Misplaced Pages

#830169

35-470: Doylestown includes a number of villages which were formerly independent communities, including Bennetts Corner , Castle Valley, Cross Keys, Dyerstown, Edison, Fountainville, Furlong, Greers Corner, Paul Valley, Tradesville, The Turk, and Vauxtown. Fordhook Farm and Tabor Home for Needy and Destitute Children were listed on the National Register of Historic Places in 1987. It was also the location of

70-718: A ) , {\displaystyle WCI=\left(10{\sqrt {v}}-v+10.5\right)\cdot \left(33-T_{\mathrm {a} }\right),} where: In November 2001, Canada, the United States, and the United Kingdom implemented a new wind chill index developed by scientists and medical experts on the Joint Action Group for Temperature Indices (JAG/TI). It is determined by iterating a model of skin temperature under various wind speeds and temperatures using standard engineering correlations of wind speed and heat transfer rate. Heat transfer

105-543: A v + 0.16 , {\displaystyle T_{\mathrm {wc} }=35.74+0.6215T_{\mathrm {a} }-35.75v^{+0.16}+0.4275T_{\mathrm {a} }v^{+0.16},} where T wc is the wind chill index, based on the Fahrenheit scale; T a is the air temperature in degrees Fahrenheit; and v is the wind speed in miles per hour. Windchill temperature is defined only for temperatures at or below 10 °C (50 °F) and wind speeds above 4.8 km/h (3.0 mph). As

140-548: A − 11.37 v + 0.16 + 0.3965 T a v + 0.16 , {\displaystyle T_{\mathrm {wc} }=13.12+0.6215T_{\mathrm {a} }-11.37v^{+0.16}+0.3965T_{\mathrm {a} }v^{+0.16},} where T wc is the wind chill index, based on the Celsius temperature scale; T a is the air temperature in degrees Celsius; and v is the wind speed at 10 m (33 ft) standard anemometer height , in kilometres per hour. When

175-475: A female householder with no husband present, and 25.9% were non-families. 22.0% of all households were made up of individuals, and 11.7% had someone living alone who was 65 years of age or older. The average household size was 2.63 and the average family size was 3.11. In the township the population was spread out, with 23.7% under the age of 18, 5.4% from 18 to 24, 27.2% from 25 to 44, 25.7% from 45 to 64, and 18.0% who were 65 years of age or older. The median age

210-458: A four-lane freeway that bypasses Doylestown to the west, U.S. Route 202 Business , which runs along State Street from New Britain east to an interchange with the PA 611 freeway, where State Street continues into Doylestown; Pennsylvania Route 263 , which runs north–south along York Road along the eastern border of the township; Pennsylvania Route 313 , which runs northwest–southeast along Swamp Road on

245-405: A small plastic bottle as its contents turned to ice while suspended in the wind on the expedition hut roof, at the same level as the anemometer . The so-called Windchill Index provided a pretty good indication of the severity of the weather. In the 1960s, wind chill began to be reported as a wind chill equivalent temperature (WCET), which is theoretically less useful. The author of this change

280-508: A three- or four-digit number with units of kilocalories /hour per square metre. Each individual calibrated the scale of numbers personally, through experience. The chart also provided general guidance to comfort and hazard through threshold values of the index, such as 1400, which was the threshold for frostbite . The original formula for the index was: W C I = ( 10 v − v + 10.5 ) ⋅ ( 33 − T

315-508: A warm surface heats the air around it, an insulating boundary layer of warm air forms against the surface. Moving air disrupts this boundary layer, or epiclimate, carrying the warm air away, thereby allowing cooler air to replace the warm air against the surface and increasing the temperature difference in the boundary layer. The faster the wind speed, the more readily the surface cools. Contrary to popular belief , wind chill does not refer to how cold things get, and they will only get as cold as

350-405: Is a stub . You can help Misplaced Pages by expanding it . Wind chill Wind chill (popularly wind chill factor ) is the sensation of cold produced by the wind for a given ambient air temperature on exposed skin as the air motion accelerates the rate of heat transfer from the body to the surrounding atmosphere. Its values are always lower than the air temperature in the range where the formula

385-409: Is most rapid at the start of any exposure, when the skin is still warm. The apparent temperature (AT), invented in the late 1970s, was designed to measure thermal sensation in indoor conditions. It was extended in the early 1980s to include the effect of sun and wind. The AT index used here is based on a mathematical model of an adult, walking outdoors, in the shade (Steadman 1994). The AT is defined as

SECTION 10

#1732848275831

420-400: Is unknown, but it was not Siple or Passel as is generally believed. At first, it was defined as the temperature at which the windchill index would be the same in the complete absence of wind. This led to equivalent temperatures that exaggerated the severity of the weather. Charles Eagan realized that people are rarely still and that even when it is calm, there is some air movement. He redefined

455-402: Is valid. When the apparent temperature is higher than the air temperature, the heat index is used instead. A surface loses heat through conduction , evaporation , convection , and radiation . The rate of convection depends on both the difference in temperature between the surface and the fluid surrounding it and the velocity of that fluid with respect to the surface. As convection from

490-509: Is −0.7 °F (−18.2 °C). Since 1981, the coldest air temperature was −11.8 °F (−24.3 °C) on 01/22/1984. Episodes of extreme cold and wind can occur with wind chill values < −11 °F (−24 °C). The average annual snowfall (Nov-Apr) is between 30 inches (76 cm) and 36 inches (91 cm). Ice storms and large snowstorms depositing ≥ 12 inches (30 cm) of snow occur once every few years, particularly during nor’easters from December through February. According to

525-636: The A. W. Kuchler U.S. potential natural vegetation types, Doylestown Twp would have a dominant vegetation type of Appalachian Oak ( 104 ) with a dominant vegetation form of Eastern Hardwood Forest ( 25 ). The plant hardiness zone is 6b with an average annual extreme minimum air temperature of −0.7 °F (−18.2 °C). The spring bloom typically begins by April 11 and fall color usually peaks by October 30. As of 2018 there were 110.42 miles (177.70 km) of public roads in Doylestown Township, of which 32.96 miles (53.04 km) were maintained by

560-598: The DART South bus, which runs to Warrington . Bennetts Corner, Pennsylvania Bennetts Corner is a populated place in Solebury Township , Bucks County , Pennsylvania at the intersection of Edison Furlong Road and Pebble Hill Road about 2 miles (3.2 km) southeast of Doylestown . Bennetts Corner was named from the Bennett family who owned land in the area prior to 1870, and has been known by this name since

595-637: The Delaware Valley University station in Doylestown Township along its route between Doylestown and Center City Philadelphia . Bucks County Transport operates the Doylestown DART bus which serves points of interest in the township and provides service into Doylestown. The Doylestown DART connects at Delaware Valley University with the DART West bus, which runs to New Britain and Chalfont , and connects at Doylestown Point Shopping Center with

630-509: The Pennsylvania Department of Transportation (PennDOT) and 77.46 miles (124.66 km) were maintained by the township. Major roads in Doylestown Township include U.S. Route 202 , which runs southwest–northeast through the township along a two-lane expressway -grade parkway before becoming a four-lane freeway that bypasses Doylestown to the south; Pennsylvania Route 611 , which runs north–south along Easton Road before becoming

665-849: The poverty line , including 2.6% of those under age 18 and 4.8% of those age 65 or over. According to the Köppen climate classification system, Doylestown Twp has a Hot-summer, Humid continental climate ( Dfa ). Dfa climates are characterized by at least one month having an average mean temperature ≤ 32.0 °F (0.0 °C), at least four months with an average mean temperature ≥ 50.0 °F (10.0 °C), at least one month with an average mean temperature ≥ 71.6 °F (22.0 °C) and no significant precipitation difference between seasons. Although most summer days are slightly humid in Doylestown Twp, episodes of heat and high humidity can occur with heat index values > 106 °F (41 °C). Since 1981,

700-561: The 2010 census, the township was 92.4% White, 1.3% Black or African American, 0.1% Native American, 1.9% Asian, 0.1% Native Hawaiian or other Pacific Islander, and 1.5% were two or more races. 2.8% of the population were of Hispanic or Latino ancestry. As of the census of 2000, there were 17,619 people, 5,999 households, and 4,445 families residing in the township. The population density was 1,136.7 inhabitants per square mile (438.9/km). There were 6,200 housing units at an average density of 400.0 per square mile (154.4/km). The racial makeup of

735-643: The U.S. and Canadian weather services use a model accepted by the National Weather Service . That model has evolved over time. The first wind chill formulas and tables were developed by Paul Allman Siple and Charles F. Passel working in the Antarctic before the Second World War, and were made available by the National Weather Service by the 1970s. They were based on the cooling rate of

SECTION 20

#1732848275831

770-476: The absence of wind to be an air speed of 1.8 metres per second (6.5 km/h; 4.0 mph), which was about as low a wind speed as a cup anemometer could measure. This led to more realistic (warmer-sounding) values of equivalent temperature. Equivalent temperature was not universally used in North America until the 21st century. Until the 1970s, the coldest parts of Canada reported the original Wind Chill Index,

805-494: The air temperature falls, the chilling effect of any wind that is present increases. For example, a 16 km/h (10 mph) wind will lower the apparent temperature by a wider margin at an air temperature of −20 °C (−4 °F) than a wind of the same speed would if the air temperature were −10 °C (14 °F). The 2001 WCET is a steady-state calculation (except for the time-to-frostbite estimates). There are significant time-dependent aspects to wind chill because cooling

840-502: The air temperature. This means radiators and pipes cannot freeze when wind chill is below freezing and the air temperature is above freezing. Many formulas exist for wind chill because, unlike temperature, wind chill has no universally agreed-upon standard definition or measurement. All the formulas attempt to qualitatively predict the effect of wind on the temperature humans perceive . Weather services in different countries use standards unique to their country or region; for example,

875-627: The formerly listed Fretz Farm . According to the U.S. Census Bureau , the township has a total area of 15.6 square miles (40 km), of which, 15.5 square miles (40 km) of it is land and 0.1 square miles (0.26 km) of it (0.51%) is water. It is drained by the Neshaminy Creek into the Delaware River . Natural features include Almshouse Hill, Featherbed Hill, Flatiron Hill, Fretz Valley, Iron Hill, Little Buckingham Mountain, Mill Creek, Neshaminy Creek , Pebble Hill, and Pine Run. As of

910-429: The highest air temperature was 103.0 °F (39.4 °C) on 07/22/2011, and the highest daily average mean dew point was 75.3 °F (24.1 °C) on 08/12/2016. The average wettest month is July which corresponds with the annual peak in thunderstorm activity. Since 1981, the wettest calendar day was 7.23 inches (184 mm) on 09/16/1999. During the winter months, the average annual extreme minimum air temperature

945-444: The important factor of humidity and is somewhat more involved than the simpler North American model. The North American formula was designed to be applied at low temperatures (as low as −46 °C or −50 °F) when humidity levels are also low. The hot-weather version of the AT (1984) is used by the National Weather Service in the United States. In the United States, this simple version of

980-602: The mid-1800s. Bennetts Corner was entered into the Geographic Names Information System on 2 August 1979 as identification number 1203065, its elevation is listed as 217 feet (66 m). An unnamed tributary of the Neshaminy Creek , part of the Delaware River watershed runs through the village. It is located in the Doylestown (18901) Zip code , and the telephone Area codes 215, 267, and 445 . This Bucks County, Pennsylvania state location article

1015-694: The northeastern border of the township; Almshouse Road, which runs east–west through the southern portion of the township; and Lower State Road, which runs southwest–northeast through the township and heads into Doylestown. SEPTA provides bus service to Doylestown Township along the SEPTA City Bus Route 55 line, which follows Pennsylvania Route 611 and Easton Road through the township, heading north to Doylestown and south to Willow Grove and Olney Transportation Center in North Philadelphia . SEPTA Regional Rail 's Lansdale/Doylestown Line stops at

1050-483: The temperature and relative humidity using the equation: e = R H 100 ⋅ 6.105 ⋅ exp ⁡ ( 17.27 ⋅ T a 237.7 + T a ) , {\displaystyle e={\frac {\mathrm {RH} }{100}}\cdot 6.105\cdot \exp {\left({\frac {17.27\cdot T_{\mathrm {a} }}{237.7+T_{\mathrm {a} }}}\right)},} where: The Australian formula includes

1085-514: The temperature is −20 °C (−4 °F) and the wind speed is 5 km/h (3 mph), the wind chill index is −24. If the temperature remains at −20 °C and the wind speed increases to 30 km/h (19 mph), the wind chill index falls to −33. The equivalent formula in US customary units is: T w c = 35.74 + 0.6215 T a − 35.75 v + 0.16 + 0.4275 T

Doylestown Township, Pennsylvania - Misplaced Pages Continue

1120-434: The temperature, at the reference humidity level, producing the same amount of discomfort as that experienced under the current ambient temperature and humidity. The formula is: A T = T a + 0.33 e − 0.7 v − 4.00 , {\displaystyle \mathrm {AT} =T_{\mathrm {a} }+0.33e-0.7v-4.00,} where: The vapour pressure can be calculated from

1155-405: The township was 95.22% White , 2.59% African American , 0.06% Native American , 1.25% Asian , 0.02% Pacific Islander , 0.20% from other races , and 0.64% from two or more races. Hispanic or Latino of any race were 1.40% of the population. There were 5,999 households, out of which 35.1% had children under the age of 18 living with them, 66.7% were married couples living together, 5.6% had

1190-415: Was 42 years. For every 100 females there were 96.7 males. For every 100 females age 18 and over, there were 94.1 males. The median income for a household in the township was $ 81,226, and the median income for a family was $ 93,984. Males had a median income of $ 62,853 versus $ 36,180 for females. The per capita income for the township was $ 38,031. About 1.6% of families and 3.7% of the population were below

1225-490: Was calculated for a bare face in wind, facing the wind, while walking into it at 1.4 m/s (5.0 km/h; 3.1 mph). The model corrects the officially measured wind speed to the wind speed at face height, assuming the person is in an open field. The results of this model may be approximated, to within one degree, from the following formulas. The standard wind chill formula for Environment Canada is: T w c = 13.12 + 0.6215 T

#830169