[Tropical] Hurricane Local Statement

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Hurricane Isaias Local Statement Advisory Number 28
National Weather Service Gray ME  AL092020
1138 PM EDT Mon Aug 3 2020

This product covers New Hampshire and western Maine

***HURRICANE ISAIAS EXPECTED TO AFFECT NEW HAMPSHIRE AND WESTERN
MAINE***

NEW INFORMATION
---------------

* CHANGES TO WATCHES AND WARNINGS:
    - None

* CURRENT WATCHES AND WARNINGS:
    - A Tropical Storm Warning is in effect for Belknap, Central
      Interior Cumberland, Cheshire, Coastal Cumberland, Coastal
      Rockingham, Coastal Waldo, Coastal York, Eastern Hillsborough,
      Interior Rockingham, Interior York, Knox, Lincoln, Merrimack,
      Sagadahoc, Strafford, and Western And Central Hillsborough
    - A Tropical Storm Watch is in effect for Androscoggin, Central
      Somerset, Interior Cumberland Highlands, Interior Waldo,
      Kennebec, Northern Carroll, Northern Coos, Northern Franklin,
      Northern Grafton, Northern Oxford, Southern Carroll, Southern
      Coos, Southern Franklin, Southern Grafton, Southern Oxford,
      Southern Somerset, and Sullivan

* STORM INFORMATION:
    - About 810 miles southwest of Portland ME or about 760 miles
      southwest of Portsmouth NH
    - 33.8N 78.5W
    - Storm Intensity 85 mph
    - Movement North-northeast or 20 degrees at 22 mph

SITUATION OVERVIEW
------------------

Isaias is expected to track quickly through western New England
Tuesday evening into the overnight. The majority of storm impacts will
be felt in roughly a 6 hour period Tuesday night.

Southerly winds are expected to increase in the early evening and gust
to 40 to 60 mph at times as Isaias tracks near the Connecticut River
Valley. This may be capable of downing some trees and power lines. In
addition, there will be a threat for isolated tornadoes on the eastern
side of Isaias. Winds will begin to diminish early Wednesday morning.
Rainfall totals of 1 to 3 inches are expected, mainly in the
Connecticut River Valley and White Mountains. This may lead to flash
flooding in complex terrain or poor drainage areas, in addition to
minor river flooding. Parts of the forecast area near the coast may
see less than 1 inch rainfall.

In general the coastal flood threat is low based on the speed of
Isaias, with any inundation likely less than a foot. Some splashover
is expected during the Tuesday night high tide however. Rough surf and
an increased risk for dangerous rip currents will be possible both
ahead of Isaias on Tuesday and behind it on Wednesday.

POTENTIAL IMPACTS
-----------------

* WIND:
Protect against hazardous wind having possible limited impacts across
New Hampshire and western Maine. 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, leading to downed power lines.
    - A few roads impassable from debris, caused by downed branches
      and power lines. Hazardous driving conditions on bridges and
      other elevated roadways.
    - Scattered power and communications outages likely.

* SURGE:
Little or no inundation flooding is expected, but splashover and beach
erosion is expected around the time of high tide Tuesday night.

* FLOODING RAIN:
Protect against dangerous rainfall flooding having possible
significant impacts across the Connecticut River Valley and White
Mountains into the western Maine mountains. Potential impacts include:
    - 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, canals, and
      ditches will 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
      will become hazardous. Some road and bridge closures.

Protect against locally hazardous rainfall flooding having possible
limited impacts across southern New Hampshire and coastal western
Maine.

* TORNADOES:
Protect against a tornado event having possible limited impacts
across southern and central New Hampshire and southwestern Maine.
Potential impacts include:
    - The occurrence of isolated tornadoes can hinder the execution
      of emergency plans during tropical events.
    - A few places may experience tornado damage, along with power
      and communications disruptions.
    - Locations could realize roofs peeled off buildings, chimneys
      toppled, 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
----------------------------------

* EVACUATIONS:
If evacuating away from the area or relocating to a nearby shelter,
leave early before weather conditions become hazardous. Listen to
local officials for recommended preparedness actions, including
possible evacuation.

* OTHER PREPAREDNESS INFORMATION:
Now is the time to bring to completion all preparations to protect
life and property in accordance with your emergency plan.

Outside preparations should be wrapped up as soon as possible before
weather conditions completely deteriorate.

Check-in with your emergency points of contact among family, friends,
and workmates. Inform them of your status and well-being. Let them
know how you intend to ride out the storm and when you plan to
check-in again.

Keep cell phones well charged and handy. Also, cell phone chargers
for automobiles can be helpful after the storm. Locate your chargers
and keep them with your cell phone.

In emergencies it is best to remain calm. Stay informed and focused
on the situation at hand. Exercise patience with those you encounter.
Be a Good Samaritan and helpful to others.

If relocating to a nearby shelter or to the home of a family member
or friend, drive with extra caution, especially on secondary roads.
Remember, many bridges and causeways will be closed once higher winds
arrive. Also, if you encounter water covering the road, seek an
alternate route. Always obey official road signs for closures and
detours.

If you are a visitor and still in the area, listen for the name of
the city or town in which you are staying within local news updates.
Be sure you know the name of the county or parish in which it
resides. Pay attention for instructions from local authorities.

Closely monitor NOAA Weather radio or other local news outlets for
official storm information. Be ready to adapt to possible changes to
the forecast.

* ADDITIONAL SOURCES OF INFORMATION:
- For information on appropriate preparations see ready.gov
- For information on creating an emergency plan see getagameplan.org
- For additional disaster preparedness information see redcross.org

NEXT UPDATE
-----------

The next local statement will be issued by the National Weather
Service in Gray ME around 8 AM EDT, or sooner if conditions warrant.

$$

Legro
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