Region Lower 48
United States
Europe
The readings under the map are for the whole map, not only the part shown.
GEM · Run 12Z 1 Oct · +24 h · Valid Fri 12Z 2 Oct
Wettest 263 mm, 85 km WNW of Reynosa, Mexico · Thu 12Z to Fri 12Z
Wettest 265 mm, 85 km WNW of Reynosa, Mexico · Thu 18Z to Fri 18Z
Wettest 262 mm, 85 km WNW of Reynosa, Mexico · Fri 00Z to Sat 00Z
Wettest 210 mm near Beeville, Texas · Fri 06Z to Sat 06Z
Wettest 150 mm, 45 km NNW of Ciudad Valles, Mexico · Fri 12Z to Sat 12Z
Wettest 165 mm at 25.2N 69.0W · Fri 18Z to Sat 18Z
Wettest 150 mm at 20.25N 112.95W · Sat 00Z to Sun 00Z
Wettest 177 mm, 60 km ESE of Galveston, Texas · Sat 06Z to Sun 06Z
Wettest 178 mm, 60 km ESE of Galveston, Texas · Sat 12Z to Sun 12Z
Wettest 195 mm at 20.55N 114.0W · Sat 18Z to Sun 18Z
Wettest 197 mm at 20.55N 114.0W · Sun 00Z to Mon 00Z
Wettest 200 mm, 65 km E of Nautla, Mexico · Sun 06Z to Mon 06Z
Wettest 189 mm, 65 km E of Nautla, Mexico · Sun 12Z to Mon 12Z
Wettest 182 mm, 55 km N of Tuxpam, Mexico · Sun 18Z to Mon 18Z
Wettest 191 mm, 55 km N of Tuxpam, Mexico · Mon 00Z to Tue 00Z
Wettest 193 mm, 55 km N of Tuxpam, Mexico · Mon 06Z to Tue 06Z
Wettest 170 mm, 65 km NE of Tuxpam, Mexico · Mon 12Z to Tue 12Z
Wettest 181 mm, 30 km NE of Poza Rica de Hidalgo, Mexico · Mon 18Z to Tue 18Z
Wettest 185 mm, 30 km NE of Poza Rica de Hidalgo, Mexico · Tue 00Z to Wed 00Z
Wettest 179 mm near Poza Rica de Hidalgo, Mexico · Tue 06Z to Wed 06Z
Wettest 160 mm, 30 km NNW of Campeche, Mexico · Tue 12Z to Wed 12Z
Wettest 160 mm, 30 km NNW of Campeche, Mexico · Tue 18Z to Wed 18Z
Wettest 155 mm, 85 km NNW of Bella Bella, British Columbia · Wed 00Z to Thu 00Z
Wettest 158 mm, 85 km NNW of Bella Bella, British Columbia · Wed 06Z to Thu 06Z
Wettest 154 mm, 40 km NNW of Bella Bella, British Columbia · Wed 12Z to Thu 12Z
Wettest 191 mm at 25.65N 91.05W · Wed 18Z to Thu 18Z
Wettest 228 mm at 25.35N 90.6W · Thu 00Z to Fri 00Z
Wettest 200 mm at 25.35N 90.6W · Thu 06Z to Fri 06Z
Wettest 188 mm at 25.35N 90.6W · Thu 12Z to Fri 12Z
Wettest 282 mm at 26.85N 93.3W · Thu 18Z to Fri 18Z
Wettest 308 mm at 27.0N 92.7W · Fri 00Z to Sat 00Z
Wettest 391 mm, 280 km SSW of Houma, Louisiana · Fri 06Z to Sat 06Z
Wettest 394 mm, 280 km SSW of Houma, Louisiana · Fri 12Z to Sat 12Z
Wettest 415 mm, 140 km SSW of Houma, Louisiana · Fri 18Z to Sat 18Z
Wettest 425 mm, 140 km SSW of Houma, Louisiana · Sat 00Z to Sun 00Z
Wettest 423 mm, 140 km SSW of Houma, Louisiana · Sat 06Z to Sun 06Z
Wettest 272 mm, 155 km SE of Houma, Louisiana · Sat 12Z to Sun 12Z
One GEM run, issued 12Z 1 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.