Hurricane Warning issued September 19 at 5:22AM AST

 

(CONTINUATION) Hurricane Warning issued September 19 at 5:22AM AST until further notice by NWS San Juan

Issued September 19 2017 5:22 AM by NWS San Juan (San Juan, Puerto Rico)
Recommended Response: None
How Soon
Responsive action SHOULD be taken within next hour
How Severe
Significant threat to life or property
How Likely
Likely to occur – Probability greater than 50%
Affects: Virgin Islands – St. John County, Virgin Islands – St. Thomas County

Summary

Expires: 9/19/2017 1:30 PM …HURRICANE WARNING REMAINS IN EFFECT…

* LOCATIONS AFFECTED- St Thomas St John and adjacent islands*

WIND- LATEST LOCAL FORECAST: Equivalent Strong Tropical Storm force wind- Peak Wind Forecast: 45-60 mph with gusts to 85 mph-

Window for Tropical Storm force winds: early this afternoon until

Wednesday evening- CURRENT THREAT TO LIFE AND PROPERTY: Extreme-

The wind threat has remained nearly steady from the previous assessment.-

Emergency plans should include a reasonable threat for major hurricane force wind greater than 110 mph of equivalent Category 3 intensity or higher.-

To be safe, aggressively prepare for the potential of devastating to catastrophic wind impacts. Remaining efforts to secure properties should now be brought to completion.-

Extremely dangerous and life-threatening wind is possible. Failure to adequately shelter may result in serious injury, loss of life, or immense human suffering. Move to safe shelter before the wind becomes hazardous.-

POTENTIAL IMPACTS: Devastating to Catastrophic- Widespread power outages with some areas experiencing long-term outages-

Many bridges and access routes connecting barrier islands impassable-

Structural category to sturdy buildings with some having complete wall and roof failures- Complete destruction of mobile homes- Numerous roads impassable from large debris*

STORM SURGE- LATEST LOCAL FORECAST: Life-threatening storm surge possible- Peak Storm Surge Inundation: The potential for 6-9 feet above ground somewhere within surge prone areas-

Window of concern: early this evening until early Wednesday evening- CURRENT THREAT TO LIFE AND PROPERTY: High- The storm surge threat has remained nearly steady from the previous assessment.-

Emergency plans should include a reasonable threat for major storm surge flooding of greater than 6 feet above ground.- To be safe, aggressively prepare for the potential of extensive storm surge flooding impacts. Evacuation efforts should now be brought to completion. Evacuations must be complete before driving conditions become unsafe.- Life-threatening inundation is possible. Failure to heed evacuation orders may result in serious injury, significant loss of life, or human suffering. Leave if evacuation orders are given for your area. Consider voluntary evacuation if recommended. Poor decisions may result inbeing cut off or needlessly risk lives.-

POTENTIAL IMPACTS: Extensive- Large areas of deep inundation with storm surge flooding accentuated by battering waves. Structural damage to buildings, with several washing away. Damage compounded by floating debris. Locations may be uninhabitable for an extended period.- Large sections of near-shore escape routes and secondary roads washed out or severely flooded. Flood control systems and barriers may become stressed.- Severe beach erosion with significant dune loss.-

Major damage to marinas, docks, boardwalks, and piers. Many small craft broken away from moorings, especially in unprotected anchorages with some lifted onshore andstranded.*

FLOODING RAIN- LATEST LOCAL FORECAST: Flash Flood Watch is in effect- Peak Rainfall Amounts: Additional 12-18 inches, with locally higher amounts-

CURRENT THREAT TO LIFE AND PROPERTY: Extreme- The flooding rain threat has remained nearly steady from the previous assessment.- Emergency plans should include a reasonable threat of extreme flooding where peak rainfall totals vastly exceed amounts conducive for flash flooding and rapid inundation. Rescues and emergency evacuations are very likely.-

To be safe, aggressively prepare for the potential of devastating to catastrophic flooding rain impacts.- Life-threatening flooding is possible. Failure to take action may result in serious injury, significant loss of life, or human suffering. If flood related watches and warnings are issued, heed recommended actions. Poor decisions may result in being cut off or needlessly risk lives. If vulnerable, relocate to safe shelter on higher ground before flood waters arrive.-

POTENTIAL IMPACTS: Devastating to Catastrophic- Extreme rainfall flooding may prompt numerous evacuations and rescues.- Rivers and tributaries may overwhelmingly overflow their banks in many places with deep moving water. Small streams, creeks, canals, arroyos, and ditches may become raging rivers. In mountain areas, deadly runoff may rage down valleys while increasing susceptibility to rockslides and mudslides. Flood control systems and barriers may become stressed.- Flood waters can enter numerous structures within multiple communities, some structures becoming uninhabitable or washed away. Numerous places where flood waters may cover escape routes. Streets and parking lots become rivers of raging water with underpasses submerged. Driving conditions become very dangerous. Numerous road and bridge closures with some weakened or washed out.*

TORNADO- LATEST LOCAL FORECAST:- Situation is favorable for tornadoes-

CURRENT THREAT TO LIFE AND PROPERTY: Moderate- The tornado threat has remained nearly steady from the previous assessment.- When implementing emergency plans, should include a reasonable threat for scattered tornadoes.-

To be safe, earnestly prepare for the potential of significant tornado impacts.- Listen for tornado watches and warnings. Be ready to shelter quickly if a tornado approaches.-

POTENTIAL IMPACTS: Significant- The occurrence of scattered tornadoes can hinder the execution of emergency plans during tropical events.- Several places may experience tornado damage with a few spots of considerable damage, power loss, and communications failures.- Locations could realize roofs torn off frame houses, mobile homes demolished, boxcars overturned, large trees snapped or uprooted, vehicles tumbled, and small boats tossed about. Dangerous projectiles can add to the toll.*

FOR MORE INFORMATION:- http://HTTP://WWW.SRH.NOAA.GOV/SJU/

ADDITIONAL INFORMATION CAN BE FOUND AT http://www.weather.gov

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