Questions tagged [meteorology]

The study of the weather, especially important for aviation purposes.

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3
votes
1answer
93 views

How does ceiling relate to IFR and VFR?

I'm working on a Python script that takes in metar data and decides if an airport is VFR/IFR/MVFR etc. This is the website that I'm getting the info from: https://www.aviationweather.gov/metar/data?...
9
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3answers
228 views

What would the altimeter indication be through a cold front?

Cold air is heavier than hot air because of its greater density, so the QNH of an airport inside a cold front would be higher. Flying towards the cold front would be, "low to high, hello sky". But I ...
0
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1answer
55 views

Are cirrus clouds stratiform?

Cirrus clouds: Are they warmer than the environment? - Cumuliform. Or are they cooler? - Stratiform What differences do cirrus clouds have to the "Cirro" versions of a cumulus or stratus?
13
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1answer
2k views

What is wind “CALM”?

What is the exact criteria for wind speed to be considered "CALM". Different countries might have different values and i do not mind getting answers from those. But an answer from an ICAO annex would ...
3
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1answer
78 views

Is the “PROB” in a TAF only applying to the next group or all following ones?

Let's assume I have a TAF that reads: [...] PROB40 TEMPO 0815/0822 5000 -SHSN BKN008 OVC015 TEMPO 0822/0909 1000 SN VV003 BECMG 0902/0904 16012KT Which of the <...
1
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1answer
96 views

Does heavy air pollution improve takeoff performance?

As you all probably know by now, aircraft have much better takeoff performance when and where the air is denser; this is why flights need to either use longer runways or jettison passengers and cargo ...
3
votes
1answer
101 views

How do barometric altimetry systems compensate for nonstandard pressure lapse rates?

Barometric altimetry relies on atmospheric pressure dropping at a steady rate with altitude, starting from a measured ground-level pressure. This, in turn, relies on atmospheric density dropping at a ...
8
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2answers
413 views

Can pilots tell if a cloud or fog is made out of water droplets or ice crystals when flying through it?

I understand that clouds can be made out of water droplets or ice crystals. And that fog is nothing else than low-lying clouds. However, I've experienced fog in a wide ranges of temperatures. I like ...
5
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3answers
589 views

What’s the setting range altimeters can handle?

What’s the setting range altimeters can handle? Is there a standard requiring a certain range for aircraft to be certified? Are there many occasions where a QNH is so high or low that airplanes have ...
1
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1answer
2k views

What is the difference between microburst and windshear?

When I read about these weather phenomena, I find that both of them depict the same thing, and have the same actions to avoid. So why are they differentiated? http://www.myairlineflight.com/windshear....
3
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2answers
202 views

Is the size of hail on the ground any indication of the winds and updrafts of a thunderstorm?

Is there any rule of thumb or way to estimate the wind speeds or up and down drafts inside a storm by the size of hail that reaches the ground?
3
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2answers
2k views

Icing conditions temperature range: SAT or TAT?

Considering the general rule of thumb defining potential icing conditions: temperature between +10 and -40 degrees C and presence of visible moisture, is the temperature range regarding TAT (total ...
10
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5answers
3k views

Why on weather surface charts high pressure is blue and low pressure is red?

Is there any relation with the temperature of the air or is it just a standard procedure?
0
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0answers
100 views

How do subjective experiences in the airliner cabin correlate with meteorological conditions?

There must be a better way of phrasing this, but: given the passenger's experience of riding through the air, what are the outside conditions that are responsible for that experience? For example, if ...
6
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1answer
257 views

What is the physical definition of turbulence?

To aviators, the definition of turbulence by measuring the results is widely known: example. But if we were to generate a turbulence forecast as a meteorologist, there need to be some kind of physical ...
5
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2answers
4k views

How should I interpret this TAF involving TEMPO and BECMG blocks?

with the reference in the TAF below , I was looking for the VIS at 0500 UTC and I was little bit confused because of the " TEMPO " And the TAF was ...
10
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1answer
166 views

To what extent are (non-urgent) PIREPs used by meteorologists?

It's inevitable. At some point during your weather briefing, some underpaid, underappreciated briefer will say "Pilot reports are requested." and you'll say "Certainly, my good sir or madam! Why, the ...
5
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1answer
2k views

How do pilots clear an aircraft to fly through a hurricane?

This video shows a pilot (Tim Gallagher/NOAA) flying what looks like a small jet into the eye of hurricane Matthew by Miami. It's clear that it is quite an interesting ride. The (small) caption states ...
1
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1answer
859 views

Is there much turbulence in the Doldrums?

A place over the equator called the Doldrums are know for the severe lack of sailing winds. In the atmosphere above it is there any presence of turbulence anywhere? Where would the least year round ...