Why is the mammatus cloud formation so dangerous?
Mammatus clouds are very gentle downdrafts, typically seen beneath the anvil or along the flanks of a thunderstorm, though they may also be occasionally seen under stratus and altostratus clouds. The reason for the udder-like shape is not well understood, though there are several interesting theories.
Why is the Cumulonimbus cloud formation so dangerous?
2015年7月8日 · There can also be very active in-cloud lightning as well as cloud-to-ground discharges. Threats near the storm are turbulence, lightning, large hail and significant downdrafts (e.g. microbursts). Threats within the cloud are severe turbulence, very strong updrafts (some as high as 100 m/s or more) and downdrafts containing torrential rain, hail ...
How can a pilot anticipate cloud formation? - Aviation Stack …
2017年2月19日 · When air starts to condense, and a cloud forms, this process releases latent heat. Simply put, it took energy to make the water evaporate, and this energy is released again when the water condenses. This means that once our bubble of rising air reaches the dew point, and a cloud starts to form, it will actually cool off slower.
Why is cloud base estimation taught in Fahrenheit?
2020年12月13日 · $$ \mathrm{cloud\:base} \approx \frac{(\mathrm{temperature\:°F})-(\mathrm{dewpoint\:°F})}{4.4\mathrm{°F}} \times 1000' $$ However, a METAR always gives temperature and dewpoint in Celsius, and pretty much everything else in aviation uses Celsius — even lapse rate, which is the basis for this formula, is taught as "2°C per 1000 feet".
weather - How can you identify the upwind side of a …
2017年5月25日 · The downwind portion of the thunderstorm is characterized by an anvil cloud. Typically the downwind side has a much higher probability of hail. It is not uncommon for anvil clouds to extend a hundred miles down wind from larger …
weather - Is there any way to determine or estimate where the …
There are various ways to find out or at least estimate where cloud bases are, e.g. ATIS/AWOS/ASOS report them directly, PIREPs may mention them, and you can make a rough estimate based on the temperature/dew point spread.
Highest scored 'weather' questions - Aviation Stack Exchange
2017年12月10日 · So the other day as I was flying, I started to wonder: All pilots should be familiar with basic VFR cloud clearance requirements in 14 CFR 91.155 (and if not, then go study now!). When flying piston ...
How do the FAR's define a cloud? - Aviation Stack Exchange
2017年2月23日 · A cloud is a visible aggregate of minute water droplets and/or ice particles in the atmosphere above the Earth’s surface. Fog differs from cloud only in that the base of fog is at the Earth’s surface while clouds are above the surface. Clouds are like signposts in the sky that provide information on air motion, stability, and moisture.
meteorology - How does pressure affect formation of clouds?
2021年11月24日 · But that doesn't mean you can't get any clouds. In fact fog, which is a cloud, basically needs high pressure in order to form, as well as a cool surface. On a hot day, the ground may be so warm that heated air 'pockets' can break through the sinking air and form cumulus clouds. Any mountain range will also force the air to rise and cool too.
What is the relationship between temperature, dew point and the ...
2016年12月14日 · The dew point is the temperature at which condensation (a cloud) forms. If the dew point is the same as the temperature on the ground, then there will be fog. The temperature usually decreases as the altitude increases. This is called the lapse rate. In general, the closer the dew point is to the ground temperature, the lower the cloud ceiling ...