Connecticut, 2018

Flood and Strong Wind in Connecticut, December 21, 2018

December 21, 2018 · NWS BOX · 2 events in 1 county or zone

A storm passing west of Connecticut brought strong south winds to northern Connecticut on Friday December 21. The same storm also brought one to four inches of rain.

Where it happened

Every event with a place to put it; 1 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
$2,000
Crop damage
None recorded
Events
2

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.

A storm passing west of Connecticut brought strong south winds to northern Connecticut on Friday December 21. The same storm also brought one to four inches of rain.

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 Dec 21, 9:35 AM EST, 2 hours 25 minutes earlier.

Area forecast discussion, Dec 21, 9:35 AM EST, 2 hours 25 minutes before
Area Forecast Discussion
National Weather Service Boston/Norton MA
935 AM EST Fri Dec 21 2018

.SYNOPSIS...
A strong low pressure passing west of the region will bring heavy
rainfall and strong coastal winds into tonight. Low pressure
departs on Saturday followed by mainly dry and seasonably cold
conditions Sunday through Thursday. Another low pressure system
may bring rain late next week along with milder temperatures.

&&

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

930 AM Update...

As of 930 this morning, 2 low pressure centers were located to our
W/SW, with one in the eastern Great Lakes Region, and a second one
centered over western NC. Warm front was lifting thru SNE, and as of
mid morning was in the vicinity of the MA Pike, extending W to E,
had pushed thru BOS and was crossing ORH. Temps on the south side of
the front were in the mid 50s to low 60s. Have nudged up forecast
highs by a couple of degrees, with mainly low 60s in the southern
2/3 of our area, and 55 to 60 across northern MA and the
Cape/Islands. It's possible that we could see some mid 60s this
afternoon at a few locales. It's remarkable that in CT, SNC and
IJD both have dew points in the low 60s!

Periods of rain, moderate to heavy at times, continue thru
today. Flood Watch continues thru this evening across the area.
Based on radar trends and obs thus far, we still look to be on
track for an event total widespread 2-3 inches rainfall, with as
much as 4 inches in some locales.

High Wind Warning continues for the Cape/Islands, coastal Essex
County MA, and south coastal MA/RI. Wind Advisory continues for
northeast CT into central and eastern MA as well as northern RI. So
far we have received reports of a gust to 50 mph at Blue Hill, and a
gust to 55 mph at Warwick RI.

Early morning discussion...

Overview...
With the 00Z guidance updates, the synoptic scale features
remain in play as advertised. Deep trof will gradually take on a
negative tilt as strong vortices rotate S-N. The first round of
-RA having already moved thorugh overnight, associated with
advanced isentropic lift will now give way to baroclinically
forced precip as low-mid lvl warm front slide through between
the time of this writing and 12Z this morning. Following this
the first in a series of reinforcing LLJ will approach the S
coast, with strong convergence allowing for stronger forcing
across CT and W MA through the morning hours. PWAT plumes are
still extreme, nearing CHH/OKX record values for the date and
model prog maximums, so there will be no loss of moisture. The
deep warmth suggest efficient warm cloud processes, which along
with the high humidity and forcing from the LLJ will yield very
high rainfall rates throughout the day, potentially reaching or
exceeding 1.00 in/hr at times. Persistent 50-60 kt H92 LLJ will
be reinforced this evening across the SE, with a boost to 70+
kt. Below is a reiteration of the main impacts:

Rainfall...
The first round associated with the warm front will yield
periods of mod-heavy rain through about mid morning. Then as the
LLJ initially sets up across the coast, this will shift to a
more linear band along the main theta-e and PWAT axis setup
across CT and W/central MA. The combination of the low-mid
convergence as well as enhanced upslope will lead to heavy
rainfall rates. However, one concern is, as the overall mid lvl
trof axis tilts, it will hold this plume/precip shield in place
into the afternoon hours. Recent meso-scale models support this
thinking suggesting that the final highest QPF amounts may fall
across CT and W MA, and will update forecast to reflect this
thinking. Some HREF ensemble members show as much as 3-5 inches
in these areas, so will need to monitor for stream/river
flooding as well as localized urban flooding in the lower
portions of the CT valley. Further E, as the reinforced LLJ
begins to shift E later today, the axis of rain will begin to
shift E and remain at least somewhat progressive. However, all
the players remain for periods of heavy rainfall as it becomes
transitory, so will need to monitor for periods of heavy rain
with poor drainage or urban flooding and even some river
flooding as well, although QPF values will be more between
1.00-3.00in given the somewhat progressive nature. Will need to
monitor for convective elements as MU CAPE values could exceed
100j/kg, which could enhance these rainfall rates. Overall,
given the river/urban flood risk continues, will maintain the
current Flood Watch.

Strong winds...
With the first H92 LLJ impulse moving from the S coast and over
SE New England at least some of the 55-65 kt momentum will be
mixed to the sfc, especially where some of the lower lvl
inversion is eroded or overcome via precip drag. This will yield
at least wind advisory criteria gusts/damage (40+ mph) through
the daylight hours where current advisories reside. However,
latest trends push the axis a bit further W, so will be expand
the wind advisory include NE CT/NW RI and much of central MA
where the axis of higher terrain rests.

The second impulse crosses this same region between 21Z and 03Z
this evening, with a core exceeding 70kt. With convection a
possibility, and some CAMs suggesting a fine line development,
the strongest gusts across SE MA or even RI will more than
likely occur during this secondary impulse. In any case, gusts
50-60 kt are possible, with a low risk for higher should this
convective line develop and cross land from the open waters.
Given the prolonged stress from winds during the day, combined
with soaked soils, this may exacerbate the risk for tree damage.
Will be expanding the high wind warning to include Cape Ann due
to its exposure and proximity to the core of the jet.

Convective impacts...
Unexpectedly, given the model maximum LLJ, 0-3 km helicity
values are very high, on the order of 400+. However, soundings
continue to suggest little in the way of sfc based CAPE given
the moderate inversion. In fact, peak helicity and sfc
instability do not overplap, the former across New England and
the later upstream across PA/NJ. Still, with a pulse of higher
mid lvl lapse rates and MU CAPE values exceeding 100j/kg late
this afternoon and evening, if any stronger convection occurs
there is the low risk for a spin-up. This is most likely over
the waters, suggesting a waterspout risk but the risk is non-
zero over SE MA as well. In fact, have noticed some gate-to-gate
shear couplets offshore of the Carolina's and VA overnight.

However, it should be noted that the development of an
efficient fine line may be the dominant threat here given recent
CAMs suggesting of this possibility. This could more
efficiently bring down the anomalous LLJ.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM SATURDAY/...
Short term discussion is covered by the near term discussion.

&&

.LONG TERM /SATURDAY THROUGH THURSDAY/...
Big Picture...

Upper trough associated with today's storm will move northeast
of Southern New England. The upper flow then becomes zonal, with
at least two shortwaves moving through the flow. Model
consensus would bring them through New England Monday and
Wednesday. But shortwaves forecast in a zonal flow carry some
uncertainty as to how fast they actually move. A third
shortwave, coming off the Pacific and into the Southwest USA,
may eject through the Plains Thursday.

Upper contour fields diminishes below normal over the weekend,
recovers to normal Sunday, then cools again Monday.  A broad upper
ridge trends rising heights through midweek.

Mass and thermal fields on the various long-range models show
agreement on the big picture much of the period. For example,
they agree on the building upper ridge next week. But there remain
differences in details in positioning of the various shortwaves
next week.

Concerns...

Saturday...

Cold front moves through by Saturday midday. This passage may
generate one more batch of showers, followed by a wind shift
from the west and bring in colder drier air. Mixing in the cold
advection behind the front should reach 900 mb or a little
above. Winds in the mixed layer will be 30-35 kt. Temperatures
in the mixed layer will support mid 50s in the east, mid 40s in
the western hills.

Sunday through Wednesday...

Dry weather with seasonably cool temperatures. Shortwave on Monday
suggests a chance of rain/snow showers, although moisture and
lift are rather limited and suggest slight chance pops at best.
RH cross sections do support a period of sky cover Monday.
Partly to mostly clear Tuesday, then another batch of clouds for
Wednesday.

Thursday...

GFS shows ejecting shortwave reaching the Midwest and drawing
southerly flow and overrunning Thursday night. ECMWF shows high
pressure dominating through the day, with fair skies and light
winds. All suggest dry weather during the day. The GFS is
fastest with onset, while the GGEM and ECMWF suggest onset
toward Friday morning. Low confidence in timing of the rain, but
we trended toward the slower timing.

&&

.AVIATION /15Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels...

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

Short Term /through Tonight/...High confidence.

Today... IFR even occasional LIFR conditions in periods of
heavy rain. Strong E-SE winds gusting 30-40 kt inland, 40-50 kt
across E MA and RI, and 50-60 kt across SE MA (strongest this
evening). LLWS, 40-50 kt through the day, then 50-65 kt
especially across the E this evening. Low risk for TS,
especially across the SE this evening.

Overnight tonight...
Gradual improvement, winds slacken and rains taper after 03Z
this evening although lingering lighter rain is likely until the
early AM hours. IFR/MVFR conditions continue after a brief lift
to VFR following the heaviest rain. S winds around 10 kt with
gusts around 25 kt through 12Z.

KBOS Terminal...High confidence in TAF trends, timing may be off
a bit.

KBDL Terminal...High confidence in TAF trends, timing may be off
a bit.

Outlook /Saturday through Tuesday/...

Saturday: Mainly VFR, with local IFR possible early. Windy with
gusts to 35 kt. Slight chance SHRA.

Saturday Night: VFR. Windy with gusts to 30 kt.

Sunday: VFR. Breezy.

Sunday Night: VFR. Slight chance SHSN.

Monday: VFR. Breezy. Slight chance SHSN.

Monday Night through Christmas Day: VFR. Breezy.

&&

.MARINE...
Forecaster Confidence Levels...

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

Short Term /through Tonight/...High confidence.

Winds will begin to increase through the morning hours reaching
reaching gale force later this morning and storm force this
afternoon. These winds will then linger into the overnight
hours. Heavy rain/fog will accompany these winds with resulting
visibility below 3 nm.

All rain/winds dissipate this evening, although high seas will
take some time to diminish. Gale conditions linger into Saturday
for some areas, while others can be converted into Small Craft
Advisories.

Outlook /Saturday through Tuesday/...

Saturday: Moderate risk for gale force winds with gusts up to
35 kt. Rough seas up to 17 ft. Slight chance of rain showers.

Saturday Night: Low risk for gale force winds with gusts up to
35 kt. Rough seas up to 16 ft.

Sunday: Low risk for Small Craft Advisory winds with gusts up
to 25 kt. Areas of rough seas.

Sunday Night: Winds less than 25 kt. Areas of seas approaching
5 ft. Slight chance of rain showers.

Monday: Winds less than 25 kt. Areas of seas approaching 5 ft.

Monday Night: Winds less than 25 kt. Local rough seas.

Christmas Day: Winds less than 25 kt. Seas locally approaching
5 ft.

&&

.TIDES/COASTAL FLOODING...
* Coastal Flood Advisory for South Coast This Evening *

Early AM surge values from Sandy Hook, NJ to Montauk Pt
including CT along LI sound is generally running about 0.6-0.9,
highest close to the developing LLJ to the S. This is about
130-140 percent of current ESTOFs values. However, these values
are also low enough such that the early AM S coastal tide should
pass with little impact in spite it being high astronomically.

However, the combination of persistent S-SE fetch and a couple
strong LLJ impulses surge values could reach 1.5-2.0 ft along
the S coast, along with 12-15 seas offshore. This will continue
to risk for some minor coastal flooding mainly across S coastal
locations with this evening's high tide. Current Advisory covers
those areas at risk.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Flood Watch through late tonight for CTZ002>004.
     Wind Advisory until 10 PM EST this evening for CTZ004.
MA...High Wind Warning until 10 PM EST this evening for MAZ007-
     019>024.
     Flood Watch through late tonight for MAZ002>024-026.
     Wind Advisory until 10 PM EST this evening for MAZ005-006-
     012>018.
     Coastal Flood Advisory from 4 PM this afternoon to 9 PM EST
     this evening for MAZ020>022.
RI...High Wind Warning until 10 PM EST this evening for RIZ006>008.
     Flood Watch through late tonight for RIZ001>008.
     Wind Advisory until 10 PM EST this evening for RIZ001>005.
     Coastal Flood Advisory from 4 PM this afternoon to 9 PM EST
     this evening for RIZ004>007.
MARINE...Storm Warning until 9 PM EST this evening for ANZ231-232-256.
     Gale Warning until 1 AM EST Saturday for ANZ233>235-237-251.
     Gale Warning until 10 PM EST this evening for ANZ230-236.
     Storm Warning until 1 AM EST Saturday for ANZ250-254-255.

&&

SYNOPSIS...WTB/Doody
NEAR TERM...WTB/Doody/NMB
SHORT TERM...Doody
LONG TERM...WTB
AVIATION...WTB/Doody
MARINE...WTB/Doody
TIDES/COASTAL FLOODING...Staff
Hazardous weather outlook, Dec 21, 4:03 AM EST, 7 hours 57 minutes before
Hazardous Weather Outlook
National Weather Service Boston/Norton MA
403 AM EST Fri Dec 21 2018

CTZ002-003-MAZ002>004-008>011-026-220915-
Hartford CT-Tolland CT-Western Franklin MA-Eastern Franklin MA-
Northern Worcester MA-Western Hampshire MA-Western Hampden MA-
Eastern Hampshire MA-Eastern Hampden MA-Northern Middlesex MA-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...

This Hazardous Weather Outlook is for northern Connecticut, central
Massachusetts, eastern 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.

   Flood Watch.

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

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.

CTZ004-MAZ005-006-012>018-RIZ001>003-220915-
Windham CT-Central Middlesex MA-Western Essex MA-
Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-Northern Bristol MA-
Western Plymouth MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...WIND ADVISORY IN EFFECT UNTIL 10 PM EST THIS EVENING...

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

   Flood Watch.
   Wind Advisory.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ007-019-220915-
Eastern Essex MA-Eastern Plymouth MA-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...HIGH WIND WARNING IN EFFECT FROM 7 AM THIS MORNING TO 10 PM EST
THIS EVENING...

This Hazardous Weather Outlook is for northeastern Massachusetts
and 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.

   Flood Watch.
   High Wind Warning.

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

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.

MAZ020-021-RIZ006-007-220915-
Southern Bristol MA-Southern Plymouth MA-Washington RI-Newport RI-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...HIGH WIND WARNING IN EFFECT FROM 7 AM THIS MORNING TO 10 PM EST
THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 9 PM
EST THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts
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.

   Flood Watch.
   High Wind Warning.
   Coastal Flood Advisory.

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

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.

MAZ022-220915-
Barnstable MA-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...HIGH WIND WARNING IN EFFECT FROM 7 AM THIS MORNING TO 10 PM EST
THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 9 PM
EST 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.

   Flood Watch.
   High Wind Warning.
   Coastal Flood Advisory.

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

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.

RIZ004-005-220915-
Eastern Kent RI-Bristol RI-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...WIND ADVISORY IN EFFECT UNTIL 10 PM EST THIS EVENING...
...COASTAL FLOOD ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 9 PM
EST THIS EVENING...

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.

   Flood Watch.
   Wind Advisory.
   Coastal Flood Advisory.

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

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.

MAZ023-024-RIZ008-220915-
Dukes MA-Nantucket MA-Block Island RI-
403 AM EST Fri Dec 21 2018

...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT...
...HIGH WIND WARNING IN EFFECT FROM 7 AM THIS MORNING TO 10 PM EST
THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts
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.

   Flood Watch.
   High Wind Warning.

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

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.

ANZ236-220915-
Narragansett Bay-
403 AM EST Fri Dec 21 2018

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

This Hazardous Weather Outlook is for 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...Saturday through Thursday.

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.

ANZ231-232-256-220915-
Cape Cod Bay-Nantucket Sound-
Coastal Waters from Montauk NY to Marthas Vineyard extending out to
20 nm South of Block Island-
403 AM EST Fri Dec 21 2018

...STORM WARNING IN EFFECT FROM 9 AM THIS MORNING TO 9 PM EST 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...Saturday through Thursday.

Winds shift from the west Saturday and may reach gale force.

.SPOTTER INFORMATION STATEMENT...

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

ANZ250-254-255-220915-
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-
Coastal Waters extending out to 25 nm South of Marthas Vineyard and
Nantucket-
403 AM EST Fri Dec 21 2018

...STORM WARNING IN EFFECT FROM 9 AM THIS MORNING TO 1 AM EST
SATURDAY...

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 Warning.

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

Winds shift from the west Saturday and may reach gale force.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ233>235-237-251-220915-
Vineyard Sound-Buzzards Bay-Rhode Island Sound-Block Island Sound-
Massachusetts Bay and Ipswich Bay-
403 AM EST Fri Dec 21 2018

...GALE WARNING IN EFFECT UNTIL 1 AM EST SATURDAY...

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...Saturday through Thursday.

Winds shift from the west Saturday and may reach gale force.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230-220915-
Boston Harbor-
403 AM EST Fri Dec 21 2018

...GALE WARNING IN EFFECT UNTIL 10 PM EST THIS EVENING...

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...Saturday through Thursday.

No hazardous weather is expected at this time.

.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

In the hours before

Local storm report, Dec 21, 9:37 AM EST, 2 hours 23 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
937 AM EST FRI DEC 21 2018

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

0642 AM     HIGH SUST WINDS  CONIMICUT LIGHT         41.72N  71.34W
12/21/2018  M43 MPH          ANZ236             RI   MARINE MESONET

0730 AM     NON-TSTM WND DMG WAREHAM                 41.75N  70.72W
12/21/2018                   PLYMOUTH           MA   AMATEUR RADIO

            PHONE AND CABLE WIRES DOWN ON HOLLY STREET.

0818 AM     NON-TSTM WND DMG COVENTRY                41.68N  71.65W
12/21/2018                   KENT               RI   AMATEUR RADIO

            POWER LINES DOWN NEAR A NURSING HOME ON ROUTE 14.

0839 AM     NON-TSTM WND DMG WESTWOOD                42.22N  71.22W
12/21/2018                   NORFOLK            MA   AMATEUR RADIO

            WIRES DOWN AT THE INTERSECTION OF GLENN AND EDGEWOOD
            ROAD

0852 AM     NON-TSTM WND DMG SWANSEA                 41.75N  71.18W
12/21/2018                   BRISTOL            MA   AMATEUR RADIO

            WIRES DOWN ON ROUTE 6 BY CUMBERLAND FARMS.

&&

EVENT NUMBER BOX1805687
EVENT NUMBER BOX1805688
EVENT NUMBER BOX1805689
EVENT NUMBER BOX1805690
EVENT NUMBER BOX1805691

KAB
Local storm report, Dec 21, 10:57 AM EST, 1 hour 3 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1057 AM EST FRI DEC 21 2018

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

0847 AM     NON-TSTM WND GST BELLINGHAM              42.09N  71.47W
12/21/2018  M58 MPH          NORFOLK            MA   HAM RADIO

0903 AM     NON-TSTM WND DMG UPTON                   42.17N  71.61W
12/21/2018                   WORCESTER          MA   AMATEUR RADIO

            LARGE BRANCH DOWN ON RIVER STREET.

0920 AM     NON-TSTM WND DMG BERKLEY                 41.85N  71.08W
12/21/2018                   BRISTOL            MA   AMATEUR RADIO

            TREE AND WIRES DOWN ON PADELFORD STREET.

0924 AM     NON-TSTM WND DMG LAKEVILLE               41.85N  70.95W
12/21/2018                   PLYMOUTH           MA   AMATEUR RADIO

            LARGE TREE DOWN ON STONEHEDGE DRIVE

0946 AM     NON-TSTM WND GST MILTON                  42.25N  71.07W
12/21/2018  M62 MPH          NORFOLK            MA   HAM RADIO

0956 AM     NON-TSTM WND GST MILTON                  42.25N  71.07W
12/21/2018  M63 MPH          NORFOLK            MA   HAM RADIO

1036 AM     NON-TSTM WND GST MILTON                  42.25N  71.07W
12/21/2018  M64 MPH          NORFOLK            MA   HAM RADIO

&&

EVENT NUMBER BOX1805692
EVENT NUMBER BOX1805693
EVENT NUMBER BOX1805694
EVENT NUMBER BOX1805695
EVENT NUMBER BOX1805696
EVENT NUMBER BOX1805697
EVENT NUMBER BOX1805698

KAB
Local storm report, Dec 21, 11:28 AM EST, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1128 AM EST FRI DEC 21 2018

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

0940 AM     NON-TSTM WND DMG PLAINVILLE              41.68N  70.96W
12/21/2018                   BRISTOL            MA   AMATEUR RADIO

            TREE DOWN ON GROVE STREET.

0943 AM     NON-TSTM WND DMG BROOKLINE               42.32N  71.14W
12/21/2018                   NORFOLK            MA   AMATEUR RADIO

            LARGE TREE DOWN BLOCKING SIDEWALK AND ONE LANE OF ROAD
            ON BEACON STREET AT TAPPAN STRETT.

1000 AM     NON-TSTM WND DMG MOOSUP                  41.71N  71.88W
12/21/2018                   WINDHAM            CT   AMATEUR RADIO

            4 TO 6 INCH DIAMETER TREE BRANCH DOWN ON SNAKE MEADOW
            ROAD.

1004 AM     NON-TSTM WND DMG BROOKLINE               42.32N  71.14W
12/21/2018                   NORFOLK            MA   AMATEUR RADIO

            WIRES DOWN ON GIBBS AT BEALS STREET.

1015 AM     NON-TSTM WND DMG WRENTHAM                42.07N  71.33W
12/21/2018                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN ON WIRES ON MADISON STREET.

1016 AM     NON-TSTM WND DMG LAKEVILLE               41.85N  70.95W
12/21/2018                   PLYMOUTH           MA   AMATEUR RADIO

            LARGE TREE AND WIRES DOWN ON HEMLOCK SHORES ROAD

1019 AM     NON-TSTM WND DMG DUXBURY                 42.04N  70.67W
12/21/2018                   PLYMOUTH           MA   AMATEUR RADIO

            TREE AND WIRES DOWN ON TREMONT STREET.

1027 AM     NON-TSTM WND DMG HARVARD                 42.50N  71.58W
12/21/2018                   WORCESTER          MA   AMATEUR RADIO

            TREE DOWN BLOCKING ROAD ON WARREN AVENUE.

1030 AM     NON-TSTM WND DMG WEST BROOKFIELD         42.24N  72.15W
12/21/2018                   WORCESTER          MA   AMATEUR RADIO

            LARGE TREE DOWN ON WIRES ON HADLEY PATH

1034 AM     NON-TSTM WND DMG HUDSON                  42.39N  71.56W
12/21/2018                   MIDDLESEX          MA   AMATEUR RADIO

            LARGE BRANCH DOWN ON COX STREET.

1039 AM     NON-TSTM WND DMG MEDWAY                  42.13N  71.40W
12/21/2018                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN ACROSS ROAD ON WELLINGTON STREET BY NORFOLK
            AVENUE.

&&

EVENT NUMBER BOX1805699
EVENT NUMBER BOX1805700
EVENT NUMBER BOX1805701
EVENT NUMBER BOX1805702
EVENT NUMBER BOX1805703
EVENT NUMBER BOX1805704
EVENT NUMBER BOX1805705
EVENT NUMBER BOX1805706
EVENT NUMBER BOX1805707
EVENT NUMBER BOX1805708
EVENT NUMBER BOX1805709

KAB

The radar

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

Open the radar archive at this moment

Event by event

1 strong wind, 1 flood. Local standard time, as filed.

Strong Wind, Hartford

When
December 21, 12:00 PM EST to 1:37 PM EST
Where
Hartford forecast zone
Measured
40 kt (46 mph) estimated gust
Property damage
$2,000
Reported by
Amateur Radio
Coordinates
41.819, -72.572 (the zone’s center; the record gives no point)

At Noon EST, a tree was reported down on Orchard Road in West Hartford. At 1:37 PM EST power lines were reported down across a driveway on Curtis Street in Bristol.

Flood, Hartford

When
December 21, 2:10 PM EST to 4:10 PM EST
Where
Hartford County, 0.48 mi NE of Burnside to 0.45 mi NE of Burnside
Cause
Heavy Rain
Reported by
Amateur Radio
Coordinates
41.786, -72.614

At 2:05 PM EST, multiple cars were trapped in eighteen inches of flood waters at junction of School Street and Prestige Park Road in East Hartford.

What these are

Strong Wind
Non-thunderstorm winds below high wind criteria that nonetheless caused damage or casualties.
Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.

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

The same day elsewhere

More

Every storm in Connecticut in 2018Every state in 2018This day in weather historyWarnings in Connecticut, December 2018

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: 794962, 795070.