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generaltso

Marcy Projects
Joined
Jan 12, 2002
Posts
653
Here is a TAF:
TAF KEWR 131120Z 131212 25007KT 4SM -SHRA BR SCT015 SCT020 OVC035
TEMPO 1214 2SM -SHRA BR SCT007 BKN015 OVC035
FM1500 28008KT 6SM -SHRA FEW007 OVC070 TEMPO 1516 4SM -SHRA
FM1700 31011KT P6SM SCT030 BKN150
FM1900 31008KT P6SM SKC
FM0400 19004KT P6SM SKC
Your arrival time is 1555. Do you need an alternate?
 
Here is a TAF:
TAF KEWR 131120Z 131212 25007KT 4SM -SHRA BR SCT015 SCT020 OVC035​

TEMPO 1214 2SM -SHRA BR SCT007 BKN015 OVC035​

FM1500 28008KT 6SM -SHRA FEW007 OVC070 TEMPO 1516 4SM -SHRA​

FM1700 31011KT P6SM SCT030 BKN150​

FM1900 31008KT P6SM SKC​

FM0400 19004KT P6SM SKC​
Your arrival time is 1555. Do you need an alternate?

no alternate required
 
Here is a TAF:
TAF KEWR 131120Z 131212 25007KT 4SM -SHRA BR SCT015 SCT020 OVC035
TEMPO 1214 2SM -SHRA BR SCT007 BKN015 OVC035
FM1500 28008KT 6SM -SHRA FEW007 OVC070 TEMPO 1516 4SM -SHRA
FM1700 31011KT P6SM SCT030 BKN150
FM1900 31008KT P6SM SKC
FM0400 19004KT P6SM SKC
Your arrival time is 1555. Do you need an alternate?

Some have said that the TEMP 1214 statement above means this:
Tempo from 1200 to 1459
 
The TEMPO group is used for any conditions in wind, visibility, weather, or sky condition which are expected to last for generally less than an hour at a time (occasional), and are expected to occur during less than half the time period. The TEMPO indicator is followed by a four-digit group giving the beginning hour and ending hour of the time period during which the temporary conditions are expected. Only the changing forecast meteorological conditions are included in TEMPO groups. The omitted conditions are carried over from the previous time group.

Examples:

  • SCT030 TEMPO 1923 BKN030 -
Three thousand scattered with occasional ceilings three thousand broken between 1900Z and 2300Z.

  • 4SM HZ TEMPO 0006 2SM BR HZ -
Visibility four in haze with occasional visibility two in mist and haze between 0000Z and 0600Z.
 

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