DEPARTMENT OF GEOSCIENCES             Name ____________________

San Francisco State University                      April 21, 2011                                   

Metr 201, Spring 2011

Monteverdi Quiz #2

100 pts.

Answer in complete sentences under the question or on the back of the exam.  Please write legibly.


A.   U.S.  Radar Coverage.  (10 points each for a total of 20 points in this section).


Refer to Figure 1 at the back of the test.


1.    The overlapping white circles on the map of the United States indicate what?  (10 pts)









2.    Why is there a grey area shown in eastern California extending into central Nevada? (10 pts)








B.   Radar Interpretation.  (30 points in this section). Refer to Figure 2 at the rear of the test , which shows the hook echo associated with the Springfield-Wilson, North Carolina tornadoes.


1.    The arrow labeled A refers to a bulbous extension of the hook. What is that bulbous extension called (5 pts) and what is its significance (10 pts)?


2.    The arrow labeled B refers to a red circle from which a line with time intervals are annotated extends. What does that circle represent (its name) (5 pts) and what is its significance significance (10 pts)?







C.   Satellite Interpretation.  Examine Figures 3 and 4 at the rear of the test, and note the locations shown at A,  B and C on both images. (35 points)


1.    Which of the three locations has the clouds that are most likely be towering the highest in the troposphere and why  (use both images for this)?  (15 pts)














2.    Here are the three cloud types that are occurring at either location A, B and C:  stratus, altocumulus, and cumulonimbus.  Insert these cloud names at their most likely location.  You may only use the cloud type once: (15 pts)


         Location A ________________


         Location B _________________


         Location C _________________






     3.  The temperature of the cloud tops at location B is approximately (5 pts)


(a)    10C

(b)   20C

(c)   -10C

(d)   -55C

(e)    0C


D.      Units. (3 pts each for a total of 15 pts)

         Provide the units used conventionally for the following:




                     ___________________________  *    







*= Theta


**PGA = Pressure Gradient Acceleration



Figure 1:  Radar Analysis for 1749 UTC 11 February 2005



Figure 2:  Reflectivity from the Tulsa Radar for 2026 UTC 4/16/2011


Figure 3:  Visible Satellite Image, 2145 UTC 14 April 2011

Figure 4:  Enhanced Infrared Satellite Image, 2145 UTC 14 April 2011