Pressure and Wind
Mid-latitude Cyclones
Atmospheric Stability
Skew-T Log P
Stability Indicies
100
If the height of the 500mb surface is 5400 m and the height of the 1000mb surface is 60 m, what is the 1000-500mb thickness?
534 dam
100
Wind direction will typically be from the _________ ahead of a warm front (cold side).
northeast
100
Which ELR(s) is/are stable?
3,4
100
The red lines represent the __________ on the above skew-T diagram.
dry adiabat
100
The shaded region represents CAPE. CAPE is associated with ______________ buoyancy.
positive
200
You're flying at 10,000ft (approximately 700 mb) in the northern hemisphere. Your airspeed is 190 kts and your ground speed is 130 kts. There is no observed cross wind (i.e., the winds are exactly parallel to your direction of flight). In this case, low pressure will most likely be found:
to your right
200
Which of the below represents a stationary front?
3
200
A saturated and an unsaturated parcel both have a temperature of 30C at the surface. If both of these parcels are forced to rise to an altitude of 1 km, which parcel will have the colder temperature at 1 km?
Unsaturated
200
Which lines represent temperature on the skew-T below?
gray right diagonal
200
A __________ Lifted Index is associated with a chance of thunderstorms.
Negative
300
What is the wind direction at point B?
Northwest
300
What local wind circulation is responsible for thunderstorms over the Florida Peninsula?
Sea Breeze
300
Referring to the table above, City _____ has the greatest water vapor content and city _____ has the greatest relative humidity.
C; A
300
What is the temperature of the parcel at 450 mb?
-5C
300
All else equal, a sounding with a small dewpoint depression at 700 mb will result in a(n) _____ K index compared to a sounding with a large dewpoint depression at 700 mb.
Hint: Recall that the K-index is calculated as:
K = Temperature850 - Temperature500 + Dewpoint850 – ( Temperature700 - Dewpoint700)
larger
400
The "thermal wind" relationship tells us that winds will _________ with height above regions separating cold and warm air masses.
increase
400
What kind of weather would you expect at location C?
Mix Likely
400
What time of day is the atmosphere most stable?
Early morning
400
Which of the following is a snow sounding?
A
400
What is the lifted Index? Recall that LI = Tenv - Tparcel at
between -14 and -11
500
Which of the following is the correct display of a southern hemisphere high?
C
500
What precipitation type would you expect at location C?
Snow
500
In a conditionally unstable atmosphere, an unsaturated parcel is ______________.
stable/colder/sink
500
What is the level of the level of free convection?
700 mb
500
A negative K index indicates there is a ______ probability that thunderstorms will develop.
low