major winter storm - ashland, new hampshire storm update 3_31.pdfperiod of greatest impact: friday...
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Gray, ME Weather Forecast Office
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3/30/2017 4:44 PM
Major Winter
Storm Decision Support Briefing # 1
As of: 5 PM Thursday, March 30th
What Has Changed? Initial briefing
Winter Storm
Warning
Winter Storm Watch
Gray, ME Weather Forecast Office
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Main Points
Hazard Impacts Location Timing
Snow Areas with significant
accumulations of wet snow will
likely have power outages
Greatest threat across
southern and central
New Hampshire
Friday into Saturday
(see map for onset and end times)
Ice Significant icing is NOT
expected Significant icing is NOT
expected
Significant icing is NOT
expected
Wind
Inland winds 5 to 10 mph.
Coastal winds 10 to 15 mph with
gusts to 30 mph. May contribute
to power outages along coast
All of New Hampshire
and Western Maine,
but strongest along the
coast
Strongest wind gusts Friday night and Saturday
Storm Surge/
Inundation Minor coastal flooding possible
New Hampshire
Seacoast and SW and
Midcoast Maine
Friday night high tide
Marine Gust up to 30 to 35 kts
Strongest gusts outside
the bays Friday night and Saturday
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Ice: None Expected
Strongest Winds: Along the Coast
Surge/Inundation: Greatest South of Portland
Marine: Strong Winds Especially Outside the Bays
Heavy Snow: Western Maine and NH
None Limited Elevated Significant Extreme
Summary of Greatest Impacts
None Limited Elevated Significant Extreme
None Limited Elevated Significant Extreme
None Limited Elevated Significant Extreme
None Limited Elevated Significant Extreme
Gray, ME Weather Forecast Office
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Storm Confidence: Confidence is high that
winter storm will impact area
Considerable uncertainty in
precipitation type and
snowfall amounts
Find the most up to date
snowfall map, click here
Gray, ME Weather Forecast Office
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Expect at least this much Potential for this much
Most Likely
Probabilistic Snowfall Forecast
Gray, ME Weather Forecast Office
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Snow Starting & Ending Times
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What to Expect: No significant issues
expected
Portland, ME Hampton, NH
Time 2:43 AM Saturday 2:57 AM Saturday
Astronomical
Tide
11.0 ft 10.0 ft
Storm Surge Around 1 ft Around 1 ft
Nearshore
Waves
Near 5 ft Near 5 ft
Impact Minor coastal
flooding possible
Friday night
Minor coastal
flooding possible
Friday night
Coastal Impacts Monday
Gray, ME Weather Forecast Office
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3/30/2017 4:44 PM
Winter Storm likely Friday into Saturday.
Confidence is HIGH that this event will occur and MODERATE on
precipitation type and expected impacts.
Period of greatest impact: Friday night – Saturday morning
The potential exists up to a foot of wet snow, mainly in southern
New Hampshire
Wind gusts along coast may contribute to power outages
Minor coastal flooding possible Friday night
Event Summary
Gray, ME Weather Forecast Office
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3/30/2017 4:44 PM
Contact and Next Briefing Information
Briefing Webpage:
http://www.weather.gov/gyx/EMhome
Next Briefing When: By 9 am on 3/31/2017
Method: E-mail
Web:
http://weather.gov/gyx
Phone (public):
(207) 688-3216
E-mail:
Facebook:
NWSGray
Twitter:
@NWSGray
YouTube:
NWS
Disclaimer: The information contained within this briefing
is time-sensitive, do not use after 9 AM March 31