Region Lower 48
United States
Europe
The readings under the map are for the whole map, not only the part shown.
Surface pressure (hPa) and instantaneous precip rate (mm/h)
ECMWF · Run 00Z 4 Oct · +0 h · Valid Sun 00Z 4 Oct
Surface pressure (hPa) and instantaneous precip rate (mm/h)
Heaviest rate 16.3 mm/h, near 35.75N 81.75W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 14.08 mm/h, near 22.75N 97.5W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 22.79 mm/h, near 30.75N 88.0W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 27.38 mm/h, near 20.0N 113.75W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 36.01 mm/h, near 20.25N 114.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 49.35 mm/h, near 20.0N 115.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 18.93 mm/h, near 37.25N 69.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 34.9 mm/h, near 32.25N 79.0W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 21.77 mm/h, near 29.75N 83.75W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 22.73 mm/h, near 20.0N 118.75W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 38.9 mm/h, near 30.0N 83.0W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 43.77 mm/h, near 29.75N 82.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 29.97 mm/h, near 29.75N 81.5W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 22.38 mm/h, near 31.75N 81.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 27.43 mm/h, near 20.0N 123.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 37.36 mm/h, near 31.5N 74.75W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 29.52 mm/h, near 20.5N 124.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 26.66 mm/h, near 21.75N 124.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 24.96 mm/h, near 22.25N 125.0W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 20.58 mm/h, near 22.25N 85.25W · unshaded ground is where the model has under 0.25 mm/h falling
Heaviest rate 26.0 mm/h, near 22.75N 126.25W · unshaded ground is where the model has under 0.25 mm/h falling
One ECMWF run — issued 00Z 4 Oct — played forward 6 hours at a time, from its analysis to 120 hours out.
Methodology
Step forward and the pressure pattern moves, and the precipitation under it moves with it: that motion is the weather this run forecasts, not the forecast changing — Forecast Evolution is the film for that. Same chart grammar as the surface analysis: the same reduction, the same 2 hPa interval, the same frame; only the forecast hour varies. Six-hourly to 120 hours. ECMWF's 00Z run forecasts out to 360 hours; this film stops at 120. The frames past the one shown load on demand.
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. 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
- ECMWF: IFS, 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.