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Arrest warrants are valid until served or recalled. A warrant can remain active indefinitely.
For ever. Sorry.
Traffic warrants stay active until they are served or satisfied. You may need to bail yourself out to avoid being taken in on a warrant.
The warrant stays active until you resolve it.
Warrants are active until canceled by the court that issued the warrant. They do not expire.
See: http://www.vacriminaldefenselawyer.com/outstandingwarrant.html
24 hours
As long as a ticket goes unpaid in ANY state it will remain in the system indeffinately until it is satisfied/paid. And a warrant (No E in Warrant) is usually issued and that will remain open until you either face a judge or pay your ticket, why not just pay your ticket?
Until the named person voluntarily surrenders to authorities or is taken into custody. Warrants do not expire!
A few hours
Contrary to popular belief/myth/legend, arrest warrants do not expire. They will always remain in NCIC (nationwide) or the state's computer system until you are apprehended and brought before a judge.
Hair bleach does not stay active for very long once it has been mixed. It begins to lose strength quickly and should be used within an hour.