Region Lower 48
The readings under the map are for the whole map, not only the part shown.
GEM · Run 12Z 30 Sep · +6 h · Valid Wed 18Z 30 Sep
Wettest 37 mm, 40 km WSW of Pueblo, Colorado · to Wed 18Z
Wettest 69 mm, 40 km S of Santa Clara, Cuba · to Thu 00Z
Wettest 140 mm, 35 km E of Escuinapa, Mexico · to Thu 06Z
Wettest 140 mm, 35 km E of Escuinapa, Mexico · to Thu 12Z
Wettest 140 mm, 35 km E of Escuinapa, Mexico · to Thu 18Z
Wettest 140 mm, 35 km E of Escuinapa, Mexico · to Fri 00Z
Wettest 175 mm, 70 km WSW of Reynosa, Mexico · to Fri 06Z
Wettest 183 mm, 35 km ENE of Laredo, Texas · to Fri 12Z
Wettest 188 mm near Montemorelos, Mexico · to Fri 18Z
Wettest 201 mm near Montemorelos, Mexico · to Sat 00Z
Wettest 246 mm near Ciudad Valles, Mexico · to Sat 06Z
Wettest 248 mm at 20.1N 112.35W · to Sat 12Z
Wettest 334 mm at 20.1N 112.5W · to Sat 18Z
Wettest 366 mm at 20.1N 112.5W · to Sun 00Z
Wettest 384 mm at 20.1N 112.65W · to Sun 06Z
Wettest 400 mm at 20.1N 112.65W · to Sun 12Z
Wettest 402 mm at 20.1N 112.65W · to Sun 18Z
Wettest 402 mm at 20.1N 112.65W · to Mon 00Z
Wettest 402 mm at 20.1N 112.65W · to Mon 06Z
Wettest 402 mm at 20.1N 112.65W · to Mon 12Z
Wettest 406 mm at 20.1N 112.65W · to Mon 18Z
Wettest 406 mm at 20.1N 112.65W · to Tue 00Z
Wettest 406 mm at 20.1N 112.65W · to Tue 06Z
Wettest 406 mm at 20.1N 112.65W · to Tue 12Z
Wettest 406 mm at 20.1N 112.65W · to Tue 18Z
Wettest 406 mm at 20.1N 112.65W · to Wed 00Z
Wettest 406 mm at 20.1N 112.65W · to Wed 06Z
Wettest 407 mm at 20.1N 112.65W · to Wed 12Z
Wettest 407 mm at 20.1N 112.65W · to Wed 18Z
Wettest 407 mm at 20.1N 112.65W · to Thu 00Z
Wettest 407 mm at 20.1N 112.65W · to Thu 06Z
Wettest 407 mm at 20.1N 112.65W · to Thu 12Z
Wettest 407 mm at 20.1N 112.65W · to Thu 18Z
Wettest 415 mm, 70 km SW of Cozumel, Mexico · to Fri 00Z
Wettest 427 mm at 25.05N 87.6W · to Fri 06Z
Wettest 506 mm at 25.95N 86.25W · to Fri 12Z
Wettest 632 mm at 25.95N 85.95W · to Fri 18Z
Wettest 793 mm at 25.5N 86.85W · to Sat 00Z
Wettest 943 mm at 25.65N 86.85W · to Sat 06Z
Wettest 1245 mm at 25.8N 86.85W · to Sat 12Z
One GEM run, issued 12Z 30 Sep — 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.
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.