Watches for Short-Duration Hazards for Inland, Coastal, and Maritime Areas

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This nowCOAST time-enabled map service provides maps depicting the geographic coverage of the latest NOAA/National Weather Service (NWS) WATCHES for the following short-duration hazardous weather and hydrological events which may affect inland and coastal areas: severe thunderstorms (surface winds of 58 MPH (93 KM/H, 50 knots) or greater, large hail of 1 inch (2.5 cm) or greater in diameter, tornadoes, and flash floods. A watch indicates that the risk of hazardous weather or hydrologic event has increased significantly, but its occurrence, location, and/or timing is still uncertain. The geographic areas covered by Severe Thunderstorm, Tornado, and Flash Flood Watches are usually indicated by county or subdivided-county boundaries. The colors used to identify the different watches are the same colors used by the NWS on their map at The NWS watches are updated in the nowCOAST map service approximately every 10 minutes.