weather minima

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weather minimum

The worst weather conditions in terms of visibility, RVR (runway visual range), and cloud ceiling for landing at a given runway or landing field either under conditions of visual flying or of instrument flying. These conditions are prescribed by directives and standing operating procedures in terms of minimum ceiling, visibility, RVR, or specified hazards to flight. The appropriate regulatory authority (e.g., FAA) lays down these conditions. The operator may lay down additional restrictions over and above those laid down by the authority. Also called weather minima.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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(c) IFR alternate airport weather minima. Unless otherwise authorized by the Administrator, no person may include an alternate airport in an IFR flight plan unless appropriate weather reports or weather forecasts, or a combination of them, indicate that, at the estimated time of arrival at the alternate airport, the ceiling and visibility at that airport will be at or above the following weather minima:
Everything that the crew needed to know--including engine-out weather minima and the nearest company-suitable airport--was developed by a team of professional, FAA-certificated flight dispatchers.
IFR basics, like the weather minima needed for an alternate or fuel requirements need to be burned into your brain.

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