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Friday, August 20, 2021

Henri is no joke - Charlestown under Hurricane Watch

Landfill point now between Newport and Westerly (gulp!)

By Will Collette


Big storms are notorious for changing direction and intensity. So it is with Henri, currently a tropical storm, will likely approach as a Category 1 Hurricane but, according to current forecasts make landfall here as a tropical storm.

The National Hurricane Center is currently saying the earliest reasonable time of arrival is around 8 PM Saturday and the most likely time is Sunday morning. 

Pay close attention to weather news for our area, take your own precautions by securing objects that could be caught up in the wind and follow instructions from emergency management authorities.

Current Charlestown forecast:


Here is the text of the National Weather Service warning:

Hurricane Watch

Henri Local Watch/Warning Statement/Advisory Number 18
National Weather Service Boston/Norton MA  AL082021
522 AM EDT Fri Aug 20 2021

RIZ006-201730-
/O.CON.KBOX.SS.A.1008.000000T0000Z-000000T0000Z/
/O.CON.KBOX.HU.A.1008.000000T0000Z-000000T0000Z/
Washington RI-
522 AM EDT Fri Aug 20 2021

...HURRICANE WATCH REMAINS IN EFFECT...
...STORM SURGE WATCH REMAINS IN EFFECT...

* LOCATIONS AFFECTED
    - Narragansett
    - Westerly

* WIND
    - LATEST LOCAL FORECAST: Equivalent Tropical Storm force wind
        - Peak Wind Forecast: 30-40 mph with gusts to 55 mph
        - Window for Tropical Storm force winds: early Sunday morning
          until Monday morning

    - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
      UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for wind 58
      to 73 mph
        - PLAN: Plan for dangerous wind of equivalent strong tropical
          storm force.
        - PREPARE: Efforts to protect life and property should now be
          underway. Prepare for significant wind damage.
        - ACT: Act now to complete preparations before the wind
          becomes hazardous.

    - POTENTIAL IMPACTS: Significant
        - Some damage to roofing and siding materials, along with
          damage to porches, awnings, carports, and sheds. A few
          buildings experiencing window, door, and garage door
          failures. Mobile homes damaged, especially if unanchored.
          Unsecured lightweight objects become dangerous projectiles.
        - Several large trees snapped or uprooted, but with greater
          numbers in places where trees are shallow rooted. Several
          fences and roadway signs blown over.
        - Some roads impassable from large debris, and more within
          urban or heavily wooded places. A few bridges, causeways,
          and access routes impassable.
        - Scattered power and communications outages, but more
          prevalent in areas with above ground lines. Like Charlestown. 
If you still have power for your electronic devices with internet access, 
you can check National Grid's map for power outages HERE.

* STORM SURGE
    - LATEST LOCAL FORECAST: Life-threatening storm surge possible
        - Peak Storm Surge Inundation: The potential for 3-5 feet
          above ground somewhere within surge prone areas
        - Window of concern: Around high tide

    - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
      UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for storm
      surge flooding greater than 3 feet above ground
        - PLAN: Plan for life-threatening storm surge flooding of
          greater than 3 feet above ground.
        - PREPARE: Storm surge flooding preparations should be
          underway. Assemble disaster supplies and know your
          evacuation route.
        - ACT: Leave if evacuation orders are given for your area.
          Failure to heed evacuation orders may result in the loss of
          your life.

    - POTENTIAL IMPACTS: Significant
        - Areas of inundation with storm surge flooding accentuated
          by waves. Damage to several buildings, mainly near the
          coast.
        - Sections of near-shore escape routes and secondary roads
          become weakened or washed out, especially in usually
          vulnerable low spots.
        - Major beach erosion with heavy surf breaching dunes. Strong
          and numerous rip currents.
        - Moderate damage to marinas, docks, boardwalks, and piers.
          Several small craft broken away from moorings, especially
          in unprotected anchorages.

* FLOODING RAIN
    - LATEST LOCAL FORECAST:
        - Peak Rainfall Amounts: 2-4 inches, with locally higher
          amounts

    - THREAT TO LIFE AND PROPERTY THAT INCLUDES TYPICAL FORECAST
      UNCERTAINTY IN TRACK, SIZE AND INTENSITY: Potential for
      moderate flooding rain
        - PLAN: Emergency plans should include the potential for
          moderate flooding from heavy rain. Evacuations and rescues
          are possible.
        - PREPARE: Consider protective actions if you are in an area
          vulnerable to flooding.
        - ACT: Heed any flood watches and warnings. Failure to take
          action may result in serious injury or loss of life.

    - POTENTIAL IMPACTS: Significant
        - Moderate rainfall flooding may prompt several evacuations
          and rescues.
        - Rivers and tributaries may quickly become swollen with
          swifter currents and overspill their banks in a few places,
          especially in usually vulnerable spots. Small streams,
          creeks, and ditches overflow.
        - Flood waters can enter some structures or weaken
          foundations. Several places may experience expanded areas
          of rapid inundation at underpasses, low-lying spots, and
          poor drainage areas. Some streets and parking lots take on
          moving water as storm drains and retention ponds overflow.
          Driving conditions become hazardous. Some road and bridge
          closures.
Here's the most detailed graphic I could find showing the likely arrival time and location.

And here's a closeup