Region Europe
United States
Europe
The readings under the map are for the whole map, not only the part shown.
GEM · Run 12Z 2 Oct · +24 h · Valid Sat 12Z 3 Oct
Wettest 115 mm, 160 km E of Ponta Delgada, Portugal · Fri 12Z to Sat 12Z
Wettest 113 mm, 160 km E of Ponta Delgada, Portugal · Fri 18Z to Sat 18Z
Wettest 101 mm, 45 km S of Montpellier, France · Sat 00Z to Sun 00Z
Wettest 97 mm, 90 km ESE of Selfoss, Iceland · Sat 06Z to Sun 06Z
Wettest 93 mm, 95 km ESE of Selfoss, Iceland · Sat 12Z to Sun 12Z
Wettest 80 mm, 105 km NE of Zaragoza, Spain · Sat 18Z to Sun 18Z
Wettest 101 mm, 95 km NW of Leikanger, Norway · Sun 00Z to Mon 00Z
Wettest 105 mm, 95 km NW of Leikanger, Norway · Sun 06Z to Mon 06Z
Wettest 114 mm, 95 km NW of Leikanger, Norway · Sun 12Z to Mon 12Z
Wettest 154 mm, 65 km NE of Haugesund, Norway · Sun 18Z to Mon 18Z
Wettest 146 mm, 65 km NE of Haugesund, Norway · Mon 00Z to Tue 00Z
Wettest 122 mm, 65 km NE of Haugesund, Norway · Mon 06Z to Tue 06Z
Wettest 128 mm, 45 km NW of Mo i Rana, Norway · Mon 12Z to Tue 12Z
Wettest 124 mm, 100 km NE of Rørvik, Norway · Mon 18Z to Tue 18Z
Wettest 134 mm, 45 km ENE of Rørvik, Norway · Tue 00Z to Wed 00Z
Wettest 120 mm, 45 km ENE of Rørvik, Norway · Tue 06Z to Wed 06Z
Wettest 87 mm, 45 km ENE of Rørvik, Norway · Tue 12Z to Wed 12Z
Wettest 68 mm, 60 km S of Marseille, France · Tue 18Z to Wed 18Z
Wettest 78 mm, 75 km SW of Toulon, France · Wed 00Z to Thu 00Z
Wettest 91 mm, 40 km SW of Toulon, France · Wed 06Z to Thu 06Z
Wettest 96 mm, 40 km SW of Toulon, France · Wed 12Z to Thu 12Z
Wettest 91 mm, 70 km NW of Ajaccio, France · Wed 18Z to Thu 18Z
Wettest 89 mm, 70 km NW of Ajaccio, France · Thu 00Z to Fri 00Z
Wettest 81 mm, 80 km NW of Civitavecchia, Italy · Thu 06Z to Fri 06Z
Wettest 104 mm, 55 km ENE of Ísafjörður, Iceland · Thu 12Z to Fri 12Z
Wettest 123 mm, 55 km ENE of Ísafjörður, Iceland · Thu 18Z to Fri 18Z
Wettest 116 mm, 55 km ENE of Ísafjörður, Iceland · Fri 00Z to Sat 00Z
Wettest 90 mm, 40 km NNE of Akureyri, Iceland · Fri 06Z to Sat 06Z
Wettest 81 mm, 90 km NNW of Egilsstaðir, Iceland · Fri 12Z to Sat 12Z
Wettest 77 mm, 40 km NNE of Egilsstaðir, Iceland · Fri 18Z to Sat 18Z
Wettest 70 mm, 120 km ESE of Castello, Spain · Sat 00Z to Sun 00Z
Wettest 136 mm, 120 km ESE of Castello, Spain · Sat 06Z to Sun 06Z
Wettest 112 mm, 120 km ESE of Castello, Spain · Sat 12Z to Sun 12Z
Wettest 109 mm, 110 km ESE of Castello, Spain · Sat 18Z to Sun 18Z
Wettest 83 mm near Palma, Spain · Sun 00Z to Mon 00Z
Wettest 83 mm, 65 km SE of Bergen, Norway · Sun 06Z to Mon 06Z
Wettest 157 mm, 55 km S of Palermo, Italy · Sun 12Z to Mon 12Z
One GEM run, issued 12Z 2 Oct — played forward 6 hours at a time, from 24 to 240 hours out.
Methodology
Each frame is the precipitation this run puts down in the 24 hours to it — its total at that hour less its total 24 hours before — so the film starts at +24 h, the first frame with a whole day behind it. Liquid-equivalent: snow counts as the water it melts to.
The colours are Tropical Tidbits' scale, so a reader who knows theirs can read this one. Three of its steps are re-shaded: at 0.5 in, at 2 in — where, on theirs, a reader with protanopia sees the 1.75–2 in band and the 2–2.5 in band as one colour — and among the yellows above 12 in. Same hues; the lightness is re-spaced so every step is visible in every common form of colour-blindness.
Six-hourly to 240 hours. GEM forecasts out to 240 hours. The frames past the one shown load on demand. Uncorrected model output.
This map is drawn from model output we store ourselves, not from anyone's picture of it, and is based on data and products of Environment and Climate Change Canada. The per-city read of the same day — which cities the models are fighting about, and what the discussion makes of it — is on the national page. Every model's full forecast for any of these cities, or anywhere else, is in the beta: request an invite; it's free during the beta.
Sources and licences
- Environment and Climate Change Canada: GEM, from the MSC Datamart. Data Source: Environment and Climate Change Canada, under its Data Services End-use Licence.
What we change: each field is cropped to the frame these maps share when we download it, and each map then smooths, contours, differences or ranks those numbers as its Methodology says. These are our maps of the providers' numbers, not their products, and none of them has reviewed or endorsed this site.
Coastlines, borders, lakes and place names: Natural Earth, public domain.