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 · +6 h · Valid Thu 18Z 1 Oct
Wettest 75 mm, 50 km WNW of Hays, Kansas · to Thu 18Z
Wettest 87 mm near Dodge City, Kansas · to Fri 00Z
Wettest 208 mm, 85 km WNW of Reynosa, Mexico · to Fri 06Z
Wettest 263 mm, 85 km WNW of Reynosa, Mexico · to Fri 12Z
Wettest 265 mm, 85 km WNW of Reynosa, Mexico · to Fri 18Z
Wettest 277 mm, 85 km WNW of Reynosa, Mexico · to Sat 00Z
Wettest 277 mm, 85 km WNW of Reynosa, Mexico · to Sat 06Z
Wettest 286 mm, 85 km WNW of Reynosa, Mexico · to Sat 12Z
Wettest 287 mm, 85 km WNW of Reynosa, Mexico · to Sat 18Z
Wettest 287 mm, 85 km WNW of Reynosa, Mexico · to Sun 00Z
Wettest 288 mm, 85 km WNW of Reynosa, Mexico · to Sun 06Z
Wettest 297 mm, 85 km WNW of Reynosa, Mexico · to Sun 12Z
Wettest 304 mm, 85 km WNW of Reynosa, Mexico · to Sun 18Z
Wettest 314 mm, 40 km E of Montemorelos, Mexico · to Mon 00Z
Wettest 326 mm, 40 km E of Montemorelos, Mexico · to Mon 06Z
Wettest 338 mm, 40 km E of Montemorelos, Mexico · to Mon 12Z
Wettest 350 mm, 40 km E of Montemorelos, Mexico · to Mon 18Z
Wettest 360 mm, 40 km E of Montemorelos, Mexico · to Tue 00Z
Wettest 363 mm, 40 km E of Montemorelos, Mexico · to Tue 06Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Tue 12Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Tue 18Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Wed 00Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Wed 06Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Wed 12Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Wed 18Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Thu 00Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Thu 06Z
Wettest 364 mm, 40 km E of Montemorelos, Mexico · to Thu 12Z
Wettest 372 mm, 85 km E of Tuxpam, Mexico · to Thu 18Z
Wettest 377 mm, 85 km E of Tuxpam, Mexico · to Fri 00Z
Wettest 401 mm, 75 km NNE of Bella Bella, British Columbia · to Fri 06Z
Wettest 425 mm, 75 km NNE of Bella Bella, British Columbia · to Fri 12Z
Wettest 438 mm at 26.85N 93.3W · to Fri 18Z
Wettest 455 mm at 26.85N 93.3W · to Sat 00Z
Wettest 601 mm, 290 km S of Houma, Louisiana · to Sat 06Z
Wettest 627 mm, 290 km S of Houma, Louisiana · to Sat 12Z
Wettest 657 mm, 290 km S of Houma, Louisiana · to Sat 18Z
Wettest 659 mm, 290 km S of Houma, Louisiana · to Sun 00Z
Wettest 661 mm, 290 km S of Houma, Louisiana · to Sun 06Z
Wettest 663 mm, 290 km S of Houma, Louisiana · to Sun 12Z
One GEM run, issued 12Z 1 Oct — played forward 6 hours at a time, from 6 to 240 hours out.
Methodology
Each frame is everything this run puts down from its start to that hour, so the map fills in as the film plays and its last frame is the run's whole total. 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.