Which of the following weather conditions favour the formation of radiation fog ?
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Over Central Europe what type of cloud cover is typical of the warm sector of a depression during winter ?
Of the four radio soundings select the one that indicates ground fog 255 ?
Which of following cloud types can project up into stratosphere Light wind little or no cloud moist air. cumulonimbus clouds are tallest clouds can reach to stratosphere the updraft in some strong cbs will bulge into stratosphere. 
What process in an air mass leads to creation of wide spread ns and as cloud coverage Light wind little or no cloud moist air. lifting a process leading to creation of thin nimbostratus altostratus cloud layer sinking will lead to dissipation of clouds radiation will also dissipate clouds or generate a convective activity will create cumulus clouds not ns or as. 
Which of following cloud classified as low level cloud Light wind little or no cloud moist air. . 
Which of following most likely to lead to dissipation of radiation fog A marked increase in wind velocity near ground. . Question 135-8
Which of following conditions most likely to lead to formation of steam fog arctic smoke Cold air moving over warm water. steam fog also known as steaming fog evaporation fog frost smoke or arctic sea smoke occurs when evaporation takes place into cold air lying over warmer water it named analogy with condensed vapor or steam which appears above water which heated invisible vapor given off from water but almost immediately recondensed as it comes into contact with colder air the air has to be much colder than water so that convection currents develop formation also requires that there is a marked surface temperature inversion in air before it moves over sea or inland water bodies so as to preclude lapse rate becoming unstable through a deep layer a low air temperature typically 0°c or below so that a comparatively small amount of moisture can produce supersaturation otherwise heating process will outweigh tendency towards saturation because of these requirements this type of fog usually only formed over water surfaces near to a source of cold air such as frozen ground or ice sheets in polar regions one classic occurrence following sudden break up of sea ice to expose relatively warm water in steep sided fjords along parts of icelandic norwegian coasts similar environments elsewhere steam fog may reach a depth of 500 feet or more drift over adjacent land areas whilst relatively rare in temperate latitudes cold air which collects in then drifts down large river valleys out over a relatively warm sea surface in very light wind conditions can occasionally lead to formation of smaller much shallower areas of this type of fog in winter. Question 135-9
The lowest cloud base forecast at eta zurich 1200 utc lszh 061019 20018g30kt 9999 ra sct050 bkn080 tempo 23012kt 6000 dz bkn015 bkn030 becmg 1518 23020g35kt 4000 ra ovc010= Cold air moving over warm water. lszh 061019 20018g30kt 9999 ra sct050 bkn080 tempo 23012kt 6000 dz bkn015 bkn030 becmg 1518 23020g35kt 4000 ra ovc010= the tempo group used any conditions in wind visibility weather or sky condition which are expected to last generally less than an hour at a time (occasional) are expected to occur during less than half time period at 1200 utc lowest cloud base forecast 1500 ft the most likely cloud base forecast will be 8000 ft (bkn080) between 1000 utc to 1500 utc note a cloud base few or sct a cloud ceiling bkn or ovc. Question 135-10
Extensive cloud and precipitation often associated with a non frontal thermal depression because of Surface convergence upper level divergence causing widespread ascent of air in depression. the cloud caused ascending air with divergence at height convergence at surface. Question 135-11
Which of following meteorological phenomenon indicates upper level instability which may lead to thunderstorm development Surface convergence upper level divergence causing widespread ascent of air in depression. the cloud caused ascending air with divergence at height convergence at surface. Question 135-12
Which type of fog likely to form when air having temperature of 15°c and dew point of 12°c blows at 10 knots over a sea surface having temperatures of 5°c Surface convergence upper level divergence causing widespread ascent of air in depression. advection fog warm moist air mass moving over a cold surface without too much wind radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air. Question 135-13
What type of fog most likely to form over flat land during a clear night with calm or light wind conditions Surface convergence upper level divergence causing widespread ascent of air in depression. radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air. Question 135-14
Which types of clouds are typical evidence of stable air conditions Surface convergence upper level divergence causing widespread ascent of air in depression. strat = stability. Question 135-15
Which one of displayed cloud forms representative of altocumulus lenticularis 295 Surface convergence upper level divergence causing widespread ascent of air in depression. strat = stability. Question 135-16
Which one of displayed cloud forms representative of a cumulonimbus capillatus 296 Surface convergence upper level divergence causing widespread ascent of air in depression. as cumulonimbus cloud grows in size it may turn into a cumulonimbus capillatus which means that it gains a fibrous edged top a clearly developed cumulonimbus capillatus displaying classic anvil shape. Question 135-17
A plain in western europe with an average height of 500 m 1600 ft above sea level covered with a uniform sc layer of cloud during summer months at what height above ground the base of this cloud to be expected 5 7 ft above ground. stratocumulus are low level clouds during summer months land warms up the cloud base goes up this the reason why sc will not be found below 1500 ft. Question 135-18
A plain in western europe with an average height of 500 m 1600 ft above sea level covered with a uniform cc layer of cloud during summer months at what height above ground the base of this cloud to be expected 5 35 ft above terrain. cirrocumulus (cc) are high level clouds the base of layer can be expected between 15000 ft up to 35000 ft. Question 135-19
Which of following cloud types found at high levels 5 35 ft above terrain. . Question 135-20
Which of following cloud types a medium level cloud 5 35 ft above terrain. . Question 135-21
Under which of these conditions radiation fog most likely to form 5 35 ft above terrain. radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air. Question 135-22
Which of following most likely to lead to formation of radiation fog Heat loss from ground on clear nights. radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air. Question 135-23
Of four radio soundings select one that indicates low stratus 298 Heat loss from ground on clear nights. when temperature dew point are equals air satured condensed water droplets will form cloud or fog (radio sounding n°2 indicates ground fog at surface) radio sounding n°3 indicates that a layer of cloud present above surface. Question 135-24
In which of following metar reports the probability of fog formation in coming night highest 2 85 z 5 3kt 6 sct 2 5/ 4 q 32 becmg 6 br=. light wind (below 5 kt) little or no cloud (clear night) only one degree between temperature dew point visibilty will fall from 6000 m to 1600 m br (mist) indicates moist air this conditions will lead to formation of radiation fog (moist air over land with heat loss from ground on clear nights). Question 135-25
Which airport most likely to have fog in coming night 302 2 85 z 5 3kt 6 sct 2 5/ 4 q 32 becmg 6 br=. radiation fogs occur at night usually do not last long after sunrise radiation fog common in autumn early winter (north hemisphere) radiation fog formed the cooling of land after sunset thermal radiation in calm conditions with clear sky the cool ground produces condensation in nearby air heat conduction in next 8 hours ekch engm essa will be covered the second perturbation arriving from west with winds rains clouds only zurich airport (lszh) will remains clear from bad weather area allowing radiation fog development. Question 135-26
Which of following cloud types are most likely to produce light to moderate icing when they are not subject to orographic lifting and consist of supercooled cloud droplets Altocumulus altostratus. cirrocumulus cirrostratus are high altitude clouds no supercooled cloud droplets cumulonimbus it produces light moderate severe icing it remains only 'alto altocumulus altostratus. Question 135-27
Altostratus clouds are classified as Altocumulus altostratus. . Question 135-28
A cumulonimbus cloud at mid latitudes in summer contains Ice crystals water droplets supercooled water droplets. . Question 135-29
Strongly developed cumulus clouds are an indication of Instability in atmosphere. . Question 135-30
Clouds classified as being low level are considered to have bases from The surface to 65 ft. . Question 135-31
Which of following are medium level clouds Altostratus altocumulus. . Question 135-32
Cumulus clouds are an indication Altostratus altocumulus. it means instability !. Question 135-33
A generally grey cloud layer with fairly uniform base and uniform appearance which may give drizzle or snow grains when s is visible through cloud outline clearly discernible sometimes it appears in form of ragged patches what type of cloud being described Altostratus altocumulus. it means instability !. Question 135-34
The presence of altocumulus castellanus indicates Instability in middle troposphere. it means instability !. Question 135-35
In an area of converging air in low level Clouds can be formed. divergence in upper air means convergence on ground this a low pressure area clouds may appears above it. Question 135-36
When temperature and dew point are less than one degree apart weather conditions are most likely to be Clouds can be formed. divergence in upper air means convergence on ground this a low pressure area clouds may appears above it. Question 135-37
The morning following a clear calm night when temperature has dropped to dewpoint likely to produce Clouds can be formed. radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air. Question 135-38
Advection fog can be formed when Warm moist air flows over a colder surface. advection fog warm moist air mass moving over a cold surface without too much wind radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air. Question 135-39
Steaming fog arctic sea smoke occurs in air With cold mass properties. steam fog also known as steaming fog evaporation fog frost smoke or arctic sea smoke occurs when evaporation takes place into cold air lying over warmer water it named analogy with condensed vapor or steam which appears above water which heated invisible vapor given off from water but almost immediately recondensed as it comes into contact with colder air the air has to be much colder than water so that convection currents develop formation also requires that there is a marked surface temperature inversion in air before it moves over sea or inland water bodies so as to preclude lapse rate becoming unstable through a deep layer a low air temperature typically 0°c or below so that a comparatively small amount of moisture can produce supersaturation otherwise heating process will outweigh tendency towards saturation because of these requirements this type of fog usually only formed over water surfaces near to a source of cold air such as frozen ground or ice sheets in polar regions one classic occurrence following sudden break up of sea ice to expose relatively warm water in steep sided fjords along parts of icelandic norwegian coasts similar environments elsewhere steam fog may reach a depth of 500 feet or more drift over adjacent land areas whilst relatively rare in temperate latitudes cold air which collects in then drifts down large river valleys out over a relatively warm sea surface in very light wind conditions can occasionally lead to formation of smaller much shallower areas of this type of fog in winter. Question 135-40
Frontal fog most likely to occur In advance of a warm front. the passage of a warm front can be associated with areas of fog the types of fog just in advance of a warm front frontal fog just after passage advection fog frontal fog caused the additional moisture in air due to evaporation of rain or drizzle the different types of fog radiation fog forms due to surface cooling at night in a light wind steaming fog the same as arctic smoke or sea smoke is caused cold air moving over a warm surface advection fog forms when warm humid air flows over a cold surface frontal fog most likely to occur in advance of a warm front it due to rain falls from warm air into cold air.
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