Model:

GFS (Global Forecast System) Küresel Hava Tahmin Sistemi Modelleri, " Milli Meteoroloji Merkezlerinden" (NCEP) alınan veriler doğrultusunda oluşturulur(NCEP)

Güncelleme: Günde 4 defa güncellenmek üzere, 05:30, 11:30, 17:30 ve 23:30 saatlerinde oluşturulurlar
Grinwich Saat Farkı: 12:00 GMT = 14:00 EET
Parametre: Geopotential height (tens of m) at 925 hPa (solid line) and Temperature (°C) at 850 hPa (coloured, dashed line)
Tarife: This chart helps to identify areas of densely packed isotherms (lines of equal temperature) indicating a front. Aside from this you can use the modeled temperature in 925 hPa (2000 ft a.s.l.) to make a rough estimate on the expected maximum temperature in 2m above the ground. However, this method does not apply to (winter) inversions.