• ICAO station ID using the four-letter specification
• delimited by white spaces and/or commas (,)

Obtain all available TAFs for KDEN, KSEA and PHNL

stationString=KDEN KSEA,PHNL

Equivalent to above, obtain TAFs for KSEA and all ICAO IDs beginning with KDE

stationString=KSEA KDE*

• start and end times in seconds since January 1, 1970 (Unix time)
• timeType = issue or valid (default)

Obtain all TAFs for KORD for issue times between these start and end times

startTime=1337242856&endTime=1337250056&timeType=issue &stationString=KORD

• start and end times in ISO8601 date/time format
• timeType = issue or valid (default)

Obtain all TAFs for KMIA collected for issue times between these start and end times in ISO8601 date/time format using UTC offset: YYYY-MM-DDThh:mm:ssZ. Please refer to W3C date/time formats.

startTime=2012-05-17T08:20:56Z&endTime=2012-05-17T10:20:56Z&timeType=issue&stationString=KMIA

Obtain all TAFs for KORD with issue times between these start and end times in ISO8601 date/time format using local offset: YYYY-MM-DDThh:mm:ss+hhmm or YYYY-MM-DDThh:mm:ss-hhmm. Please refer to W3C date/time formats.

startTime=2012-05-17T08:20:56+0000&endTime=2012-05-17T10:20:56+0000&timeType=issue&stationString=KORD

Note: Due to differences in character encodings by various web browsers, the + might get encoded to a whitespace. To avoid this from occurring, use %2B in place of the +.

• any positive integer or floating point value
• n = number of hours before current time
• timeType = issue or valid (default)

Obtain all TAFs in the last three hours based on issue time for KDEN

stationString=KDEN&hoursBeforeNow=3&timeType=issue

Obtain all TAFs collected in the last 6 hours for KDEN, based on issue time

stationString=KDEN&hoursBeforeNow=6&timeType=issue

• true - get the single most recent TAF, only one result is returned
• false - don't get the most recent TAF, equivalent to omitting mostRecent parameter
• the mostRecent constraint MUST be accompanied by a time range in the form of an hoursBeforeNow or startTime/endTime and timeType
• Query is based on the most recent TAF issueTime within the time range defined by hoursBeforeNow or startTime/endTime

Request the most recent of the two icaoId's KSEA and PHNL from three hours ago, based on issue time. Only one TAF is returned, the most recent of the two from three hours ago.

hoursBeforeNow=3&timeType=issue&mostRecent=true&stationString=PHNL KSEA

• constraint - request the most recent for each TAF station in the fastest fashion. Not appropriate for historical data retrieval
• postfilter - post filter results after applying all other constraints
• true - same as 'postfilter' method
• false - don't get the most recent for each TAF station, equivalent to omitting this parameter

Obtain the most recent TAF for each station that was reported in the past two hours from stations starting with KDE.

mostRecentForEachStation=constraint&hoursBeforeNow=2&stationString=KDE

Note: This is not appropriate for historical data retrieval.

Use the postfilter method to obtain the TAFS for KORD, PHKO, KSEA and KSFO from the indicated start and end times. From those results, return only the most recent for each of these stations. Four results should be returned with each result corresponding to the most recent for KORD, PHKO, KSEA and KSFO within the specified time range.

startTime=1337242856&endTime=1337250056&stationString=KORD, PHKO, KSEA, KSFO&mostRecentForEachStation=postfilter

• longitude and latititude in decimal degrees
• -180<= lon <=180
• -90<= lat <=90
• parameters can be listed in any order

Obtain TAFs collected within the last 3 hours for a rectangular region (bounding box) defined by the min and max lon and lat

minLat=25&minLon=-130&maxLat=65&maxLon=-40&hoursBeforeNow=3

• a radius (statute miles) around a point (longitude and latitude in decimal degrees)
• -180<= lon <=180
• -90<= lat <=90
• 0< radius <=500
• Radius and origin are separated by a semicolon(;)
• Described area may not cross the international dateline or either pole

Obtain TAFs valid within the last 3 hours for all the stations within 20 statute miles of -104.65,39.83 (KDEN)

radialDistance=20;-104.65,39.83&hoursBeforeNow=3

• maximum distance in statute miles
• two or more way points
• Way points are indicated by (lon,lat), station names or a combination of (lon,lat) and station name
• lon, lat are delimited by a comma (,)
• maximum distance MUST precede the way points
• maximium distance and way points are delimited by a semicolon(;)
• time range:
  • use start, end times
  • use hoursBeforeNow
  • default: (hoursBeforeNow=1)
• the ordering of way points is significant: always start with origin, end with destination

Obtain all TAFS collected in the past 3 hours for the flight path from Denver, CO to Kansas City, MO using a 57.5 statute mile maximum distance

flightPath=57.5;-104.65,39.83;-94.75,39.3&hoursBeforeNow=3

Same as above, except using the default time range of hoursBeforeNow=1

flightPath=57.5;-104.65,39.83;-94.75,39.3

• 0 < any value <=90
• The degree distance is the distance (based on longitude and latitude) between stations. The larger the value of minDegreeDistance, the less dense the results.
• Duplicate stations are filtered and the most recent of duplicate stations is reported.

Obtain all TAFs collected in the past 3 hours for the flight path from Denver, CO to Orlando, FL using a 57.5 statute mile maximum distance and requesting the lowest density of results.

flightPath=57.5;KDEN;KMCO&minDegreeDistance=90