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University of Wisconsin–Madison

18 UTC GFS/ECMWF Model comparisons (NHEM)

go to 00 UTC run | 06 UTC run | 12 UTC run

Updated through the
90 hour forecast from the 18 UTC model run at
03:36 UTC 12/21/2025 (09:36 PM CST, Sat 12/20/2025)

Mean Sea Level Pressure
Day 1   00h   03h   06h   09h   12h   15h   18h   21h   24h
Day 2   27h   30h   33h   36h   39h   42h   45h   48h
Day 3   51h   54h   57h   60h   63h   66h   69h   72h
Day 4   75h   78h   81h   84h   87h   90h   --   --  
Loops   HTML5 Loop
850 hPa Heights/Temps/winds
Day 1   00h   03h   06h   09h   12h   15h   18h   21h   24h
Day 2   27h   30h   33h   36h   39h   42h   45h   48h
Day 3   51h   54h   57h   60h   63h   66h   69h   72h
Day 4   75h   78h   81h   84h   87h   90h   --   --  
Loops   HTML5 Loop
700 hPa Heights/Relative Humidity/winds
Day 1   00h   03h   06h   09h   12h   15h   18h   21h   24h
Day 2   27h   30h   33h   36h   39h   42h   45h   48h
Day 3   51h   54h   57h   60h   63h   66h   69h   72h
Day 4   75h   78h   81h   84h   87h   90h   --   --  
Loops   HTML5 Loop
500 hPa Heights/Absolute vorticity/winds
Day 1   00h   03h   06h   09h   12h   15h   18h   21h   24h
Day 2   27h   30h   33h   36h   39h   42h   45h   48h
Day 3   51h   54h   57h   60h   63h   66h   69h   72h
Day 4   75h   78h   81h   84h   87h   90h   --   --  
Loops   HTML5 Loop
200 hPa Heights/winds
Day 1   00h   03h   06h   09h   12h   15h   18h   21h   24h
Day 2   27h   30h   33h   36h   39h   42h   45h   48h
Day 3   51h   54h   57h   60h   63h   66h   69h   72h
Day 4   75h   78h   81h   84h   87h   90h   --   --  
Loops   HTML5 Loop