WindDirectionData

WindDirectionData[]

gives the most recent measurement for wind direction near the current location.

WindDirectionData[datespec]

gives the wind direction value for the specified time near the current location.

WindDirectionData[locationspec]

gives the most recent measurement for wind direction near the specified location.

WindDirectionData[locationspec,datespec]

gives the value or values for the specified date and location.

WindDirectionData[{{location1,date1},{location2,date2},}]

gives values for all specified locations on the specified dates.

Details and Options

  • WindDirectionData gives current and historical wind direction data for all standard weather stations worldwide.
  • WindDirectionData[] makes use of $GeoLocation and $TimeZone to determine your location and time zone. It returns the most recent measurement of wind direction for the nearest high-reliability weather station to the location specified by $GeoLocation.
  • The location can be specified as an ICAO code such as "KNYC", a WMO code such as "WMO12345", an amateur weather station code such as "C1234", or another standardized weather station identifier.
  • The location can also be specified by latitude/longitude pairs, assuming degrees as units, a GeoPosition specification, or Entity objects, assuming they represent objects with geographic coordinates. They can also be GeoGraphics primitives such as GeoDisk, or a city specification of the type used in CityData. WindDirectionData gives measurements for the nearest high-reliability weather station to the location.
  • locationspec can be either individual locations or lists of them.
  • datespec can be specified as a date list, a string in DateString format, or as a DateObject.
  • WindDirectionData[locationspec,datespec] by default takes datespec to be given in local time and uses UTC for all output times.
  • When specific times are given, an interpolated result for that time is returned. datespec specifications for a day or longer period return the interval of wind direction measurements.
  • datespec can be specified as {start,end,step} for compatibility with DateRange specifications. step can be All, "Day", "Week", "Month", or "Year". All gives all recorded observations. If omitted, step is assumed to have the value All.
  • Location and date can also be specified together as Association["Location"->locationspec,"Date"datespec].
  • WindDirectionData[locationspec,datespec,func] is used to specify the format of output when locations are specified.
  • Possible settings for func include:
  • Allreturn all values for extended locations and times
    Automaticreturn intervals for extended locations and indeterminate times
    Intervalreturn intervals for extended locations and times
    Maxreturn maximum values for extended locations and times
    Meanreturn mean value for extended locations and times
    Minreturn minumum values for extended locations and times
    StandardDeviationreturn standard deviation for extended locations and times
    "Stations"return all values along with their source weather station
  • Wind direction is returned in degrees as measured clockwise from the north.
  • The option UnitSystem controls output units. The default value is set by $UnitSystem. The following settings can also be used:
  • "Imperial"return results in imperial units
    "Metric"return results in metric units
  • WindDirectionData[locationspec,"property"] returns the specified weather station property for the location corresponding to locationspec.
  • Properties related to identifying weather stations include:
  • "Coordinates"weather station coordinates as a GeoPosition
    "Memberships"WMO, NCDC, and CWOP reporting network membership
    "NearestStation"the nearest weather station
    "StationDistance"distance in km between specified location and station given
    "StationName"weather station name
  • WindDirectionData can retrieve observational wind direction data from meteorological stations throughout the world.

Examples

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Basic Examples  (1)

Find the most recent wind direction measurement near your current location as measured clockwise from due north:

Obtain the wind direction for a specific weather station:

Obtain the interpolated wind direction at a specific date for a location:

Scope  (19)

Location Specification  (6)

The current wind direction measurement from a high-reliability station at the approximate coordinates of "KBOS":

Coordinates can be supplied for a location:

Entity objects can be used:

Obtain appropriate Entity using free-form input ():

Discover the range of wind direction readings in a 180-degree arc to the west of Paris:

Find the wind direction measurement range across a geographic region:

To return the station from coordinates or a city name, use the "StationName" property:

Station Properties  (3)

Find the name and coordinates of the station used:

Discover the relative distance of the station used from a specified location:

Learn a station's altitude:

Date Specification  (3)

Dates can be input using DateObject:

Dates can also be specified in DateList format:

Date ranges in the format {start,end} will return all data within that range:

Date specifications for a time period longer than an hour will return the Interval for the wind directions for that time period:

Lists of Locations  (3)

Lists of locations can be provided:

Search for interpolated wind directions for multiple locations at a specific time:

Find the calculated wind directions of multiple locations and dates:

Format Specification  (2)

Find the wind direction for an extended location:

Obtain the maximum or minimum angle of the wind:

Use the setting Mean to obtain the average recorded wind direction:

Return the station for all displayed values:

Association Specification  (2)

Date and location can be specified together using Association:

Association specification works with format arguments:

Options  (1)

UnitSystem  (1)

By default, results use the format given by $UnitSystem:

Set UnitSystem to adjust the units:

Applications  (1)

Examine the distribution of wind direction measurements over a year:

Average over the recorded wind directions for the year to find the dominant direction:

Properties & Relations  (2)

By default, location is specified by $GeoLocation:

Find all stations in a region with GeoEntities:

Find the wind direction at all stations:

Interactive Examples  (1)

Visualize the change in wind direction measurements over time:

Neat Examples  (1)

Explore how the winds shift and focus in direction during the monsoon season in southwestern India:

Introduced in 2014
 (10.0)