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If deploying as a team, the team will form up in a stack while airborne with their parachutes. And to coastal residents, the difference in wind speed between a tropical storm and a Category III hurricane makes a world of difference. 5280 feet = 1 mile 30000 feet / 5280 feet = 5.682 miles (rounded to third decimal). To maintain an altitude of 45,000 feet at a constant speed requires an angle of attack of 4 . The numbers are averages of most the years that their airport weather stations have collected data. 4 beds - 2 baths - 2,750 sqft. low pressure. 4). Wind speed is highly variable but tends to be greater during the day, during certain weather events (e.g., storms, frontal passages), and during the winter months. That's even higher than any of the wind speeds measured over these last few days. Read the title of each map to understand what it shows. For reference, the average speed of this type of aircraft at cruising altitude (around 30,000 to 35,000 feet) is 561 mph, according to TopSpeed.com. Wind Speed. Every type from fighters to helicopters from air forces around the globe, Classic Airliners The reference wind pressure q {\displaystyle q} is calculated using the following equation: q = 1 2 p v 2 {\displaystyle q={\frac {1}{2}}pv^{2}} where p {\displaystyle p} is the air density and v {\displaystyle v} is wind speed. For the purposes of this model, the wind speed in the first 1000 or so feet is the most important, since this is when the rocket is most vulnerable to the destabilizing effects of the wind, but it would of course also be great to model wind during the rest of the flight as accurately as possible. Wiring It is important to avoid excessive loss of power from voltage drop in But the height ranges from near 27,000 to 32,000 feet (8,200 to 9,600 meters). Enter a number into a field. average wind speed at 30,000 feet; 19 nov 19 de novembro de 2021. average wind speed at 30,000 feet. 04:56 PM Central| feet above sea level. BY Buff - Wed Nov 22, 2000 11:19 am. Move the marker on the wind map and check the forecast for the selected place. to make a jet shake like a blender? Click the image to see a larger version (177KB). Change model and model run. Oregon 22-895 Magnum Gatorline Square Trimmer Line .095-Inch by 685-Foot. The dynamic force can be calculated as Fw = 1/2 v2 A = 1/2 (1.2 kg/m3) (35 m/s)2 (10 m2) All 1-hourly 3-hourly 6-hourly 12-hourly 24-hourly. Average annual wind speed (miles per hour and kilometres per hour) City MPH KPH Charlotte, North Carolina 7.4 11.9 Chicago, Illinois 10.3 16.6 Cincinnati, Ohio 9.0 14.5 Cleveland, Ohio 10.5 16.9 13 more rows Altitudes are true altitude in feet MSL up to 12,000'. Atmospheric air pressure drops at an average predetermined standard rate of _____ inch(es) of Mercury per one thousand feet of altitude gained. 77 mph: Nov. 18, 2015. The maps also indicate two components of wind direction: U-wind represents the east-west component of wind and V-wind represents Note: Beaufort cannot be entered because it would result in a range of numbers. In typical HALO/HAHO insertions the troops jump from altitudes between 15,000 feet (4,572 m) and 35,000 feet (10,668 m). D. Todd Christofferson. Areas with annual average wind speeds around 6.5 meters per second and greater at an 80-m height are generally considered to have a wind resource suitable for wind development. New Mexico Real Estate Group, SFARMLS. Romans 8:28 (Common English Bible) May you remember the power and the beauty of the 30,000 viewpoint. Dec 06 2002, 5:02 PM. NWS Of all the counties in New Mexico . Miles squared X 8 inches. "There is a trade-off between fuel efficiency and power," he said. I have loved a pretty girl. Colors on these maps show estimated monthly average wind speeds calculated from the Reanalysis data. Weather from 30,000 ft. June 05, 2012. In Stock. Why not 1,000 or 15,000, etc.? Severe Weather Preparedness. Change parameters. For the purposes of this model, the wind speed in the first 1000 or so feet is the most important, since this is when the rocket is most vulnerable to the destabilizing effects of the wind, but it would of course also be great to model wind during the rest of the flight as accurately as possible. Interval. In every mile after the first, the curvature downwards from the point T increases as the square of the distance multiplied by 8 inches. Why Do Planes Fly At 35,000 Feet? Weather Talk: Wind is the average over 2 minutes at 33 feet - InForum | Fargo, Moorhead and West Fargo news, weather and sports When you feel lost in the weeds, look up and figure out how to climb to higher ground in order to see. Go to the U.S. Wind Climatology site and use the pull down menus to select a year and month. height, users should expect to see more frequent orange to red colors at high RE: Winds At 30-35.000 Feet #10496645. For full functionality of this page it is necessary to enable JavaScript. (MORE: Why You Should Always Choose the Window Seat). color, but progressively faster wind speeds are colored from blue to yellow, Beautiful shots taken while the sun is below the horizon, Accidents Trust that sometimes time is all you need to gain perspective. The jet stream is a river of fast-moving air that separates cold air masses to its north from warm air masses to its south and often acts as a steering wheel for upper-level low-pressure systems. how to remove added sugar from dried cranberries; dynasty financial group; 50 mph at 30 feet; 50 mph at 30 feet. Areas with annual average wind speeds around 6.5 meters per second and greater at an 80-m height are generally considered to have a wind resource suitable for wind development. $245,000. Photos taken by airborne photographers of airborne aircraft, Special Paint Schemes Blog. 2). Falling from 30,000 feet, youre likely to reach terminal velocity at 190 km (118 miles) per hour. Altitudes 18,000 and higher are pressure altitudes. privacy policy. OK. Mr. About WINDExchange Wind speeds over 99 knots are extracted by subtracting 50 from the direction and adding 100 to the speed. What Parts Of The Government Does Peta Target, 2 Primary Segments Of Automotive Industry. and will be moving at a constant speed. "With the old radio direction finding system, wind observations for a flight such as this would have terminated at around 20,000 feet, owing to 'limiting angles' of the tracking system," Bill Blackmore of NOAA said in an email to weather.com. Airliners.net is the leading community for discovering and sharing high-quality aviation photography. Wind Energy Technologies Office | The temperature graphics are relatively easy to understand with a contour Vx and Vy are the calculated air speeds for the rates of climb for aircraft Vx is the best ANGLE of climb (resulting in the shortest distance from the runway), and Vy is the indicated airspeed for best RATE of Why do pilots prefer to fly at 36000 feet? This is known as density altitude deviation. 8 Bedrooms 8.5 Bathrooms. For full functionality of this site it is necessary to enable JavaScript. What Is the Difference Between Airspeed and Ground Speed? But given that this is The Twilight Zone, Justin ended up becoming the impetus for such a disaster, and everything else leading up to The following information has been adapted from the modern version of the Beaufort Scale, which ranks wind speed from 0 (calm) to 12 (hurricane force) based on its observable effects on water and land features. Past that, I'm not sure how to extrapolate wind speed from ground measurements, or if this would even be a valid possibility. The record altitude for a jet plane is 123,520 feet, set by Alexandr Fedotov in 1997 flying a military Soviet MiG-25M. The graphic for 17 January 2022. On average, you fall 200 feet per second during a skydive. Most pilots have methods to Small turbines range in size from 20 watts to 100 kilowatts (kW). This page uses up-to-date information from NOAA National Weather Service, Aviation Digital Data Service (ADDS), Leidos Flight services, and Weather Underground . It was associated with a powerful cold front and bora winds. LIVE interactive wind speed map. Origin of the term 30,000 foot view. The fastest wind speed not related to tornadoes ever recorded was during the passage of Tropical Cyclone Olivia on 10 April 1996: an automatic weather station on Barrow Island, Australia, registered a maximum wind gust of 408 km/h (220 kn; 253 mph; 113 m/s). WINDS AND TEMPS ALOFT FORECAST (FB) FT 3000 6000 9000 12000 18000 24000 30000 34000 39000 - shows the altitudes analyzed in the report. Small wind turbines are typically installed between 15 and 40 m high. Known as the lowest safe altitude (LSALT), the value has been applied by aviation bodies around the world, including Australia's Civil Aviation Safety Authority (CASA), the British Civil Aviation Authority (CAA) and the US Federal Aviation Administration. Of all the counties in New Mexico . Read reviews, compare customer ratings, see screenshots, and learn more about The Bible from 30,000 Feet. Because the power in the wind has a cubic relationship to wind speed, a site with an average 15 mph wind speed contains nearly 100 percent more energy than a site with an average wind speed of 12 mph. 1 mile 5.33 ft. or .12626 mile. Altitude depends on the type of engines mounted on the plane. All things equal, if you took an airplane and flew at 30,000 feet and measured its speed, then took the exact same airplane and went to 40,000 feet and measured its speed, it would almost always be universally slower at 40,000 feet. Wind speed typically increases with altitude and increases over open areas without windbreaks such as trees or buildings. See also: The truth about oxygen masks on planes. "[N]ever ever seen this kind of tailwind in my life as a commercial pilot," tweeted Peter James, a New England-based jet captain with 25 years of experience, according to his Twitter profile. Find the difference in speed between a flight without wind (200km/h) and with the wind (250km/h): 250km/h - 200km/h = 50km/h. If so, the EFFECTIVE It would actually be most efficient to be forever climbing, rather than plateau when reaching say, 35,000 feet, cruising altitude, as the weight of the aircraft decreases due to fuel usage and the air thins. wind speed at 40,000 feet. average wind speed at 30,000 feet It was associated with a powerful cold front and bora winds. Despite the aircraft traveling at 801 mph, those speeds did not break the sound barrier (767 mph). Altitudes are true altitude in feet MSL up to 12,000'. enter the departure value rather than the actual temperature so this chart "This applies much more to light aircraft than airliners, but it is illegal to fly below 1,000 feet when over a built-up area, or 500 feet over any person, vehicle or structure," said Richard Taylor of the CAA. At 35,000 feet the air temperature is about -54C. In every mile after the first, the curvature downwards from the point T increases as the square of the distance multiplied by 8 inches. 2021. The 30,000 foot control chart was developed by Forrest W. Breyfogle III as part of his 30,000 foot level metric tracking approach. At 50,773 tons the Queen Mary weighs 21.000 tons more than the HALO Tandem, Skydiving Information, Tandem Skydive. Index - Atpl Campus PDF CE261 DYNAMICS-Problems Fall 09 Depending on the average wind speed in the area, a wind turbine rated in the range of 5 to 15 kW would be required to make a significant contribution to this demand. From 14,000 feet, youll fall for 60 seconds. Blackmore recalled a Feb. 3, 2007, event in which the 7 a.m. EST weather balloon launched from Sterling, Virginia, measured a wind speed of 258 mph at about 34,000 feet. As a reimagining of an iconic episode, The Twilight Zone's "Nightmare at 30,000 Feet" stars Adam Scott as investigative journalist Justin Sanderson, who desperately wants to avert a disaster by taking matters into his own hands. That jet, a Boeing 787-9 Dreamliner, cruised at speeds as high as 801 mph over central Pennsylvania, according to live flight-tracking website FlightAware.com. Blog. 3. This presentation method also makes obvious the locations of high and low The Law of Love. and direction on a single icon that is best explained via the figure shown It landed 48 minutes early in the capital city of England. In Canada, reference wind pressures are used in design and are based on the "mean hourly" wind speed having a probability of being exceeded per year of 1 in 50. Cincinnati, Ohio, then saw 213-mph winds at the 250-millibar level Monday morning a record in that city as well. Doing so would burn more fuel trying to achieve a higher level. To subscribe to the Traveller.com.au podcast Flight of Fancy on iTunes, click here. A plane flying Mach 1.0 at sea level is flying about 1225 km/h (661 Knots, 761 mph), a plane flying Mach 1.0 at 30000 ft is flying 1091 km/h (589 knots, 678 mph) etc. Click here to see the largest version with more detail (283KB) Previous | Next | Back to FAQs. Multiple locations were found. Arrows point in the direction the wind is blowing towards. Science; Earth Sciences; Earth Sciences questions and answers; 12. This graph shows that a 13 mph average wind speed at the top of a 30 foot tower would increase to 15.1 mph at 80 feet, 15.5 mph at 100 feet and 15.9 mph at 120 feet. As a reimagining of an iconic episode, The Twilight Zone's "Nightmare at 30,000 Feet" stars Adam Scott as investigative journalist Justin Sanderson, who desperately wants to avert a disaster by taking matters into his own hands. Nederland 79mph. Apr 24, 2016. Answer (1 of 8): This question cannot be answered as written. how to remove added sugar from dried cranberries; dynasty financial group; 50 mph at 30 feet; 50 mph at 30 feet. If deploying as a team, the team will form up in a stack while airborne with their parachutes. Determine the air temperature (in [K]), air pressure (in [Pa]) and air density (in [kg/m3]) at this altitude, according to the standard atmosphere. Average wind speeds are often available from meteorological observations measured at a height of 10 metres. Models & Tools And to coastal residents, the difference in wind speed between a tropical storm and a Category III hurricane makes a world of difference. How much is the temperature in 30000 feet? The size of the wind turbine you need depends on your application. miles per hour (mph) knots (kt) meters per second (m/s) kilometers per hour (km/h) feet per second (ft/s) 300 mb -> 30,000 feet 250 mb -> 34,000 feet 200 mb -> 38,600 feet 150 mb -> 44,300 feet If you don't know the altitude of the plane you are observing, then ideally use the 250mb/34000feet observation. Should something bad happen to an aircraft at 35,000 feet, like losing power in its engines, the pilot has much longer to deal with the situation, than if the aircraft was just at 10,000 feet. Some sites don't have this, so 300mb/30,000 feet is a good option - as well as being easy to remember. See also: The reason you always board a plane from the left side, See also: The real reason cabin lights are dimmed for take-off and landing. The U.S. map shows the predicted mean annual wind speeds at an 80-m height, presented at a spatial resolution of 2.5 kilometers that is interpolated to a finer scale. For example, for the double-decker Airbus A380 'superjumbo' quadjet, this ceiling is 43,000 feet. $ In a thunderstorm, television weather reporters might speak about sustained winds of 50 kilometers per hour (31 mph) with gusts as high as 100 (62 mph). How much is the temperature in 30000 feet? It could also put the aircraft in an unstable flight phase where a stall might be possible. The reference wind pressure q {\displaystyle q} is calculated using the following equation: q = 1 2 p v 2 {\displaystyle q={\frac {1}{2}}pv^{2}} where p {\displaystyle p} is the air density and v {\displaystyle v} is wind speed. Because the power in the wind has a cubic relationship to wind speed, a site with an average 15 mph wind speed contains nearly 100 percent more energy than a site with an average wind speed of 12 mph. Sem categoria. For Vancouver Island ( east side ) we can have winds from 0-45 kts but the norm is around 15-25kts waves from 1-6 feet norm 2-3 feet. 0 Comment; 7Jun. The weather balloon launched from Lincoln, Nebraska, observed record-high 250-millibar wind speeds Sunday night at 213 mph. The large range in costs is due to different types and heights of towers and variations in the amount of construction work required. 0 Comment; 7Jun. Since the current simulation is in 3DOF, only the effect of headwind is included. multitude of altitudes from the current time until multiple days in the See also: Six incredible planes you'll never get to fly on. ford fiesta steering wheel upgrade average wind speed at 30,000 feet Small wind turbines are typically installed between 15 and 40 m high. Although annual wind speed averages have gotten up to 15 mph in Fargo, the city's average from 1948 to 2014 was about 11.2 mph, North Dakota State University reported. Note: Beaufort cannot be entered because it would result in a range of numbers. In the Northern Hemisphere, the jet stream flows generally from west to east. It is important to avoid excessive loss of power from voltage drop in wire from the wind generator to the batteries. The maps also indicate two components of wind direction: U-wind represents the east-west component of wind and V-wind represents the north-south component. Hub heights of modern 600 to 1,500 kW wind turbines are usually 40 to 80 metres, however. Since most planes fly at jet-stream level (hence the term), the 200-plus-mph tailwind shaved time off some west-to-east flights across the United States. On Monday night, Pittsburgh, Pennsylvania (227 mph), and Albany, New York (229 mph), set record wind speeds for the 250-millibar pressure level, in addition to the 231-mph speed at Upton, New York, mentioned earlier. The Wind Speed Anomaly maps show where average wind speed was slower (blue) or faster (red) than the recent 30-year average. Areas with annual average wind speeds around 6.5 meters per second and greater at an 80-m height are generally considered to have a wind resource suitable for wind development. "Now, with the Radiosonde Replacement System GPS radiosondes (weather balloons), a complete and accurate wind profile can be measured for the entire sounding.". $ Since wind speed generally increases with increasing height, users should expect to see more frequent orange to red colors at high altitudes. 3. Change parameters. The maps also indicate two components of wind direction: U-wind represents the east-west component of wind and V-wind represents the north-south component. Altitude depends on the type of engines mounted on the plane. This site offers maps showing average monthly wind speed and direction for the contiguous United States from 1979 to the present. Areas with good exposure to prevailing winds and annual average wind speeds around 4 meters per second and greater at a 30-m height are generally considered to have a suitable wind resource for small wind projects. 1. But the height ranges from near 27,000 to 32,000 feet (8,200 to 9,600 meters). Marlene; Dec 15, 2019; I gave the CD as a birthday present. Here are the instructions how to enable JavaScript in your web browser. Answer (1 of 8): This question cannot be answered as written. The sky is clear with a chance of rain 20%. Vx and Vy are the calculated air speeds for the rates of climb for aircraft Vx is the best ANGLE of climb (resulting in the shortest distance from the runway), and Vy is the indicated airspeed for best RATE of V ector functions are used to average wind direction and can be used to compute a type. Average Rating 5.0 out of 5. The rule, however, requires to be modified after the first thousand miles. and But I'm up here with you tonight. 01/20/16 OBUTC 000HR FCST VALID WED 01/20/16 OBUTC NCEP/NHS/NOAA 940 884 150 876 130 110 go 90 -70 100 50 9700 160120/06OOYOOO GFS 300MB HEIGHTS. I have loved a pretty girl. Shows an animated visualization of forecasted wind speeds across the US and worldwide. The computer models that create these data typically have thousands I've done some more digging, and found a range of results that suggest average windspeeds at those latitudes and heights between 5 and 20 knots. Also, Boulder 91mph. Any tips would be appreciated. The direction of the wind is very obvious on the wind streamlines graphics, New Mexico Housing Market Insights. Airport Conditions for: Phoenix | Boston. Aircraft prefer life in the stratosphere, which means less turbulence. The Wind Speed Anomaly maps show where average wind speed was slower (blue) or faster (red) than the recent 30-year average. There is no maximum altitude for flying, however, engines will struggle as the oxygen levels fall, and communication with the ground will become a greater challenge. Falling from 30,000 feet, youre likely to reach terminal velocity at 190 km (118 miles) per hour. Trust that sometimes time is all you need to gain perspective. In 2012, Austrian Felix Baumgartner broke the sound barrier (with his body!) This maximum is also known as a 'service ceiling.'. To put it into context, the typical passenger of jet aircraft cruises at an altitude of 33 000 - 35 000 feet, at a speed of around 500 mph (depending on the aircraft type as well as on the wind . What Is the Difference Between Airspeed and Ground Speed? I can only assume that this is due to a change in wind velocity of the same magnitude. The Law of Love $ 15.99 $ 24.99. Average reading or listening time is 15 minutes a day. altitude of the airport is then 5016+3000=8016 feet above sea level. The records extend up to 2014, the last time the database was updated. See also: The world's 10 scariest airports to fly into. The average wind velocity ranges between 10 m/s to 20 m/s for an altitude between 3000 m and 8000 m [17]. The alternative Winds at jet-stream level, about 35,000 feet above the Earth's surface in winter, have been among the highest on record from the Southwest late last week to the Northeast early this week. By submitting your email you are agreeing to Nine Publishing's Wiring. You want to maintain equilibrium in straight and level flight at an altitude of 30,000 feet, cruising at 400 knots to conserve fuel. Loitering a drone at 65000 ft is just the beginning, even if it has the battery power needed to carry it through the night. Each airplane has an optimal cruising altitude range that is the best tradeoff of speed and fuel efficiency. Seemingly Small Things Booklet $ 3.49. A plane flying Mach 1.0 at sea level is flying about 1225 km/h (661 Knots, 761 mph), a plane flying Mach 1.0 at 30000 ft is flying 1091 km/h (589 knots, 678 mph) etc. Figure 1 shows the mean eyewall wind speed profile, where the wind at each level has been normalized by the wind speed at 700 mb (taken from the dropsonde profile, if available, or from the aircraft 700 mb flight-level wind at the time of launch, if not). to see much variation of temperature on the plot at FL360 where the Less wind resistance, more power, less effort, so to speak. Which is quite a variation, quite apart from excursions. A new wind speed record for the 250-millibar pressure level was set Sunday morning in Amarillo, Texas, at 199 mph. 1. During most of the year, users can easily locate the "jet stream" by viewing the chart around 36,000 feet (FL360) and finding the ribbon of fastest-moving air. North Carolina 80-Meter Wind Resource Map. Winds/Temps Plots Click on map for access to plots Winds/Temps Data Click on map to access text data for each region GiflHT CUNARD LINER QUEEN MARY GROSS WEIGHT 80,773 TONS HOST LUXURIOUS SHIP AFLOAT LONDON, March 24. and correct their course to account for changes in wind speed and direction. Rank within a Distance of a Point. Home. A. the speed of wind caused by the air B. the temperature of the air C. the An aircraft flies at an altitude of 30,000 feet. The term 30,000 foot view refers to the cruising altitude of an airplane. 36,000 C. 40,000 D. 50,000. of average wind speed which is In Canada, reference wind pressures are used in design and are based on the "mean hourly" wind speed having a probability of being exceeded per year of 1 in 50. Wind speeds over 99 knots are extracted by subtracting 50 from the direction and adding 100 to the speed. V ector functions are used to average wind direction and can be used to compute a type. Here's how it worked out, Bargain hunt: The 20 all-time best-value destinations, Six of the best airport locations to explore while you wait, There is no cure for jet lag. Normals were provided by the National Climatic Data Center in Asheville, NC. The aircraft's wing area is 1,140 square feet. atmosphere followed by an offset like "+5" meaning 5 degrees C higher airport at Fort Collins-Loveland, Colorado, (KFNL) which is located at 5016 and will be moving at a constant speed. Winds at jet-stream level over the New York City area exceeded 230 mph. Rate = 250km/h. Thanks to this weeks announcement, we have both. According to the U.S. Energy Information Administration, the average U.S. home uses 893 kilowatt-hours (kWh) of electricity per month.Per the U.S. Wind Turbine Database, the mean capacity of wind turbines that achieved commercial operations in 2020 is 2.75 megawatts (MW).At a 42% capacity factor (i.e., the average among recently built wind turbines in the 5/16/17. Easy Unit Converter Once we got above 14,000 feet the wind speeds didn't seem to change with altitude. The wind profile power law relationship is: u/ur = (z/zr)^a where; - u is the wind speed (in meters per second) at height z Both are part of the Integrated Enterprise Excellence (IEE) Business Management System he developed. Wind causes the plane to fly at 250km/h. $36.78. For wind speeds to use throughout the year in design, however, I'd think it would be best to use government data for the specific area I will be flying (Space Port America, in Truth and Consequences NM, in this case). Very educational. Science; Earth Sciences; Earth Sciences questions and answers; 12. density altitude deviation of 3000 feet on the graphic. Get a weather forecast and plan your outdoor activity with Windy.app: Explore live HD wind map with a 10 day wind direction and wind speed. A piston engine isnt at all efficient when the density of air is low. NEWS AND VIEWS. When the airplane is at an elevation of 30,000 feet, passengers can see a big-picture view of the landscape from a window. What is the average wind speed for my area? Shindaiwa 78890-30000 Speed-Feed 400 Universal Bump Feed Trimmer Head . But the plan also envisions this first stage unlock [ing] a pathway to 110 GW by 2050 Determine the air temperature (in [K]), air pressure (in [Pa]) and air density (in [kg/m3]) at this altitude, according to the standard atmosphere. In every mile after the first, the curvature downwards from the point T increases as the square of the distance multiplied by 8 inches. A diagram on the map shows a dominant wind direction and includes average data for every year. Our large helicopter section. It should be noted that, in the past, weather balloons sometimes missed the very highest winds in the atmosphere because the balloons were traveling so fast that they ended up too close to the horizon for location-tracking technology to keep track of them. Download The Bible from 30,000 Feet and enjoy it on your iPhone, iPad, and iPod touch. An aircraft flying through the jet stream reached a top speed of 801 mph Monday night. The average wind speed (mph) is based on the speed of the wind regardless of direction. 5/16/17. Strongest 29 October, 2021 118.4km/h WNW; 1 mile 5.33 ft. or .12626 mile. For each month and parameter, the tool shows the climatological mean wind (average over the previous three decades), observed winds, and wind anomaly (how much faster or slower wind blew compared to the long-term average for that month). Small wind turbines are typically installed between 15 and 40 m high. The wind at 3,000 ft AGL is close to the __ wind speed and blows ___ to the isobars. All of these records date back to when weather balloons were first launched on a regular basis in the 1940s and 1950s. altitudes. When we talk about wind, this is what's actually being measured. The average vertical depth of the troposphere is _____ feet. $39.97 $ 39. geostrophic, parallel. The air at a height of 30,000 feet is compressed to sea level pressures. Less wind resistance, more power, less effort, so to speak.