Which tool is least in predicting weather

There's one weather forecasting technique known to meteorologists as 'persistence.' Persistence means 'what was...will again be." In other words...today's weather will also be tomorrow's weather.  

In some places...that's not a bad technique.  

Think of sunny southern California where the weather is pretty much the same day in and day out.  

In most places...on most days...the 'persistence' technique would be the least useful tool to predict tomorrow's weather.

I hope this helps :)

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.