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LiveFeeds/Hurricane_Active (MapServer)

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Service Description:

Map Name: Hurricane Active

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers: Description: This map service describes the path and forecast path of tropical activity.

Forecast points: represent the official NHC forecast locations of the center of a tropical cyclone. Forecast center positions are given for projections valid 12, 24, 36, 48, 72, 96, and 120 h after the forecast's nominal initial time. Click here for more information.

Forecast points from the JTWC are valid 12, 24, 36, 48 and 72 h after the forecast’s initial time.

Forecast track: This product aids in the visualization of an NHC official track forecast, the forecast points are connected by black line segments. The track line(s) are not a forecast product, however, and because there are an infinite number of ways to connect a set of forecast points, the lines should not be interpreted as representing a specific forecast for the location of a tropical cyclone in between official forecast points. It is also important to remember that tropical cyclone track forecasts are subject to error, and that the effects of a tropical cyclone can span many hundreds of miles from the center. Click here for more information.

The Cone of Uncertainty: The cone represents the probable track of the center of a tropical cyclone, and is formed by enclosing the area swept out by a set of circles along the forecast track (at 12, 24, 36 hours, etc). The size of each circle is set so that two-thirds of historical official forecast errors over a 5-year sample fall within the circle. Based on forecasts over the previous 5 years, the entire track of a tropical cyclone can be expected to remain within the cone roughly 60-70% of the time. It is important to note that the area affected by a tropical cyclone can extend well beyond the confines of the cone enclosing the most likely track area of the center. Click here for more information.

Watch/Warning: Coastal areas placed under tropical cyclone watches or warnings are delimited by specific geographical locations known as "breakpoints" (e.g., a hurricane warning is in effect from breakpoint "A" to breakpoint "B"). This file consists of one or more lines connecting the breakpoints delimiting any current watches or warnings. Click here for more information.

Click here for more information about the NHC Data Source

Source: http://www.nhc.noaa.gov/gis/forecast/archive/ep042013_5day_latest.zip (NHC) and http://www.prh.noaa.gov/hnl/cphc/ (CPHC) http://www.usno.navy.mil/JTWC/ (JTWC)

Organization: NOAA, USNO POC: http://www.nhc.noaa.gov/contact.shtml National Hurricane Center / Technical Support Branch, Naval Meteorology and Oceanography Command; Email: SRNS_CNMOC_paoweb@navy.mil, Phone: (228)-688-4394.

Scale/Resolution: The horizontal accuracy of these datasets is not stated but it is important to remember that tropical cyclone track forecasts are subject to error, and that the effects of a tropical cyclone can span many hundreds of miles from the center

Update Frequency: The Aggregated Live Feed Methodology checks the Source for updates every 15 minutes. Tropical cyclones are normally issued every six hours at 5:00 AM EDT, 11:00 AM EDT, 5:00 PM EDT, and 11:00 PM EDT (or 4:00 AM EST, 10:00 AM EST, 4:00 PM EST, and 10:00 PM EST).

Public advisories for Eastern Pacific tropical cyclones are normally issued every six hours at 2:00 AM PDT, 8:00 AM PDT, 2:00 PM PDT, and 8:00 PM PDT (or 1:00 AM PST, 7:00 AM PST, 1:00 PM PST, and 7:00 PM PST).

Intermediate public advisories may be issued every 3 hours when coastal watches or warnings are in effect, and every 2 hours when coastal watches or warnings are in effect and land-based radars have identified a reliable storm center. Additionally, special public advisories may be issued at any time due to significant changes in warnings or in the cyclone. For the NHC Data Source you can subscribe to RSS Feeds.

North Pacific and North Indian Ocean tropical cyclone warnings are updated every 6 hours and South Indian and South Pacific Ocean tropical cyclone warnings are routinely updated every 12 hours. Set to Zulu time.

Area Covered: Atlantic / Eastern Pacific (NHC) + Central Pacific Ocean (CPHC) + South & West Pacific Ocean and the Indian Ocean (JTWC).


Access and Use Constraints: No Restrictions



This work is licensed under the Web Services and API Terms of Use.
View Summary | View Terms of Use

This map is provided for informational purposes and is not monitored 24/7 for accuracy and currency.

Processing: The data is downloaded and processed using The Aggregated Live Feed Methodology

Attributes:
  1. Forecast Positions
  2. Past Positions
  3. Forecast Track
  4. Observed Track
  5. Forecast Error Cone
  6. Watches and Warnings

Symbology:


Copyright Text: ©2013 Esri

Spatial Reference: 102100  (3857)


Single Fused Map Cache: false

Initial Extent: Full Extent: Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info: Supports Dynamic Layers: true

MaxRecordCount: 1000

MaxImageHeight: 2048

MaxImageWidth: 2048

Supported Query Formats: JSON, AMF

Min Scale: 0

Max Scale: 0



Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   Find   Return Updates