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Weather Maps

300mb Charts - Maps of the upper atmosphere provide clues as to surface conditions. This animation of 300mb maps during a strong storm in April 2001 provides clues as to how the upper atmosphere, including the jetstream, evolved and influenced surface conditions. The white lines are height contours and the color coding is wind speed. The region of fastest wind speeds represents the jetstream and an embedded jetstreak.

Department of Atmospheric Sciences Severe and Hazardous Weather at Department of Atmospheric Sciences University of Illinois