Alert archive / Massachusetts / Flash Flood Watches in 2018

Flash Flood Watch 11, NWS Boston/Norton, MA

October 26, 20185 counties in Rhode Island; 6 counties in Massachusetts

NWS Boston/Norton, MA issued this flash flood watch at Oct 26, 2018, 2:30 PM EDT for 5 counties in Rhode Island; 6 counties in Massachusetts. It took effect at Oct 27, 2018, 8:00 AM EDT. It was in force for 10 hr.

The area

The counties it named.

The facts

Issued
Oct 26, 2018, 2:30 PM EDT (18:30 UTC)
In effect from
Oct 27, 2018, 8:00 AM EDT
Expired
Oct 27, 2018, 6:28 PM EDT
In force
10 hr
Issued by
NWS Boston/Norton, MA
Flood severity
None

Counties Barnstable County, MA, Bristol County, MA, Dukes County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI

The radar

The Boston radar (KBOX), 33 km from the middle of the area, began a volume at 18:34 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 6.5 hours before the alert went out and 88 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2018-10-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2018-10-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -50 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
972 m above ground
0-6 km bulk shear
58 kt
0-1 km storm-relative helicity
-50 m²/s²
0-3 km storm-relative helicity
68 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

111 
WGUS61 KBOX 261830
FFABOX

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Boston/Norton MA
230 PM EDT Fri Oct 26 2018

MAZ017>024-RIZ001>008-270230-
/O.NEW.KBOX.FF.A.0011.181027T1200Z-181028T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-
Newport RI-Block Island RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, Newport, and New Shoreham
230 PM EDT Fri Oct 26 2018

...FLASH FLOOD WATCH IN EFFECT FROM SATURDAY MORNING THROUGH
SATURDAY EVENING...

The National Weather Service in Boston/Norton has issued a

* Flash Flood Watch for portions of southeastern Massachusetts 
  and Rhode Island, including the following areas, in 
  southeastern Massachusetts, Barnstable, Bristol, Dukes, 
  Nantucket, and Plymouth. In Rhode Island, Block Island, 
  Bristol, Kent, Newport, Providence, and Washington. 

* From Saturday morning through Saturday evening

* A strong coastal storm will bring heavy rains to southeast New
  England Saturday. Rain amounts up to 2-3 inches are expected,
  however locally heavier amounts are likely. This could lead to
  urban and poor drainage flooding, which would potentially be 
  exacerbated by leaf clogged drains. 

* Heavy rains are expected to move into the region early Saturday
  morning and exit by Saturday evening. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
5 follow-up statements
964 
WGUS61 KBOX 270204
FFABOX

Flood Watch
National Weather Service Boston/Norton MA
1004 PM EDT Fri Oct 26 2018

MAZ017>024-RIZ001>008-271015-
/O.CON.KBOX.FF.A.0011.181027T1200Z-181028T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-
Newport RI-Block Island RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, Newport, and New Shoreham
1004 PM EDT Fri Oct 26 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT SATURDAY
THROUGH SATURDAY EVENING...

The Flash Flood Watch continues for

* Portions of southeastern Massachusetts and all of Rhode Island.

* From 8 AM EDT Saturday through Saturday evening

* A strong coastal storm will bring heavy rains to southeast New 
  England Saturday. Rain amounts up to 2-3 inches are expected, 
  however locally heavier amounts are likely. This could lead to 
  urban and poor drainage flooding, which would potentially be 
  exacerbated by leaf clogged drains. 

* Heavy rains are expected to move into the region early 
  Saturday morning and exit by Saturday evening. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
554 
WGUS61 KBOX 270713
FFABOX

Flood Watch
National Weather Service Boston/Norton MA
313 AM EDT Sat Oct 27 2018

MAZ017>024-RIZ001>008-271515-
/O.CON.KBOX.FF.A.0011.181027T1200Z-181028T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-
Newport RI-Block Island RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, Newport, and New Shoreham
313 AM EDT Sat Oct 27 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH THIS EVENING...

The Flash Flood Watch continues for

* Southeastern Massachusetts and all of Rhode Island. 

* From 8 AM EDT this morning through this evening

* A strong coastal storm will bring heavy rains to southeast New
  England later this morning and afternoon. Rain amounts up to 
  1-3 inches are expected, however locally heavier amounts are 
  likely. This could lead to urban and poor drainage flooding, 
  which would potentially be exacerbated by leaf clogged drains. 

* Rain will overspread this morning. Becoming heavier late this 
  morning and afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
584 
WGUS61 KBOX 271537
FFABOX

Flood Watch
National Weather Service Boston/Norton MA
1137 AM EDT Sat Oct 27 2018


MAZ017>024-RIZ001>008-272345-
/O.CON.KBOX.FF.A.0011.000000T0000Z-181028T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-
Newport RI-Block Island RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, Newport, and New Shoreham
1137 AM EDT Sat Oct 27 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

The Flash Flood Watch continues for

* Portions of southeastern Massachusetts and Rhode Island, 
  including the following areas, in southeastern Massachusetts, 
  Barnstable, Bristol, Dukes, Nantucket, and Plymouth. In Rhode 
  Island, Block Island, Bristol, Kent, Newport, Providence, and 
  Washington. 

* Until 8 PM EDT this evening

* A strong coastal storm will bring heavy rains to southeast New 
  England later this morning and afternoon. Rain amounts up to 
  1- 3 inches are expected, however locally heavier amounts are 
  likely. This could lead to urban and poor drainage flooding, 
  which would potentially be exacerbated by leaf clogged drains. 

* Rain will overspread this morning. Becoming heavier late this 
  morning and afternoon. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
403 
WGUS61 KBOX 271942
FFABOX

Flood Watch
National Weather Service Boston/Norton MA
342 PM EDT Sat Oct 27 2018


MAZ017>024-RIZ001>008-280000-
/O.CON.KBOX.FF.A.0011.000000T0000Z-181028T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-
Newport RI-Block Island RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, Newport, and New Shoreham
342 PM EDT Sat Oct 27 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

The Flash Flood Watch continues for

* Portions of southeastern Massachusetts and Rhode Island, 
  including the following areas, in southeastern Massachusetts, 
  Barnstable, Bristol, Dukes, Nantucket, and Plymouth. In Rhode 
  Island, Block Island, Bristol, Kent, Newport, Providence, and 
  Washington. 

* Until 8 PM EDT this evening

* A strong coastal storm will move across Southern New England
  tonight. Rain will taper off from south to north as the storm
  moves north. This could lead to urban and poor drainage 
  flooding, which would potentially be exacerbated by leaf clogged
  drains. 

* Rain will taper to drizzle in the evening. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Flash Flood Watch means that conditions may develop that lead
to flash flooding. Flash flooding is a very dangerous situation.

You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.

&&

$$
976 
WGUS61 KBOX 272228
FFABOX

Flood Watch
National Weather Service Boston/Norton MA
628 PM EDT Sat Oct 27 2018

MAZ017>024-RIZ001>008-272330-
/O.CAN.KBOX.FF.A.0011.000000T0000Z-181028T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Bristol MA-Western Plymouth MA-Eastern Plymouth MA-
Southern Bristol MA-Southern Plymouth MA-Barnstable MA-Dukes MA-
Nantucket MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-
Newport RI-Block Island RI-
Including the cities of Taunton, Brockton, Plymouth, Fall River, 
New Bedford, Mattapoisett, Chatham, Falmouth, Provincetown, 
Vineyard Haven, Nantucket, Foster, Smithfield, Providence, 
Coventry, West Greenwich, East Greenwich, Warwick, West Warwick, 
Bristol, Narragansett, Westerly, Newport, and New Shoreham
628 PM EDT Sat Oct 27 2018

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for portions of southeastern Massachusetts
and Rhode Island has been cancelled given the threat for flash flooding
has diminished. Showers of varying intensity will continue this 
evening however any flooding will be nuisance minor street and 
highway flooding.

$$

Nocera

What forecasters said that day

The local office's own words before this flash flood watch went out, 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 this flash flood watch went out at Oct 26, 1:37 PM EDT, 53 minutes earlier.

Area forecast discussion, Oct 26, 1:37 PM EDT, 53 minutes before
Area Forecast Discussion
National Weather Service Boston/Norton MA
137 PM EDT Fri Oct 26 2018

.SYNOPSIS...
Cooler than normal, but mainly dry conditions continue into
Friday. A significant coastal storm will impact the region
Saturday with heavy rainfall, strong coastal winds and minor
coastal flooding. Mainly dry and seasonable conditions return
Sunday, but another low pressure will likely bring more rain on
Monday. High pressure follows Tuesday with dry weather, then an
approaching frontal system brings an increasing risk of showers
next Thursday.

&&

.NEAR TERM /THROUGH TONIGHT/...
1030 AM Update...

Line of clouds is currently draped from Hampshire county to
Rhode Island. This will slowly edge northeast through the day
ahead of our impending coastal storm. High Wind Watches have
been expanded along all MA and RI coastlines during the day
Saturday as wind gusts are expected to exceed 50 kts.

Previous Discussion...

Mid/high clouds will be overspreading the
region today with sunshine gradually fading behind increasing
cloud cover, especially across SW New Eng. High temps will
remain colder than normal, likely topping out in the low 50s
across much of the region. Slow development of return flow
supports this thinking as the high pres slides to the SE.

This evening, precip shield associated with the Nor'easter
gradually builds from the SW. Soundings are initially very dry
in the lower lvls, so expect the rain to hold off until the
early AM hours across most of S New England. Cannot rule out
some mixed wintry precip in the NW high terrain as there is
indication of some localized cold air damming initially.

&&

.SHORT TERM /SATURDAY/...
** Strong Nor'easter to Impact The Region Saturday **
** Strong Winds and Coastal Flooding The Primary Impacts **

Overview...
Multi-faceted Nor'easter expected to impact the region
beginning early Sat morning and continuing into Sat evening.
Information regarding winds, rain and potential convection can
be found here, see below for more on the coastal flood threat.
Low pres will develop downwind of the Appalachians associated
with remnant convection late this afternoon and evening, then
gradually shift offshore. The parent low deepens as it shifts
offshore of the NJ coast early Sat, developing typical
warm/cold frontal setup as it begins to shift toward the S coast
of New England by afternoon. PWATs are roughly 2 std deviations
above normal thanks to lingering tropical moisture and final
locations of front/LLJ will ultimately define mesoscale impacts
where there remains some uncertainty, particularly with the
approach and potential passage of a warm front across SE
portions of the forecast area during the afternoon and evening
Sat.

Winds...
H92-H85 layer easterly LLJ crosses S-N from the S coast at 12Z,
shifting E with time, and dissipating off the E coast by
evening. Core of this LLJ is 50-60 kt as a mean between
guidance, but WRF/NAM suggest the possibility of 70 kt magnitude
just offshore. Lower lvl mixing will be limited except offshore
due to overnight cooling initially, which will limit the
ability for this momentum to fully reach the sfc. Some dry-
adiabatic lapse rates mainly along the outer extremities,
Cape/Islands and Cape Ann. Will hoist High Wind Watch for these
areas with this update, but its very likely at least wind
advisories may be needed during the mid AM to afternoon hours
especially along the S and E coastlines as this LLJ makes its
passage. Expecting downed trees given they remain fully
foliated.

Precipitation...
With moderately high PWATS and some banding possible as the
warm/cold front develop offshore, expect some periods of
moderate to heavy rainfall. This will be highest mainly across
SE MA and RI, closest to the approaching front. However, with E
flow, Worcester Hills and Berkshires are likely to see higher
rainfall amounts. Current rainfall amounts of 1-2 inches with a
few 2-4 inch amounts are possible, with these higher totals
focused across the SE and during the late morning and afternoon.
Will also need to monitor the risk for late day convection,
associated with the warm frontal passage (mainly across SE
MA/RI) as this is where highest rainfall rates could be
observed. Overall, typical urban and poor drainage flooding will
be the most likely impact from the rainfall, but it will
increase the wind threat due to ground softening.

Note, early AM temps will be very close, if not below freezing
at precip onset mainly in the higher terrain of
Franklin/Hampshire and N Worcester COs. A mix of SN/PL are
possible during the early morning hours with some very localized
icy conditions possible.

Convection...
At issue is the potential for a warm front to lift into the
Coastal Plain or at least across the SE Coast. With 00Z
guidance, the mean of placement is further E than previous runs,
however ranges stretch from just N of Nantucket, to near the
I95 corridor by 00Z Sun. This late timing is also coincident
with upper lvl dry slot moving in steepening mid lvl lapse rates
to 6.0-7.0C/km. Some indication of MU CAPE values 500+ and very
high helicity values given the LLJ. Therefore, this will need
to be watched as some stronger TS could develop within the dry
slot and/or along the warm front, enhancing both rainfall rates,
risk for strong winds and even a very low risk for an isolated
tornado if all dynamic/thermodynamic features can coincide.

&&

.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
Highlights...

* Mainly dry and seasonable Sunday, a few showers possible north
* Another period of rain likely Monday
* Dry weather Tue/Wed then risk of showers increases Thu

Saturday night...

Exact location of warm front remains uncertain but expecting the
boundary to be somewhere near the Cape Cod Canal Sat evening. Will
have to watch convective threat early in the evening across SE New
Eng where there will be some instability and strong low level shear.
Otherwise, despite mid level dry slot across SNE, abundant low level
moisture and shortwave energy lifting north into the region will
result in areas of light rain and drizzle. Positions of the low
level jet will bring strong E/NE winds in the evening across coastal
Essex county and Cape Ann with potential gusts to 40-50 mph.

Sunday...

Dry slot remains across the region with drying in the lower levels
occurring as low pres lifts to the north with SW flow
developing. Mainly dry conditions expected with even some
sunshine in the coastal plain, but a few showers still possible
in western New Eng closest to deeper moisture and another
shortwave passage to the west. Seasonable temps.

Sunday night into Monday...

The last in a series of shortwaves rotating around mid level trough
expected to move into New Eng late Sun night into Mon, with low pres
from the west tracking near or south of New Eng. This will likely
bring another period of rain Monday, but rainfall amounts mainly
less than 0.5 inch.

Tuesday into Thursday...

Pattern change expected as subtropical ridge returns across SE CONUS
with rising heights and SW flow developing aloft. Dry weather
expected Tue with high pres moving into the region with milder temps
Wed ahead of a cold front. There are timing and amplitude
differences with next amplifying trough to the west which impacts
timing and strength of next frontal system approaching Wed/Thu.
Based on ensemble guidance, maintained dry weather Wed with
increasing risk of showers Thu as system approaches.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
Forecaster Confidence Levels...

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

Short Term /through Saturday Night/...High confidence.

Through 06Z tonight...
VFR conditions contine with light winds turning south by 23Z
then to the E-SE. Clouds increasing from west to east this
evening with CIGS remaining VFR.

06Z to 12Z Sat...
Transitional period. Cloudcover increases and VFR becomes MVFR
as SHRA move in from the southwest. East winds start to
increase and become gusty over coastal sites, gusting 20-30 kts.

Sat...
IFR/MVFR in RA continues through the evening with low CIGS and
VSBYS. Strong E winds gust to 20-30 kt in the interior with 35-50
possible across E and SE Coast, strongest Cape/Islands. LLWS is
likely given 50-60 kt at 2kft.

Saturday Night...
Mainly IFR, with local MVFR possible. Strong winds with local
gusts to 40 kt. Chance RA and patchy FG.

KBOS Terminal...High confidence in TAF.

KBDL Terminal...High confidence in TAF.

Outlook /Sunday through Tuesday/...

Sunday: Mainly VFR, with local IFR possible. Breezy. Slight
chance SHRA.

Sunday Night: Mainly VFR, with areas MVFR possible. Breezy.
Chance RA.

Monday: Mainly MVFR, with areas VFR possible. Breezy. Chance
RA, slight chance SHRA.

Monday Night: Mainly VFR, with local MVFR possible. Breezy.
Slight chance SHRA.

Tuesday: VFR. Breezy.

&&

.MARINE...
Forecaster Confidence Levels...

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

Short Term /through Saturday/...High confidence.

Winds and seas continue to diminish this morning, remaining
mainly below small craft thresholds through this evening.

The approach of a Nor'easter for Saturday will lead to strong
easterly winds beginning early Saturday morning and continuing
into Saturday evening. Some Storm wind gusts can be expected
except across the most sheltered bays (Boston Harbor,
Narragansett Bay) where Gales are expected. These will continue,
along with dangerous seas offshore (15-18 ft along the E coast
Saturday afternoon/evening). Storm/Gale Warnings will be issued.
Only caveat is Buzzards Bay due to uncertainty, which will
remain a storm watch with this cycle.

Rain, or even an occasional thunderstorm also possible Saturday.

Outlook /Saturday Night through Tuesday/...

Saturday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Rough seas up to 18 ft. Chance of rain,
patchy fog. Areas of visibility 1 nm or less.

Sunday: Moderate risk for Small Craft Advisory winds with gusts
up to 25 kt. Rough seas up to 11 ft.

Sunday Night: Winds less than 25 kt. Rough seas up to 9 ft.
Chance of rain.

Monday: Winds less than 25 kt. Areas of rough seas. Rain
likely, chance of rain showers.

Monday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. Slight chance of rain
showers.

Tuesday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Seas up to 5 ft. Slight chance of rain showers.

&&

.TIDES/COASTAL FLOODING...
Saturday afternoon's high tide will coincide with the strong
winds and rough seas from an early season Nor'easter. The
astronomical tide at Boston is 11.1 feet MLLW. Timing of low
level jet will likely be close to the time of high tide with
seas ramping up quickly through the morning and into the early
afternoon. A storm surge up to 1-2 ft is likely, combined with
10-15 ft seas is expected to produce areas of minor coastal
flooding along the east coast, with areas from coastal Plymouth
county to the north shore most vulnerable. A few pockets of
minor coastal flooding is also possible along the south coast of
RI/MA but this will be very isolated.

Not expecting much if any coastal flooding risk for the late
Saturday night high tide due to a lower astronomical tide and less
surge and much less wind.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...High Wind Watch from Saturday morning through Saturday
     afternoon for MAZ020>024.
     High Wind Watch from Saturday morning through Saturday evening
     for MAZ019.
     High Wind Watch from Saturday morning through Saturday evening
     for MAZ007-015-016.
RI...High Wind Watch from Saturday morning through Saturday
     afternoon for RIZ006>008.
MARINE...Storm Warning from 6 AM to 2 PM EDT Saturday for ANZ232-233-
     235-237-255-256.
     Gale Warning from 10 AM to 8 PM EDT Saturday for ANZ230.
     Storm Warning from 10 AM to 5 PM EDT Saturday for ANZ231-251.
     Gale Warning from 6 AM to 5 PM EDT Saturday for ANZ236.
     Storm Watch from late tonight through Saturday afternoon for
     ANZ234.
     Storm Warning from 8 AM to 5 PM EDT Saturday for ANZ250-254.

&&

SYNOPSIS...KJC/Doody
NEAR TERM...KJC/BW
SHORT TERM...Doody
LONG TERM...KJC
AVIATION...KJC/BW
MARINE...KJC/Doody
TIDES/COASTAL FLOODING...
Hazardous weather outlook, Oct 26, 3:34 AM EDT, 10 hours 56 minutes before
Hazardous Weather Outlook
National Weather Service Boston/Norton MA
334 AM EDT Fri Oct 26 2018

CTZ002>004-MAZ002>006-008>021-026-RIZ001>007-270745-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-
Western Essex MA-Western Hampshire MA-Western Hampden MA-
Eastern Hampshire MA-Eastern Hampden MA-Southern Worcester MA-
Western Norfolk MA-Southeast Middlesex MA-Suffolk MA-
Eastern Norfolk MA-Northern Bristol MA-Western Plymouth MA-
Eastern Plymouth MA-Southern Bristol MA-Southern Plymouth MA-
Northern Middlesex MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI-
Washington RI-Newport RI-
334 AM EDT Fri Oct 26 2018

This Hazardous Weather Outlook is for northern Connecticut, central
Massachusetts, eastern Massachusetts, northeastern Massachusetts,
southeastern Massachusetts, western Massachusetts, northern Rhode
Island and southern Rhode Island.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

A significant coastal storm will bring heavy rainfall and strong
winds along the coast on Saturday. In addition, minor coastal
flooding is likely along portions of the east coast of Massachusetts
during the Saturday afternoon high tide cycle.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ007-270745-
Eastern Essex MA-
334 AM EDT Fri Oct 26 2018

...HIGH WIND WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY
EVENING...

This Hazardous Weather Outlook is for northeastern Massachusetts.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   High Wind Watch.

A significant coastal storm will bring heavy rainfall and strong
winds along the coast on Saturday. In addition, minor coastal
flooding is likely along portions of the east coast of Massachusetts
during the Saturday afternoon high tide cycle.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ022>024-RIZ008-270745-
Barnstable MA-Dukes MA-Nantucket MA-Block Island RI-
334 AM EDT Fri Oct 26 2018

...HIGH WIND WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY
AFTERNOON...

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

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   High Wind Watch.

A significant coastal storm will bring heavy rainfall and strong
winds along the coast on Saturday. In addition, minor coastal
flooding is likely along portions of the east coast of Massachusetts
during the Saturday afternoon high tide cycle.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ232-233-235-237-255-256-270745-
Nantucket Sound-Vineyard Sound-Rhode Island Sound-Block Island Sound-
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-
334 AM EDT Fri Oct 26 2018

...STORM WARNING IN EFFECT FROM 6 AM TO 2 PM EDT SATURDAY...

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

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ250-254-270745-
Coastal waters east of Ipswich Bay and the Stellwagen Bank National
Marine Sanctuary-
Coastal waters from Provincetown MA to Chatham MA to Nantucket MA
out 20 nm-
334 AM EDT Fri Oct 26 2018

...STORM WARNING IN EFFECT FROM 8 AM TO 5 PM EDT SATURDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ231-251-270745-
Cape Cod Bay-Massachusetts Bay and Ipswich Bay-
334 AM EDT Fri Oct 26 2018

...STORM WARNING IN EFFECT FROM 10 AM TO 5 PM EDT SATURDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ236-270745-
Narragansett Bay-
334 AM EDT Fri Oct 26 2018

...GALE WARNING IN EFFECT FROM 6 AM TO 5 PM EDT SATURDAY...

This Hazardous Weather Outlook is for Rhode Island coastal waters.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Gale Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ234-270745-
Buzzards Bay-
334 AM EDT Fri Oct 26 2018

...STORM WATCH IN EFFECT FROM LATE TONIGHT THROUGH SATURDAY
AFTERNOON...

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.

   Storm Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Storm Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230-270745-
Boston Harbor-
334 AM EDT Fri Oct 26 2018

...GALE WARNING IN EFFECT FROM 10 AM TO 8 PM EDT SATURDAY...

This Hazardous Weather Outlook is for Massachusetts coastal waters.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

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

   Gale Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

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

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 26, 3:33 AM EDTHigh Wind WatchBOXNewport, Washington12 hr
Oct 26, 3:28 PM EDTHigh Wind WarningBOXNewport, Washington31 hr
Oct 26, 3:28 PM EDTWind AdvisoryBOXBristol, Kent, Newport, Providence, Washington31 hr
Oct 26, 3:31 AM EDTGale WarningBOX45 hr
Oct 26, 3:31 AM EDTStorm WarningBOX42 hr
Oct 26, 3:23 PM EDTCoastal Flood AdvisoryBOXBarnstable, Essex, Nantucket, Norfolk, Plymouth, Suffolk26 hr

Nearby

Flash Flood Watches in Massachusetts, 2018Flash Flood Watches in Rhode Island, 2018Every flash flood watch in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.