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Page Title:
The Forecast Minimum Altimeter Setting Group |
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The Forecast Minimum Altimeter Setting Group QNPHP2P2P2P2INS is the forecast minimum altimeter setting group. This group is used in the initial forecast period and for each section of the forecast covered by the change groups GRADU and RAPID. It is not included in forecast modifier sections identified by the terms INTER or TEMPO. QNPH is the identifier that a minimum altimeter setting (minimum sea level pressure) follows. Certain regions in the Mid-East and Africa report QFE instead of QNH. QFE is the station pressure.P2P2P2P2 is the forecast lowest altimeter setting that will occur during the period of time covered by that section of the forecast. It is entered to the nearest hundredths of an inch with the decimal point deleted.INS is the units indicator for inches. As an example, the lowest forecast altimeter for a forecast period is 29.87 inches; this group would be entered as QNH2987INS.Learning Objective: Identify the types of remarks that may be used within a TAF. REMARKS Remarks may be entered following the minimum altimeter setting forecast group QNH whenever the forecaster feels the remarks are significant. As we discussed previously, these remarks may include ceiling designation; visibility variations statements; modified cloud groups to encode partial obscurations; wind variation statements; maximum wind gust direction; the levels of extreme turbulence; or statements such as TSTMS OVR MTNS W, TSTMS VCNTY, or FG OVR RIVER EAST. Generally, any item that is significant for flying safety and is not covered by the forecast may be entered as a remark. All remarks should use standard abbreviations and contractions as contained in Contractions, FAA Handbook 7340.1, commonly referred to as the Contractions Manual. This publication is available from the DMA Combat Support Center in Washington, D.C.All remarks should be entered in order. The first remark is always the ceiling designation, followed by the modified group for partial obscurations. The remainder of the remarks should be arranged in the order that the code group appears in the code format.Learning Objective: Identify the different change groups and state when these groups should be used in the TAF. |
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