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).[1]
Dvorak Technique Media
Common developmental patterns seen during tropical cyclone development, and their Dvorak-assigned intensities
The Dvorak technique does not correctly diagnose cyclone intensity for storms like Subtropical Storm Andrea since it only applies to tropical cyclones
Dvorak enhancement imagery of Typhoon Haiyan at T8.0
Tropical Storm Wilma at T3.0
Tropical Storm Dennis at T4.0
Hurricane Jeanne at T5.0
Hurricane Emily at T6.0
References
- ↑ "Objective Dvorak Technique". University of Wisconsin. Retrieved 2006-05-29.
Other websites
- Agencies issuing Dvorak intensity estimates
- UW-CIMSS (Advanced Dvorak Technique)
- NOAA/NESDIS Satellite Analysis Branch
- Air Force Weather Agency Archived 2006-03-28 at the Wayback Machine
- About the TAFB
- Other
- Tropical Cyclone Intensity Analysis and Forecasting from Satellite Imagery[dead link] 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[dead link] Dr. Jack Beven. (WRF File. Requires WebEx player)
