Region Lower 48
The readings under the map are for the whole map, not only the part shown.
GEM · Run 12Z 30 Sep · +24 h · Valid Thu 12Z 1 Oct
Wettest 5.53 in, 25 mi E of Escuinapa, Mexico · Wed 12Z to Thu 12Z
Wettest 5.53 in, 25 mi E of Escuinapa, Mexico · Wed 18Z to Thu 18Z
Wettest 4.91 in near Brownwood, Texas · Thu 00Z to Fri 00Z
Wettest 6.89 in, 45 mi WSW of Reynosa, Mexico · Thu 06Z to Fri 06Z
Wettest 7.18 in, 25 mi ENE of Laredo, Texas · Thu 12Z to Fri 12Z
Wettest 7.40 in near Montemorelos, Mexico · Thu 18Z to Fri 18Z
Wettest 7.42 in near Montemorelos, Mexico · Fri 00Z to Sat 00Z
Wettest 8.88 in near Ciudad Valles, Mexico · Fri 06Z to Sat 06Z
Wettest 8.84 in at 20.1N 112.5W · Fri 12Z to Sat 12Z
Wettest 12.00 in at 20.1N 112.5W · Fri 18Z to Sat 18Z
Wettest 12.79 in at 20.1N 112.65W · Sat 00Z to Sun 00Z
Wettest 12.94 in at 20.1N 112.65W · Sat 06Z to Sun 06Z
Wettest 8.51 in at 20.1N 112.65W · Sat 12Z to Sun 12Z
Wettest 7.03 in, 40 mi NW of Halachó, Mexico · Sat 18Z to Sun 18Z
Wettest 7.00 in at 21.0N 114.6W · Sun 00Z to Mon 00Z
Wettest 6.92 in, 135 mi SSW of New Iberia, Louisiana · Sun 06Z to Mon 06Z
Wettest 6.84 in, 135 mi SSW of New Iberia, Louisiana · Sun 12Z to Mon 12Z
Wettest 6.50 in, 35 mi W of San Fernando, Mexico · Sun 18Z to Mon 18Z
Wettest 7.26 in, 60 mi SSE of San Fernando, Mexico · Mon 00Z to Tue 00Z
Wettest 7.53 in, 60 mi SSE of San Fernando, Mexico · Mon 06Z to Tue 06Z
Wettest 7.58 in, 30 mi ENE of Poza Rica de Hidalgo, Mexico · Mon 12Z to Tue 12Z
Wettest 8.07 in, 30 mi ENE of Poza Rica de Hidalgo, Mexico · Mon 18Z to Tue 18Z
Wettest 6.37 in, 30 mi ENE of Poza Rica de Hidalgo, Mexico · Tue 00Z to Wed 00Z
Wettest 4.82 in, 40 mi NE of Nautla, Mexico · Tue 06Z to Wed 06Z
Wettest 4.94 in, 135 mi E of Grand Turk, Turks and Caicos Islands · Tue 12Z to Wed 12Z
Wettest 5.66 in, 60 mi SE of Prince Rupert, British Columbia · Tue 18Z to Wed 18Z
Wettest 6.84 in at 27.0N 86.85W · Wed 00Z to Thu 00Z
Wettest 7.89 in, 75 mi SSE of Prince Rupert, British Columbia · Wed 06Z to Thu 06Z
Wettest 7.74 in at 20.1N 127.05W · Wed 12Z to Thu 12Z
Wettest 7.83 in at 20.1N 127.05W · Wed 18Z to Thu 18Z
Wettest 8.32 in at 25.05N 87.6W · Thu 00Z to Fri 00Z
Wettest 12.09 in at 25.5N 87.0W · Thu 06Z to Fri 06Z
Wettest 13.69 in at 25.65N 86.85W · Thu 12Z to Fri 12Z
Wettest 17.84 in at 25.8N 86.1W · Thu 18Z to Fri 18Z
Wettest 22.17 in at 25.8N 86.1W · Fri 00Z to Sat 00Z
Wettest 22.78 in at 25.65N 86.85W · Fri 06Z to Sat 06Z
Wettest 32.57 in at 25.8N 86.85W · Fri 12Z to Sat 12Z
One GEM run, issued 12Z 30 Sep — 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.
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.