Originally posted by AIR_UK
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Yes, ideal contrail weather! Noticed that the cold easterly winds are acting as headwinds for the transatlantic overfliers with corresponding reduction in speed.
Here is an MD-11 overflier from 2/2/12.
KLM628 (PH-KCD) - Miami to Amsterdam - at 475knots/37000ft above north Anglesey (data from fr24):
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