Tornado Events

Overview

This portion of the API concerns tornado events, which are polygon data affecting a geographic region (defined by an extent) or location (defined by a point). There are 4 request types, providing various levels of detail. Each response identifies a possible transition to further information. These can be depicted as follows:

Tornado Request Transition Diagram

Event Summary

This request is the “entry point” for the tornado event portion of the API. It returns the total number of tornado events impacting a given location or region within a date range (the last 90 days by default) as JSON or XML. Links to the latest event and event history (within the same date range) are included in the response to facilitate client-side transitions.

URI Examples

forensic.api.wdtinc.com/v2/tornado/summary/+DD.ddd-DDD.ddd?begin=&end=u=&t=
forensic.api.wdtinc.com/v2/tornado/summary/+DD.ddd-DDD.ddd.xml?begin=&end=u=&t=

forensic.api.wdtinc.com/v2/tornado/summary/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=
forensic.api.wdtinc.com/v2/tornado/summary/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&end=&u=&t=

See Request Format for a description of the parameters.

JSON Response

The JSON representation of a location-based resource is structured as follows (loosely based on Google’s JSON style guide):

{
    "apiVersion": "2.5.7",
    "eventSummary": {
        "selfLink": "/v2/tornado/summary/+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "dateRange": {
            "begin": "YYYY-MM-DDThh:mm:ssZ",
            "end": "YYYY-MM-DDThh:mm:ssZ"
        },
        "location": "+DD.ddd-DDD.ddd",
        "eventCount": nn,
        "eventHistoryLink": "/v2/tornado/history/+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "latestEventLink": "/v2/tornado/latest/+DD.ddd-DDD.ddd?begin=&end=&u=&t="
    }
}

The JSON representation of a region-based resource is structured acd ss follows (loosely based on Google’s JSON style guide):

{
    "apiVersion": "2.5.7",
    "eventSummary": {
        "selfLink": "/v2/tornado/summary/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "dateRange": {
            "begin": "YYYY-MM-DDThh:mm:ssZ",
            "end": "YYYY-MM-DDThh:mm:ssZ"
        },
        "region": "+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd",
        "eventCount": nn,
        "eventHistoryLink": "/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "latestEventLink": "/v2/tornado/latest/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t="
    }
}

XML Response

The XML representation of a location-based resource is structured as follows (based on Google’s XML style guide):

<?xml version="1.0" encoding="UTF-8"?>
<eventSummary xmlns="http://forensic.api.wdtinc.com/tornado"
              xmlns:xlink="http://www.w3.org/1999/xlink"
              xlink:href="/v2/tornado/summary/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=">
    <dateRange begin="YYYY-MM-DDThh:mm:ssZ" end="YYYY-MM-DDThh:mm:ssZ" />
    <location format="iso6709">+DD.ddd-DDD.ddd</location>
    <eventCount>nn</eventCount>
    <eventHistory xlink:href="/v2/tornado/history/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=" />
    <latestEvent xlink:href="/v2/tornado/latest/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=" />
</eventSummary>

The XML representation of a region-based resource is structured as follows (based on Google’s XML style guide):

<?xml version="1.0" encoding="UTF-8"?>
<eventSummary xmlns="http://forensic.api.wdtinc.com/tornado"
              xmlns:xlink="http://www.w3.org/1999/xlink"
              xlink:href="/v2/tornado/summary/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=">
    <dateRange begin="YYYY-MM-DDThh:mm:ssZ" end="YYYY-MM-DDThh:mm:ssZ" />
    <region format="iso6709">+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd</region>
    <eventCount>nn</eventCount>
    <eventHistory xlink:href="/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=" />
    <latestEvent xlink:href="/v2/tornado/latest/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=" />
</eventSummary>

Latest Event

This request returns the most recent tornado event impacting a given location or region within a date range (all available history by default) as JSON or XML. Event details include the ID, date, and strength of the rotation, which is qualitatively classified as weak, moderate, significant, severe, or extreme. Links to the event history (within the same date range) and event vectors (for the latest event) are included in the response to facilitate client-side transitions.

URI Examples

forensic.api.wdtinc.com/v2/tornado/latest/+DD.ddd-DDD.ddd?begin=&end=&u=&t=
forensic.api.wdtinc.com/v2/tornado/latest/+DD.ddd-DDD.ddd.xml?begin=&end=&u=&t=

forensic.api.wdtinc.com/v2/tornado/latest/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=
forensic.api.wdtinc.com/v2/tornado/latest/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&end=&u=&t=

See Request Format for a description of the parameters.

JSON Response

The JSON representation of a location-based resource is structured as follows (loosely based on Google’s JSON style guide):

{
    "apiVersion": "2.5.7",
    "latestEvent": {
        "selfLink": "/v2/tornado/latest/+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "dateRange": {
            "begin": "YYYY-MM-DDThh:mm:ssZ",
            "end": "YYYY-MM-DDThh:mm:ssZ"
        },
        "location": "+DD.ddd-DDD.ddd",
        "event": {
            "id": "",
            "date": "YYYY-MM-DD",
            "rotationStrength": "significant",
            "vectorsLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&t="
        },
        "eventHistoryLink": "/v2/tornado/history/+DD.ddd-DDD.ddd?begin=&end=&u=&t="
    }
}

The JSON representation of a region-based resource is structured as follows (loosely based on Google’s JSON style guide):

{
    "apiVersion": "2.5.7",
    "latestEvent": {
        "selfLink": "/v2/tornado/latest/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "dateRange": {
            "begin": "YYYY-MM-DDThh:mm:ssZ",
            "end": "YYYY-MM-DDThh:mm:ssZ"
        },
        "region": "+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd",
        "event": {
            "id": "",
            "date": "YYYY-MM-DD",
            "rotationStrength": "significant",
            "vectorsLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&t="
        },
        "eventHistoryLink": "/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t="
    }
}

XML Response

The XML representation of a location-based resource is structured as follows (based on Google’s XML style guide):

<?xml version="1.0" encoding="UTF-8"?>
<latestEvent xmlns="http://forensic.api.wdtinc.com/tornado"
             xmlns:xlink="http://www.w3.org/1999/xlink"
             xlink:href="/v2/tornado/latest/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=">
    <dateRange begin="YYYY-MM-DDThh:mm:ssZ" end="YYYY-MM-DDThh:mm:ssZ" />
    <location format="iso6709">+DD.ddd-DDD.ddd</location>
    <event id="">
        <date>YYYY-MM-DD</date>
        <rotationStrength>significant</rotationStrength>
        <vectors xlink:href="/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=" />
    </event>
    <eventHistory xlink:href="/v2/tornado/history/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=" />
</latestEvent>

The XML representation of a region-based resource is structured as follows (based on Google’s XML style guide):

<?xml version="1.0" encoding="UTF-8"?>
<latestEvent xmlns="http://forensic.api.wdtinc.com/tornado"
             xmlns:xlink="http://www.w3.org/1999/xlink"
             xlink:href="/v2/tornado/latest/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=">
    <dateRange begin="YYYY-MM-DDThh:mm:ssZ" end="YYYY-MM-DDThh:mm:ssZ" />
    <region format="iso6709">+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd</region>
    <event id="">
        <date>YYYY-MM-DD</date>
        <rotationStrength>significant</rotationStrength>
        <vectors xlink:href="/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=" />
    </event>
    <eventHistory xlink:href="/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=" />
</latestEvent>

Event History

This request returns the history of tornado events impacting a given location or region within a date range (the last 90 days by default) as JSON or XML. Event details include the ID, date, and strength of the rotation, which is qualitatively classified as weak, moderate, significant, severe, or extreme. A link to the event vectors (for each event in the history) is included in the response to facilitate a client-side transition.

URI Examples

forensic.api.wdtinc.com/v2/tornado/history/+DD.ddd-DDD.ddd?begin=&end=&u=&t=
forensic.api.wdtinc.com/v2/tornado/history/+DD.ddd-DDD.ddd.xml?begin=&end=&u=&t=

forensic.api.wdtinc.com/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=
forensic.api.wdtinc.com/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd.xml?begin=&end=&u=&t=

See Request Format for a description of the parameters.

JSON Response

The JSON representation of a location-based resource is structured as follows (loosely based on Google’s JSON style guide):

{
    "apiVersion": "2.5.7",
    "eventHistory": {
        "selfLink": "/v2/tornado/history/+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "dateRange": {
            "begin": "YYYY-MM-DDThh:mm:ssZ",
            "end": "YYYY-MM-DDThh:mm:ssZ"
        },
        "location": "+DD.ddd-DDD.ddd",
        "events": [
            {
                "id": "",
                "date": "YYYY-MM-DD",
                "rotationStrength": "severe",
                "vectorsLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&t="
            },
            {
                "id": "",
                "date": "YYYY-MM-DD",
                "rotationStrength": "moderate",
                "vectorsLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&t="
            },
            :
            :
        ]
    }
}

The JSON representation of a region-based resource is structured as follows (loosely based on Google’s JSON style guide):

{
    "apiVersion": "2.5.7",
    "eventHistory": {
        "selfLink": "/v2/tornado/history/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd?begin=&end=&u=&t=",
        "dateRange": {
            "begin": "YYYY-MM-DDThh:mm:ssZ",
            "end": "YYYY-MM-DDThh:mm:ssZ"
        },
        "region": "+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd",
        "events": [
            {
                "id": "",
                "date": "YYYY-MM-DD",
                "rotationStrength": "severe",
                "vectorsLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&t="
            },
            {
                "id": "",
                "date": "YYYY-MM-DD",
                "rotationStrength": "moderate",
                "vectorsLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&t="
            },
            :
            :
        ]
    }
}

XML Response

The XML representation of a location-based resource is structured as follows (based on Google’s XML style guide):

<?xml version="1.0" encoding="UTF-8"?>
<eventHistory xmlns="http://forensic.api.wdtinc.com/tornado"
              xmlns:xlink="http://www.w3.org/1999/xlink"
              xlink:href="/v2/tornado/history/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=">
    <dateRange begin="YYYY-MM-DDThh:mm:ssZ" end="YYYY-MM-DDThh:mm:ssZ" />
    <location format="iso6709">+DD.ddd-DDD.ddd</location>
    <event id="">
        <date>YYYY-MM-DD</date>
        <rotationStrength>severe</rotationStrength>
        <vectors xlink:href="/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=" />
    </event>
    <event id="">
        <date>YYYY-MM-DD</date>
        <rotationStrength>moderate</rotationStrength>
        <vectors xlink:href="/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=" />
    </event>
        :
        :
</eventHistory>

The XML representation of a region-based resource is structured as follows (based on Google’s XML style guide):

<?xml version="1.0" encoding="UTF-8"?>
<eventHistory xmlns="http://forensic.api.wdtinc.com/tornado"
              xmlns:xlink="http://www.w3.org/1999/xlink"
              xlink:href="/v2/tornado/history/+DD.ddd-DDD.ddd.xml?begin=&amp;end=&amp;u=&amp;t=">
    <dateRange begin="YYYY-MM-DDThh:mm:ssZ" end="YYYY-MM-DDThh:mm:ssZ" />
    <region format="iso6709">+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd</region>
    <event id="">
        <date>YYYY-MM-DD</date>
        <rotationStrength>severe</rotationStrength>
        <vectors xlink:href="/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=" />
    </event>
    <event id="">
        <date>YYYY-MM-DD</date>
        <rotationStrength>moderate</rotationStrength>
        <vectors xlink:href="/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=" />
    </event>
        :
        :
</eventHistory>

Event Vectors

This request returns the vector geometry depicting tornado events that impacted a given location or region on a given date. Results are returned as GeoJSON or KML. No transitions are available from the response. An empty feature collection is returned if there are no events.

URI Examples

forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd/ssssssssss?radius=&u=&t=
forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd/ssssssssss.kml?radius=&u=&t=

forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd/YYYY-MM-DD?radius=&u=&t=
forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd/YYYY-MM-DD.kml?radius=&u=&t=

forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd/YYYY-MM-DDThh:mm:ssZ?radius=&u=&t=
forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd/YYYY-MM-DDThh:mm:ssZ.kml?radius=&u=&t=

forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/ssssssssss?u=&t=
forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/ssssssssss.kml?u=&t=

forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/YYYY-MM-DDThh:mm:ssZ?u=&t=
forensic.api.wdtinc.com/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/YYYY-MM-DDThh:mm:ssZ.kml?u=&t=

See Request Format for a description of the parameters.

GeoJSON Response

The GeoJSON representation of a location-based resource is structured as follows:

{
    "apiVersion": "2.5.7",
    "eventVectors": {
        "selfLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&t=",
        "date": "YYYY-MM-DD",
        "location": "+DD.ddd-DDD.ddd",
        "type": "FeatureCollection",
        "features": [
            {
                "type": "Feature",
                "geometry": {
                    "type": "Polygon",
                    "coordinates": [
                        [ [-102.3555, 39.8420], [-99.8945, 39.8420], ... ]
                    ]
                },
                "properties": {
                    "id": "",
                    "rotationStrength": "weak"
                }
            },
            {
                "type": "Feature",
                "geometry": {
                    "type": "Polygon",
                    "coordinates": [
                        [ [-96.9941, 36.3148], [-93.2148, 36.3148], ... ]
                    ]
                },
                "properties": {
                    "id": "",
                    "rotationStrength": "moderate"
                }
            },
            :
            :
        ]
    }
}

The GeoJSON representation of a region-based resource is structured as follows:

{
    "apiVersion": "2.5.7",
    "eventVectors": {
        "selfLink": "/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&t=",
        "date": "YYYY-MM-DD",
        "region": "+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd",
        "type": "FeatureCollection",
        "features": [
            {
                "type": "Feature",
                "geometry": {
                    "type": "Polygon",
                    "coordinates": [
                        [ [-102.3555, 39.8420], [-99.8945, 39.8420], ... ]
                    ]
                },
                "properties": {
                    "id": "",
                    "rotationStrength": "weak"
                }
            },
            {
                "type": "Feature",
                "geometry": {
                    "type": "Polygon",
                    "coordinates": [
                        [ [-96.9941, 36.3148], [-93.2148, 36.3148], ... ]
                    ]
                },
                "properties": {
                    "id": "",
                    "rotationStrength": "moderate"
                }
            },
            :
            :
        ]
    }
}

KML Response

The KML representation of a location-based resource is structured as follows:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
    <Document>
        <name>Tornado Events</name>
        <ExtendedData>
            <Data name="selfLink">
                <value>/v2/tornado/vectors/+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=</value>
            </Data>
            <Data name="date"><value>YYYY-MM-DD</value></Data>
            <Data name="location"><value>+DD.ddd-DDD.ddd</value></Data>
        </ExtendedData>
        <Placemark>
            <name>8082258</name>
            <ExtendedData>
                <Data name="rotationStrength"><value>weak</value></Data>
            </ExtendedData>
            <Polygon>
                <outerBoundaryIs>
                    <LinearRing>
                        <coordinates>-99.6442,33.3989 -99.6360,33.3777 ...</coordinates>
                    </LinearRing>
                </outerBoundaryIs>
            </Polygon>
        </Placemark>
        <Placemark>
            <name>8082570</name>
            <ExtendedData>
                <Data name="rotationStrength"><value>moderate</value></Data>
            </ExtendedData>
            <Polygon>
                <outerBoundaryIs>
                    <LinearRing>
                        <coordinates>-99.6442,33.4089 -99.6370,33.3787 ...</coordinates>
                    </LinearRing>
                </outerBoundaryIs>
            </Polygon>
        </Placemark>
            :
            :
    </Document>
</kml>

The KML representation of a region-based resource is structured as follows:

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
    <Document>
        <name>Tornado Events</name>
        <ExtendedData>
            <Data name="selfLink">
                <value>/v2/tornado/vectors/+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd/dddddddddd?u=&amp;t=</value>
            </Data>
            <Data name="date"><value>YYYY-MM-DD</value></Data>
            <Data name="region"><value>+DD.ddd-DDD.ddd+DD.ddd-DDD.ddd</value></Data>
        </ExtendedData>
        <Placemark>
            <name>8082258</name>
            <ExtendedData>
                <Data name="rotationStrength"><value>weak</value></Data>
            </ExtendedData>
            <Polygon>
                <outerBoundaryIs>
                    <LinearRing>
                        <coordinates>-99.6442,33.3989 -99.6360,33.3777 ...</coordinates>
                    </LinearRing>
                </outerBoundaryIs>
            </Polygon>
        </Placemark>
        <Placemark>
            <name>8082570</name>
            <ExtendedData>
                <Data name="rotationStrength"><value>moderate</value></Data>
            </ExtendedData>
            <Polygon>
                <outerBoundaryIs>
                    <LinearRing>
                        <coordinates>-99.6442,33.4089 -99.6370,33.3787 ...</coordinates>
                    </LinearRing>
                </outerBoundaryIs>
            </Polygon>
        </Placemark>
            :
            :
    </Document>
</kml>