River Flood Warning

until THU 7:52 AM PST, Yakima County

River Flood Warning

until THU 11:00 AM PST, Yakima County

River Flood Warning

until SUN 1:34 AM PST, Snohomish County

River Flood Warning

is in effect, Lewis County, King County, Skagit County, Skagit County, Pierce County, King County, King County, Pierce County, Snohomish County

until SAT 4:00 PM PST, Kittitas County

from SAT 8:42 AM PST until SAT 4:00 PM PST, Kittitas County

River Flood Warning

until SAT 6:44 PM PST, King County

River Flood Warning

until MON 3:06 AM PST, King County

River Flood Warning

until SUN 5:10 PM PST, King County

River Flood Warning

until SUN 2:42 PM PST, Grays Harbor County

River Flood Warning

until SAT 4:39 PM PST, Benton County

Can you guess the most populated zip code?

By Rob Mackay

Published July 18, 2013 8:25pm PDT

The zip code is 50-years-old; but other than a bunch of numbers on our mail what do we really know about it?