Visual Step 4
Determine System Trend


Compare current image to the image from 24 hours ago. 
Determine if the cloud features in the current image look better defined, the same or worse.
If better, the trend is Developed (D)
If the same, the trend is Same (S)
If worse, the trend is Weakened (W)

Go to Step 5 
Return to the top level VIS Dvorak Page
Return to main Dvorak Page
For More information, contact:
Paul  McCrone, Chief Forecaster
HQ Air Force Weather Agency (AFWA) 
Meteorological Satellite Applications
Office Code: XOGM
106 Peacekeeper Dr. STE 2N3
Offutt AFB, NE 68113-4039
Email:Paul.McCrone@afwa.af.mil
andPaulJMC@aol.com

WWW:
http://zephyr.unl.edu/~pmccrone
http://members.aol.com/PaulJMC/html
Phones:
COMM: (402) 294-2821
DSN: 271-2821
Fax:    (402) 294-5872



Many thanks to the University of Nebraska for hosting this page!