Sun Sep 26, 2021 10:35 am
#1872562
So first thing today, the relevant bit of the Heathrow TAF said this:
EGLL 260504Z 2606/2712 21003KT 6000 FEW040 PROB30
TEMPO 2606/2608 3000 BR BKN008
BECMG 2607/2610 9999
So hardly any cloud, and clearing up nicely by late morning.
A couple of hours later, and it's this:
TAF AMD EGLL 260755Z 2607/2712 21005KT 5000 BR BKN006
BECMG 2608/2611 9999 NSW SCT016
I've noticed this quite a few times in recent months - a TAF AMD is issued hot on the heels of the previous one, and it's invariably much worse.
What suddenly new information do they get in the intervening period, and, more to the point, why was the information the previous one was based on so bad?
A Heathrow TAF issued at 6pm used to be very reliable for the next day, but this has been much less the case in recent times.
EGLL 260504Z 2606/2712 21003KT 6000 FEW040 PROB30
TEMPO 2606/2608 3000 BR BKN008
BECMG 2607/2610 9999
So hardly any cloud, and clearing up nicely by late morning.
A couple of hours later, and it's this:
TAF AMD EGLL 260755Z 2607/2712 21005KT 5000 BR BKN006
BECMG 2608/2611 9999 NSW SCT016
I've noticed this quite a few times in recent months - a TAF AMD is issued hot on the heels of the previous one, and it's invariably much worse.
What suddenly new information do they get in the intervening period, and, more to the point, why was the information the previous one was based on so bad?
A Heathrow TAF issued at 6pm used to be very reliable for the next day, but this has been much less the case in recent times.