Flood and Hail in Massachusetts, June 29, 2020

Name: Flood and Hail in Massachusetts, June 29, 2020
Start: 2020-06-29T08:40
End: 2020-06-29T14:12
Location: Massachusetts

June 29, 2020 · NWS BOX · 18 events in 5 counties and zones

A mid-level cold pool provided the instability for scattered severe thunderstorms, with large hail and damaging winds in western Massachusetts and northern Connecticut during the mid-afternoon hours. Franklin County, MA was particularly hard-hit by damaging winds.

Where it happened

Every event with a place to put it. 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: $126,000
Crop damage: None recorded
Events: 18

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.

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 Jun 29, 6:46 AM EST, 1 hour 54 minutes earlier.

Area forecast discussion, Jun 29, 6:46 AM EST, 1 hour 54 minutes before

Area Forecast Discussion
National Weather Service Boston/Norton MA
746 AM EDT Mon Jun 29 2020

.SYNOPSIS...

A broad area of low pressure aloft will move over New England
through midweek with another disturbance toward the end of the
week. This will result in an unsettled pattern for the upcoming
week with scattered showers and thunderstorms at times, but a
washout is not expected. Warm and dry weather is expected for
next weekend.

&&

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

7 AM Update...

No changes in the latest update.

Previous discussion...

A mid level cold pool will remain over New England today, with
a weak surface low pressure stalled over the eastern coastal
waters. Thew present of the cold pool means mid level lapse
rates of 6-7 degrees C/km. Expecting another round of showers
today. Rainfall could be at just about anytime today, but
especially during this afternoon into this evening. CAPE values
should reach 1,000-2,000 J/kg once more. However, the wind shear
looks to be a bit lacking compared to yesterday. Not expecting
as many strong thunderstorms today, but cannot completely
dismiss the idea. Am more concerned about downpours, especially
for the areas which saw significant rainfall Sunday.

Near to slightly below normal temperatures today.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM TUESDAY/...

Not much changes aloft tonight into Tuesday. Mid level cold pool
and surface low just to the east will keep at least some risk
for a shower through this period. Expecting the coverage of
showers to be greatest during the typical afternoon and evening
hours Tuesday.

Near normal low temperatures tonight, with below normal high
temperatures Tuesday.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...

Highlights

* Scattered to isolated diurnal shower and thunderstorm chances
  Wednesday and Thursday. Temperatures trending warmer.

* Cannot rule out showers late in the week and over the weekend,
  but does appear to be a drier pattern.

Tuesday night through Thursday...

Omega block remains in place through Thursday. The ridge axis
associated with the block extends roughly from the Lower
Mississippi River Valley through the central Great Lakes and
into northern Ontario. New England will have an upper low
rotating over the region throughout this period. Upper low
begins to breakdown and lift offshore on Thursday.

Daily shower and thunderstorm activity expected with the upper
low overhead. This will keep a -10 to -15 degree Celsius cold
pool aloft at 500 hPa. The combination of the cold pool and
diurnal heating will result in scattered to isolated shower and
thunderstorm activity. This activity will linger into the night
time as the cold pool remains in place. Shear will be weak at generally
25 kts or less within the 0-6 km layer, so storms will remain
pulse like. This will result in many areas remaining dry, but
there is 1 to 1.5 inches of PWATs in place. This could bring
periods of heavy rain. MUCAPE values range from a few hundred
J/kg closer to the coast to 1500 J/kg across the interior.

As with the previous night, tapered down precipitation chances
late and removed thunder chances after 09Z.

Temperatures rising in comparison to earlier in the week as flow
shifts from onshore to northerly/northwesterly. Cooler on
Wednesday as there is a bit more of an onshore wind component as
opposed to Thursday.

Friday through Sunday...

Upper low offshore, but remain under cyclonic flow through the
weekend. Hard to time a few shortwaves going through, so have
kept the NBM guidance due to model differences. Cannot rule out
showers through the weekend, but think it will be drier in
comparison to the first half of the week.

High temperatures range from the mid 70s to the 80s.

&&

.AVIATION /12Z MONDAY THROUGH FRIDAY/...

Forecaster Confidence Levels...

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

Today...Moderate confidence.

MVFR/IFR cigs slowly improving to VFR across the interior this
afternoon, but MVFR cigs likely persisting across eastern MA.
Periods of showers with a few thunderstorms developing. Did
delay the onset of showers across eastern MA based on latest
obs. Think it will take a few hours of heating to fire more
activity up.

Tonight...Moderate confidence.

MVFR to LIFR stratus and patchy fog expected to redevelop, but
areal extent is uncertain. Periods of showers.

Tuesday...Moderate confidence.

MVFR/IFR stratus towards the east coast. MVFR trending to VFR
farther inland. Periods of showers, with a chance for a few
thunderstorms.

KBOS Terminal...Moderate confidence in TAF, mainly due to timing
issues for showers. Lower risk for thunderstorms this afternoon
and evening. Left out of the TAF until timing is better known.

KBDL Terminal...Moderate confidence in TAF, mainly due to timing
issues for showers.

Outlook /Tuesday Night through Friday/...

Tuesday Night: Mainly MVFR, with areas IFR possible. Chance
SHRA, isolated TSRA.

Wednesday: Mainly MVFR, with local IFR possible. Chance SHRA,
isolated TSRA.

Wednesday Night: Mainly VFR, with local MVFR possible. Slight
chance SHRA, isolated TSRA.

Thursday: Mainly VFR, with areas MVFR possible. Slight chance
SHRA, isolated TSRA.

Thursday Night: VFR.

Friday: Mainly VFR, with areas MVFR possible. Slight chance
SHRA.

&&

.MARINE...

Winds and seas will remain below Small Craft Advisory
thresholds through Tuesday. Periods of showers, with a few
thunderstorms possible at times. Visibility reduced in heavier
showers.

Outlook /Tuesday Night through Friday/...

Tuesday Night through Wednesday: Winds less than 25 kt. Areas
of seas approaching 5 ft. Chance of rain showers, isolated
thunderstorms.

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

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

Thursday Night: Winds less than 25 kt.

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

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

SYNOPSIS...Belk/BL
NEAR TERM...Belk/BL
SHORT TERM...Belk
LONG TERM...BL
AVIATION...Belk/BL
MARINE...Belk/BL

Hazardous weather outlook, Jun 29, 3:23 AM EST, 5 hours 17 minutes before

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
423 AM EDT Mon Jun 29 2020

CTZ002>004-MAZ002>024-026-RIZ001>008-300830-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Northern Worcester MA-Central Middlesex MA-
Western Essex MA-Eastern 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-Barnstable MA-Dukes MA-Nantucket MA-
Northern Middlesex MA-Northwest Providence RI-
Southeast Providence RI-Western Kent RI-Eastern Kent RI-Bristol RI-
Washington RI-Newport RI-Block Island RI-
423 AM EDT Mon Jun 29 2020

This Hazardous Weather Outlook is for northern Connecticut, all of
Massachusetts east of Berkshire County, and Rhode Island.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-300830-
Boston Harbor-Cape Cod Bay-Nantucket Sound-Vineyard Sound-
Buzzards Bay-Rhode Island Sound-Narragansett Bay-Block Island Sound-
Coastal waters east of Ipswich Bay and the Stellwagen Bank National
Marine Sanctuary-Massachusetts Bay and Ipswich Bay-
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-
423 AM EDT Mon Jun 29 2020

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

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

For more information on upcoming hazardous weather, please see the
Area Forecast Discussion on our webpage for the latest forecast
thinking. There is also our Enhanced Hazardous Weather Outlook at
www.weather.gov/box/ehwo

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

You can follow us on Facebook at
www.facebook.com/us.nationalweatherservice.boston.gov

You can follow us on Twitter at
@NWSBoston

In the hours before

Special weather statement, Jun 29, 3:38 AM EST, 5 hours 2 minutes before

Special Weather Statement
National Weather Service Boston/Norton MA
438 AM EDT Mon Jun 29 2020

MAZ022-023-290930-
Dukes MA-Barnstable MA-
438 AM EDT Mon Jun 29 2020

...STRONG THUNDERSTORM OVER SOUTHWEST BUZZARDS BAY...

At 438 AM EDT, Doppler radar was tracking a strong thunderstorm near
Gosnold, or 9 miles south of Dartmouth, moving east at 15 mph.

Penny size hail and winds in excess of 40 mph will accompany this
storm.

Locations impacted include...
Falmouth, Oak Bluffs, Edgartown, Tisbury, West Tisbury, Chilmark and
Gosnold.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

Frequent lightning was occurring. Lightning can strike far away from
the storm. Go inside a building or vehicle. Wait at least 30 minutes
until after the storm has passed to resume outdoor activities.

&&

LAT...LON 4141 7095 4143 7089 4145 7092 4145 7090
      4141 7075 4141 7071 4147 7076 4144 7084
      4145 7084 4152 7070 4146 7063 4153 7069
      4153 7068 4162 7065 4165 7056 4155 7053
      4152 7065 4138 7047
TIME...MOT...LOC 0837Z 255DEG 15KT 4143 7097

BL

Local storm report, Jun 29, 6:35 AM EST, 2 hours 5 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
735 AM EDT MON JUN 29 2020

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

0129 PM     TSTM WND DMG     NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            TREE AND POWERLINES DOWN ON HIGHLAND AVE.

0130 PM     HAIL             WATERTOWN               42.37N  71.18W
06/28/2020  M1.00 INCH       MIDDLESEX          MA   AMATEUR RADIO

            WATERTOWN SQUARE

0133 PM     FLOOD            WATERTOWN               42.37N  71.18W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            FLOODING AT THE BOTTOM OF HOWARD STREET WITH ONE OF THE
            MANHOLE COVERS STARTING TO FLOAT.

0137 PM     FLOOD            WALTHAM                 42.39N  71.24W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            MAIN STREET FROM BEAL TO BOWKER ROAD FLOODED AND
            IMPASSABLE.

0140 PM     TSTM WND DMG     NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            TREE DOWN BLOCKING LEWIS TERRACE AT WASHINGTON STREET.
            A SECOND TREE AND WIRES DOWN IN THE SAME AREA.

0144 PM     FLOOD            NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            TWO CARS REMOVED FROM FLOOD WATERS NEAR 100 WALNUT
            STREET.

0147 PM     FLOOD            NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            ADAMS STREET FLOODED AND IMPASSABLE FROM WATERTOWN TO
            COTTAGE.

0148 PM     FLOOD            WOBURN                  42.49N  71.16W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            FLOODING AT OLYMPIA AND WILDWOOD ROAD.

0150 PM     TSTM WND DMG     NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            NEWTON PD RESPONDING TO NONANTUM ROAD AND CHARLESBANK
            ROAD FOR A TREE DOWN ON THE ROAD.

0153 PM     TSTM WND DMG     NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            TREES CROSSING ROAD AND POWERLINES ON CARVER ROAD

0159 PM     TSTM WND DMG     BROOKLINE               42.32N  71.14W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN ON A BUILDING ON PERRY ROAD.

0159 PM     TSTM WND DMG     NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            TREE DOWN BLOCKING THE ROAD ON BORDER STREET.

0200 PM     HAIL             JAMAICA PLAIN           42.31N  71.12W
06/28/2020  M0.75 INCH       SUFFOLK            MA   PUBLIC

0200 PM     TSTM WND DMG     WEST ROXBURY            42.28N  71.17W
06/28/2020                   SUFFOLK            MA   AMATEUR RADIO

            POWERLINES DOWN AT CALUMET STREET

0201 PM     TSTM WND DMG     BROOKLINE               42.32N  71.14W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN AT THE 200 BLOCK OF WALNUT STREET

0208 PM     TSTM WND DMG     REVERE                  42.42N  70.99W
06/28/2020                   SUFFOLK            MA   AMATEUR RADIO

            LARGE TREE BRANCH DOWN ON VEHICLE AND BLOCKING
            RESERVOIR AVE.

0210 PM     TSTM WND DMG     NEWTON                  42.33N  71.21W
06/28/2020                   MIDDLESEX          MA   AMATEUR RADIO

            PLEASANT STREET, TREE DOWN AGAINST A HOUSE WITH WIRES
            DOWN.

0214 PM     FLOOD            WEST ROXBURY            42.28N  71.17W
06/28/2020                   SUFFOLK            MA   AMATEUR RADIO

            CEDAR STREET FLOODING FOR 3-4 BLOCKS DUE TO CATCH
            BASIN.

0230 PM     FLOOD            BROOKLINE               42.32N  71.14W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            WARWICK RD AT BEACON ST CLOSED DUE TO FLOODING.

0235 PM     FLOOD            BRIGHTON                42.35N  71.15W
06/28/2020                   SUFFOLK            MA   AMATEUR RADIO

            STREET FLOODING AT THE 90 BLOCK OF STRATHMORE ROAD.

0237 PM     TSTM WND DMG     BOSTON                  42.32N  71.07W
06/28/2020                   SUFFOLK            MA   AMATEUR RADIO

            TREE FELL ON ROAD NEAR GREEN LINE MBTA OUTBOUND TRACKS
            NEAR HUNTINGTON AVE.

0242 PM     TSTM WND DMG     HULL                    42.30N  70.90W
06/28/2020                   PLYMOUTH           MA   AMATEUR RADIO

            DOWNED TREE AT 288 ATLANTIC AVE BY THE BASEBALL FIELD.

0245 PM     TSTM WND DMG     HINGHAM                 42.24N  70.89W
06/28/2020                   PLYMOUTH           MA   AMATEUR RADIO

            LARGE TREE BRANCH DOWN BLOCKING ROCKLAND ROAD AT
            MARTINS LANE.

0309 PM     TSTM WND DMG     COHASSET                42.23N  70.80W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN ON JERUSALEM ROAD, SECOND TREE DOWN AT JOY
            PLACE AND NORTH MAIN STREET.

0329 PM     TSTM WND DMG     QUINCY                  42.26N  71.01W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN AT PERLEY PLACE, BLOCKING ROAD.

0332 PM     FLOOD            HOLYOKE                 42.21N  72.64W
06/28/2020                   HAMPDEN            MA   AMATEUR RADIO

            FLOODING AT COMERICAL ST AND SARGENT ST.

0348 PM     HAIL             NORTHAMPTON             42.33N  72.68W
06/28/2020  M1.25 INCH       HAMPSHIRE          MA   AMATEUR RADIO

0356 PM     HAIL             EASTHAMPTON             42.27N  72.68W
06/28/2020  M1.50 INCH       HAMPSHIRE          MA   PUBLIC

            FORWARDED BY MEDIA.

0358 PM     HAIL             EASTHAMPTON             42.27N  72.68W
06/28/2020  M1.75 INCH       HAMPSHIRE          MA   PUBLIC

            FORWARDED BY MEDIA.

0401 PM     TSTM WND DMG     EASTHAMPTON             42.27N  72.68W
06/28/2020                   HAMPSHIRE          MA   AMATEUR RADIO

            TREE DOWN ON ROUTE 202 AT NORTHAMPTON LINE

0416 PM     TSTM WND DMG     MILTON                  42.24N  71.08W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREE AND WIRES DOWN ON RANDOLF AVE.

0440 PM     HAIL             NORWOOD                 42.19N  71.20W
06/28/2020  M1.00 INCH       NORFOLK            MA   BROADCAST MEDIA

0440 PM     FLOOD            NORWOOD                 42.19N  71.20W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            SECTION OF RT 1 FLOODED WITH UP TO 1-FOOT OF WATER.

0446 PM     FLOOD            NORWOOD                 42.19N  71.20W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            BROADWAY IS FLOODED AND IMPASSABLE.

0450 PM     HAIL             FRANKLIN                42.09N  71.39W
06/28/2020  M1.00 INCH       NORFOLK            MA   PUBLIC

0500 PM     FLOOD            NORWOOD                 42.19N  71.20W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            LANDSDOWNE WAY IS FLOODED AND IMPASSABLE.

0502 PM     FLOOD            NORWOOD                 42.19N  71.20W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            4-FEET OF WATER IN BASEMENT OF HOSPITAL

0510 PM     FLOOD            STOUGHTON               42.12N  71.10W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            FLOODING ON PEARL STREET; AT LEAST 3-4 INCHES OF WATER
            ON THE ROADWAY.

0510 PM     TSTM WND DMG     WILBRAHAM               42.14N  72.44W
06/28/2020                   HAMPDEN            MA   AMATEUR RADIO

            LARGE TREE AND WIRES DOWN ON MOUNTAIN ROAD.

0520 PM     TSTM WND DMG     CANTON                  42.15N  71.13W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            LARGE TREE DOWN ON ELM STREET

0522 PM     FLOOD            NORWOOD                 42.19N  71.20W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            WASHINGTON STREET IS THE AREA OF NORWOOD HOSPITAL IS
            FLOODED AND IMPASSABLE. NORWOOD HOSPITAL HAS 4FT OF
            WATER IN THE BASEMENT.

0527 PM     FLOOD            WESTWOOD                42.22N  71.22W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            CAR STUCK IN FLOOD WATERS ON EAST STREET.

0530 PM     TSTM WND DMG     WESTWOOD                42.22N  71.22W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            LARGE TREE DOWN ON OAK STREET

0530 PM     TSTM WND DMG     NORFOLK                 42.12N  71.32W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREES AND WIRES DOWN ON KINGSBURY ROAD.

0531 PM     FLOOD            NORTHBRIDGE             42.15N  71.65W
06/28/2020                   WORCESTER          MA   TRAINED SPOTTER

            3-FT OF WATER ON CROSS ST NEAR EAST ST.

0535 PM     TSTM WND DMG     WALPOLE                 42.14N  71.24W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            WIRES DOWN ON BULLARD STREET

0544 PM     TSTM WND DMG     AVON                    42.12N  71.03W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            TREE DOWN ON NORTH MAIN STREET IN AVON.

0545 PM     FLOOD            BROCKTON                42.08N  71.03W
06/28/2020                   PLYMOUTH           MA   AMATEUR RADIO

            FLOODING ON WEST STREET, WITH POPPED MANHOLE COVERS.

0549 PM     FLOOD            NORTHBRIDGE             42.15N  71.65W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            FLOODING ON CHURCH STREET ROAD IS IMPASSABLE.

0550 PM     TSTM WND DMG     BROCKTON                42.08N  71.03W
06/28/2020                   PLYMOUTH           MA   AMATEUR RADIO

            TREE AND WIRES DOWN ON RIDGE STREET, SPARK STREET, AND
            CIRCLE STREET.

0551 PM     FLOOD            HOPEDALE                42.13N  71.54W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            ADIN STREET AT ROUTE 16 FLOODED.

0557 PM     FLOOD            WRENTHAM                42.07N  71.33W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            FLOODING OF A FINISHED BASEMENT ON MARTIN LANE.

0600 PM     FLOOD            BROCKTON                42.08N  71.03W
06/28/2020                   PLYMOUTH           MA   AMATEUR RADIO

            JEEP STUCK IN FLOOD WATERS ON TORREY AT CALVIN STREET.
            A CAR WAS STUCK IN FLOODING ON AMES STREET.

0600 PM     TSTM WND DMG     ABINGTON                42.12N  70.96W
06/28/2020                   PLYMOUTH           MA   AMATEUR RADIO

            TREE DOWN ON A HOUSE AND CAR ON DAVIS STREET. A SECOND
            TREE DOWN ALSO ON DAVIS STREET.

0605 PM     TSTM WND DMG     UXBRIDGE                42.08N  71.60W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            TREE DOWN ON PAINE STREET

0606 PM     FLOOD            NORTHBRIDGE             42.15N  71.65W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            MULTIPLE FLOODED BACKYARDS AND BASEMENTS ON BROOK
            STREET AND DOUGLAS ROAD.

0616 PM     FLOOD            NORTHBRIDGE             42.15N  71.65W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            TWO APARTMENTS FLOODED ON WILLOW STREET.

0616 PM     FLOOD            WRENTHAM                42.07N  71.33W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            FLOODED BASEMENT ON CHESTNUT STREET

0618 PM     FLOOD            FRANKLIN                42.09N  71.39W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            BASEMENT FLOODED ON WASHINGTON STREET.

0618 PM     FLOOD            FRANKLIN                42.09N  71.39W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            31 BROOK STREET FLOODED AND IMPASSABLE.

0619 PM     FLOOD            1 N BLACKSTONE          42.03N  71.50W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            TWO CARS STUCK IN FLOOD WATERS ON RATHBURN STREET -
            ROADWAY IMPASSABLE.

0619 PM     FLOOD            NORTH ATTLEBORO         41.97N  71.33W
06/28/2020                   BRISTOL            MA   AMATEUR RADIO

            ROADWAY FLOODED AT LANDRY AVE AND KELLY BLVD.

0636 PM     FLOOD            UXBRIDGE                42.08N  71.60W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            MANY SECTIONS OF QUAKER HIGHWAY FLOODED WITH DEBRIS
            ACROSS THE ROAD. ALSO, ROUTE 122 FLOODED WITH ROCKS IN
            THE ROAD.

0642 PM     HAIL             BURRILLVILLE            41.95N  71.72W
06/28/2020  M1.25 INCH       PROVIDENCE         RI   PUBLIC

0645 PM     FLOOD            BURRILLVILLE            41.95N  71.72W
06/28/2020                   PROVIDENCE         RI   LOCAL OFFICIAL

            HARRISVILLE FIRE DEPARTMENT IS RESPONDING TO WATER
            EMERGENCY CALLS.

0645 PM     FLOOD            FRANKLIN                42.09N  71.39W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            FLOODED BASEMENT ON JORDAN ROAD. STREET FLOODING ON
            SARGENT LANE AT DARTMOUTH ROAD.

0648 PM     FLOOD            BURRILLVILLE            41.95N  71.72W
06/28/2020                   PROVIDENCE         RI   AMATEUR RADIO

            CAR STUCK IN FLOOD WATERS ON VICTORY HIGHWAY, WHICH WAS
            FLOODED AND IMPASSABLE BETWEEN OAKLAND SCHOOL STREET AND
            REMINGTON AVENUE.

0654 PM     FLOOD            BURRILLVILLE            41.95N  71.72W
06/28/2020                   PROVIDENCE         RI   AMATEUR RADIO

            ONE FOOT OF STREET FLOODING REPORTED ON MAIN STREET IN
            THE HARRISVILLE SECTION.

0718 PM     FLOOD            GARDNER                 42.58N  71.99W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            FLOODING, WITH NEARLY ONE FOOT OF WATER ON A SECTION OF
            ROUTE 2A IN GARDNER.

0720 PM     FLOOD            PAWTUCKET               41.87N  71.37W
06/28/2020                   PROVIDENCE         RI   AMATEUR RADIO

            ARMISTICE BLVD FLOODED AND IMPASSABLE INFRONT OF THE
            DPW BUILDING.

0739 PM     FLOOD            NORFOLK                 42.12N  71.32W
06/28/2020                   NORFOLK            MA   AMATEUR RADIO

            FLOODING ON FLEETWOOD DRIVE CAUSED FLOODING INTO THE
            BASEMENT OF A HOME ON ROCKWOOD ROAD (RTE. 115).

0743 PM     FLOOD            GARDNER                 42.58N  71.99W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            CAR STUCK IN FLOOD WATERS ON TIMPANY BLVD.

0748 PM     FLOOD            GARDNER                 42.58N  71.99W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            CHESTNUT STREET AT UNION SQUARE FLOODED AND IMPASSABLE.

0753 PM     FLOOD            FITCHBURG               42.59N  71.82W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            CAR STUCK IN FLOODING ON PRINCETON ROAD ON THE
            PRINCETON ROAD BRIDGE.

0758 PM     FLOOD            GARDNER                 42.58N  71.99W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            A BASEMENT WAS FLOODED ON DEAN STREET IN GARDNER.

0815 PM     FLOOD            GARDNER                 42.58N  71.99W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            ON JEAN STREET, THERE WAS ONE FOOT OF STREET FLOODING,
            THE GREENWOOD PLAYGROUND WAS FLOODED, AND THERE WERE
            FLOODED BASEMENTS.

0830 PM     FLOOD            WORCESTER               42.27N  71.81W
06/28/2020                   WORCESTER          MA   AMATEUR RADIO

            FLOODING ON WEST BOYLSTON STREET, THREE FEET OF WATER
            ON THE ROAD, CAR STUCK IN FLOOD WATERS.

&&

EVENT NUMBER BOX2001523 BOX2001536 BOX2001524 BOX2001525 BOX2001528
BOX2001529 BOX2001530 BOX2001526 BOX2001527 BOX2001531 BOX2001533
BOX2001534 BOX2001532 BOX2001539 BOX2001535 BOX2001537 BOX2001538
BOX2001540 BOX2001541 BOX2001542 BOX2001545 BOX2001544 BOX2001543
BOX2001548 BOX2001549 BOX2001557 BOX2001552 BOX2001547 BOX2001546
BOX2001550 BOX2001551 BOX2001553 BOX2001554 BOX2001555 BOX2001556
BOX2001558 BOX2001559 BOX2001560 BOX2001587 BOX2001561 BOX2001562
BOX2001563 BOX2001564 BOX2001573 BOX2001565 BOX2001566 BOX2001575
BOX2001572 BOX2001567 BOX2001588 BOX2001574 BOX2001578 BOX2001577
BOX2001580 BOX2001589 BOX2001579 BOX2001590 BOX2001591 BOX2001592
BOX2001593 BOX2001594 BOX2001595 BOX2001596 BOX2001568 BOX2001569
BOX2001597 BOX2001570 BOX2001571 BOX2001585 BOX2001598 BOX2001576
BOX2001582 BOX2001581 BOX2001583 BOX2001584 BOX2001586 BOX2001599

TG

Special weather statement, Jun 29, 6:35 AM EST, 2 hours 5 minutes before

Special Weather Statement
National Weather Service Boston/Norton MA
735 AM EDT Mon Jun 29 2020

MAZ022-291215-
Barnstable MA-
735 AM EDT Mon Jun 29 2020

...STRONG THUNDERSTORM...

At 735 AM EDT, Doppler radar was tracking a strong thunderstorm near
Yarmouth, or near Barnstable, moving northeast at 20 mph.

Penny size hail and winds in excess of 40 mph will accompany this
storm.

Locations impacted include...
Barnstable, Brewster, Yarmouth and Dennis.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

&&

LAT...LON 4174 7008 4168 7027 4173 7031 4174 7030
      4173 7028 4172 7027 4173 7029 4171 7026
      4174 7022 4175 7019 4176 7011
TIME...MOT...LOC 1135Z 236DEG 18KT 4172 7025

BW

Special weather statement, Jun 29, 7:15 AM EST, 1 hour 25 minutes before

Special Weather Statement
National Weather Service Boston/Norton MA
815 AM EDT Mon Jun 29 2020

MAZ022-291245-
Barnstable MA-
815 AM EDT Mon Jun 29 2020

...STRONG THUNDERSTORMS DEVELOPING...

At 815 AM EDT, Doppler radar was tracking a strong thunderstorm over
Eastham, or 9 miles northeast of Brewster, moving northeast at 45
mph.

Pea size hail and winds in excess of 30 mph will accompany this
storm.

Locations impacted include...
Orleans, Eastham and Wellfleet.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

&&

LAT...LON 4177 7000 4180 7001 4181 7000 4188 7001
      4189 7000 4190 7002 4190 7000 4191 7000
      4192 6998 4188 6995 4180 6994
TIME...MOT...LOC 1215Z 236DEG 39KT 4186 6996

BW

Special weather statement, Jun 29, 8:24 AM EST, 16 minutes before

Special Weather Statement
National Weather Service Boston/Norton MA
924 AM EDT Mon Jun 29 2020

MAZ024-291400-
Nantucket MA-
924 AM EDT Mon Jun 29 2020

...STRONG THUNDERSTORM OVER NANTUCKET...

At 923 AM EDT, Doppler radar was tracking a strong thunderstorm near
Nantucket, moving northeast at 25 mph.

Penny size hail and winds in excess of 30 mph will accompany this
storm.

Locations impacted include...
Nantucket.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

&&

LAT...LON 4124 7000 4124 7012 4127 7021 4130 7019
      4130 7010 4128 7009 4129 7007 4130 7009
      4130 7007 4132 7000 4135 7002 4133 7004
      4139 7004 4128 6996 4126 6996
TIME...MOT...LOC 1323Z 244DEG 20KT 4124 7009

BW

The radar

The Boston radar (KBOX), 118 km away, was scanning. The volume nearest the first event began at 13:40 UTC.

Open the radar archive at this moment

Event by event

12 thunderstorm wind, 5 hail, 1 flood. Local standard time, as filed.

Hail, Nantucket

When: June 29, 8:40 AM EST
Where: Nantucket County, 0.69 mi N of (Ack)nantucket Mem A
Measured: 0.75 in hail
Reported by: Amateur Radio
Coordinates: 41.260, -70.070

Dime size hail was reported on Nantucket.

Hail, Bristol

When: June 29, 12:59 PM EST
Where: Bristol County, 1.24 mi SE of Fairhaven
Measured: 0.75 in hail
Reported by: Amateur Radio
Coordinates: 41.640, -70.900

Dime size hail was reported in New Bedford.

Hail, Franklin

When: June 29, 12:59 PM EST to 1:00 PM EST
Where: Franklin County, Rowe
Measured: 1.25 in hail
Reported by: Amateur Radio
Coordinates: 42.700, -72.900

In Rowe, quarter size hail at 1259 PM EST (159 PM EDT) increased to half dollar size hail at 100 PM EST (200 PM EDT).

Thunderstorm Wind, Franklin

When: June 29, 1:10 PM EST
Where: Franklin County, 1.24 mi E of Conway
Measured: 50 kt (58 mph) estimated gust
Property damage: $1,000
Reported by: Amateur Radio
Coordinates: 42.523, -72.656

In Conway, trees and wires were down on Hoosac Road.

Thunderstorm Wind, Franklin

When: June 29, 1:10 PM EST
Where: Franklin County, 1.08 mi SW of Spruce Corner
Measured: 50 kt (58 mph) estimated gust
Property damage: $1,000
Reported by: Amateur Radio
Coordinates: 42.488, -72.864

In Ashfield, trees and wires were down on Cummington Road.

Flood, Bristol

When: June 29, 1:16 PM EST
Where: Bristol County, 0.51 mi WNW of Fairhaven to 0.44 mi NW of Fairhaven
Cause: Heavy Rain
Reported by: Amateur Radio
Coordinates: 41.654, -70.928

A foot of water was reported on the Route 18 North ramp to I-195.

Thunderstorm Wind, Franklin

When: June 29, 1:26 PM EST
Where: Franklin County, 1.29 mi N of West Deerfield to 0.39 mi WNW of Sunderland
Measured: 56 kt (64 mph) estimated gust
Property damage: $70,000
Reported by: Amateur Radio
Coordinates: 42.549, -72.628

In Deerfield, a tree fell into a house, causing extensive damage, per an amateur radio report. Another tree caused house damage on Beaver Road, according to the Greenfield Recorder newspaper. A tree was down on wires on Mountain Road. A tree was down on Greenfield Road and a tree was down on Hillside Road. Wires were reported down on Oak Knoll Drive.

Hail, Franklin

When: June 29, 1:29 PM EST
Where: Franklin County, Hawley
Measured: 1 in hail
Reported by: Public
Coordinates: 42.570, -72.880

In Hawley, the public reported quarter size hail.

Thunderstorm Wind, Franklin

When: June 29, 1:38 PM EST
Where: Franklin County, 0.57 mi NNE of East Shelburne
Measured: 50 kt (58 mph) estimated gust
Property damage: $500
Reported by: Amateur Radio
Coordinates: 42.637, -72.664

In Shelburne Falls, a tree was down on Fiske Mill Road.

Thunderstorm Wind, Franklin

When: June 29, 1:39 PM EST
Where: Franklin County, 0.34 mi ENE of West Whately to 2.28 mi SSE of East Whately
Measured: 61 kt (70 mph) estimated gust
Property damage: $40,000
Reported by: Newspaper
Coordinates: 42.432, -72.674

A 200-foot long tobacco barn, located where Long Plain Road becomes Straits Road, collapsed and was considered a complete loss from strong downburst winds, estimated around 70 mph. The barn had shifted toward the south during the storm, causing it to collapse. Damage also occurred to a dump truck and trailer that were inside the barn, which has recently been used for storage, instead of tobacco, according to a Greenfield Recorder article. Several other trees were downed near the location of the barn. In addition, amateur radio operators reported a tree down on Webber Road.

Thunderstorm Wind, Hampshire

When: June 29, 1:40 PM EST
Where: Hampshire County, 0.13 mi SSW of Searsville to 1.65 mi NE of Haydenville
Measured: 52 kt (60 mph) estimated gust
Property damage: $5,000
Reported by: Amateur Radio
Coordinates: 42.398, -72.731

In Williamsburg, trees were reported down on North Street, Mountain Road, and Depot Road.

Thunderstorm Wind, Hampshire

When: June 29, 1:45 PM EST
Where: Hampshire County, 0.67 mi WSW of Bay State to 0.31 mi NNW of Bay State
Measured: 50 kt (58 mph) estimated gust
Property damage: $2,000
Reported by: Amateur Radio
Coordinates: 42.328, -72.683

In Northampton in the Florence section of town, trees were down on both Ryan Road and on Maple Street.

Thunderstorm Wind, Hampshire

When: June 29, 1:49 PM EST
Where: Hampshire County, 1.31 mi ENE of Bradstreet
Measured: 50 kt (58 mph) estimated gust
Property damage: $500
Reported by: Amateur Radio
Coordinates: 42.425, -72.555

In the northern part of Hadley, a tree was down blocking a road at the Hadley/Sunderland town line.

Thunderstorm Wind, Franklin

When: June 29, 1:50 PM EST
Where: Franklin County, 1.02 mi S of Sunderland to 0.74 mi S of Sunderland
Measured: 50 kt (58 mph) estimated gust
Property damage: $4,000
Reported by: Amateur Radio
Coordinates: 42.456, -72.584

In Sunderland a tree was down on a house on Old Amherst Road. Also, a tree was down on Route 47 (River Road).

Thunderstorm Wind, Hampshire

When: June 29, 1:55 PM EST
Where: Hampshire County, 0.54 mi ENE of South Hadley Falls
Measured: 50 kt (58 mph) estimated gust
Property damage: $500
Reported by: Amateur Radio
Coordinates: 42.223, -72.590

In South Hadley, a tree was down on the Route 202 South rotary.

Thunderstorm Wind, Hampden

When: June 29, 1:56 PM EST
Where: Hampden County, 0.48 mi SE of Highlands
Measured: 50 kt (58 mph) estimated gust
Property damage: $1,000
Reported by: Amateur Radio
Coordinates: 42.216, -72.622

In Holyoke, trees and wires were down on Lincoln Street.

Hail, Hampden

When: June 29, 2:06 PM EST
Where: Hampden County, 0.86 mi SW of East Springfield
Measured: 0.75 in hail
Reported by: Amateur Radio
Coordinates: 42.120, -72.540

Dime size hail was reported in Springfield.

Thunderstorm Wind, Hampden

When: June 29, 2:12 PM EST
Where: Hampden County, 1.07 mi S of Aldenville
Measured: 50 kt (58 mph) estimated gust
Property damage: $300
Reported by: Amateur Radio
Coordinates: 42.154, -72.598

In Chicopee, wires were down at the intersection of Granby Road and Nelson Street.

What these are

Hail: Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind: Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
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

Every storm in Massachusetts in 2020 Every state in 2020 This day in weather history Warnings in Massachusetts, June 2020

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: 900179, 900183, 900185, 900196, 900203, 900177, 900221, 900187, 900250, 900314, 900317, 900319, 900322, 900325, 900328, 900333, 900188, 900338.