Editing Allegheny County, Pennsylvania (section)

==Geography==
According to the [[United States Census Bureau|U.S. Census Bureau]], the county has a total area of {{convert|745|sqmi}}, of which {{convert|730|sqmi}} is land and {{convert|14|sqmi}} (1.9%) is water.<ref>{{cite web|url=http://www2.census.gov/geo/docs/maps-data/data/gazetteer/counties_list_42.txt|publisher=United States Census Bureau|access-date=March 4, 2015|date=August 22, 2012|title=2010 Census Gazetteer Files}}</ref>

Four major rivers traverse Allegheny County: the [[Allegheny River]] and the [[Monongahela River]] converge at [[Downtown Pittsburgh]] to form the [[Ohio River]]. The [[Youghiogheny River]] flows into the Monongahela River at [[McKeesport, Pennsylvania|McKeesport]], {{convert|10|mi|km}} to the southeast. There are several islands in these courses. The rivers drain via the [[Mississippi River]] into the [[Gulf of Mexico]]. Although the county's industrial growth resulted in [[clearcutting]] of the area's forests, a significant amount of woodland has regrown.

===Adjacent counties===
*[[Butler County, Pennsylvania|Butler County]] (north)
*[[Armstrong County, Pennsylvania|Armstrong County]] (northeast)
*[[Westmoreland County, Pennsylvania|Westmoreland County]] (east and south)
*[[Washington County, Pennsylvania|Washington County]] (southwest)
*[[Beaver County, Pennsylvania|Beaver County]] (northwest)

===Major roads and highways===
{{div col|colwidth=22em}}
*{{jct|state=PA|I|76|PATP}}
*{{jct|state=PA|I|79}}
*{{jct|state=PA|I|279}}
*{{jct|state=PA|I|376}}
*{{jct|state=PA|BL|376}}
*{{jct|state=PA|I|579}}
*{{jct|state=PA|US|19}}
*{{jct|state=PA|US|22}}
*{{jct|state=PA|US-Bus|22|dab1=Monroeville}}
*{{jct|state=PA|US|30}}
*{{jct|state=PA|PA|8}}
*{{jct|state=PA|PA|28}}
*{{jct|state=PA|Toll|43}}
*{{jct|state=PA|PA|48}}
*{{jct|state=PA|PA|50}}
*{{jct|state=PA|PA|51}}
*{{jct|state=PA|PA|60}}
*{{jct|state=PA|PA|65}}
*{{jct|state=PA|PA|88}}
*{{jct|state=PA|PA|121}}
*{{jct|state=PA|PA|130}}
*{{jct|state=PA|PA|136}}
*{{jct|state=PA|PA|148}}
*{{jct|state=PA|PA|286}}
*{{jct|state=PA|PA|366}}
*{{jct|state=PA|PA|380}}
*{{jct|state=PA|Toll|576}}
*{{jct|state=PA|PA|791}}
*{{jct|state=PA|PA|837}}
*{{jct|state=PA|PA|885}}
*{{jct|state=PA|PA|906}}
*{{jct|state=PA|PA|910}}
*{{jct|state=PA|PA|978}}
*{{jct|state=PA|PA|980}}
{{div col end}}

===Climate===
Allegheny has a [[humid continental climate]] which is hot-summer, (''Dfa'') except in higher elevations, where it is warm-summer (''Dfb'').
{{Pittsburgh weatherbox}}