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At the top of orographic waves in mountainous regions the cloud most likely to ? [ Revision flight ]

Question 137-1 : Altocumulus lenticularis cirrostratus cirrus cumulus mediocris

exemple 237 Altocumulus lenticularis. — Admin . 433. 2540 Altocumulus lenticularis.

A cumulus congestus is ?

Question 137-2 : A cumulus that is of great vertical extent a remnant of a cb a cumulus with little vertical development a cumulus that only occurs in association with the itcz

Clouds in patches sheets or grey or whitish layers made up of elements ?

Question 137-3 : Stratocumulus stratus altostratus nimbostratus

exemple 245 Stratocumulus. — Admin . 597 Stratocumulus.

In mid latitudes the tops of cumulus are often limited by ?

Question 137-4 : A temperature inversion a layer of unstable air a radiation inversion the tropopause

Admin .their growth is usually limited by a temperature inversion which is marked by the unusually uniform height of the clouds also called fair weather cumulus

Of what does lenticular cloud provide evidence ?

Question 137-5 : Mountain waves jet streams stratospheric inversions areas of high level clear air turbulence

exemple 253 Mountain waves. — Mountain waves.

The formation of morning fog before sunrise is possible if ?

Question 137-6 : Air temperature and dew point are equal or close to one another the wind is strong the sky is overcast the turbulence in the lower layers is moderate

exemple 257 Air temperature and dew point are equal or close to one another. — Air temperature and dew point are equal or close to one another.

What is the difference between radiation fog and advection fog ?

Question 137-7 : Radiation fog forms due to surface cooling at night in a light wind advection fog forms when warm humid air flows over a cold surface radiation fog forms only on the ground advection fog only on the sea radiation fog forms due to night cooling and advection fog due to daytime cooling radiation fog is formed by surface cooling in a calm wind advection fog is formed by evaporation over the sea

exemple 261 Radiation fog forms due to surface cooling at night in a light wind. advection fog forms when warm humid air flows over a cold surface. — Admin .radiation fog forms due to surface cooling at night in a light wind .steaming fog is the same as arctic smoke or sea smoke and is caused by cold air moving over a warm surface .advection fog forms when warm humid air flows over a cold surface .frontal fog is most likely to occur in advance of a warm front it is due to the rain falls from the warm air into the cold air Radiation fog forms due to surface cooling at night in a light wind. advection fog forms when warm humid air flows over a cold surface.

When fog is reported the visibility is below ?

Question 137-8 : 1 km 0 8 km 1 5 km 3 km

exemple 265 1 km. — Admin .mist is defined as visibility between 1 and 5 kilometers .below 1 km we talk about fog 1 km.

When visibility is reduced by water droplets to less than 1000 metres it is ?

Question 137-9 : Fog dust fog drizzle mist

exemple 269 Fog. — Admin .mist is defined as visibility between 1 and 5 kilometers .below 1 km we talk about fog Fog.

Which cloud type may indicate the presence of severe turbulence ?

Question 137-10 : Altocumulus lenticularis stratocumulus nimbostratus cirrocumulus

exemple 273 Altocumulus lenticularis — Altocumulus lenticularis

Which is true of advection fog ?

Question 137-11 : It can appear suddenly by day or by night it develops slowly and clears fast it forms when unstable air is adiabatically cooled it usually forms by night and clears by day

exemple 277 It can appear suddenly by day or by night. — Admin .advection fog forms when warm humid air flows over a cold surface so it can appear suddenly by day or by night when a warm front is coming .radiation fog forms due to surface cooling at night in a light wind .steaming fog is the same as arctic smoke or sea smoke and is caused by cold air moving over a warm surface .advection fog forms when warm humid air flows over a cold surface .frontal fog is most likely to occur in advance of a warm front it is due to the rain falls from the warm air into the cold air It can appear suddenly by day or by night.

Which of the following sets of conditions are most likely to lead to the ?

Question 137-12 : A mild moist airstream flowing over colder surfaces with the wind speed less than 15 kt clear skies at night over an inland marshy area a mild moist airstream flowing over colder surfaces with a wind in excess of 30 kt cold maritime air flowing over a warmer land surface at a speed greater than 15 kt

exemple 281 A mild moist airstream flowing over colder surfaces with the wind speed less than 15 kt. — Admin .advection fog forms when warm humid air flows over a cold surface as wind speed increases there is more likelihood of turbulence cloud forming .advection fog forms when warm humid air flows over a cold surface .radiation fog forms due to surface cooling at night in a light wind .steaming fog is the same as arctic smoke or sea smoke and is caused by cold air moving over a warm surface .frontal fog is most likely to occur in advance of a warm front it is due to the rain falls from the warm air into the cold air A mild moist airstream flowing over colder surfaces with the wind speed less than 15 kt.

Which of the following types of cloud can extend over the low medium and high ?

Question 137-13 : Cb ac st ci

exemple 285 Cb. — Admin . 503 Cb.

Which of the following types of clouds are evidence of unstable air conditions ?

Question 137-14 : Cu cb st cs sc ns ci sc

exemple 289 Cu, cb. — Cu, cb.

Which type of fog can not be formed over water ?

Question 137-15 : Radiation fog advection fog arctic smoke frontal fog

exemple 293 Radiation fog. — Admin .radiation fog forms due to surface cooling at night in a light wind .steaming fog is the same as arctic smoke or sea smoke and is caused by cold air moving over a warm surface .advection fog forms when warm humid air flows over a cold surface .frontal fog is most likely to occur in advance of a warm front it is due to the rain falls from the warm air into the cold air Radiation fog.

Stratus formed by turbulence will occur when ?

Question 137-16 : In the friction layer mixing occurs by turbulence and the condensation level is situated below the top of the turbulent layer the wind speed is less than 10 kt and the air is heated by the earth's surface the wind speed is greater than 10 kt and the condensation level is situated just above the turbulent layer absolute instability exists at low level

exemple 297 In the friction layer mixing occurs by turbulence and the condensation level is situated below the top of the turbulent layer. — Admin .turbulence cloud is formed within the turbulence layer because mixing of the air modifies the temperature In the friction layer mixing occurs by turbulence and the condensation level is situated below the top of the turbulent layer.

Radiation fog most frequently occurs in ?

Question 137-17 : High pressure systems over land low pressure systems over sea high pressure systems over sea low pressure systems over land

exemple 301 High pressure systems over land. — High pressure systems over land.

What kind of fog is often observed in the coastal region of newfoundland in ?

Question 137-18 : Advection fog frontal fog radiation fog steaming fog

exemple 305 Advection fog. — Admin .advection of warm air over a cold surface => the air will cool by bellow ==> advection fog .indication = coastal region .warm and moist air from the sea is traveling over the cold surface of the coast => advection fog Advection fog.

Which statement is correct ?

Question 137-19 : Fog can be supercooled and can also contain ice crystals mist and haze consist of water droplets fog and haze do not occur in the tropics mist and haze only differ by different values of visibility

exemple 309 Fog can be supercooled and can also contain ice crystals. — Fog can be supercooled and can also contain ice crystals.

The cloud type most applicable to square 3c is . 355 ?

Question 137-20 : Ns cb ac as

exemple 313 Ns. — Admin . 559 Ns.

The cloud type most applicable to square 2d is . 356 ?

Question 137-21 : As cu cb cs

exemple 317 As. — Admin .square 2d 7000 ft to 18000 ft. 622.the most applicable cloud type are ns and as As.

The cloud most likely to be experienced in square 1e is . 357 ?

Question 137-22 : Ci ac as cb

exemple 321 Ci. — Admin .the magic drawing . 622.we can exclude ac and as above 18000 ft cb will be met after a cold front Ci.

If radiation fog forms on a clear night with light winds the increase in wind ?

Question 137-23 : Cause the fog to lift and become low stratus change the radiation fog to advection fog have no effect disperse the fog immediately

exemple 325 Cause the fog to lift and become low stratus. — Cause the fog to lift and become low stratus.

Clouds will mainly consist of supercooled water droplets when the temperature is ?

Question 137-24 : Between 0°c and 15°c between 5°c and 30°c between 30°c and 40°c below 40°c

exemple 329 Between 0°c and -15°c. — Between 0°c and -15°c.

Frontal fog can be formed by ?

Question 137-25 : Condensation of air saturated by evaporation of precipitation condensation of air saturated by adiabatic cooling cooling at night evaporation of moisture at the surface

exemple 333 Condensation of air saturated by evaporation of precipitation. — Condensation of air saturated by evaporation of precipitation.

Advection of very cold air over a warm sea current can cause ?

Question 137-26 : Steaming fog advection fog no fog at all frontal fog

exemple 337 Steaming fog. — Admin .steaming fog is the same as arctic smoke or sea smoke and is caused by cold air moving over a warm surface .radiation fog forms due to surface cooling at night in a light wind .advection fog forms when warm humid air flows over a cold surface .frontal fog is most likely to occur in advance of a warm front it is due to the rain falls from the warm air into the cold air Steaming fog.

As a result of diurnal variation radiation fog is lifted and a cloud cover is ?

Question 137-27 : Low stratus will develop caused by increasing wind speed low stratus will develop caused by radiation in combination with low geostrophic wind speed layers of altocumulus will develop caused by increasing wind speed stratocumulus will develop caused by insolation

exemple 341 Low stratus will develop caused by increasing wind speed. — Admin .radiation fog occurs over land most commonly inland on clear moist nights when the wind speed is less than about 5 kt it forms after sunset as the wet ground begins to cool producing condensation in the nearby air .morning solar radiation heats the ground this generates increasing wind above the radiation fog entrains drier air and accelerates the dissipation .note in summer radiation fog layers are most often thin due to short nights in the winter however under stationary synoptic situations radiation fog can last for days Low stratus will develop caused by increasing wind speed.

In which situation is advection fog most likely to form ?

Question 137-28 : An air mass moving inland from the coast in winter a warm moist air mass on the windward side of the mountains a light breeze blowing colder air out to sea warm moist air settling over a warmer surface under no wind conditions

exemple 345 An air mass moving inland from the coast in winter. — Admin .this mass of air is relatively warm and full of moisture will be cooled by bellow by contact with the inland cold ground condensation will occur and advection fog will be created An air mass moving inland from the coast in winter.

About ten identical clouds are in the sky well isolated from one another dense ?

Question 137-29 : Towering cumulus broken cumulus altocumulus castellanus stratocumulus

exemple 349 Towering cumulus. — Towering cumulus.

Which of the following cloud types is classified as low level cloud ?

Question 137-30 : Sc as ac cs

exemple 353 Sc. — Cqb15 july 2011 .sc stratocumulus low level .cs cirrostratus high level .as altostratus medium level .ac altocumulus medium level Sc.

Which of the following cloud types is found at high level ?

Question 137-31 : Cs sc ac st

exemple 357 Cs. — Cqb15 july 2011 .cs cirrostratus high level .sc stratocumulus low level .st stratus low level .ac altocumulus medium level . 503. Cs.

Which one of the displayed cloud forms is representative of a cumulus . 375 ?

Question 137-32 : 1 2 3 4

exemple 361 1. — Cqb15 august 2011 1.

Which one of the following cloud types can be characterised by the optical ?

Question 137-33 : Cirrostratus altocumulus cumulonimbus nimbostratus

exemple 365 Cirrostratus. — Admin . 635.they are produced by the ice crystals in cirrus clouds high the particular shape and orientation of the crystals is responsible for the type of halo observed light is reflected and refracted by the ice crystals and may split up into colors because of dispersion the crystals behave like prisms and mirrors refracting and reflecting sunlight between their faces sending shafts of light in particular directions Cirrostratus.

Which cloud type genus is described by the following definition .'greyish or ?

Question 137-34 : Altostratus cirrostratus stratus stratocumulus

exemple 369 Altostratus. — Admin . cirrus ci detached clouds in the form of white dedicate filaments or white or mostly white patches or narrow bands these clouds have fibrous hair like appearance or a silky sheen or both . cirrocumulus cc thin white patch sheet or layer of cloud without shading composed of very small elements in the form of grains ripples etc merged or separate and more or less regularly arranged most of the elements have an apparent width of less than one degree . cirrostratus cs transparent whitish cloud veil of fibrous hair like or smooth appearance totally or partly covering the sky and generally producing halo phenomena . altostratus as greyish or bluish cloud sheet or layer of striated fibrous or uniform appearance totally or partly covering the sky and having parts thin enough to reveal the sun at least vaguely as through ground glass altostratus cloud does not show halo phenomena . altocumulus ac white or grey or both white and grey patch sheet or layer of cloud generally with shading composed of laminae rounded masses rolls etc which are sometimes partly fibrous or diffuse and which may or may not be merged most of the regularly arranged small elements usually have an apparent width of between one and five degrees . nimbostratus ns grey cloud layer often dark the appearance of which is rendered diffuse by more or less continuously falling rain or snow which in most cases reaches the ground it is thick enough throughout to blot out the sun . stratocumulus sc grey or whitish or both grey and whitish patch sheet or layer of cloud which almost always has dark parts composed of tessellations rounded masses rolls etc which are non fibrous except for virga and which may or may not be merged most of the regularly arranged small elements have an apparent width of more than five degrees . stratus st generally grey cloud layer with a fairly uniform base which may give drizzle ice prisms or snow grains when the sun is visible through the cloud its outline is clearly discernible stratus does not produce halo phenomena except possible at very low temperatures . cumulus cu detached clouds generally dense and with sharp outlines developing vertically in the form of rising mounds domes or towers of which the bulging upper parts often resembles a cauliflower the sunlit parts of these clouds are mostly brilliant white their base is relatively dark and nearly horizontal . cumulonimbus cb heavy and dense cloud with a considerable vertical extent in the form of a mountain or huge towers at least part of its upper portion is usually smooth or fibrous or striated and nearly always flattened this part often spreads out in the shape of an anvil or vast plume under the base of this cloud which is often very dark there are frequently low ragged clouds ether merged with it or not and precipitation sometimes in the form of virga .alto means height or upper air in meteorological context = medium level .cirro from which cirrus is obtained means 'wisp of hair' .cumulo from which cumulus is obtained means 'heap' clouds with this designator appear to be piled up these type clouds form in unstable layers of air the initial lifting may be due to convective lifting or forced mechanical lifting such as orographic frontal or convergence lifting if the layer is unstable the air parcel will continue to rise producing a cumulo form cloud .nimbo means 'rain' thus nimbostratus and cumulonimbus are clouds from which precipitation occurs .strato from which stratus is obtained means 'layer' or 'layered' clouds with this designator form in stable layers of air except the stratocumulus type which forms in a thin unstable layer of air Altostratus.

What cloud type can produce freezing rain ?

Question 137-35 : Nimbostratus stratus cumulonimbus stratocumulus

exemple 373 Nimbostratus. — Img505 Nimbostratus.

Frontal fog is most likely to dissipate ?

Question 137-36 : After the passage of a warm front in advance of a warm front when the wind decreases when the wind veers

exemple 377 After the passage of a warm front. — Admin .the question asks for 'dissipation' of the frontal fog not how it occurs .frontal fog is likely to occur in advance of a warm front due to rain falls from warm air to cold air .frontal fog is most likely to dissipate after the passage of a warm front After the passage of a warm front.

Which of the following situations will most likely lead to a stable air mass ?

Question 137-37 : Subsidence and/or cooling from below cold air at higher levels and advection of warm air at lower levels widespread convection decreasing wind and developing showers

exemple 381 Subsidence and/or cooling from below. — Subsidence and/or cooling from below.

Which cloud species is described by the following definition 'clouds which ?

Question 137-38 : Castellanus calvus fractus congestus

exemple 385 Castellanus. — Castellanus.

Which of the following processes contributes to the formation of frontal fog ?

Question 137-39 : Rain falls from the warm air into the cold air very cold air flows over much warmer sea moist air flows over land during a clear night maritime polar air flows over a warm ground

exemple 389 Rain falls from the warm air into the cold air. — Rain falls from the warm air into the cold air.

Which cloud species is described by the following definition .'cumulonimbus ?

Question 137-40 : Capillatus calvus fractus congestus

exemple 393 Capillatus. — As the cumulonimbus cloud grows in size it may turn into a cumulonimbus capillatus which means that it gains a fibrous edged top . 640.a clearly developed cumulonimbus capillatus displaying the classic anvil shape Capillatus.

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