Lock Haven, Pennsylvania

==Geography==
[[File:The southern terminus of PA 664.jpg|thumb|PA Routes [[Pennsylvania Route 664|664]] and [[Pennsylvania Route 120|120]] meet near the river in downtown Lock Haven|alt=A highway runs toward a bridge between an ornate building with a clock tower and a plain three-story red brick building. A forested hill rises on the far side of the bridge, which is decorated with U.S. flags on poles. A double highway sign along the road indicates that Highway 120 turns to the left (west) before the bridge and that Highway 664 continues across the bridge and heads generally north. Several cars are moving along the highway and over the bridge.]] 
Lock Haven is the county seat of [[Clinton County, Pennsylvania|Clinton County]].<ref>{{cite web|title=Find a County |publisher=National Association of Counties |year=2005 |url=http://www.naco.org/Template.cfm?Section=Find_a_County&Template=/cffiles/counties/usamap.cfm |access-date=May 11, 2009 |archive-url=https://web.archive.org/web/20080626200900/http://www.naco.org/Template.cfm?Section=Find_a_County&Template=%2Fcffiles%2Fcounties%2Fusamap.cfm |archive-date=June 26, 2008 }}</ref> According to the [[United States Census Bureau]], the city has a total area of {{convert|2.7|sqmi|km2}}, {{convert|2.5|sqmi|km2}} of which is land. About {{convert|0.2|sqmi|km2|1}}, 6&nbsp;percent, is water.<ref>{{cite web|title = United States Gazetteer files: 2014 (places) | url = http://www2.census.gov/geo/docs/maps-data/data/gazetteer/2014_Gazetteer/2014_gaz_place_42.txt | publisher = United States Census Bureau | access-date = April 21, 2015}}</ref>

Lock Haven is at {{convert|561|ft|m|0}} above sea level near the confluence of Bald Eagle Creek and the West Branch of the [[Susquehanna River]] in north-central Pennsylvania.<ref name = "gnis"/><ref name = "Rand"/> The city is approximately {{convert|200|mi|km|-1}} by highway northwest of [[Philadelphia]] and {{convert|175|mi|km|-1}} northeast of [[Pittsburgh]]. [[U.S. Route 220 in Pennsylvania|U.S. Route 220]], a major transportation corridor, skirts the city on its southern edge, intersecting with [[Pennsylvania Route 120]], which passes through the city and connects it with [[Renovo, Pennsylvania|Renovo]] in northern Clinton County. Other highways entering Lock Haven include [[Pennsylvania Route 150|state routes 150]], which connects to Avis, and [[Pennsylvania Route 664|664]].<ref name = "Rand">{{cite map  |publisher = Rand McNally & Company  |title = The Road Atlas  |edition = 2008  |section = 86–89  |isbn = 0-528-93961-0 }}</ref>

The city and nearby smaller communities, including [[Castanea, Pennsylvania|Castanea]], [[Dunnstown, Pennsylvania|Dunnstown]], [[Flemington, Pennsylvania|Flemington]], and [[Mill Hall, Pennsylvania|Mill Hall]], are mainly at valley level in the [[Ridge-and-Valley Appalachians]], a mountain belt characterized by long, even valleys running between long continuous ridges. [[Bald Eagle Mountain]], one of these ridges, runs parallel to Bald Eagle Creek on the south side of the city.<ref name="plan"/> Upstream of the confluence with Bald Eagle Creek, the West Branch Susquehanna River drains part of the [[Allegheny Plateau]], a region of [[dissected plateau|dissected]] highlands (also called the "Deep Valleys Section") generally north of the city.<ref>{{cite web | title = Landforms of Pennsylvania from Map 13, Physiographic Provinces of Pennsylvania | publisher = Pennsylvania Department of Natural Resources and Conservation | url = http://www.dcnr.state.pa.us/cs/groups/public/documents/document/dcnr_016202.pdf| access-date = April 21, 2015|archive-url=https://web.archive.org/web/20150421172859/http://www.dcnr.state.pa.us/cs/groups/public/documents/document/dcnr_016202.pdf|archive-date=April 21, 2015}}</ref><ref name = "NRHP Memorial Park">{{cite web | title = National Register of Historic Places Inventory—Nomination Form: Memorial Park Site, 36Cn164 | publisher = United States National Park Service| url = https://www.dot7.state.pa.us/ce_imagery/phmc_scans/H001002_01H.pdf | access-date = November 12, 2009|archive-url=https://web.archive.org/web/20141020222616/https://www.dot7.state.pa.us/ce_imagery/phmc_scans/H001002_01H.pdf|archive-date=October 20, 2014}}</ref> The geologic formations in the southeastern part of the city are mostly [[limestone]], while those to the north and west consist mostly of [[siltstone]] and [[shale]]. Large parts of the city are flat, but slopes rise to the west, and very steep slopes are found along the river, on the university campus, and along Pennsylvania Route&nbsp;120 as it approaches U.S. Route&nbsp;220.<ref name="plan"/>

===Climate===
Under the [[Köppen climate classification]], Lock Haven is in zone ''Dfa'', meaning a [[humid continental climate]] with hot or very warm summers.<ref>{{cite journal |last1=Kottek |first1=Marcus |last2=Greiser |first2=Jürgen |last3=Beck |first3=Christoph |last4=Rudolf |first4=Bruno |last5=Rubel |first5=Franz |display-authors=2 |title=World Map of Köppen–Geiger Climate Classification |date=June 2006 |journal=Meteorologische Zeitschrift |volume=15 |issue=3 |page=261 |doi=10.1127/0941-2948/2006/0130|bibcode=2006MetZe..15..259K |url=https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/40083 }}</ref> The average temperature here in January is {{convert|28|°F|°C|0}}, and in July it is {{convert|73|°F|°C|0}}. Between 1888 and 1996, the highest recorded temperature for the city was {{convert|106|°F|°C|0}} in 1936, and the lowest recorded temperature was {{convert|-22|°F|°C|0}} in 1912.<ref name = "climatologist"/> The average wettest month is June.<ref name = "climatologist"/> Between 1926 and 1977, the mean annual precipitation was approximately {{convert|39|in|mm}}, and the number of days each year with precipitation of {{convert|0.1|in|mm}} or more was 77.<ref name = "climatologist">{{cite web | author = Pennsylvania State Climatologist | title = Lock Haven Local Climatological Data | url = https://climate.met.psu.edu/data/city_information/lcds/lok.php | publisher = College of Earth and Mineral Sciences at The Pennsylvania State University | access-date = August 7, 2021 | archive-url = https://web.archive.org/web/20150514174005/http://climate.psu.edu/data/city_information/lcds/lok.php | archive-date = May 14, 2015 }}</ref> Annual snowfall amounts between 1888 and 1996 varied from 0 in several years to about {{convert|65|in|cm}} in 1942. The maximum recorded snowfall in a single month was {{convert|38|in|cm}} in April 1894.<ref name = "climatologist"/>

{{Weather box
| location = Lock Haven, Pennsylvania (1926–1977, extremes 1888–1996)
| single line = Y
| Jan record high F = 71
| Feb record high F = 75
| Mar record high F = 86
| Apr record high F = 97
| May record high F = 102
| Jun record high F = 104
| Jul record high F = 105
| Aug record high F = 106
| Sep record high F = 103
| Oct record high F = 93
| Nov record high F = 84
| Dec record high F = 70
| Jan high F = 36.3
| Feb high F = 38.3
| Mar high F = 48.6
| Apr high F = 62.7
| May high F = 74.5
| Jun high F = 82.3
| Jul high F = 86.4
| Aug high F = 84.0
| Sep high F = 76.9
| Oct high F = 65.3
| Nov high F = 51.0
| Dec high F = 38.6
| year high F = 62.3
| Jan mean F = 27.9
| Feb mean F = 28.9
| Mar mean F = 37.9
| Apr mean F = 49.7
| May mean F = 60.4
| Jun mean F = 68.8
| Jul mean F = 72.9
| Aug mean F = 71.1
| Sep mean F = 64.1
| Oct mean F = 52.8
| Nov mean F = 41.6
| Dec mean F = 30.7
| year mean F = 50.7
| Jan low F = 19.4
| Feb low F = 19.5
| Mar low F = 27.1
| Apr low F = 36.7
| May low F = 46.3
| Jun low F = 55.3
| Jul low F = 59.4
| Aug low F = 58.1
| Sep low F = 51.3
| Oct low F = 40.3
| Nov low F = 32.2
| Dec low F = 22.7
| year low F = 39.1
| Jan record low F = −22
| Feb record low F = −21
| Mar record low F = −12
| Apr record low F = 5
| May record low F = 25
| Jun record low F = 34
| Jul record low F = 31
| Aug record low F = 32
| Sep record low F = 20
| Oct record low F = 18
| Nov record low F = 5
| Dec record low F = −15
| year record low F = -22
| precipitation colour = green
| Jan precipitation inch = 2.42
| Feb precipitation inch = 2.21
| Mar precipitation inch = 3.37
| Apr precipitation inch = 3.37
| May precipitation inch = 3.94
| Jun precipitation inch = 4.78
| Jul precipitation inch = 3.31
| Aug precipitation inch = 3.69
| Sep precipitation inch = 3.34
| Oct precipitation inch = 3.02
| Nov precipitation inch = 3.08
| Dec precipitation inch = 2.67
| year precipitation inch = 38.80
| Jan snow inch = 8.5
| Feb snow inch = 8.7
| Mar snow inch = 8.2
| Apr snow inch = 1.4
| May snow inch = 0.0
| Jun snow inch = 0.0
| Jul snow inch = 0.0
| Aug snow inch = 0.0
| Sep snow inch = 0.0
| Oct snow inch = 0.0
| Nov snow inch = 2.6
| Dec snow inch = 7.1
| year snow inch = 36.0
| source 1 = Pennsylvania State Climatologist<ref name = "climatologist"/>
| date     = August 2010
}}