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 1.46 in, 25 mi WSW of Pueblo, Colorado · to Wed 18Z
Wettest 2.72 in, 25 mi S of Santa Clara, Cuba · to Thu 00Z
Wettest 5.53 in, 25 mi E of Escuinapa, Mexico · to Thu 06Z
Wettest 5.53 in, 25 mi E of Escuinapa, Mexico · to Thu 12Z
Wettest 5.53 in, 25 mi E of Escuinapa, Mexico · to Thu 18Z
Wettest 5.53 in, 25 mi E of Escuinapa, Mexico · to Fri 00Z
Wettest 6.89 in, 45 mi WSW of Reynosa, Mexico · to Fri 06Z
Wettest 7.19 in, 25 mi ENE of Laredo, Texas · to Fri 12Z
Wettest 7.40 in near Montemorelos, Mexico · to Fri 18Z
Wettest 7.92 in near Montemorelos, Mexico · to Sat 00Z
Wettest 9.67 in near Ciudad Valles, Mexico · to Sat 06Z
Wettest 9.75 in at 20.1N 112.35W · to Sat 12Z
Wettest 13.14 in at 20.1N 112.5W · to Sat 18Z
Wettest 14.41 in at 20.1N 112.5W · to Sun 00Z
Wettest 15.12 in at 20.1N 112.65W · to Sun 06Z
Wettest 15.75 in at 20.1N 112.65W · to Sun 12Z
Wettest 15.83 in at 20.1N 112.65W · to Sun 18Z
Wettest 15.83 in at 20.1N 112.65W · to Mon 00Z
Wettest 15.84 in at 20.1N 112.65W · to Mon 06Z
Wettest 15.84 in at 20.1N 112.65W · to Mon 12Z
Wettest 15.98 in at 20.1N 112.65W · to Mon 18Z
Wettest 15.99 in at 20.1N 112.65W · to Tue 00Z
Wettest 15.99 in at 20.1N 112.65W · to Tue 06Z
Wettest 15.99 in at 20.1N 112.65W · to Tue 12Z
Wettest 15.99 in at 20.1N 112.65W · to Tue 18Z
Wettest 15.99 in at 20.1N 112.65W · to Wed 00Z
Wettest 15.99 in at 20.1N 112.65W · to Wed 06Z
Wettest 16.01 in at 20.1N 112.65W · to Wed 12Z
Wettest 16.04 in at 20.1N 112.65W · to Wed 18Z
Wettest 16.04 in at 20.1N 112.65W · to Thu 00Z
Wettest 16.04 in at 20.1N 112.65W · to Thu 06Z
Wettest 16.04 in at 20.1N 112.65W · to Thu 12Z
Wettest 16.04 in at 20.1N 112.65W · to Thu 18Z
Wettest 16.34 in, 45 mi SW of Cozumel, Mexico · to Fri 00Z
Wettest 16.81 in at 25.05N 87.6W · to Fri 06Z
Wettest 19.91 in at 25.95N 86.25W · to Fri 12Z
Wettest 24.88 in at 25.95N 85.95W · to Fri 18Z
Wettest 31.23 in at 25.5N 86.85W · to Sat 00Z
Wettest 37.13 in at 25.65N 86.85W · to Sat 06Z
Wettest 49.03 in 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.