Department of Geosciences                                  Name______________________

San Francisco State University                             Spring 2011

Metr 201 Monteverdi Quiz #4

100 pts.

(45 min. Test will be collected at 10:20 AM)

 

1.    Definitions.  (5 points each for a total of 25 points in this section).

 

(a)          Convective Condensation Level --

 

 

 

(b)                  Convective Temperature --

 

 

 

(c)                  Lifted Index --

 

 

 

(d)                  wave cyclone --

 

 

 

(f)          dry line--

 

 

 

2. Symbols.  Provide the correct symbol (3 pts each for a total of 12 pts)

        

Example                              Acceleration of gravity               g

 

vertical wind component                                      ___________

                 

potential temperature                                           ___________

 

horizontal wind component along x-axis                 ___________

 

horizontal wind  component along y-axis                ___________

 

 

 

3. Severe Weather Chart and Parameter Interpretation (60 points)

 

Part I.  Essay Questions. 

 

A.   You are provided with the paired (a) CAPE/CIN charts;  (b) Visible Satellite Images;  and (c) radar reflectivity images for approximately 1700 UTC and 2200 UTC on 29 April 2010.  Note the locations labeled A and B. ( 20 pts).

 

Explain the differences in the satellite and radar presentation at locations A and B given the evolution of the CAPE/CIN field you see on the top chart. [Note:  this is an essay question.  It does not need to be long.  However, it needs to be written in proper English, NEATLY, with sentences that have a subject, verb and object]  (40 points)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B.  You are provided with the surface analysis at 01 UTC 30 April 2010.  Note the boundary indicated by the arrow.  It is the dry line. (20 points)

 

 

 

Examine the weather information on either side of the dry line.  Now briefly describe why that weather information is consistent with the fact that the dry line is analyzed in the location shown.  [Caution:  it is up to you to decide what weather information is consistent with the analyzed dry line.]

[Note:  this is a short answer question.  It does not need to be long.  However, it needs to be written in proper English, NEATLY, with sentences that have a subject, verb and object] 

 

 

 

 

 

 

 

Part 3.  Sounding Interpretation.  You are provided with the sounding for Atlanta, Georgia (KFFC) for 12 UTC 27 April, 2011. (23 points)

Your task is to transform the sounding to one that estimates conditions for afternoon heating. 

1.    Find the Convective Condensation Level, and the Convective Temperature (indicate on diagram)

2.    Draw the parcel ascent curve that would occur if the afternoon temperature. 

3.    Shade in the CAPE for the ascent curve that results.