Active Hurricanes, Cyclones and Typhoons

<div>Hurricane tracks and positions provide information on where the storm has been, where it is currently located, and where it is predicted to go. Each storm location is depicted by the sustained wind speed, according to the <a href='https://www.nhc.noaa.gov/aboutsshws.php' target='_blank' rel='nofollow ugc noopener noreferrer'>Saffir-Simpson Scale</a>. It should be noted that the Saffir-Simpson Scale only applies to hurricanes in the Atlantic and Eastern Pacific basins, however all storms are still symbolized using that classification for consistency.</div><div><br /></div><div><span style='font-weight:bold;'>Data Source</span></div><div><ul><li>This data is provided by <a href='https://www.nhc.noaa.gov/' target='_blank' rel='nofollow ugc noopener noreferrer'>NOAA National Hurricane Center</a> (NHC) for the Central+East Pacific and Atlantic, and the <a href='https://www.metoc.navy.mil/jtwc/jtwc.html' target='_blank' rel='nofollow ugc noopener noreferrer'>Joint Typhoon Warning Center</a> for the West+Central Pacific and Indian basins. For more disaster-related live feeds visit the <a href='https://www.arcgis.com/home/group.html?id=d55ba7a328924596b9fa9d5d1876a970#overview' target='_blank' rel='nofollow ugc noopener noreferrer'>Disaster Web Maps &amp; Feeds ArcGIS Online Group</a>.</li></ul></div><div><span style='font-weight:bold;'>Sample Data</span></div><div><ul><li>See <a href='https://www.arcgis.com/home/item.html?id=0546442443e848a9ae7758fdb98d73f0' target='_blank' rel='nofollow ugc noopener noreferrer'>Sample Layer Item</a> for sample data during inactive Hurricane Season!<br /></li></ul></div><div><span style='font-weight:bold;'>Update Frequency</span></div><div><ul><li><a href='https://www.esriurl.com/LiveFeed' target='_blank' rel='nofollow ugc noopener noreferrer'>The Aggregated Live Feeds methodology</a> 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).</li><li>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).</li><li>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 a cyclone. For the NHC data source you can subscribe to <a href='https://www.nhc.noaa.gov/gis-at.xml' target='_blank' rel='nofollow ugc noopener noreferrer'>RSS Feeds</a>.</li><li>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. Times are set to Zulu/UTC.</li></ul></div><div><span style='font-weight:bold;'>Scale/Resolution</span></div><div><ul><li>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.</li></ul></div><div><span style='font-weight:bold;'>Area Covered</span></div><div><ul><li>World</li></ul></div><div><span style='font-weight:bold;'>Glossary</span></div><div><ul><li><span style='font-weight:bold;'><span style='font-style:italic;'>Forecast location</span></span>: Represents the official NHC forecast locations for the center of a tropical cyclone. Forecast center positions are given for projections valid 12, 24, 36, 48, 72, 96, and 120 hours after the forecast's nominal initial time. <a href='https://www.nhc.noaa.gov/gis/metadata_ex_point_at.xml' target='_blank' rel='nofollow ugc noopener noreferrer'>Click here for more information</a>.

Forecast points from the JTWC are valid 12, 24, 36, 48 and 72 hours after the forecast’s initial time.</li><li><span style='font-style:italic;'><span style='font-weight:bold;'>Forecast track:</span></span> This product aids in the visualization of an NHC official track forecast, the forecast points are connected by a red line. The track lines are not a forecast product, as such, 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. <a href='https://www.nhc.noaa.gov/gis/metadata_ex_lines_at.xml' target='_blank' rel='nofollow ugc noopener noreferrer'>Click here for more information</a>.</li><li><span style='font-style:italic;'><span style='font-weight:bold;'>The Cone of Uncertainty:</span></span> Cyclone paths are hard to predict with absolute certainty, especially days in advance.

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 scaled so that two-thirds of the 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. <a href='https://www.nhc.noaa.gov/gis/metadata_ex_cone_at.xml' target='_blank' rel='nofollow ugc noopener noreferrer'>Click here for more information</a>. <span style='font-weight:bold;'>Now includes</span> 'Danger Area' Polygons from JTWC, detailing US Navy Ship Avoidance Area when Wind speeds exceed 34 Knots!</li><li><span style='font-style:italic;'><span style='font-weight:bold;'>Coastal Watch/Warning:</span></span> Coastal areas are placed under watches and warnings depending on the proximity and intensity of the approaching storm.</li><ul><li><span style='font-style:italic;'>Tropical Storm Watch</span> is issued when a tropical cyclone containing winds of 34 to 63 knots (39 to 73 mph) or higher poses a possible threat, generally within 48 hours. These winds may be accompanied by storm surge, coastal flooding, and/or river flooding. The watch does not mean that tropical storm conditions will occur. It only means that these conditions are possible.</li><li><span style='font-style:italic;'>Tropical Storm Warning</span> is issued when sustained winds of 34 to 63 knots (39 to 73 mph) or higher associated with a tropical cyclone are expected in 36 hours or less. These winds may be accompanied by storm surge, coastal flooding, and/or river flooding.</li><li><span style='font-style:italic;'>Hurricane Watch</span> is issued when a tropical cyclone containing winds of 64 knots (74 mph) or higher poses a possible threat, generally within 48 hours. These winds may be accompanied by storm surge, coastal flooding, and/or river flooding. The watch does not mean that hurricane conditions will occur. It only means that these conditions are possible.</li><li><span style='font-style:italic;'>Hurricane Warning</span> is issued when sustained winds of 64 knots (74 mph) or higher associated with a tropical cyclone are expected in 36 hours or less. These winds may be accompanied by storm surge, coastal flooding, and/or river flooding. A hurricane warning can remain in effect when dangerously high water or a combination of dangerously high water and exceptionally high waves continue, even though winds may be less than hurricane force.</li></ul></ul></div><div><font size='5'>Revisions</font><br /></div><div><ul><li><span style='font-weight:bold;'>Mar 13, 2025</span>: Altered 'Forecast Error Cone' layer to include 'Danger Area' with updated symbology.<span style='font-weight:bold;'></span></li><li><span style='font-weight:bold;'>Nov 20, 2023</span>: Added Event Label to 'Forecast Position' layer, showing arrival time and wind speed localized to user's location.<br /></li><li><span style='font-weight:bold;'>Mar 27, 2022</span>: Added UID, Max_SS, Max_Wind, Max_Gust, and Max_Label fields to ForecastErrorCone layer.<br /></li></ul></div><div><span style='color:rgb(128, 128, 128);'>This map is provided for informational purposes and is not monitored 24/7 for accuracy and currency. Always refer to <a href='https://www.nhc.noaa.gov/contact.shtml' target='_blank' rel='nofollow ugc noopener noreferrer'>NOAA</a> or JTWC sources for official guidance.</span><div><br /></div>If you would like to be alerted to potential issues or simply see when this Service will update next, please visit our <a href='https://livingatlas.arcgis.com/livefeeds-status/' target='_blank' rel='nofollow ugc noopener noreferrer'>Live Feed Status</a> Page!</div>

飓风路径与位置数据可提供风暴过往轨迹、当前所处位置及未来预测动向。依据萨菲尔-辛普森飓风风力等级（Saffir-Simpson Scale），每个风暴点位均以持续风速进行标注。需注意，萨菲尔-辛普森等级仅适用于大西洋及东太平洋海域的飓风，但为统一标准，所有风暴均采用该分级体系进行符号化展示。

**数据来源**
- 本数据集由美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration, NOAA）国家飓风中心（National Hurricane Center, NHC）提供，覆盖中太平洋+东太平洋及大西洋海域；联合台风警报中心（Joint Typhoon Warning Center, JTWC）则负责西太平洋+中太平洋及印度洋海域的数据供给。如需获取更多灾害相关实时数据源，请访问「灾害网络地图与数据源群组（Disaster Web Maps & Feeds ArcGIS Online Group）」。

**样本数据**
- 可访问「样本图层项目（Sample Layer Item）」查看飓风淡季的示例数据。

**更新频率**
- 聚合实时数据源方法每15分钟检查一次源数据更新。热带气旋常规预报信息的发布时间为美国东部夏令时每日5:00、11:00、17:00、23:00（对应美国东部标准时则为每日4:00、10:00、16:00、22:00），发布间隔为每6小时一次。
- 东太平洋热带气旋的公众咨询信息常规发布时间为太平洋夏令时每日2:00、8:00、14:00、20:00（对应太平洋标准时则为每日1:00、7:00、13:00、19:00），间隔同样为每6小时一次。
- 当沿海地区发布监视或预警时，将每3小时发布一次中期公众咨询；若沿海发布监视/预警且陆基雷达已确认风暴中心可靠，则将发布间隔缩短至每2小时。此外，当预警或气旋发生重大变化时，可随时发布特殊公众咨询。针对NHC数据源，用户可订阅其RSS订阅源（RSS Feeds）。
- 北太平洋及北印度洋的热带气旋预警每6小时更新一次，南印度洋及南太平洋的热带气旋预警常规每12小时更新一次，所有时间均采用祖鲁时间/协调世界时（Zulu/UTC）。

**尺度/分辨率**
- 本数据集的水平精度未明确标注，但需牢记：热带气旋路径预报存在误差，且热带气旋的影响范围可延伸至距中心数百英里之外。

**覆盖区域**
- 全球

**术语表**
- **预报位置（Forecast location）**：代表美国国家飓风中心（NHC）发布的热带气旋中心官方预报点位。预报中心位置对应预报名义初始时刻后的12、24、36、48、72、96及120小时的预测时刻。联合台风警报中心（JTWC）的预报点对应预报初始时刻后的12、24、36、48及72小时预测时刻。
- **预报路径（Forecast track）**：该产品用于可视化展示NHC发布的官方路径预报，预报点位以红色线段连接。路径线段并非正式预报产品，不得将其解读为官方预报点位之间的热带气旋位置特定预报。同时需注意，热带气旋路径预报存在误差，且气旋影响范围可延伸至距中心数百英里之外。
- **误差圆锥区（Cone of Uncertainty）**：气旋路径难以绝对精准预测，尤其是提前数日的预报。该圆锥区代表热带气旋中心的大概率移动路径，由沿预报路径（对应12、24、36小时等时刻）的一组圆形区域覆盖范围构成。每个圆形的尺寸按5年样本期内三分之二的官方历史预报误差落在该圆形范围内进行缩放。基于过往5年的预报数据，热带气旋的完整路径约有60%-70%的概率落在圆锥区内。需特别注意，热带气旋的影响区域可远超该圆锥区所包围的中心最可能移动路径范围。现已新增联合台风警报中心（JTWC）的**危险区域（Danger Area）**多边形图层，用于标注当风速超过34节时的美国海军船舶避航区域！
- **沿海监视/预警（Coastal Watch/Warning）**：沿海地区的监视与预警等级取决于临近风暴的距离及强度。
- **热带风暴监视**：当热带气旋携带34~63节（39~73英里/小时）及以上风速，且大概率在48小时内对指定区域构成威胁时发布。此类风速可能伴随风暴潮、沿海洪涝及/或内河洪涝。该监视并非表示热带风暴条件一定会出现，仅代表该情况存在发生可能。
- **热带风暴预警**：当热带气旋伴随34~63节（39~73英里/小时）及以上风速，且预计将在36小时内影响指定区域时发布。此类风速可能伴随风暴潮、沿海洪涝及/或内河洪涝。
- **飓风监视**：当热带气旋携带64节（74英里/小时）及以上风速，且大概率在48小时内对指定区域构成威胁时发布。此类风速可能伴随风暴潮、沿海洪涝及/或内河洪涝。该监视并非表示飓风条件一定会出现，仅代表该情况存在发生可能。
- **飓风预警**：当热带气旋伴随64节（74英里/小时）及以上风速，且预计将在36小时内影响指定区域时发布。此类风速可能伴随风暴潮、沿海洪涝及/或内河洪涝。即使后续风速降至飓风强度以下，只要存在极端高水位或极端高水位叠加巨浪的危险情况，飓风预警仍可维持生效。

**修订记录**
- **2025年3月13日**：调整「预报误差圆锥区」图层，新增「危险区域」内容并更新符号系统。
- **2023年11月20日**：为「预报位置」图层新增事件标签，可根据用户所在地区本地化显示风暴抵达时间与风速信息。
- **2022年3月27日**：为ForecastErrorCone图层新增UID、Max_SS、Max_Wind、Max_Gust及Max_Label字段。

本地图仅用于信息参考，未进行7×24小时的精度与时效性监控。如需获取官方权威指导，请始终参考美国国家海洋和大气管理局（NOAA）或联合台风警报中心（JTWC）的官方数据源。

若您希望接收潜在问题提醒或查看本服务的下次更新时间，请访问我们的「实时数据源状态页面（Live Feed Status Page）」！