Between a Meteorologist and an Air Traffic Controller

A Barometer

Controller: Hello, Steve. I notice some clouds moving in from the West. Are we going to have a change in the weather?

Meteorologist: The forecast we gave you this morning is still valid except that the warm front is moving in towards us a little faster than forecasted. The barometer (4) is dropping rapidly and I believe the rain will probably begin by 0200 hours.

Controller: So I guess we are in for a wet night?

Meteorologist: It may get worse – the spread between (5) the temperature and dew point (6) is two degrees so we may get fog before the front reaches us.

Controller: OK, I'll be prepared for poor visibility. Thanks, Steve, and good-night.