24-hour precipitation, played forward
Wettest 81 mm at 38.25N 67.5W · Thu 12Z to Fri 12Z
Wettest 82 mm at 38.5N 67.5W · Thu 18Z to Fri 18Z
Wettest 68 mm at 38.5N 67.5W · Fri 00Z to Sat 00Z
Wettest 71 mm, 265 km SE of Atlantic City, New Jersey · Fri 06Z to Sat 06Z
Wettest 131 mm at 20.0N 123.5W · Fri 12Z to Sat 12Z
Wettest 144 mm at 20.0N 123.5W · Fri 18Z to Sat 18Z
Wettest 126 mm at 20.0N 123.5W · Sat 00Z to Sun 00Z
Wettest 109 mm at 22.0N 124.0W · Sat 06Z to Sun 06Z
Wettest 111 mm at 22.0N 124.0W · Sat 12Z to Sun 12Z
Wettest 162 mm at 20.0N 113.5W · Sat 18Z to Sun 18Z
Wettest 167 mm at 20.25N 113.5W · Sun 00Z to Mon 00Z
Wettest 160 mm at 20.25N 113.5W · Sun 06Z to Mon 06Z
Wettest 135 mm at 21.75N 113.5W · Sun 12Z to Mon 12Z
Wettest 120 mm at 22.0N 113.5W · Sun 18Z to Mon 18Z
Wettest 101 mm, 235 km SW of Ciudad Constitución, Mexico · Mon 00Z to Tue 00Z
Wettest 119 mm, 50 km SW of Loreto, Mexico · Mon 06Z to Tue 06Z
Wettest 129 mm, 50 km SW of Loreto, Mexico · Mon 12Z to Tue 12Z
Wettest 130 mm, 50 km SW of Loreto, Mexico · Mon 18Z to Tue 18Z
Wettest 107 mm, 40 km W of Loreto, Mexico · Tue 00Z to Wed 00Z
Wettest 108 mm, 45 km N of Esperanza, Mexico · Tue 06Z to Wed 06Z
Wettest 104 mm, 60 km SSE of Mazatlán, Mexico · Tue 12Z to Wed 12Z
Wettest 67 mm, 95 km SE of Nacozari de García, Mexico · Tue 18Z to Wed 18Z
Wettest 45 mm, 95 km SE of Nacozari de García, Mexico · Wed 00Z to Thu 00Z
Wettest 36 mm, 40 km E of Mitchell, South Dakota · Wed 06Z to Thu 06Z
Wettest 42 mm, 60 km W of Minneapolis, Minnesota · Wed 12Z to Thu 12Z
Wettest 44 mm, 60 km W of Minneapolis, Minnesota · Wed 18Z to Thu 18Z
Wettest 44 mm, 60 km W of Minneapolis, Minnesota · Thu 00Z to Fri 00Z
Wettest 38 mm, 35 km NNW of Minneapolis, Minnesota · Thu 06Z to Fri 06Z
Wettest 26 mm, 55 km NE of Eagle Pass, Texas · Thu 12Z to Fri 12Z
Wettest 29 mm, 55 km NE of Eagle Pass, Texas · Thu 18Z to Fri 18Z
Wettest 27 mm, 80 km ENE of Eagle Pass, Texas · Fri 00Z to Sat 00Z
Wettest 27 mm, 80 km ESE of Houma, Louisiana · Fri 06Z to Sat 06Z
Wettest 23 mm, 65 km SW of Houma, Louisiana · Fri 12Z to Sat 12Z
Wettest 24 mm, 50 km SE of Bowling Green, Kentucky · Fri 18Z to Sat 18Z
Wettest 27 mm at 20.0N 111.25W · Sat 00Z to Sun 00Z
Wettest 43 mm at 20.0N 111.5W · Sat 06Z to Sun 06Z
Wettest 66 mm at 20.0N 111.75W · Sat 12Z to Sun 12Z
One ECMWF AIFS run, issued 12Z 24 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. ECMWF AIFS forecasts out to 360 hours; this film stops at 240. 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 the European Centre for Medium-Range Weather Forecasts (ECMWF). 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
- ECMWF: AIFS Single, from ECMWF's open data. This service is based on data and products of the European Centre for Medium-Range Weather Forecasts (ECMWF). Source: www.ecmwf.int. This ECMWF data is published under a Creative Commons Attribution 4.0 International (CC BY 4.0). ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use.
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.