Model: Global weather forecast model from the "Japan Meteorological Agency"
Update: 5:30 GMT und 18:30 GMT
Greenwich Mean Time: 12:00 GMT = 13:00 BST
Variable: Geopotential Height and Temperature at 850 hPa
Description: 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 850 hPa (5000 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.