This one must be up there with the best:
TAF EGKK 070500Z 0706/0812 09010KT 9999 SCT035 TEMPO 0706/0712 4000 RA PROB30 TEMPO 0708/0712 10015G25KT BKN008 TEMPO 0712/0801 6000 SHRA BKN012 PROB40 TEMPO 0712/0722 3000 +TSRA BKN009CB BECMG 0720/0723 22014KT TEMPO 0801/0806 6000 -RA BKN010 PROB30 TEMPO 0801/0804 4000 RA BKN007 BECMG 0804/0807 23018G30KT PROB40 TEMPO 0808/0812 5000 SHRA
According to Word word count, the concurrent
EGLL 070453Z 0706/0812 09010KT 9999 SCT045 TEMPO 0706/0714 4000 RA PROB30 TEMPO 0710/0714 BKN009 TEMPO 0714/0723 6000 SHRA PROB30 TEMPO 0714/0723 3000 +SHRA TSRA BECMG 0720/0723 VRB04KT BECMG 0723/0802 24014KT PROB30 TEMPO 0723/0804 7000 SHRA BKN012 TEMPO 0804/0809 24018G28KT 7000 -RA BKN014 TEMPO 0809/0812 24020G32KT PROB30 TEMPO 0809/0812 6000 SHRA
Is one word longer 
Funnily enough, I was looking at this as you posted, as I need to decide whether to do a low level over London flight tomorrow morning.
Timothy wrote:
as I need to decide whether to do a low level over London flight tomorrow morning.
This was from a post a couple of yers ago and maybe answers your question ?
I eventually decided that, while a VFR flight at 1500’ would probably be safe and legal, it is unlikely to be a pleasure, which is sort of the point of a pleasure flight, so I cancelled.
Here is one I 3D-printed:
Another good one
EGKK 310457Z 3106/0112 19010KT 9999 FEW015 BKN030 BECMG 3106/3108 18015G25KT BECMG 3109/3111 19022G35KT TEMPO 3111/3114 6000 RA PROB40 TEMPO 3111/3114 3500 +RA BKN012 BECMG 3112/3114 23020G30KT BECMG 3114/3117 23009KT PROB30 TEMPO 3123/0104 6000 -DZ BKN012 BECMG 0104/0106 20015G25KT TEMPO 0104/0112 6000 -RA BKN012 PROB40 TEMPO 0104/0112 4000 RA BKN008 TEMPO 0106/0109 20020G35KT
