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New Hampshire, Eastern Hillsborough

Severe Thunderstorm Watch

Statement as of 7:43 PM EDT on August 04, 2015

Expires 8:00 PM EDT on August 04, 2015


Severe Thunderstorm Watch 469 remains in effect until 800 PM EDT

NH
. New Hampshire counties included are

Belknap Carroll Cheshire
Coos Grafton Hillsborough
Merrimack Rockingham Strafford
Sullivan


Public Information Statement

Statement as of 4:09 PM EDT on August 04, 2015


... Microburst /straight line wind damage/ confirmed near
Lancaster in Coos County New Hampshire...

Location... Lancaster in Coos County New Hampshire
date... August 3rd 2015
estimated time... 543 PM EDT
estimated maximum wind speed... 55-60 mph with gusts to 75 mph
maximum path width... 100 yards
path length... 1.5 miles
beginning lat/Lon... 44.496 / 71.594
ending lat/Lon... 44.512 / 71.569
* fatalities... 2
* injuries... 15-20

* the information in this statement is preliminary and subject to
change pending final review of the event(s) and publication in
NWS storm data.

... Summary...
the National Weather Service in Gray ME has confirmed a
microburst /straight line wind damage/ near Lancaster in Coos
County New Hampshire on 08 03 2015.

The National Weather Service conducted a storm survey to
determine the cause of winds that resulted in two fatalities,
numerous injuries, and damage in the vicinity of the Lancaster New
Hampshire Fairgrounds at approximately 543 PM EDT on the evening
of August 3rd. Areal and ground surveys confirmed damage
consistent with a microburst. Numerous softwood trees were both
blown over and snapped while no structural damage occurred to
buildings. This type of damage is consistent with winds speeds of
55-60 mph with localized gusts approaching 75 mph. Most of the
tree damage occurred along and adjacent to the Connecticut River.

The National Weather Service would like to thank the New Hampshire
department of Homeland security and emergency management, New
Hampshire State Police, and Lancaster emergency management for
assisting in this survey.

This information can also be found on our website at
weather.Gov/gyx.

For reference...
a microburst is a convective downdraft with an affected outflow
area of less than 2 1/2 miles wide and peak winds lasting less
than 5 minutes. Microbursts may induce dangerous
horizontal/vertical wind shears... which can adversely affect
aircraft performance and cause property damage. Straight-line
winds are generally any wind that is not associated with
rotation... used mainly to differentiate them from tornadic winds.


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