NCEP NAM Jet Stream Forecast Model
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Jet Stream at ~41,000 feet
Graphs below show the forecasted 300hPa pressure height(in meters) and the associated winds(in knots). This is roughly equivalent to the jet stream winds at 12.5 kilometers or 41,000 feet. The actual height varies due to atmospheric pressure changes.
North American Mesoscale (NAM) Model (spans 84 hours - 4days)
from National Centers for Environmental Prediction