More info please - is it a Kilmarnock Willow or have you really got a 50 foot weeping willow? How long have you had it and is it in a pot or the ground, where are you in the UK

I have a Kilmarnock Willow, purchased this year, and about 3 weeks ago the leaves all started to curl and go brown. I kept removing them and made sure I kept it well watered (it's in a pot at the moment) and it has revived wonderfully.

Could it be that it's been deprived of enough water and been battered by all the wind we've had recently? Willows really drink up the water so that would be my first thought....not enough watering.