Geoscience Reference
In-Depth Information
Plate 18
Satellite photograph of North America taken at 17:00 hours GMT on 12 February 1979 from a GOES weather satellite located some 35,800
km above the equator. Two depressions are located below an upper jet stream located between polar and subtropical high-pressure cells. The more
westerly depression is forming in the lee of the Rocky Mountains; cold polar air streaming off New England is becoming cloudy over the warmer sea;
weak easterly waves (dashed) have developed equatorward of the subtropical high-pressure cells over the Caribbean and Central America (
courtesy
of NOAA
).
