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 · +6 h · Valid Fri 18Z 2 Oct
Wettest 3.12 in, 20 mi WSW of Ciudad Valles, Mexico · to Fri 18Z
Wettest 5.40 in near Brunswick, Georgia · to Sat 00Z
Wettest 5.48 in, 35 mi N of Villa Unión, Mexico · to Sat 06Z
Wettest 6.01 in, 40 mi NE of Tecuala, Mexico · to Sat 12Z
Wettest 6.01 in, 40 mi NE of Tecuala, Mexico · to Sat 18Z
Wettest 6.90 in near Palatka, Florida · to Sun 00Z
Wettest 7.03 in near Slidell, Louisiana · to Sun 06Z
Wettest 7.58 in near Slidell, Louisiana · to Sun 12Z
Wettest 8.16 in, 55 mi E of Laurel, Mississippi · to Sun 18Z
Wettest 9.28 in near Slidell, Louisiana · to Mon 00Z
Wettest 9.29 in near Slidell, Louisiana · to Mon 06Z
Wettest 9.30 in near Slidell, Louisiana · to Mon 12Z
Wettest 10.99 in, 30 mi SE of Ciudad Madero, Mexico · to Mon 18Z
Wettest 15.96 in, 30 mi SE of Ciudad Madero, Mexico · to Tue 00Z
Wettest 17.18 in, 30 mi SE of Ciudad Madero, Mexico · to Tue 06Z
Wettest 17.60 in, 30 mi SE of Ciudad Madero, Mexico · to Tue 12Z
Wettest 18.21 in, 30 mi SE of Ciudad Madero, Mexico · to Tue 18Z
Wettest 18.47 in, 30 mi SE of Ciudad Madero, Mexico · to Wed 00Z
Wettest 18.74 in, 30 mi SE of Ciudad Madero, Mexico · to Wed 06Z
Wettest 19.07 in, 30 mi SE of Ciudad Madero, Mexico · to Wed 12Z
Wettest 19.19 in, 30 mi SE of Ciudad Madero, Mexico · to Wed 18Z
Wettest 19.52 in, 30 mi SE of Ciudad Madero, Mexico · to Thu 00Z
Wettest 19.75 in, 30 mi SE of Ciudad Madero, Mexico · to Thu 06Z
Wettest 20.18 in, 30 mi SE of Ciudad Madero, Mexico · to Thu 12Z
Wettest 20.90 in, 30 mi SE of Ciudad Madero, Mexico · to Thu 18Z
Wettest 21.49 in, 30 mi SE of Ciudad Madero, Mexico · to Fri 00Z
Wettest 21.89 in, 30 mi SE of Ciudad Madero, Mexico · to Fri 06Z
Wettest 22.34 in, 30 mi SE of Ciudad Madero, Mexico · to Fri 12Z
Wettest 22.68 in, 30 mi SE of Ciudad Madero, Mexico · to Fri 18Z
Wettest 23.37 in, 30 mi SE of Ciudad Madero, Mexico · to Sat 00Z
Wettest 23.44 in, 30 mi SE of Ciudad Madero, Mexico · to Sat 06Z
Wettest 23.80 in, 30 mi SE of Ciudad Madero, Mexico · to Sat 12Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Sat 18Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Sun 00Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Sun 06Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Sun 12Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Sun 18Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Mon 00Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Mon 06Z
Wettest 23.82 in, 30 mi SE of Ciudad Madero, Mexico · to Mon 12Z
One GEM run, issued 12Z 2 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.