How the forecast changed in 24 hours
GFS · Run 00Z 30 Sep → 00Z 1 Oct · +210 h · Valid Fri 18Z 9 Oct
Region Midwest
The readings under the map are for the whole map, not only the part shown.
GFS · Run 00Z 30 Sep → 00Z 1 Oct · +210 h · Valid Fri 18Z 9 Oct
Colder ← °C → warmer · range -21.9 to +21.1 °C
Shows how the forecast for the selected date at 18Z changed over the last 24 hours of model runs.
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 NOAA. 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
- NOAA: GFS, from NOAA's NOMADS server. US government data, not subject to copyright (NOAA/NWS terms of 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.