MSLP + precip rate
GEM · Run 12Z 14 Oct · +6 h · Valid Wed 18Z 14 Oct
Region Europe
United States
Europe
The readings under the map are for the whole map, not only the part shown.
Surface pressure (hPa) and 6-hour averaged precip rate (in/h)
GEM · Run 12Z 14 Oct · +6 h · Valid Wed 18Z 14 Oct
Surface pressure (hPa) and 6-hour averaged precip rate (in/h)
Heaviest 6-hour mean 0.605 in/h, near 66.0N 21.6W · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.523 in/h, near 66.3N 22.05W · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.355 in/h, near 61.65N 5.4E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.379 in/h, near 60.3N 5.55E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.254 in/h, near 41.55N 33.45E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.369 in/h, near 41.85N 34.65E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.152 in/h, near 46.95N 36.15E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.158 in/h, near 41.55N 31.2E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.164 in/h, near 40.8N 34.2E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.175 in/h, near 39.3N 32.55E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.386 in/h, near 41.25N 29.55E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.149 in/h, near 42.6N 29.85E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.309 in/h, near 41.1N 29.7E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.359 in/h, near 38.85N 1.05W · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.374 in/h, near 43.2N 31.8E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.526 in/h, near 39.75N 1.65E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.472 in/h, near 39.75N 1.65E · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.745 in/h, near 63.6N 19.35W · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.552 in/h, near 63.6N 19.5W · unshaded ground is where the model has under 0.01 in/h falling
Heaviest 6-hour mean 0.911 in/h, near 42.9N 4.8E · unshaded ground is where the model has under 0.01 in/h falling
One GEM run — issued 12Z 14 Oct — played forward 6 hours at a time, from 6 hours out 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 4 hPa interval, the same frame; only the forecast hour varies. Six-hourly to 120 hours. GEM forecasts out to 240 hours; this film stops at 120. The frames past the one shown load on demand. GEM publishes no precipitation rate, so the shading here is the 6-hour mean rate — the run's total precipitation at each frame less the total 6 hours before, over 6 — on the same scale as the instant the other models shade with. A mean over 6 hours is smoother and weaker than an instant, so its heavy bands light less often on the same weather; and because no 6-hour bucket ends at the analysis, this film opens at +6 h rather than showing one frame with no rain under it.
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.