|
Climate Of Rawalpindi
Rawalpindi features a humid subtropical climate ( Köppen: Cwa) with hot summers, and cool to cold winters. Its climate is classified as very similar to its twin city Islamabad, but the geographical location and extreme urbanization of Rawalpindi has led to weather and climatic conditions that are notably different from its twin. Rawalpindi's weather has historically been known to change rather quickly due to its proximity to Himalayas and the Pir Panjal Range. These mountains not only influence the weather of the city, but also provide great recreation during the hot months. Furthermore, Its warm comfortable mean annual temperature of attracts people to live here permanently from all over Pakistan. The average annual rainfall is abundant at , most of which falls in the monsoon season. However, frontal cloud bands also bring significant rainfall in the winter. In summers, June is the hottest with record maximum temperature at a blistering recorded on 13 June 1953. On the oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Humid Subtropical Climate
A humid subtropical climate is a zone of climate characterized by hot and humid summers, and cool to mild winters. These climates normally lie on the southeast side of all continents (except Antarctica), generally between latitudes 25° and 40° and are located poleward from adjacent tropical climates. It is also known as warm temperate climate in some climate classifications. Under the Köppen climate classification, ''Cfa'' and ''Cwa'' climates are either described as humid subtropical climates or warm temperate climates. This climate features mean temperature in the coldest month between (or ) and and mean temperature in the warmest month or higher. However, while some climatologists have opted to describe this climate type as a "humid subtropical climate", Köppen himself never used this term. The humid subtropical climate classification was officially created under the Trewartha climate classification. In this classification, climates are termed humid subtropical when ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microbursts
In meteorology, a downburst is a strong downward and outward gushing wind system that emanates from a point source above and blows radially, that is, in straight lines in all directions from the area of impact at surface level. Capable of producing damaging winds, it may sometimes be confused with a tornado, where high-velocity winds circle a central area, and air moves inward and upward. These usually last for seconds to minutes. Downbursts are particularly strong downdrafts within thunderstorms (or deep, moist convection as sometimes downbursts emanate from cumulonimbus or even cumulus congestus clouds that are not producing lightning). Downbursts are most often created by an area of significantly precipitation-cooled air that, after reaching the surface ( subsiding), spreads out in all directions producing strong winds. Dry downbursts are associated with thunderstorms that exhibit very little rain, while wet downbursts are created by thunderstorms with significant amount ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Extreme Weather Records In Pakistan
The weather extremes in Pakistan include extremely high and extremely low temperatures, heaviest rainfalls and floodings. Pakistan has one of the highest temperature ranges in the world (temperature range refers to the difference between highest and lowest recorded temperatures ever) with proven weather conditions ranging from as high as like those in the Sahara desert, to as low as those like in Alaska making it one of the most climatically diverse countries in the world. The highest temperature ever recorded in Pakistan is which was recorded in Turbat, Balochistan on 28 May 2017. It was not only the hottest temperature ever recorded in Pakistan but also the hottest reliably measured temperature ever recorded on the continent of Asia and the fourth-highest temperature ever recorded on Earth. The second-highest temperature ever recorded in Pakistan is which was recorded in Moenjo Daro, Sindh on 26 May 2010. It is fifth-highest temperature ever recorded on Earth. The highest ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Climate Of Pakistan
Pakistan's climate is a continental type of climate, characterized by extreme variations in temperature, both seasonally and daily, because it is located on a great landmass north of the Tropic of Cancer (between latitudes 25° and 37° N). Very high altitudes modify the climate in the cold, snow-covered northern mountains; temperatures on the Balochistan plateau are somewhat higher. Along the coastal strip, the climate is modified by sea breeze. In the rest of the country, temperatures reach great heights in the summer; the mean temperature during June is in the plains, the highest temperatures can exceed . During summer, hot winds called Loo blow across the plains during the day. Trees shed their leaves to avoid loss of moisture. Pakistan recorded one of the highest temperatures in the world, 53.7 °C (128.66 °F) on 28 May 2017, the hottest temperature ever recorded in Pakistan and also the second hottest measured temperature ever recorded in Asia. The dry, hot wea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Climate Of Islamabad
The climate of Islamabad is a humid subtropical climate (Köppen climate classification) with four seasons: a pleasant Spring (March–April), a hot Summer (May–August), a warm dry Autumn (September—October), and a cold Winter (November—February). The hottest month is June, where average highs routinely exceed . The wettest month is July, with heavy rainfall and evening thunderstorms with the possibility of cloudburst. The coldest month is January, with temperatures variable by location. In Islamabad, temperatures vary from cold to mild, routinely dropping below zero. In the hills there is sparse snowfall. The weather ranges from a minimum of in January to a maximum of in June. The average low is in January, while the average high is in June. The highest temperature recorded was in June, while the lowest temperature was in January. On 23 July 2001, Islamabad received a record breaking of rainfall in just 10 hours. It was the heaviest rainfall in Pakistan during the pas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Urban Heat Island
An urban heat island (UHI) is an urban or metropolitan area that is significantly warmer than its surrounding rural areas due to human activities. The temperature difference is usually larger at night than during the day, and is most apparent when winds are weak. UHI is most noticeable during the summer and winter. The main cause of the UHI effect is from the modification of land surfaces. A study has shown that heat islands can be affected by proximity to different types of land cover, so that proximity to barren land causes urban land to become hotter and proximity to vegetation makes it cooler. Waste heat generated by energy usage is a secondary contributor. As a population center grows, it tends to expand its area and increase its average temperature. The term heat island is also used; the term can be used to refer to any area that is relatively hotter than the surrounding, but generally refers to human-disturbed areas. Monthly rainfall is greater downwind of cities, pa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flash Floods
A flash flood is a rapid flooding of low-lying areas: washes, rivers, dry lakes and depressions. It may be caused by heavy rain associated with a severe thunderstorm, hurricane, or tropical storm, or by meltwater from ice or snow flowing over ice sheets or snowfields. Flash floods may also occur after the collapse of a natural ice or debris dam, or a human structure such as a man-made dam, as occurred before the Johnstown Flood of 1889. Flash floods are distinguished from regular floods by having a timescale of fewer than six hours between rainfall and the onset of flooding. Flash floods are a significant hazard, causing more fatalities in the U.S. in an average year than lightning, tornadoes, or hurricanes. Flash floods can also deposit large quantities of sediments on floodplains and can be destructive of vegetation cover not adapted to frequent flood conditions. Causes Flash floods most often occur in dry areas that have recently received precipitation, but they may ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2001 Islamabad Cloud Burst
On 23 July 2001, Islamabad experienced a record breaking of rainfall, which was the 24 hours heaviest rainfall in Pakistan during the past 100 years. Continuous downpour lasted for about 10 hours from 0600 to 1600 PST in Islamabad and Rawalpindi, caused the worst ever Flash flood in the local stream called Nulla Lai and its tributaries of Rawalpindi, which not only flood the low-lying areas of the twin cities but swept away the banks of the stream and buildings built in the encroachments. Islamabad's twin city, Rawalpindi experienced of rain during this event. Causes The cloud burst was the result of the sequel of vigorously developed cloud due to the combined effect of well marked westerly trough (Westerly wave), passing over 500hpa with enough supply of moisture from southwest monsoon. A surface low pressure formed over Hazara and Malakand division between 34-37ºN and 70-75ºE with central pressure less than 996 hpa. There was a gradually accentuating upper air we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dew Point
The dew point is the temperature to which air must be cooled to become saturated with water vapor, assuming constant air pressure and water content. When cooled below the dew point, moisture capacity is reduced and airborne water vapor will condense to form liquid water known as dew. When this occurs via contact with a colder surface, dew will form on that surface. The dew point is affected by humidity. When there is more moisture in the air, the dew point is higher. When the temperature is below the freezing point of water, the dew point is called the frost point, as frost is formed via deposition rather than condensation. In liquids, the analog to the dew point is the cloud point. Humidity If all the other factors influencing humidity remain constant, at ground level the relative humidity rises as the temperature falls; this is because less vapor is needed to saturate the air. In normal conditions, the dew point temperature will not be greater than the air temperatu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Motorways Of Pakistan
Motorways of Pakistan ( ur, ) are a network of multiple-lane, high-speed, controlled-access highways in Pakistan which are owned, maintained, and operated federally by Pakistan's National Highway Authority. At present, 2816 km of motorways are operational, while an additional 3100 km are under construction or planned. Motorways are a part of Pakistan's “National Trade Corridor Project” and “ China-Pakistan Belt Road Initiative,” from Khunjerab Pass near the Chinese border to Gwadar in Balochistan. There are a total of 16 motorways, 11 of which are operational, while some are under construction and others are planned. All motorways in Pakistan are prefixed with the letter 'M' (for "Motorway") followed by the unique numerical designation of the specific highway (with a hyphen in the middle), e.g. "M-1". History Pakistan's motorways are an important part of Pakistan's "National Trade Corridor Project", which aims to link Pakistan's three Arabian Sea ports ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pakistan Meteorological Department
The Pakistan Meteorological Department (PMD) ( ur, , also known as Pakistan Met Office), is an autonomous and independent institution tasked with providing weather forecasts and public warnings concerning weather for protection, safety and general information. Apart from meteorology, it is also involved in monitoring as well as investigating weather phenomenons, astronomical events, hydrology and research in astrophysics, climate changes and studies on aeronautical engineering, renewable energy resources across various parts of the country. Headquartered in Islamabad. Till 1991, PMD was providing Aviation Weather services to Defense Forces through regular deputation of meteorologists to PAF. However, in 1991, PAF formed its own Met branch and officers are now inducted on regular basis to meet Aviation requirements. The main training however is being imparted by PMD through formal recognized courses. PAF Met branch is now providing weather services to PAF, Army, Navy, and parami ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Funnel Clouds
A funnel cloud is a funnel-shaped cloud of condensed water droplets, associated with a rotating column of wind and extending from the base of a cloud (usually a cumulonimbus or towering cumulus cloud) but not reaching the ground or a water surface. A funnel cloud is usually visible as a cone-shaped or needle like protuberance from the main cloud base. Funnel clouds form most frequently in association with supercell thunderstorms, and are often, but not always, a visual precursor to tornadoes. Funnel clouds are visual phenomena, these are not the vortex of wind itself. "Classic" funnel clouds If a funnel cloud touches the surface the feature is considered a tornado, although ground level circulations begin before the visible condensation cloud appears. Most tornadoes begin as funnel clouds, but some funnel clouds do not make surface contact and these cannot be counted as tornadoes from the perspective of a naked eye observer, even as tornadic circulations of some intensity a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
