ERAU World Wide WEAX 201 Final Exam Summer 2009 NAME 1 20 If we consider an upper level trough as seen in the diagram below EXPLAIN AND DRAW where and how the surface low and high pressure systems form On the surface diagrams please draw in the forces and use them to DISCUSS why the winds circulate the way they do Upper Air Surface Wind s initial path L H Wind s initial path 2 5 Name the 5 fronts and give their definitions 3 SEVERE WEATHER 10 The radar image below is a classic severe thunderstorm Name it and describe and draw its formation from cumulus stage at the beginning to dissipation 3b 4 What are the conditions necessary for severe weather formation Of those conditions which is most important in the formation of a tornado 3c 2 The above storm was associated with an F4 tornado What is the F scale How are tornadoes rated and why is this scale inaccurate 4 3 a What is a Mid Latitude cyclone 4b 6 In the diagram below draw the position of the low the cold and warm front Describe the following conditions in North Carolina 1 Cloud types that would be present 2 Wind direction in N S E W 3 Weather precipitation temperature humidity MULTIPLE CHOICE fill in the blanks with the correct answer 1 In the mature stage of a mid latitude cyclone the following conditions are present a Pressure is dropping b Counterclockwise motion is beginning c Clockwise motion is beginning d Pressure is rising e Both a and b 2 If pressure is lowering at the surface the wind are at the surface and in the upper levels a Converging diverging b Diverging converging c Converging converging d Diverging diverging e Sinking sinking 3 The formation of a mid latitude cyclone is called a Low pressure genesis b Anticyclogensis c Cyclogenesis d Convergence e Conditional instability 4 Non severe weather has the following conditions a Lightning and thunder b Heavy rain c A and b d Strong vertical wind shear e A b d 5 The following is a non severe thunderstorm a an airmass thunderstorm b a frontal squall line c a mesoscale convective system d a supercell e none of the above 6 A supercell storm a Is the most violent thunderstorm b Rotates counterclockwise on its own c Does not require strong vertical wind shear d All of the above e Both a and b 7 A mesoscale convective system requires a Heat b Moisture c Conditionally unstable environment d Strong vertical wind shear e All of the above 8 An airmass thunderstorm forms initially by a Frontal lifting b Surface heating c Collision Coalescence d All of the above e None of the above 9 Which of the following types of tornadoes would you find in a non severe storm a F0 F1 b F2 F3 c F4 F5 d All of the above e None of the above 10 A tornado forms a from the bottom up b from a mesocyclone c due to strong vertical wind shear d from the top down e all of the above 11 Lightning occurs due to positive charges in the bottom portion of clouds meeting negative charges from the ground a True b False 12 On Friday night a tornado warning was issued for Okaloosa County this means that a the conditions were present for tornadic activity b a tornado was spotted in Santa Rosa County c A possibility of tornadoes d A tornado was spotted in Okaloosa County e None of the above 13 Tropical disturbances can form in which of the following environments a old frontal boundaries b easterly waves c thunderstorms d all of the above e only a b 14 An easterly wave causes a tropical disturbance because of a convergence on the west side of the trough b rising motion on the west side of the trough c convergence east of the trough axis d both a b e both b c 15 Heat is supplied to a hurricane by a latent heat release b warm Sea Surface Temperatures c Warm rain d Only a b e All of the above 16 Latent heat release happens when a water evaporates off the ocean b water vapor condenses in the atmosphere c sinking motion causes the air to clear d warmth from the ocean is transferred to the atmosphere e none of the above 17 A tropical disturbance is defined as a an unorganized cluster of thunderstorms b a storm having winds between 0 20 kts 0 24mph c both a b d a storm having low pressure and an eye e all of the above 18 A tropical depression a occurs when there is an identifiable drop is surface pressure b occurs when the winds are between 34 63 kts 39 73mph c is assigned a name d is an unorganized cluster of thunderstorms e both a c 19 A tropical storm a is assigned a number b is assigned a name c have winds between 64 82kts 74 95mph d has a center of low pressure e both b d 20 Once a storms wind speeds reach 74 mph 64kts it a is a hurricane b is classified by the Saffir Simpson Scale c has a well defined eye d both a b e all of the above 21 A hurricane having wind speeds between 96 113 kts 111 130mph is considered a a Cat 1 storm b Cat 2 storm c Cat 3 storm d Cat 4 storm e Cat 5 storm 22 A hurricane having wind speeds between 114 135 kts 131 155mph is considered a a Cat 1 storm b Cat 2 storm c Cat 3 storm d Cat 4 storm e Cat 5 storm 23 In order for a tropical disturbance to increase in intensity the following conditions must be present c high tide Low pressure Warm SSTs and High pressure aloft d weak wind shear wave height high tides high winds warm SSTs e High relative humidity Warm SSTs High pressure aloft weak wind shear vorticity max f all of the above g none of the above 24 80 of all lightning is called a cloud to ground lightning b cloud to cloud lightning c sheet lightning d both a c e both b c 25 The force that generates wind is a coriolis force b friction c pressure gradient force d gravity force e centrifugal force 26 Which of these factors influence the magnitude of the Coriolis Force a wind speed b longitude c wind direction d centrifugal force e temperature 27 Lines on a weather map connecting places of equal air pressure are called a isogrids b isovectors c isotherms d isobars e isopressures 28 Tightly packed isobars often indicate a high wind speeds b low wind speeds c cold temperatures d cyclonic winds e small pressure gradient 29 A weak pressure gradient indicates a low wind speeds b high wind speeds c loosely spaced isobars d tightly spaced isobars e both a c 30 The Coriolis force influences a only wind speed b only wind direction c both wind …
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