National Hurricane Center
April 27, 2009
al872009_2009083018_initialradii
vector digital data
http://www.nhc.noaa.gov/gis
The surface wind field is a smoothed region showing the farthest extent from the
center of 34-, 50-, and 64-knot winds in each quadrant of a tropical cyclone at the
time an advisory is issued. Consequently, it is not an exact representation of
the wind field.
This surface wind field is intended to show the areas potentially being affected
by sustained winds of tropical storm force (34 knot), 50 knot and and hurricane force
(64 knot) winds from a tropical cyclone. These data are based on the wind radii contained
in the associated Forecast/Advisory. Users are reminded that the Forecast/Advisory 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 be experiencing the indicated 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 27, 2009
None planned
-84.959473
-80.511780
24.410093
20.278872
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
3
0.1
0.1
Decimal degrees
D_Sphere
Sphere
6371200.000000
infinity
al872009_2009083018_initialradii
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.
TAU
Number of hours from the forecast valid time for which a forecast is made.
VALIDTIME
the time in which a forecast or warning is in effect, until it is updated or superseded by a new forecast issuance
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 27, 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