NOAA Flash Flood Warnings

The National Weather Service issues warnings for severe weather that are imminent or actively occurring. This layer shows shorter-term warnings for the following events:<br /><ul><li>Special Marine Warnings - potentially hazardous weather conditions of short duration (up to 2 hours) that may include sustained winds or gusts of 39 mph or greater, hail 0.75” or greater in diameter, or waterspouts.</li><li>Severe Thunderstorm Warnings - storms with winds of 58 mph or higher or hail 1” or greater in diameter.</li><li>Tornado Warnings - imminent or active tornados.</li><li>Extreme Wind Warnings - surface winds of 115 mph or greater associated with non-convective, downslope, derecho, or sustained hurricane winds are expected to occur within one hour.</li><li>Flash Flood Warnings - conditions are favorable for flash flooding. It does not mean that flash flooding will occur, but it is possible.<br /></li></ul><div><span style='font-weight:bold;'>Source</span></div><div><ul><li>Current Warnings: <a href='https://www.weather.gov/source/crh/shapefiles/CurrentWarnings.tar.gz' target='_blank' rel='nofollow ugc noopener noreferrer'>https://www.weather.gov/source/crh/shapefiles/CurrentWarnings.tar.gz</a></li></ul></div><div><div><span style='font-weight:bold;'>Sample Data</span></div><ul><li>See <a href='https://www.arcgis.com/home/item.html?id=e4fae351de854847acbfc46426c7f6c3' target='_blank' rel='nofollow ugc noopener noreferrer'>Sample Layer Item</a> for sample data during Weather inactivity!</li></ul></div><span style='font-weight:bold;'>Update Frequency</span><br /><ul><li>The service is updated every 5 minutes using the <a href='https://www.esriurl.com/LiveFeed' target='_blank' rel='nofollow ugc noopener noreferrer'>Aggregated Live Feeds methodology</a>.</li></ul><span style='font-weight:bold;'>Area Covered</span><div><ul><li>Contiguous United States</li></ul><font size='3'>What can you do with this layer?</font></div><div><ul><li>Customize the display of each attribute by using the Change Style option for any layer.</li><li>Query the layer to display only specific types of weather watches and warnings.</li><li>Add to a map with other weather data layers to provide inside on hazardous weather events.</li><li>Use ArcGIS Online analysis tools, such as Enrich Data, to determine the potential impact of weather events on populations.</li></ul><span style='color:rgb(128, 128, 128);'><span style='background-color:rgb(255, 255, 255);'>This map is provided for informational purposes and is not monitored 24/7 for accuracy and currency.</span></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>