Massachusetts, 2017

Winter Storm and Flooding in Massachusetts, April 1, 2017

April 1, 2017 · NWS BOX · 6 events in 6 counties and zones

Low pressure from the Midwest passed offshore south and east of Massachusetts. This brought a period of snow to Southern New England, starting the morning of April 1st and lasting until the evening.

Where it happened

Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
$15,000
Crop damage
None recorded
Events
6

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS BOX wrote it up.

Low pressure from the Midwest passed offshore south and east of Massachusetts. This brought a period of snow to Southern New England, starting the morning of April 1st and lasting until the evening. Strong wind gusts were recorded on Cape Ann, Cape Cod, and the Islands.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before the first event at Apr 1, 6:08 AM EST, 2 hours 22 minutes earlier.

Area forecast discussion, Apr 1, 6:08 AM EST, 2 hours 22 minutes before
Area Forecast Discussion
National Weather Service Taunton MA
708 AM EDT Sat Apr 1 2017

.SYNOPSIS...
Colder air will move south later today, changing rain and wintry
mix back to snow in many areas before it tapers off. Low
pressure moves east of Nantucket this afternoon. High pressure
brings dry weather Sunday and Monday. A new storm approaches
from Texas on Tuesday with rain and a chance of sleet inland.
Another storm may affect Southern New England late Thursday and
Friday.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

7 am update...

Low pressure south of Block Island will continue to move east
this morning. Extrapolating its movement would bring it east of
Nantucket around 18Z/2 PM. As it does so, winds will turn from
the north and draw colder air south across our region. With
borderline temperatures, such cooling should be enough to change
the rain to snow/sleet, especially across the North
Shore/Merrimack Valley, possibly the Boston Metrowest.

Note that 6 am temps were frequently 2F milder than forecast.
This may change as the colder air moves in. Also note winds
increasing on Cape Cod and Islands with gusts up to 50 mph. This
will continue to be a concern through the morning.

We have made adjustments to temps and dew points. The forecast
of additional snow looks good, although accumulations near the
coast may be more on grassy surfaces than on paved areas.

Previous discussion...

* Sleet/Rain Changes Back to Snow Over Next Few Hours *

Overview...
Low pres has already dropped below 1000mb as of 3AM per latest
MSAS data and is now about 100sm S of the Forks of Long Island.
This has had two primary impacts. Dry air is already spilling
into the W reaches of New England and E NY as trowal/CCB
continues development. Meanwhile, per 0.5 degree CC product,
warm air intrusion is starting to once again pivot slowly S, and
will accelerate as the low deepens and passes closer over the
next few hours. Therefore, outside ft DZ/FZDZ in the dry air
from the Worcester Hills W, a gradual shift from rain/sleet mix
elsewhere will give way back to SN as trowal/deformation banding
picks up.

Precipitation...
Mix snow/sleet will gradually give way back to SN. This has
already started in Essex CO, and will gradually shift SSW with
time through mid morning. Noting signature for decent banding
given nearly 15microbars/sec lift in the dendrite zone
especially across N/NE MA, typical of a comma-head on deepening
low pres. This is likely to yield some periods of 1-2 inch per
hour snowfall rates, as far S as the Boston metro. For the
immediate coast though (the city of Boston included)
accumulation on roads may be limited due to warm intrusion of
marine flow unless these higher rates are fully realized. This
will need to be watched.

Overall, mod/hvy SN can be expected at times especially N of
the Pike and across NE MA. This may overcome the temps near or
even above 0C at the SFC thanks to dynamic cooling. Therefore,
especially form the Worcester Hills E, the bulk of the snowfall
is still yet to come, and, although still generally wet, SLRs
will be a bit higher with this SN. Elsewhere, it will be a race
between diurnal warming and crashing heights this morning which
will ultimately determine both precip types and amounts yet to
fall. This will be especially true for areas S of the Mass Pike
where additional light snow cannot be ruled out, along with a
low risk for some sleet before ending given the gradual cooling
of the lowest levels prior to the cooling of the warm layer
between H85 and H7.

Given that more SN is expected where warnings currently sit,
will maintain headlines through the morning, allowing day shift
to get another look as the low pres passes and then transitions
out to sea. As much as another 6-8 inches are still possible
particularly from N Worcester CO E into Essex CO.

Winds...
Easterlies will be picking up early this morning as low pres
continues to deepen toward the SE coast. Strongest gusts, mainly
50-60 mph are expected across Nantucket as well as the SE
extremities of Cape Cod. This first round of winds drops off
late morning but gives way to another round of stronger N-NW
late this afternoon and evening in the dry intrusion/cold and
strong pres rises on the back side of the low pres. Another
round of 50-60 mph gusts possible Cape/Nantucket so will be
upgrading to a wind advisory there. 40-50 mph gusts also
possible across SE MA/RI with this second round, so wind
advisories continue inland.

Impacts...
The combination of accumulating sleet/fzra overnight will
continue to lead to slippery roadways this morning. This will
only be exacerbated by the gradual return to all frozen
precipitation as comma-head/trowal banding sets up. Therefore,
maintaining the Warnings/Advisories are warranted. The heavy
sleet/freezing rain could also exacerbate risk for power outages
inland in spite of lesser additional snowfall. Meanwhile, across
NE MA Mod-heavy wet snowfall returning will lead to an even
higher risk for downed trees/wires, and this will likely be the
area to watch especially through this afternoon as 1-2 inch per
hour snowfall rates cannot be ruled out, along with gusty ENE
winds.

Otherwise, strong winds Cape/Islands, although amongst mostly
rain could still yield some tree damage and power outages,
especially given the wet soils where total QPF by storm's end
may exceed 2.00 inches.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM SUNDAY/...
Overnight...
Precipitation of all forms should end across E MA/RI between 21Z
and 00Z (5PM and 8PM local), but may linger across the
Cape/Islands a shade longer, but mainly as rain due to strong
marine influence. Strong winds will recede through the evening
and shift W. Although, some clouds may linger early in the
night as moisture remains trapped beneath a building subsidence
inversion. Therefore, this will limit cooling unless clouds
break earlier than currently forecast. Expecting mins mainly in
the upper 20s and low 30s. Will need to watch for patchy ice
where winds are unable to dry out wet area roadways. This is
most likely across E MA/RI where precipitation lingers later in
the day today.

&&

.LONG TERM /SUNDAY THROUGH FRIDAY/...
Big Picture...

Weak longwave trough over the Northeast USA flattens closer to zonal
by late next week.  Two southern shortwaves move through this flow
past New England next week, one on Tuesday and the second on Friday.

Models show a general agreement on these trends through Tuesday,
then differences in timing and placement on the shortwaves and
surface systems Tuesday evening through Friday. We used a blend to
average out these differences.

Details...

Sunday-Monday...

High pressure builds over the region. A northern stream shortwave
actually dips in on Sunday with cold air aloft. That combined with
solar heating of the surface and lingering moisture below 850 mb
will mean diurnal mixing and cloud formation. Skies then clear out
Sunday evening. Winds in the mixed layer Sunday reach 20-25 knots,
which will be available as northwest wind gusts at the surface.
Temps in the mixed layer support mid 40s to lower 50s.

Clearing skies and light winds for Sunday night will allow
radiational cooling. With dew points in the mid and upper 20s, min
temps of 25-35 are reasonable.

High pressure still overhead much of Monday, but shifts offshore
toward evening. Overall a dry day with temps aloft supporting max
sfc temps of 45-55. Developing southwest flow aloft will start to
bring some high clouds late in the day.

Monday night-Tuesday...

Shortwave and surface system from Texas Sunday night will move
through the Midwest Monday night and into the Northeast on Tuesday.
Low level south winds increase over the Ohio Valley Monday afternoon
and then shift to the East Coast Monday night after midnight. This
will bring increasing moisture and generate isentropic lift as it
moves over the colder air in place over us. We bring in likely pops
after midnight.

Surface winds from the south should keep most places above freezing.
With the surface high shifting out to sea, there is no significant
signal of cold air damming inland. However low level ageostropic
winds inland are forecast at 40-45 knots from the north, leaving a
concern that some cold surface air may drain into our northern
areas.  We are indicating a chance of sleet or freezing rain in
parts of Western and Central Mass, mainly north of the Mass Pike.

Winds turn from the east on Tuesday with south winds above that and
strong isentropic lift indicated through much of the day. We will
show categorical pops for rain. Precipitable water values are
indicated to reach at least 1 inch, possibly 1.25 inches. These
values are well above average.  For that matter they are above the
90 percent value for the date. This indicates potential for a
soaking rain on Tuesday. Winds in the low level jet reach 60-65
knots at 2000-3000 feet AGL. This suggests wind gusts in any heavier
downpours may reach 35-40 knots.

One concern is the handling of the surface low on Tuesday by the
GFS. The 00Z run shows the primary surface low moving west-east
across NY and VT to near Portsmouth New Hampshire. This might be due
to a shallower depiction of the upper shortwave.  The 00Z ECMWF
redevelops the low along the Long Island coast and slides it around
SE Mass early Tuesday night. Tend to favor the ECMWF handling, but
as it is 96 hours out there is time for this to change.  Expect a
cloudy wet day with strong gusty ESE winds along the coast.

The low moves off through the Gulf of Maine Tuesday night, at which
time the rain should taper off from west to east.

Wednesday through Friday...

High pressure surface and aloft build overhead Wednesday and
Wednesday night. Expect dry weather during this time. Temps aloft
support max temps in the upper 40s and 50s.

Another weather system comes out of the Southern Plains midweek. The
long range models are showing a higher amplitude flow mid-late week,
and thus a slower progression of this later weather system. Current
consensus brings the system to New England from late Thursday
through Friday. If there is any cold air damming at that time, it is
not showing well in the data. But this is also seven days in the
future with time to evolve.  We expect another rainy forecast for
late Thursday-Friday.

&&

.AVIATION /12Z SATURDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Tonight/...

Through 18Z...Moderate confidence.
Mostly IFR conditions across the region with some MVFR in
Western Mass. Mix of RA/PL this morning will gradually give way
to SN from N-S through mid day. Some accumulations of SN/PL are
likely especially N of the Mass Pike from Worcester County MA
to the E. Expect lesser amounts along the immediate coast,
especially Boston to Gloucester. Some lighter accums further S.
E to NE winds increase with time, reaching 20-30 kt inland then
40-50 kt mainly SE MA.

18Z this afternoon through tonight...Moderate confidence.
High confidence in TAF trends lower confidence in timing. Last
remnant SN/RA comes to an end from W-E through 00Z, lingering
longest over Cape/Nantucket. MVFR conditions linger thanks to
low CIGS past 00Z for many although some improvement especially
W MA/CT are possible. N-NW wind gusts increase during the late
afternoon/evening especially Cape/Islands where another round of
45-55 kt are possible.

KBOS Terminal...Moderate confidence in TAF. Change back to SN is
expected but timing may be off in TAF.

KBDL Terminal...Moderate confidence in TAF.

Outlook /Sunday through Wednesday/...

Sunday-Monday...

VFR. Northwest winds Sunday may gust to 25 knots. Winds become light
and variable Monday.

Monday night and Tuesday...

Lowering cigs Monday night, especially after midnight. MVFR-IFR cigs
and vsbys expected after midnight and through the day Tuesday.
Pockets of snow/sleet/freezing rain possible initially in Northern
Mass and along the East Slopes of the Berkshires, but should change
to rain during Tuesday. East-Southeast winds at the surface. Strong
east winds expected at 2000 feet AGL with speeds of 60-65 knots.
This would lead to low level wind shear in the coastal plain.

Tuesday night-Wednesday...Rain tapers off Tuesday night. Conditions
improving to VFR from west to east by Wednesday.  North-northeast
winds along the coast with gusts near 25 knots.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.

Short Term /through Tonight/...

Today...High confidence. E winds continue to increase this
morning with the expectation for gusts around 50-55 kt across SE
open waters. Storm Warnings continue there with Gales elsewhere
with gusts 35-45 kt. A brief lull is possible before winds
shift to the N this afternoon and increase once again to near
storm force.

Gale force gusts drop rapidly overnight tonight, but small craft
advisory for lingering N-NW winds and very high seas will still
be needed even as Gales end.

Outlook /Sunday through Wednesday/...

Sunday through Monday...

Northwest gusts to 25 knots Sunday.  These diminish late in the day
as high pressure moves over the waters. Seas remain above 5 feet on
the eastern exposed waters during the day but diminish late Sunday
and Sunday night. Small Craft advisories will be needed Sunday.

On Monday lingering 5-foot seas on the outer waters will diminish by
afternoon. Winds will be less than 20 knots through the day.

Monday night through Wednesday...

Winds increase from the south and southeast Monday night, reaching
25-30 knots early Tuesday south of RI. Southeast winds continue to
build on Tuesday, reaching 35 knots on most of the waters. Winds
turn from the north Tuesday night and northwest Wednesday with
speeds diminishing to 25-30 knots. Seas build to 5-10 feet
Tuesday, then subside Wednesday. A Gale Warning may be needed
for Tuesday.

&&

.TIDES/COASTAL FLOODING...
The Coastal Flood Advisory remains in effect for east and
northeast facing shorelines south of Boston for the afternoon
high tide. Anticipate a surge of 1.5 to 2 feet along the
Plymouth County coast, Nantucket and the east/northeast sides of
Martha's Vineyard. This has been slightly increased given a
higher than predicted surge with the early morning high tide
this morning. However, even with this increase, current location
of Coastal Flood Advisory is good for this afternoon, so will
not be making changes with this morning's update.

Waves of about 10 to 15 feet are expected into Massachusetts
Bay and 14 to 18 feet east of Cape Cod and east of Nantucket
during the this afternoon. The combination of surge and waves
will likely cause areas of minor coastal flooding from Hull to
Plymouth to Dennis, Nantucket Harbor area, and possibly at some
spots along the Vineyard shore. In addition, we expect some
erosion as well, especially along the ocean side of Cape Cod and
the east side of Nantucket. At the very least, there could be
some isolated splashover north of Boston at the time of high
tide but do not expect any significant impact.

We still may need to issue a Coastal Flood Advisory for
portions of the Massachusetts east coast for the early Sunday
morning high tide but have not done so yet, since there is
enough time for changes in the intensity and timing of the
storm through the day today. As of now, winds do not really
turn offshore until after the time of the high tide Sunday
morning and hence may see a residual surge of 1.0 to 1.5 feet.
The surge in addition to a long period swell may be enough to
cause an additional round minor coastal flooding and erosion for
east, northeast, and north facing shorelines south of Boston.
Experimental wave run- up guidance is also showing a risk for
erosion and minor overwash along the Plymouth County coast
during the Sunday early morning high tide.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Winter Weather Advisory until 11 AM EDT this morning for
     CTZ002>004.
MA...Wind Advisory until 8 PM EDT this evening for MAZ013-016>021-
     023.
     Coastal Flood Advisory from 2 PM this afternoon to 6 PM EDT
     this evening for MAZ019-022>024.
     Winter Storm Warning until 4 PM EDT this afternoon for
     MAZ002>008-010-012-014-015-026.
     Winter Weather Advisory until 4 PM EDT this afternoon for
     MAZ013-016.
     Winter Weather Advisory until 11 AM EDT this morning for
     MAZ009-011.
     High Wind Warning until 8 PM EDT this evening for MAZ022-024.
RI...Wind Advisory until 8 PM EDT this evening for RIZ002>008.
     Winter Weather Advisory until 4 PM EDT this afternoon for
     RIZ001.
MARINE...Storm Warning until 8 PM EDT this evening for ANZ232-254>256.
     Gale Warning until 11 PM EDT this evening for ANZ231-233>235-
     237.
     Gale Warning until 8 PM EDT this evening for ANZ230-236.
     Gale Warning until midnight EDT tonight for ANZ250-251.

&&

SYNOPSIS...WTB/Doody
NEAR TERM...WTB/Doody
SHORT TERM...Doody
LONG TERM...WTB
AVIATION...WTB/Doody
MARINE...WTB/Doody
TIDES/COASTAL FLOODING...
Hazardous weather outlook, Apr 1, 3:07 AM EST, 5 hours 23 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
407 AM EDT Sat Apr 1 2017

MAZ002>008-010-012-014-015-026-020815-
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Western Hampshire MA-Eastern Hampshire MA-Southern Worcester MA-
Southeast Middlesex MA-Suffolk MA-Northern Middlesex MA-
407 AM EDT Sat Apr 1 2017

...WINTER STORM WARNING IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for central Massachusetts,
eastern Massachusetts, northeastern Massachusetts and western
Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Storm Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

A winter mix of precipitation is also expected in Northwest
Massachusetts on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

CTZ002>004-MAZ009-011-020815-
Hartford CT-Tolland CT-Windham CT-Western Hampden MA-
Eastern Hampden MA-
407 AM EDT Sat Apr 1 2017

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 AM EDT THIS MORNING...

This Hazardous Weather Outlook is for northern Connecticut and
western Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MAZ017-018-020-021-RIZ002>008-020815-
Northern Bristol MA-Western Plymouth MA-Southern Bristol MA-
Southern Plymouth MA-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-Washington RI-Newport RI-Block Island RI-
407 AM EDT Sat Apr 1 2017

...WIND ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts,
northern Rhode Island and southern Rhode Island.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MAZ022-020815-
Barnstable MA-
407 AM EDT Sat Apr 1 2017

...HIGH WIND WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM
EDT THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Warning.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There is a low risk of strong easterly winds on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MAZ023-020815-
Dukes MA-
407 AM EDT Sat Apr 1 2017

...WIND ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM
EDT THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There is a low risk of strong easterly winds on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MAZ024-020815-
Nantucket MA-
407 AM EDT Sat Apr 1 2017

...HIGH WIND WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 6 AM EDT EARLY THIS
MORNING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM
EDT THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   High Wind Warning.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

There is a low risk of strong easterly winds on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

RIZ001-020815-
Northwest Providence RI-
407 AM EDT Sat Apr 1 2017

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for northern Rhode Island.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MAZ013-016-020815-
Western Norfolk MA-Eastern Norfolk MA-
407 AM EDT Sat Apr 1 2017

...WIND ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 4 PM EDT THIS AFTERNOON...

This Hazardous Weather Outlook is for eastern Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Winter Weather Advisory.
   Wind Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

MAZ019-020815-
Eastern Plymouth MA-
407 AM EDT Sat Apr 1 2017

...COASTAL FLOOD ADVISORY IN EFFECT UNTIL 5 AM EDT EARLY THIS
MORNING...
...WIND ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 2 PM THIS AFTERNOON TO 6 PM
EDT THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Wind Advisory.
   Coastal Flood Advisory.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

ANZ232-254>256-020815-
Nantucket Sound-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
407 AM EDT Sat Apr 1 2017

...STORM WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for Massachusetts coastal waters
and Rhode Island coastal waters.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Storm Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

In addition, there is a low risk of East-Northeast gales on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

ANZ250-251-020815-
Coastal waters east of Ipswich Bay and the Stellwagen Bank National
Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
407 AM EDT Sat Apr 1 2017

...GALE WARNING IN EFFECT UNTIL MIDNIGHT EDT TONIGHT...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Gale Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

In addition, there is a low risk of East-Northeast gales on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

ANZ231-233>235-237-020815-
Cape Cod Bay-Vineyard Sound-Buzzards Bay-Rhode Island Sound-
Block Island Sound-
407 AM EDT Sat Apr 1 2017

...GALE WARNING IN EFFECT UNTIL 11 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for Massachusetts coastal waters
and Rhode Island coastal waters.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Gale Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

In addition, there is a low risk of East-Northeast gales on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

ANZ230-236-020815-
Boston Harbor-Narragansett Bay-
407 AM EDT Sat Apr 1 2017

...GALE WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for Massachusetts coastal waters
and Rhode Island coastal waters.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Gale Warning.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

In addition, there is a low risk of East-Northeast gales on Tuesday.

.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.

For the latest updates...please visit our webpage at
www.weather.gov/boston

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston

In the hours before

Local storm report, Apr 1, 7:24 AM EST, 1 hour 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MA
824 AM EDT SAT APR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0630 AM     SNOW             1 W WEST TOWNSEND       42.68N  71.75W
04/01/2017  M5.0 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0645 AM     SNOW             1 ESE MAYNARD           42.42N  71.44W
04/01/2017  M2.0 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             1 SW LEXINGTON          42.44N  71.24W
04/01/2017  M2.4 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             4 SSW WILBRAHAM         42.09N  72.47W
04/01/2017  M1.5 INCH        HAMPDEN            MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             1 SW ACTON              42.47N  71.48W
04/01/2017  M2.6 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             1 ENE NORTH GRANBY      42.02N  72.82W
04/01/2017  M1.8 INCH        HARTFORD           CT   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             LEXINGTON               42.44N  71.24W
04/01/2017  M2.4 INCH        MIDDLESEX          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0700 AM     SNOW             1 WSW WILLIAMSBURG      42.39N  72.74W
04/01/2017  M3.5 INCH        HAMPSHIRE          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             3 NW CONWAY             42.54N  72.73W
04/01/2017  M4.0 INCH        FRANKLIN           MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             2 S BOXFORD             42.64N  70.98W
04/01/2017  M3.0 INCH        ESSEX              MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             1 WSW WESTMINSTER       42.55N  71.91W
04/01/2017  M6.7 INCH        WORCESTER          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             1 NW COLLINSVILLE       41.83N  72.94W
04/01/2017  M1.0 INCH        HARTFORD           CT   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             1 N HAVERHILL           42.79N  71.09W
04/01/2017  M4.6 INCH        ESSEX              MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             SW MILLERS FALLS        42.58N  72.50W
04/01/2017  M2.0 INCH        FRANKLIN           MA   COCORAHS

            24 HOUR SNOWFALL.

0720 AM     SNOW             1 SE WINCHESTER         42.45N  71.14W
04/01/2017  M1.1 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0721 AM     SNOW             2 N NORTHBOROUGH        42.35N  71.64W
04/01/2017  M2.5 INCH        WORCESTER          MA   COCORAHS

            24 HOUR SNOWFALL.

0727 AM     SNOW             LEXINGTON               42.45N  71.22W
04/01/2017  M2.4 INCH        MIDDLESEX          MA   HAM RADIO

            HAM RADIO

0728 AM     SNOW             NORTH GRANBY            42.02N  72.82W
04/01/2017  M1.8 INCH        HARTFORD           CT   TRAINED SPOTTER

            TRAINED SPOTTER

0730 AM     SNOW             2 NW STOW               42.46N  71.53W
04/01/2017  M2.0 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0730 AM     SNOW             2 SSE NORTH ANDOVER     42.67N  71.11W
04/01/2017  M2.0 INCH        ESSEX              MA   COCORAHS

            24 HOUR SNOWFALL.

0747 AM     SNOW             SPENCER                 42.19N  72.01W
04/01/2017  M1.0 INCH        WORCESTER          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0753 AM     SNOW             GROTON                  42.67N  71.57W
04/01/2017  M4.3 INCH        MIDDLESEX          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0754 AM     SNOW             DRACUT                  42.67N  71.30W
04/01/2017  M3.0 INCH        MIDDLESEX          MA   HAM RADIO

            HAM RADIO

0806 AM     SNOW             ASHFIELD                42.49N  72.81W
04/01/2017  M6.0 INCH        FRANKLIN           MA   NONE

0810 AM     SNOW             METHUEN                 42.75N  71.17W
04/01/2017  M3.8 INCH        ESSEX              MA   GENERAL PUBLIC

            GENERAL PUBLIC

0817 AM     SNOW             AUBURN                  42.17N  71.87W
04/01/2017  M2.1 INCH        WORCESTER          MA   TRAINED SPOTTER

            TRAINED SPOTTER

&&

KAB
Local storm report, Apr 1, 7:27 AM EST, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MA
827 AM EDT SAT APR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0824 AM     SNOW             ASHBURNHAM              42.63N  71.90W
04/01/2017  M6.5 INCH        WORCESTER          MA   CO-OP OBSERVER

&&

KAB
Local storm report, Apr 1, 7:28 AM EST, 1 hour 2 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TAUNTON MA
828 AM EDT SAT APR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0555 AM     NON-TSTM WND DMG WAREHAM                 41.75N  70.72W
04/01/2017                   PLYMOUTH           MA   AMATEUR RADIO

            TREE DOWN BLOCKING ROBINWOOD ROAD

0614 AM     NON-TSTM WND DMG MILFORD                 42.15N  71.52W
04/01/2017                   WORCESTER          MA   AMATEUR RADIO

            TREE DOWN ON CAR

0617 AM     NON-TSTM WND DMG KINGSTON                42.00N  70.71W
04/01/2017                   PLYMOUTH           MA   AMATEUR RADIO

            LARGE TREE LIMB DOWN ON ROUTE 80.

0635 AM     NON-TSTM WND DMG HOPKINTON               42.22N  71.52W
04/01/2017                   MIDDLESEX          MA   AMATEUR RADIO

            TREE BRANCH AND WIRES DOWN ON ASH STREET NEAR FRONT
            STREET

0724 AM     NON-TSTM WND GST NANTUCKET               41.28N  70.10W
04/01/2017  M59 MPH          NANTUCKET          MA   HAM RADIO

            HAM RADIO

&&

KAB
Local storm report, Apr 1, 7:36 AM EST, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MA
836 AM EDT SAT APR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     SNOW             1 WSW BERLIN            42.38N  71.66W
04/01/2017  M2.8 INCH        WORCESTER          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             2 ESE PLAINFIELD        42.50N  72.88W
04/01/2017  M4.0 INCH        HAMPSHIRE          MA   COCORAHS

            24 HOUR SNOWFALL.

0700 AM     SNOW             2 NNW MILFORD           42.18N  71.53W
04/01/2017  M1.0 INCH        WORCESTER          MA   COCORAHS

            24 HOUR SNOWFALL.

0730 AM     SNOW             1 SE SUNDERLAND         42.45N  72.57W
04/01/2017  M1.0 INCH        FRANKLIN           MA   COCORAHS

            24 HOUR SNOWFALL.

0745 AM     SNOW             2 SE LEXINGTON          42.42N  71.20W
04/01/2017  M1.5 INCH        MIDDLESEX          MA   COCORAHS

            24 HOUR SNOWFALL.

0755 AM     SNOW             2 SW WESTHAMPTON        42.28N  72.79W
04/01/2017  M3.5 INCH        HAMPSHIRE          MA   COCORAHS

            24 HOUR SNOWFALL.

0800 AM     SNOW             3 SW AUBURN             42.17N  71.87W
04/01/2017  M2.1 INCH        WORCESTER          MA   COCORAHS

            24 HOUR SNOWFALL.

0800 AM     SNOW             2 ESE BUCKLAND          42.59N  72.75W
04/01/2017  M5.1 INCH        FRANKLIN           MA   COCORAHS

            24 HOUR SNOWFALL.

0800 AM     SNOW             3 WNW SPRINGFIELD       42.12N  72.59W
04/01/2017  M1.8 INCH        HAMPDEN            MA   COCORAHS

            24 HOUR SNOWFALL.

&&

KAB
Local storm report, Apr 1, 7:44 AM EST, 46 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TAUNTON MA
844 AM EDT SAT APR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0555 AM     NON-TSTM WND DMG WAREHAM                 41.75N  70.72W
04/01/2017                   PLYMOUTH           MA   AMATEUR RADIO

            TREE DOWN BLOCKING ROBINWOOD ROAD

0614 AM     NON-TSTM WND DMG MILFORD                 42.15N  71.52W
04/01/2017                   WORCESTER          MA   AMATEUR RADIO

            TREE DOWN ON CAR

0617 AM     NON-TSTM WND DMG KINGSTON                42.00N  70.71W
04/01/2017                   PLYMOUTH           MA   AMATEUR RADIO

            LARGE TREE LIMB DOWN ON ROUTE 80.

0635 AM     NON-TSTM WND DMG HOPKINTON               42.22N  71.52W
04/01/2017                   MIDDLESEX          MA   AMATEUR RADIO

            TREE BRANCH AND WIRES DOWN ON ASH STREET NEAR FRONT
            STREET

0724 AM     NON-TSTM WND GST NANTUCKET               41.28N  70.10W
04/01/2017  M59 MPH          NANTUCKET          MA   HAM RADIO

            HAM RADIO

&&

KAB
Local storm report, Apr 1, 8:24 AM EST, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TAUNTON MA
924 AM EDT SAT APR 01 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0700 AM     SNOW             1 NNE BARRE             42.44N  72.10W
04/01/2017  M3.5 INCH        WORCESTER          MA   COCORAHS

            24 HOUR SNOWFALL.

0800 AM     SNOW             1 SW CONWAY             42.51N  72.70W
04/01/2017  M3.0 INCH        FRANKLIN           MA   COCORAHS

            24 HOUR SNOWFALL.

0846 AM     SNOW             CHESTER                 42.26N  72.91W
04/01/2017  M3.0 INCH        HAMPDEN            MA   TRAINED SPOTTER

            TRAINED SPOTTER

0859 AM     SNOW             NORTH CHELMSFORD        42.64N  71.38W
04/01/2017  M4.0 INCH        MIDDLESEX          MA   HAM RADIO

            HAM RADIO

0903 AM     SNOW             SUDBURY                 42.38N  71.42W
04/01/2017  M2.5 INCH        MIDDLESEX          MA   HAM RADIO

            HAM RADIO

0905 AM     SNOW             LEXINGTON               42.45N  71.24W
04/01/2017  M1.6 INCH        MIDDLESEX          MA   TRAINED SPOTTER

            TRAINED SPOTTER

0908 AM     SNOW             LEOMINSTER              42.53N  71.76W
04/01/2017  M4.7 INCH        WORCESTER          MA   HAM RADIO

            HAM RADIO

0921 AM     SNOW             GARDNER                 42.58N  72.00W
04/01/2017  M5.5 INCH        WORCESTER          MA   HAM RADIO

            HAM RADIO

&&

KAB

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

3 flood, 2 high wind, 1 winter storm. Local standard time, as filed.

Winter Storm, Western Essex

When
April 1, 8:30 AM EST to 6:30 PM EST
Where
Western Essex forecast zone
Reported by
CoCoRaHS
Coordinates
42.639, -70.868 (the zone’s center; the record gives no point)

Trained spotters reported snowfall amounts ranging from 3 to 10 inches. A spotter in the Community Collaborative Rain, Hail, and Snow Network (CoCoRaHS) reported a snow total of 10.1 inches in Newburyport.

Flood, Norfolk

When
April 1, 9:00 AM EST to 6:00 PM EST
Where
Norfolk County, 0.46 mi N of West Quincy to 0.49 mi N of West Quincy
Cause
Heavy Rain
Property damage
$5,000
Reported by
Amateur Radio
Coordinates
42.237, -71.031

At 944 AM EST an amateur radio operator reported a flooded basement on Bunker Hill Lane in Quincy.

Flood, Bristol

When
April 1, 10:00 AM EST to 6:00 PM EST
Where
Bristol County, 0.97 mi WSW of Whittenton to 0.8 mi W of Whittenton
Cause
Heavy Rain
Property damage
$5,000
Reported by
Amateur Radio
Coordinates
41.917, -71.099

At 1105 AM EST, an amateur radio operator reported a flooded basement on Green Street in Taunton.

Flood, Plymouth

When
April 1, 11:00 AM EST to 6:00 PM EST
Where
Plymouth County, 0.03 mi SE of Scituate to 0.13 mi SSE of Scituate
Cause
Heavy Rain
Property damage
$5,000
Reported by
Amateur Radio
Coordinates
42.200, -70.730

At 1158 AM EST, an amateur radio operator reported a flooded basement on Porter Road in Scituate.

High Wind, Barnstable

When
April 1, 12:11 PM EST
Where
Barnstable forecast zone
Measured
54 kt (62 mph) measured gust
Reported by
Trained Spotter
Coordinates
41.684, -70.274 (the zone’s center; the record gives no point)

At 1211 PM EST, a trained spotter in East Falmouth measured a wind gust of 62 mph. At the same time, the spotter measured a sustained wind of 41 mph.

High Wind, Nantucket

When
April 1, 1:28 PM EST to 2:30 PM EST
Where
Nantucket forecast zone
Measured
56 kt (64 mph) measured gust
Reported by
Amateur Radio
Coordinates
41.270, -70.022 (the zone’s center; the record gives no point)

At 228 PM EST, an amateur radio operator on Nantucket measured a wind gust of 65 mph. The operator measured wind gusts of 58 to 65 mph between 128 PM and 229 PM EST.

What these are

Winter Storm
A storm that brought snow, sleet or freezing rain at warning levels, usually over several hours or days.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Massachusetts in 2017Every state in 2017This day in weather historyWarnings in Massachusetts, April 2017

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 694444, 694485, 694487, 694488, 694457, 694456.