 27.93 46.50 -1 2026-02-24 -9999.0 1.04 6.62 13.30 17.85 21.83 27.87 44.17 -1 2026-02-25 -9999.0 0.86 6.15 12.96 17.58 21.03 26.87 42.76 -1 2026-02-26 -9999.0 1.73 7.97 12.86 17.71 21.09 27.01 42.63 -1 2026-02-27 -9999.0 1.71 8.99 13.19 17.83 21.19 26.64 41.99 -1 2026-02-28 -9999.0 1.71 8.19 13.63 17.71 21.10 26.61 40.43 -1 2026-03-01 -9999.0 1.70 7.96 13.58 17.56 20.86 26.02 41.03 -1 2026-03-02 -9999.0 1.80 8.03 13.29 17.51 21.18 26.03 39.56 -1 2026-03-03 -9999.0 1.77 6.53 13.27 16.99 21.05 25.82 36.09 -1 2026-03-04 -9999.0 1.79 5.90 12.90 16.65 20.90 25.82 35.35 -1 2026-03-05 -9999.0 1.81 5.79 12.81 16.34 20.98 24.51 34.88 -1 2026-03-06 -9999.0 4.17 6.42 12.75 16.32 20.32 24.67 34.20 -1 2026-03-07 -9999.0 3.98 6.53 12.39 16.26 20.09 24.73 33.72 -1 2026-03-08 -9999.0 4.31 6.54 12.64 16.11 20.03 24.05 33.70 -1 2026-03-09 -9999.0 4.36 6.37 12.97 15.88 19.67 23.60 33.77 -1 2026-03-10 -9999.0 4.23 5.59 12.46 15.71 19.06 23.45 33.51 -1 2026-03-11 -9999.0 4.25 5.44 11.94 15.50 18.91 24.23 34.25 -1 2026-03-12 -9999.0 4.25 5.35 11.18 15.02 18.31 23.92 33.36 -1 2026-03-13 -9999.0 4.25 5.79 10.87 15.01 17.81 23.81 37.10 -1 2026-03-14 -9999.0 4.22 5.51 10.74 14.90 17.60 23.53 35.23 -1 2026-03-15 -9999.0 4.22 5.62 10.81 14.67 17.19 23.13 33.49 -1 2026-03-16 -9999.0 4.05 5.63 11.53 14.70 17.26 22.20 33.41 -1 2026-03-17 -9999.0 4.09 5.43 11.67 14.71 17.04 21.95 36.09 -1 2026-03-18 -9999.0 3.61 5.41 11.46 14.65 17.61 22.13 35.81 -1 2026-03-19 -9999.0 3.56 5.26 11.71 14.62 16.90 22.31 35.42 -1 2026-03-20 -9999.0 3.38 5.17 11.40 14.56 16.83 22.96 35.13 -1 2026-03-21 -9999.0 3.09 5.28 10.53 14.08 16.13 22.85 35.35 -1 2026-03-22 -9999.0 2.71 5.49 10.52 13.70 15.80 21.83 35.53 -1 2026-03-23 -9999.0 2.50 5.52 9.44 13.07 14.92 20.41 34.93 -1 2026-03-24 -9999.0 1.60 5.32 10.42 12.82 13.98 20.12 34.15 -1 2026-03-25 -9999.0 1.88 5.41 9.94 12.81 14.15 19.51 34.16 -1 2026-03-26 -9999.0 1.79 5.91 9.40 13.14 14.08 23.18 34.81 -1 2026-03-27 -9999.0 1.58 5.82 10.04 13.48 14.47 23.76 34.84 -1 2026-03-28 -9999.0 1.77 5.19 9.76 14.04 14.33 23.89 45.40 -1 2026-03-29 -9999.0 1.59 5.40 9.42 14.06 15.40 25.99 54.98 -1 2026-03-30 -9999.0 1.37 5.45 9.32 13.83 15.77 23.49 54.13 -1 2026-03-31 -9999.0 1.49 5.58 8.63 13.31 14.77 21.56 52.00 -1 2026-04-01 -9999.0 1.10 5.51 8.13 13.04 14.91 21.54 51.06 -1 2026-04-02 -9999.0 2.42 4.62 7.71 12.67 14.18 21.13 49.60 -1 2026-04-03 -9999.0 2.35 4.63 7.50 12.58 14.43 21.27 48.16 -1 2026-04-04 -9999.0 2.38 5.55 7.31 12.54 14.73 21.34 45.47 -1 2026-04-05 -9999.0 2.41 5.33 8.21 12.67 14.34 21.26 44.30 -1 2026-04-06 -9999.0 2.16 4.87 8.05 12.68 14.46 22.46 44.63 -1 2026-04-07 -9999.0 1.97 4.62 8.32 12.73 15.04 23.61 44.62 -1 2026-04-08 -9999.0 1.95 4.29 7.73 12.73 15.51 22.85 45.54 -1 2026-04-09 -9999.0 1.99 4.09 7.14 12.68 15.19 22.74 46.83 -1 2026-04-10 -9999.0 1.90 3.66 6.63 12.80 15.44 23.89 47.80 -1 2026-04-11 -9999.0 1.35 4.03 7.83 13.07 16.15 24.32 46.67 -1 2026-04-12 -9999.0 1.34 3.99 7.71 13.43 16.37 24.64 45.88 -1 2026-04-13 -9999.0 1.32 3.87 7.17 13.11 16.41 24.72 44.69 -1 2026-04-14 -9999.0 1.29 3.82 7.39 13.71 16.37 25.79 43.89 -1 2026-04-15 -9999.0 1.25 3.21 6.65 13.94 16.14 26.81 50.72 -1 2026-04-16 -9999.0 1.24 3.43 6.70 13.96 15.75 30.56 48.92 -1 2026-04-17 -9999.0 1.24 3.05 5.91 13.83 14.87 30.37 44.38 -1 2026-04-18 -9999.0 1.24 3.20 6.15 13.30 14.76 28.29 45.48 -1 2026-04-19 -9999.0 1.20 2.89 6.11 12.86 14.26 27.98 45.89 -1 2026-04-20 -9999.0 1.21 2.61 6.40 12.70 14.70 26.36 46.41 -1 2026-04-21 -9999.0 1.13 2.32 5.86 12.27 14.99 24.54 45.28 -1 2026-04-22 -9999.0 1.10 2.39 6.00 11.62 12.57 23.68 46.35 -1 2026-04-23 -9999.0 1.06 2.62 5.84 11.54 14.29 22.23 39.59 -1 2026-04-24 -9999.0 0.73 2.66 5.69 10.85 11.93 21.60 36.54 -1 2026-04-25 -9999.0 0.42 2.45 5.99 10.46 11.86 21.84 32.66 -1 2026-04-26 -9999.0 0.28 1.71 5.65 10.54 11.00 23.75 32.90 -1 2026-04-27 -9999.0 0.29 1.48 5.49 9.71 10.41 20.71 34.99 -1 2026-04-28 -9999.0 0.28 1.52 4.70 9.58 10.66 20.29 36.65 -1 2026-04-29 -9999.0 0.27 1.65 5.02 9.54 11.14 19.69 38.08 -1 2026-04-30 -9999.0 0.35 2.00 4.94 9.24 12.23 19.40 39.12 -1