Region Lower 48
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 153 mm, 65 km NE of Tecuala, Mexico · Fri 12Z to Sat 12Z
Wettest 153 mm, 65 km NE of Tecuala, Mexico · Fri 18Z to Sat 18Z
Wettest 147 mm, 65 km NE of Tecuala, Mexico · Sat 00Z to Sun 00Z
Wettest 174 mm near Slidell, Louisiana · Sat 06Z to Sun 06Z
Wettest 186 mm near Slidell, Louisiana · Sat 12Z to Sun 12Z
Wettest 190 mm near Slidell, Louisiana · Sat 18Z to Sun 18Z
Wettest 180 mm, 90 km SE of Port Lavaca, Texas · Sun 00Z to Mon 00Z
Wettest 184 mm, 90 km SE of Port Lavaca, Texas · Sun 06Z to Mon 06Z
Wettest 171 mm, 90 km SE of Port Lavaca, Texas · Sun 12Z to Mon 12Z
Wettest 175 mm, 45 km SE of Ciudad Madero, Mexico · Sun 18Z to Mon 18Z
Wettest 287 mm, 45 km SE of Ciudad Madero, Mexico · Mon 00Z to Tue 00Z
Wettest 303 mm, 45 km SE of Ciudad Madero, Mexico · Mon 06Z to Tue 06Z
Wettest 249 mm, 30 km SSE of Aldama, Mexico · Mon 12Z to Tue 12Z
Wettest 183 mm, 45 km SE of Ciudad Madero, Mexico · Mon 18Z to Tue 18Z
Wettest 150 mm at 31.2N 77.4W · Tue 00Z to Wed 00Z
Wettest 129 mm, 290 km SE of Myrtle Beach, South Carolina · Tue 06Z to Wed 06Z
Wettest 125 mm, 225 km E of Brunswick, Georgia · Tue 12Z to Wed 12Z
Wettest 142 mm at 20.1N 122.55W · Tue 18Z to Wed 18Z
Wettest 136 mm at 20.1N 122.55W · Wed 00Z to Thu 00Z
Wettest 217 mm at 20.1N 125.25W · Wed 06Z to Thu 06Z
Wettest 275 mm at 20.1N 125.25W · Wed 12Z to Thu 12Z
Wettest 269 mm at 20.1N 125.25W · Wed 18Z to Thu 18Z
Wettest 214 mm at 20.4N 126.45W · Thu 00Z to Fri 00Z
Wettest 200 mm at 20.7N 129.15W · Thu 06Z to Fri 06Z
Wettest 232 mm at 20.85N 129.3W · Thu 12Z to Fri 12Z
Wettest 235 mm at 20.85N 129.3W · Thu 18Z to Fri 18Z
Wettest 214 mm at 20.85N 129.3W · Fri 00Z to Sat 00Z
Wettest 166 mm near Cape Coral, Florida · Fri 06Z to Sat 06Z
Wettest 166 mm near Cape Coral, Florida · Fri 12Z to Sat 12Z
Wettest 192 mm at 25.2N 94.35W · Fri 18Z to Sat 18Z
Wettest 222 mm at 25.5N 93.75W · Sat 00Z to Sun 00Z
Wettest 229 mm, 270 km E of Brownsville, Texas · Sat 06Z to Sun 06Z
Wettest 321 mm, 135 km E of Brownsville, Texas · Sat 12Z to Sun 12Z
Wettest 395 mm, 270 km E of Brownsville, Texas · Sat 18Z to Sun 18Z
Wettest 374 mm, 290 km ENE of Brownsville, Texas · Sun 00Z to Mon 00Z
Wettest 256 mm, 290 km ENE of Brownsville, Texas · Sun 06Z to Mon 06Z
Wettest 206 mm at 26.7N 93.45W · 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.