Avertissements météorologiques sévères officiels près de Layton

A Tropical Storm Warning means tropical storm-force winds are expected somewhere within this area within the next 36 hours * LOCATIONS AFFECTED - Marathon - Key Colony Beach - Layton * WIND - LATEST LOCAL FORECAST: Equivalent tropical storm-force wind - Peak Wind Forecast: 30-40 mph with gusts to 50 mph - Window for tropical storm-force winds: late Wednesday evening until midday Thursday - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for wind 39 to 57 mph - The wind threat has remained nearly steady from the previous assessment. - PLAN: Plan for hazardous wind of equivalent tropical storm- force. - PREPARE: Remaining efforts to protect property should be completed as soon as possible. Prepare for limited wind damage. - ACT: Move to safe shelter before the wind becomes hazardous. - POTENTIAL IMPACTS: Limited - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Some fences and roadway signs blown over. - A few roads impassable from debris, particularly in heavily wooded places. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. * STORM SURGE - LATEST LOCAL FORECAST: Localized storm surge possible - Peak Storm Surge Inundation: The potential for up to 2 feet above ground within surge prone areas - Window of concern: Wednesday evening until Thursday evening - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm surge flooding greater than 1 foot above ground - The storm surge threat has remained nearly steady from the previous assessment. - PLAN: Plan for storm surge flooding greater than 1 foot above ground. - PREPARE: Complete preparations for storm surge flooding, especially in low-lying vulnerable areas, before conditions become unsafe. - ACT: Leave immediately if evacuation orders are given for your area. - POTENTIAL IMPACTS: Limited - Localized inundation with storm surge flooding mainly along immediate shorelines and in low-lying spots. - Sections of roads and parking lots inundated by surge water. Driving conditions dangerous in places where surge water covers the road. - Moderate beach erosion. - Minor to locally moderate damage to marinas, docks, boardwalks, and piers. A few small craft broken away from moorings. * FLOODING RAIN - LATEST LOCAL FORECAST: - Peak Rainfall Amounts: Additional 1-3 inches, with locally higher amounts - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for localized flooding rain - The flooding rain threat has remained nearly steady from the previous assessment. - PLAN: Emergency plans should include the potential for localized flooding from heavy rain. - PREPARE: Consider protective actions if you are in an area vulnerable to flooding. - ACT: Heed any flood watches and warnings. - POTENTIAL IMPACTS: Limited - Flood waters can enter a few structures, especially in usually vulnerable spots. A few places where rapid ponding of water occurs at underpasses, low-lying spots, and poor drainage areas. Several storm drains and retention ponds become near-full and begin to overflow. Some brief road and bridge closures. * TORNADO - LATEST LOCAL FORECAST: - Situation is somewhat favorable for tornadoes - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for a few tornadoes - The tornado threat has increased from the previous assessment. - PLAN: Emergency plans should include the potential for a few tornadoes. - PREPARE: If your shelter is particularly vulnerable to tornadoes, prepare to relocate to safe shelter before hazardous weather arrives. - ACT: If a tornado warning is issued, be ready to shelter quickly. - POTENTIAL IMPACTS: Limited - A few places may experience tornado damage, along with power and communications disruptions. - Locations could realize roofs peeled off buildings, mobile homes pushed off foundations or overturned, large tree tops and branches snapped off, shallow-rooted trees knocked over, moving vehicles blown off roads, and small boats pulled from moorings. * FOR MORE INFORMATION: - Family emergency plans: Federal Emergency Management Agency - http://ready.gov/ - Local weather conditions and forecasts: NOAA/Florida Keys National Weather Service - http://www.weather.gov/key/

* WHAT...Southeast to south winds increasing to 25 to 35 kt with gusts up to 45 kt. Seas building to 7 to 11 ft in Hawk Channel and the Straits of Florida south of the Middle Keys. * WHERE...Hawk Channel from Craig Key to west end of Seven Mile Bridge, Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge, Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM, and Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out. * WHEN...Tropical Storm force winds expected from Wednesday evening until Thursday morning. * IMPACTS...A Tropical Storm Warning means that sustained winds of 34 to 63 knots associated with a tropical storm are expected within 36 hours.

* WHAT...Southeast to south winds increasing to 25 to 35 kt with gusts up to 45 kt. Seas building to 7 to 11 ft in Hawk Channel and the Straits of Florida south of the Middle Keys. * WHERE...Hawk Channel from Craig Key to west end of Seven Mile Bridge, Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge, Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM, and Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out. * WHEN...Tropical Storm force winds expected from Wednesday evening until Thursday morning. * IMPACTS...A Tropical Storm Warning means that sustained winds of 34 to 63 knots associated with a tropical storm are expected within 36 hours.

HLSKEY This product covers the Florida Keys **Tropical Storm Warning is in effect for the Lower Keys** **Tropical Storm Watch is in effect for the Middle Keys** NEW INFORMATION --------------- * CHANGES TO WATCHES AND WARNINGS: - The Tropical Storm Watch has been upgraded to a Tropical Storm Warning for Monroe Lower Keys - A Tropical Storm Watch has been issued for Monroe Middle Keys * CURRENT WATCHES AND WARNINGS: - A Tropical Storm Warning is in effect for Monroe Lower Keys - A Tropical Storm Watch is in effect for Monroe Middle Keys * STORM INFORMATION: - About 380 miles south-southwest of Key West FL - 19.5N 84.3W - Storm Intensity 45 mph - Movement Northwest or 310 degrees at 12 mph SITUATION OVERVIEW ------------------ As of 11 AM EDT, newly formed Tropical Storm Helene was centered about 380 miles south-southwest of Key West, and is moving to the northwest near 12 mph. This motion is expected to continue through tonight, followed by a faster northward to north-northeastward motion on Wednesday and Thursday. On the forecast track, the center of the system is forecast to move across the northwestern Caribbean Sea towards the Yucatan Peninsula through tonight, and then over the eastern Gulf of Mexico on Wednesday and Thursday. Strengthening is expected during the next few days, and the system is forecast to become a hurricane on Wednesday. Helene is expected and continue strengthening into a major hurricane on Thursday, as it moves across the eastern Gulf of Mexico and towards the Big Bend region of Florida. The system is expected to have an unusually expansive wind field associated with it as it moves northward through the eastern Gulf, with tropical storm force winds extending out over 200 miles east of the center, likely reaching portions of the island chain. Expect frequent squalls across the Keys beginning tonight and continuing through Thursday or Thursday night. The strongest winds are forecast to occur Wednesday evening through midday Thursday, when wind gusts of 55 to 65 mph in squalls will be possible. Sustained tropical storm force winds of 40 mph or greater may arrive in the Lower Keys as early as Wednesday morning, but are most likely to arrive Wednesday evening. Storm surge flooding of 1 to 3 feet above ground level at the shore and lowest elevation areas will be possible throughout the Keys on Wednesday night and Thursday, and a Coastal Flood Watch is now in effect. Total rainfall amounts of 2 to 4 inches, with isolated totals up to 6 inches, will be possible from this afternoon through Friday, with the potential for some rainwater flooding of low lying spots. POTENTIAL IMPACTS ----------------- * WIND: Protect against hazardous wind having possible limited impacts across the Florida Keys. Potential impacts include: - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Some fences and roadway signs blown over. - A few roads impassable from debris, particularly within urban or heavily wooded places. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. * SURGE: Protect against locally hazardous surge having possible limited impacts across the Florida Keys. Potential impacts in this area include: - Localized inundation with storm surge flooding mainly along immediate shorelines and in low-lying spots, or in areas farther inland near where higher surge waters move ashore. - Sections of roads and parking lots inundated by surge water. Driving conditions dangerous in places where surge water covers the road. - Moderate beach erosion. - Minor to locally moderate damage to marinas, docks, boardwalks, and piers. A few small craft broken away from moorings. * FLOODING RAIN: Protect against locally hazardous rainfall flooding having possible limited impacts across the Florida Keys. Potential impacts include: - Flood waters can enter a few structures, especially in usually vulnerable spots. A few places where rapid ponding of water occurs at underpasses, low-lying spots, and poor drainage areas. Several storm drains and retention ponds become near-full and begin to overflow. Some brief road and bridge closures. PRECAUTIONARY/PREPAREDNESS ACTIONS ---------------------------------- * EVACUATIONS: Follow the advice of local officials. Refer to monroecountyem.com for the latest information. * OTHER PREPAREDNESS INFORMATION: Now is the time to complete all preparations to protect life and property in accordance with your emergency plan. Ensure you are in a safe location before the onset of strong winds or possible flooding. When making safety and preparedness decisions, do not focus on the exact forecast track since hazards such as flooding rain, damaging wind gusts, storm surge, and tornadoes extend well away from the center of the storm. If in a place that is vulnerable to high wind, such as near large trees, a manufactured home, or on a boat, consider moving to a safer shelter before the onset of strong winds or flooding. If you live in a place particularly vulnerable to flooding, such as in a low-lying or poor drainage area, plan to move to safe shelter on higher ground. When securing your property, outside preparations should be concluded as soon as possible before conditions deteriorate. The onset of strong gusty winds or flooding can cause certain preparedness activities to become unsafe. Closely monitor weather.gov, NOAA Weather radio or local news outlets for official storm information. Be ready to adapt to possible changes to the forecast. Ensure you have multiple ways to receive weather warnings. * ADDITIONAL SOURCES OF INFORMATION: - For Monroe County Emergency Management Information, see monroecountyem.com - For information on appropriate preparations see ready.gov - For additional disaster preparedness information see redcross.org - For Florida Division of Emergency Management information, see floridadisaster.org NEXT UPDATE ----------- The next local statement will be issued by the National Weather Service in Key West FL around 6 PM EDT, or sooner if conditions warrant.

HLSKEY This product covers the Florida Keys **Tropical Storm Warning is in effect for the Lower and Middle Keys** NEW INFORMATION --------------- * CHANGES TO WATCHES AND WARNINGS: - The Tropical Storm Watch has been upgraded to a Tropical Storm Warning for Monroe Middle Keys * CURRENT WATCHES AND WARNINGS: - A Tropical Storm Warning is in effect for Monroe Lower Keys and Middle Keys * STORM INFORMATION: - About 380 miles south-southwest of Key West FL - 19.7N 84.7W - Storm Intensity 50 mph - Movement West-northwest or 300 degrees at 12 mph SITUATION OVERVIEW ------------------ As of 5 PM EDT, Tropical Storm Helene was centered about 380 miles south-southwest of Key West, and is moving to the west-northwest near 12 mph. A northwestward motion is expected to continue tonight, followed by a faster northward to north-northeastward motion on Wednesday and Thursday. On the forecast track, the center of the system is forecast to move across the northwestern Caribbean Sea towards the Yucatan Peninsula through tonight, and then over the eastern Gulf of Mexico on Wednesday and Thursday. Strengthening is expected over the next thirty- six hours. The system is forecast to become a hurricane on Wednesday, and then become a major hurricane prior to landfall along the Big Bend region of Florida. The storm is expected to have an unusually expansive wind field associated with it as it moves northward through the eastern Gulf, with tropical storm force winds extending out over 200 miles east of the center. Expect frequent squalls across the Keys beginning tonight and continuing through Thursday or Thursday night. The strongest winds are forecast to occur Wednesday evening through midday Thursday, when wind gusts of 55 to 65 mph in squalls will be possible. Sustained tropical storm force winds of 40 mph or greater may arrive in the Lower and Middle Keys as early as Wednesday morning, but are most likely to arrive Wednesday evening. Storm surge flooding of 1 to 3 feet above ground level at the shore and lowest elevation areas is expected throughout the Florida Keys on Wednesday night and Thursday, and a Coastal Flood Warning is now in effect. Total rainfall amounts of 2 to 4 inches, with isolated totals up to 6 inches, will be possible from today through Friday, with the potential for some rainwater flooding of low lying spots. POTENTIAL IMPACTS ----------------- * WIND: Protect against hazardous wind having possible limited impacts across the Florida Keys. Potential impacts include: - Damage to porches, awnings, carports, sheds, and unanchored mobile homes. Unsecured lightweight objects blown about. - Many large tree limbs broken off. A few trees snapped or uprooted, but with greater numbers in places where trees are shallow rooted. Some fences and roadway signs blown over. - A few roads impassable from debris, particularly within urban or heavily wooded places. Hazardous driving conditions on bridges and other elevated roadways. - Scattered power and communications outages. * SURGE: Protect against locally hazardous surge having possible limited impacts across the Florida Keys. Potential impacts in this area include: - Localized inundation with storm surge flooding mainly along immediate shorelines and in low-lying spots. - Sections of roads and parking lots inundated by surge water. Driving conditions dangerous in places where surge water covers the road. - Moderate beach erosion. - Minor to locally moderate damage to marinas, docks, boardwalks, and piers. A few small craft broken away from moorings. * FLOODING RAIN: Protect against locally hazardous rainfall flooding having possible limited impacts across the Florida Keys. Potential impacts include: - Flood waters can enter a few structures, especially in usually vulnerable spots. A few places where rapid ponding of water occurs at underpasses, low-lying spots, and poor drainage areas. Several storm drains and retention ponds become near-full and begin to overflow. Some brief road and bridge closures. * TORNADOES: Protect against a tornado event having possible limited impacts across the Florida Keys. Potential impacts include: - A few places may experience tornado damage, along with power and communications disruptions. - Locations could realize roofs peeled off buildings, mobile homes pushed off foundations or overturned, large tree tops and branches snapped off, shallow-rooted trees knocked over, moving vehicles blown off roads, and small boats pulled from moorings. PRECAUTIONARY/PREPAREDNESS ACTIONS ---------------------------------- * OTHER PREPAREDNESS INFORMATION: Now is the time to complete all preparations to protect life and property in accordance with your emergency plan. Ensure you are in a safe location before the onset of strong winds or possible flooding. When making safety and preparedness decisions, do not focus on the exact forecast track since hazards such as flooding rain, damaging wind gusts, storm surge, and tornadoes extend well away from the center of the storm. If in a place that is vulnerable to high wind, such as near large trees, a manufactured home, or on a boat, consider moving to a safer shelter before the onset of strong winds or flooding. If you live in a place particularly vulnerable to flooding, such as in a low-lying or poor drainage area, plan to move to safe shelter on higher ground. When securing your property, outside preparations should be concluded as soon as possible before conditions deteriorate. The onset of strong gusty winds or flooding can cause certain preparedness activities to become unsafe. Closely monitor weather.gov, NOAA Weather radio or local news outlets for official storm information. Be ready to adapt to possible changes to the forecast. Ensure you have multiple ways to receive weather warnings. * ADDITIONAL SOURCES OF INFORMATION: - For Monroe County Emergency Management Information, see monroecountyem.com - For information on appropriate preparations see ready.gov - For additional disaster preparedness information see redcross.org - For Florida Division of Emergency Management information, see floridadisaster.org NEXT UPDATE ----------- The next local statement will be issued by the National Weather Service in Key West FL around 12 AM EDT, or sooner if conditions warrant.

* WHAT...Southeast to south winds increasing to 20 to 30 kt with gusts up to 40 kt. Seas building to 7 to 10 ft in the eastern Straits of Florida off the Upper Keys. * WHERE...Eastern Straits of Florida, Hawk Channel from Ocean Reef to Craig Key, and Florida Bay. * WHEN...In Effect. * IMPACTS...A Small Craft Advisory means that wind speeds of 20 to 33 knots, or seas of 7 feet or greater, are expected to produce hazardous conditions for small craft. These hazardous conditions may result in poor vessel handling and steering response, broaching, overturned dinghies and kayaks, slips and falls on slippery decks, rub damage along docks and seawalls, swamped bows at reef tract mooring balls, and dragging anchors.

* WHAT...Minor saltwater flooding will continue across the Florida Keys tonight through Wednesday afternoon, especially around the times of high tide. Major saltwater flooding of 1 to 3 feet above ground level at the shore and the lowest elevations is expected Wednesday evening through Thursday afternoon, with strong southeast to south winds impacting the Florida Keys, as Tropical Storm Helene moves northward through the eastern Gulf of Mexico and intensifies into a major hurricane. * WHERE...The Florida Keys. * WHEN...Through Thursday afternoon. * IMPACTS...Through Wednesday afternoon, minor saltwater flooding of low elevation streets and lots is likely, with little relief during low tide. Some storm drains will overflow, and some seawalls and docks will be overtopped. Boaters can expect less clearance under fixed bridges. Motorists should remember that persistent puddles around the times of high tide are almost certain to contain a mix of saltwater. For Wednesday evening through Thursday afternoon, storm surge flooding will cause numerous roads to be closed. Low lying property including homes, businesses, and some critical infrastructure will be inundated. Some shoreline erosion will occur. Some shoreline erosion will occur.