Region Lower 48
United States
Europe
The readings under the map are for the whole map, not only the part shown.
GEM · Run 12Z 3 Oct · +24 h · Valid Sun 12Z 4 Oct
Wettest 298 mm near Tekax, Mexico · Sat 12Z to Sun 12Z
Wettest 285 mm near Tekax, Mexico · Sat 18Z to Sun 18Z
Wettest 237 mm at 20.1N 113.55W · Sun 00Z to Mon 00Z
Wettest 241 mm at 20.1N 113.55W · Sun 06Z to Mon 06Z
Wettest 279 mm at 20.1N 113.55W · Sun 12Z to Mon 12Z
Wettest 228 mm at 20.1N 114.0W · Sun 18Z to Mon 18Z
Wettest 149 mm at 20.1N 114.0W · Mon 00Z to Tue 00Z
Wettest 140 mm, 50 km SSW of San Fernando, Mexico · Mon 06Z to Tue 06Z
Wettest 140 mm, 50 km SSW of San Fernando, Mexico · Mon 12Z to Tue 12Z
Wettest 273 mm, 40 km NNE of Ciudad Madero, Mexico · Mon 18Z to Tue 18Z
Wettest 279 mm, 40 km NNE of Ciudad Madero, Mexico · Tue 00Z to Wed 00Z
Wettest 266 mm, 40 km NNE of Ciudad Madero, Mexico · Tue 06Z to Wed 06Z
Wettest 184 mm, 40 km NNE of Ciudad Madero, Mexico · Tue 12Z to Wed 12Z
Wettest 155 mm at 21.6N 121.2W · Tue 18Z to Wed 18Z
Wettest 127 mm at 21.6N 121.8W · Wed 00Z to Thu 00Z
Wettest 152 mm, 75 km NE of Motul, Mexico · Wed 06Z to Thu 06Z
Wettest 152 mm, 75 km NE of Motul, Mexico · Wed 12Z to Thu 12Z
Wettest 152 mm, 75 km NE of Motul, Mexico · Wed 18Z to Thu 18Z
Wettest 152 mm, 40 km SW of Fort Pierce, Florida · Thu 00Z to Fri 00Z
Wettest 157 mm near Prince Rupert, British Columbia · Thu 06Z to Fri 06Z
Wettest 158 mm near Prince Rupert, British Columbia · Thu 12Z to Fri 12Z
Wettest 140 mm, 40 km SW of Fort Pierce, Florida · Thu 18Z to Fri 18Z
Wettest 169 mm, 50 km SE of Corpus Christi, Texas · Fri 00Z to Sat 00Z
Wettest 169 mm, 40 km SSE of Corpus Christi, Texas · Fri 06Z to Sat 06Z
Wettest 194 mm at 21.9N 131.4W · Fri 12Z to Sat 12Z
Wettest 214 mm at 21.9N 131.4W · Fri 18Z to Sat 18Z
Wettest 206 mm at 21.9N 131.4W · Sat 00Z to Sun 00Z
Wettest 188 mm at 22.35N 131.4W · Sat 06Z to Sun 06Z
Wettest 171 mm at 22.35N 131.4W · Sat 12Z to Sun 12Z
Wettest 105 mm at 24.6N 91.8W · Sat 18Z to Sun 18Z
Wettest 102 mm, 45 km WNW of Hattiesburg, Mississippi · Sun 00Z to Mon 00Z
Wettest 161 mm near Laurel, Mississippi · Sun 06Z to Mon 06Z
Wettest 208 mm, 60 km E of Laurel, Mississippi · Sun 12Z to Mon 12Z
Wettest 341 mm, 55 km ENE of Columbus, Georgia · Sun 18Z to Mon 18Z
Wettest 338 mm, 50 km W of Macon, Georgia · Mon 00Z to Tue 00Z
Wettest 299 mm, 50 km W of Macon, Georgia · Mon 06Z to Tue 06Z
Wettest 230 mm, 50 km W of Macon, Georgia · Mon 12Z to Tue 12Z
One GEM run, issued 12Z 3 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.