Dvorak technique

The Dvorak technique (developed in 1974 by Vernon Dvorak) is a widely used system to subjectively estimate tropical cyclone intensity based solely on visible and infrared satellite images. Several agencies issue Dvorak numbers for cyclones of sufficient intensity. These include the National Hurricane Center's Tropical Analysis and Forecast Branch (TAFB), the NOAA/NESDIS Satellite Analysis Branch (SAB), the Joint Typhoon Warning Center at the Naval Pacific Meteorology and Oceanography Center in Pearl Harbor, Hawaii, and the Air Force Weather Agency (AFWA).

References

Other websites
Agencies issuing Dvorak intensity estimates
 UW-CIMSS (Advanced Dvorak Technique)
 NOAA/NESDIS Satellite Analysis Branch
 Air Force Weather Agency 
 About the TAFB
Other
 Tropical Cyclone Intensity Analysis and Forecasting from Satellite Imagery Dvorak, 1974. (PDF, 1.3 MB)
 Dvorak Tropical Cyclone Wind Speed Biases Determined from Reconnaissance-based "Best Track" Data (1997-2003) Franklin and Brown
 The Dvorak Technique Through Time Dr. Jack Beven. (WRF File. Requires WebEx player)

Category:Tropical cyclones