Dvorak Pattern and Trend

Exercises

Objective: To determine cloud patterns

and 24 hour development trends of the

following examples of tropical weather

systems.

Clicker Instructions

A) Developing Trend (D)

B) Weakening Trend (W)

C) Steady – No Trend (S)

Pattern and Trend Exercise 1

5.5-24 hr

WNow

Curved Band or CDO

4.5 4.5

24 hr old FT=5.5 (Eye)

Pattern and Trend Exercise 2

3.5-24 hr

DNow

Curved Band

4.5 4.5

24 hr old FT=3.5 (Curved Band)

Pattern and Trend Exercise 3

3.0-24 hr

WNow

Shear

3.0 2.0

24 hr old FT=3.0 (Crv. Band)

Pattern and Trend Exercise 4

2.0-24 hr

WNow

Curved Band or Shear (?)

1.5 1.0

24 hr old FT=2.0 (Crv. Band)

Pattern and Trend Exercise 5

2.0-24 hr

DNow

Curved Band or CDO (?)

3.5 3.0

24 hr old FT=2.0 (Crv. Band)

Pattern and Trend Exercise 6

3.0-24 hr

DNow

CDO (?)

4.5 4.0

24 hr old FT=3.0 (CDO/Shear)

Pattern and Trend Exercise 7

? ? D S or W

Pattern and Trend Exercise 8

3.0-24 hr

WNow

Shear

1.5 2.0

24 hr old FT=3.0 (Shear)

Pattern and Trend Exercise 9

2.0-24 hr

DNow

Curved Band

3.0 3.0

24 hr old FT=2.0 (Curved Band)

Pattern and Trend Exercise 10

3.5-24 hr

DNow

Curved Band, Eye, CDO

4.5 4.5

24 hr old FT=3.5 (Crv. Band)

Pattern and Trend Exercise 11

3.0-24 hr

WNow

Shear

3.0 2.0

24 hr old FT=3.0 (Curved Band)

Pattern and Trend Exercise 12

5.0-24 hr

DNow

Eye

6.0 6.0

24 hr old FT=5.0 (Eye)

Pattern and Trend Exercise 13

24 hr old FT=3.5 (Curved Band)

3.5

D 4.5

Eye

4.0

-24 hr

Now