METAR/SPECI::ForecastChangeIndicator

: Public <<enumeration>> Enumeration

Created:	08/08/2012 11:15:25 PM
Modified:	27/03/2013 2:18:58 PM

Project:
Author:	braeckel
Version:	1.0
Phase:	1.0
Status:	Proposed
Complexity:	Easy
Difficulty:
Priority:
Multiplicity:
Advanced:
UUID:	{24BE156A-0412-4a7b-874E-D07C229454A8}
Appears In:	Context Diagram: MeteorologicalAerodromeTrendForecast

Change qualifier of a trend-type forecast or an aerodrome forecast. Defined in WMO No. 306 Vol I.1; FM-15 METAR, FM-16 SPECI and FM-51 TAF. Also see WMO No. 306 Vol I.2 Part B FM 94 BUFR code-table 0 08 016 'Change qualifier of a trend forecast or an aerodrome forecast'.

Attributes

Attribute

Public
NO_SIGNIFICANT_CHANGES

Details:

Alias:
Initial:
Stereotype:	<<enum>>
Ordered:
Range:

Notes:

No significant changes are forecast (NOSIG)

Public
BECOMING

Details:

Alias:
Initial:
Stereotype:	<<enum>>
Ordered:
Range:

Notes:

When the change is forecast to commence at the beginning of the forecast period and be completed by the end of that period, or when the change is forecast to occur within the forecast period but the time of the change is uncertain (possibly shortly after the beginning of the forecast period, or midway or near the end of that period), the change shall be indicated by only the change indicator BECMG.

Public
TEMPORARY_FLUCTUATIONS

Details:

Alias:
Initial:
Stereotype:	<<enum>>
Ordered:
Range:

Notes:

The change indicator TEMPO shall be used to describe expected temporary fluctuations to meteorological conditions which reach or pass specified threshold criteria and last for a period of less than one hour in each instance and in the aggregate cover less than half of the forecast period during which the fluctuations are expected to occur.