National Hurricane Center
April 21, 2009
al872009_radii
vector digital data
http://www.nhc.noaa.gov/gis
The working best track wind radii are the farthest extent from the center of
34-, 50-, and 64-knot winds in each quadrant over the life of a tropical cyclone. The
working best track wind radii will generally not exactly match the radii contained in the
tropical cyclone advisories. This is because all of the data in a working best track are
subject to modification during the life cycle ofthe cyclone.
(Note: The "working best track" represents the forecasters' best estimates of the
location, intensity, and size of a tropical cyclone while the cyclone is ongoing. After the
life cycle is complete, forecasters prepare a "final best track", using data that might not
have been available operationally, and it is the final best track that represents NHC's official
historical record for the cyclone.)
The working best track wind radii shows how the size of the storm has changed and
the areas potentially affected so far by sustained winds of tropical storm
force (34 Knot), 50 knot and hurricane force (64 knot) from a tropical cyclone.
These data are based on the wind radii contained in the Automated Tropical Cyclone
Forecasting (ATCF) system's best track. Users are reminded that the best track
wind radii represent the maximum possible extent of a given wind speed within
particular quadrants around the tropical cyclone. As a result, not all locations
falling within the radii will have experienced the indicated sustained wind speeds.
These data are intended for geographic display and analysis at the national level
and for large regional areas. The data should be displayed and analyzed at scales
appropriate for 1:2,000,000-scale data. No responsibility is assumed by the National
Oceanic and Atmospheric Administration in the use of these data.
April 21, 2009
None planned
-84.648613
-69.082596
24.111261
14.597320
None
Wind Radii
Wind Swath
Hurricane
Hurricane Track
Tropical Storm
Subtropical storm
Subtropical depression
Tropical disturbance
Tropical Wave
Tropical low
Extratropical storm
Major hurricane
Tropical cyclone
Subtropical cyclone
None
United States
Atlantic
North Atlantic Basin
Gulf of Mexico
Caribbean Sea
Pacific Islands
Eastern North Pacific Basin
None
None. Acknowledgement of the National Oceanic and Atmospheric Administration, National Weather Service, National Environmental Prediction Center or the National Hurricane Center would be appreciated in products derived from these data.
GIS POC
National Hurricane Center / Technical Support Branch
physical address
11691 SW 17th St.
Miami
FL
33165
USA
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.2.4.1420
Vector
Entity point
48
0.1
0.1
Decimal degrees
D_Sphere
Sphere
6371200.000000
infinity
al872009_radii
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the features.
RADII
The wind speed in knots associated with the bounding polygon.
34
34 Knot- Tropical Storm Force Wind Radii
50
50 Knot - 50 Knot Wind Radii
64
64 Knot - Hurricane Force Wind Radii
STORMID
A unique character string that is specific to each tropical cyclone.
The string follows the pattern BBNNYYYY, where BB is AL for Atlantic, EP for East Pacific,
and CP for Central Pacific; NN is the sequential number of the storm during the season;
and YYYY is the year.
BASIN
The ocean where the tropical cyclone is located
AL
Atlantic
EP
East Pacific
STORMNUM
The sequential number of the tropical cyclone for a particular BASIN according
to the time that the first advisory is issued.
SYNOPTIME
Initial time in the forecast cycle in which a tropical cyclone’s intensity and size are
analyzed, occurring at 0000, 0600, 1200, or 1800 UTC.
NE
The largest distance of wind speed in Nautical Miles in the NE (0 - 90 degree) quadrant.
SE
The largest distance of wind speed in Nautical Miles in the SE (90 - 180 degree) quadrant.
SW
The largest distance of wind speed in Nautical Miles in the SW (180 - 270 degree) quadrant.
NW
The largest distance of wind speed in Nautical Miles in the NW (270 - 360 degree) quadrant.
Downloadable Data
No responsibility is assumed by the National Oceanic and Atmospheric Administration in the use of these data.
April 21, 2009
National Hurricane Center
GIS POC
Technical Support Branch
physical address
11691 SW 17th St.
Miami
FL
33178
USA
305-229-4400
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
http://www.esri.com/metadata/esriprof80.html
ESRI Metadata Profile