Flash Flood Warning 50, NWS Boston/Norton, MA

429 
WGUS71 KBOX 081539
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
1139 AM EDT Tue Aug 8 2023

MAC005-023-RIC007-081549-
/O.CAN.KBOX.FF.W.0050.000000T0000Z-230808T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bristol MA-Plymouth MA-Providence RI-
1139 AM EDT Tue Aug 8 2023

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN BRISTOL, 
NORTHWESTERN PLYMOUTH AND NORTHEASTERN PROVIDENCE COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

A Flood Watch remains in effect until 1200 AM EDT Wednesday for 
portions of Massachusetts. Portions of Rhode Island.

LAT...LON 4202 7162 4208 7164 4219 7153 4236 7132
      4252 7116 4259 7101 4260 7101 4251 7082
      4240 7079 4241 7088 4233 7093 4229 7106
      4224 7114 4214 7129 4206 7142 4202 7153

$$

MAC009-017-021-025-027-081800-
/O.CON.KBOX.FF.W.0050.000000T0000Z-230808T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Essex MA-Middlesex MA-Norfolk MA-Suffolk MA-Worcester MA-
1139 AM EDT Tue Aug 8 2023

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 2 PM EDT THIS 
AFTERNOON FOR SOUTHEASTERN WORCESTER, NORTHWESTERN NORFOLK, SUFFOLK, 
SOUTH CENTRAL ESSEX AND SOUTHEASTERN MIDDLESEX COUNTIES...

At 1139 AM EDT, trained weather spotters reported significant street 
flooding in Wellesley and Natick from thunderstorms producing heavy 
rain across the warned area. Between 2 and 3.5 inches of rain have 
fallen, with the highest rainfall totals falling from Bellingham to 
Brookline. The expected rainfall rate is 0.5 to 1.5 inches in 1 
hour. Additional rainfall amounts up to 2 inches are possible in the 
warned area. Flash flooding is already occurring.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Trained spotters reported.

IMPACT...Flash flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other poor
         drainage and low-lying areas.

Some locations that will experience flash flooding include...
  Boston, Cambridge, Quincy, Lynn, Newton, Somerville, Framingham, 
  Waltham, Malden, Brookline, Medford, Revere, Peabody, Arlington, 
  Everett, Salem, Beverly, Woburn, Chelsea and Natick.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Move to higher ground now. Act quickly to protect your life.

Stay away or be swept away. River banks and culverts can become 
unstable and unsafe.

&&

LAT...LON 4202 7162 4208 7164 4219 7153 4236 7132
      4252 7116 4259 7101 4260 7101 4251 7082
      4240 7079 4241 7088 4233 7093 4229 7106
      4224 7114 4214 7129 4206 7142 4202 7153

FLASH FLOOD...OBSERVED
EXPECTED RAINFALL RATE...0.5-1.5 INCHES IN 1 HOUR

$$

AL

932 
WGUS71 KBOX 081739
FFSBOX

Flash Flood Statement
National Weather Service Boston/Norton MA
139 PM EDT Tue Aug 8 2023

MAC009-017-021-025-027-081749-
/O.CAN.KBOX.FF.W.0050.000000T0000Z-230808T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Essex MA-Middlesex MA-Norfolk MA-Suffolk MA-Worcester MA-
139 PM EDT Tue Aug 8 2023

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTHEASTERN WORCESTER, 
NORTHWESTERN NORFOLK, SUFFOLK, SOUTH CENTRAL ESSEX AND SOUTHEASTERN 
MIDDLESEX COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

A Flood Watch remains in effect until 1200 AM EDT Wednesday for 
portions of Massachusetts. Portions of Rhode Island.

LAT...LON 4202 7162 4208 7164 4219 7153 4236 7132
      4252 7116 4259 7101 4260 7101 4251 7082
      4240 7079 4241 7088 4233 7093 4229 7106
      4224 7114 4214 7129 4206 7142 4202 7153

$$

AL

Area Forecast Discussion
National Weather Service Boston/Norton MA
1019 AM EDT Tue Aug 8 2023

.SYNOPSIS...
Excessive rainfall and flood threat this morning and early
afternoon as showers and thunderstorms move over southern New
England. Another round of thunderstorms is possible by late
afternoon in interior Massachusetts and Connecticut. Drying out
on Wednesday, although unsettled conditions back to the region
Thursday- Sunday. Shower and thunderstorm chances will be
greatest Thursday afternoon and trend more scattered for the
weekend.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
1015 am update...

busy morning at the Weather Bureau. Have had a boundary set up
from around Lawrence MA southward into NE CT. To the east of
there, a solid southeasterly surface flow has been in place,
with lighter southerly winds to the west of that boundary. With
localized low level helicity along that boundary, we've had
several showers (not even thunderstorms) acquire rotation -- so
we are using the term "rotating supershower". One of them had
strong enough rotation to warrant a short lived tornado warning.
Further south, better instability is in place per SPC
mesoanalysis, and as a result we have seen a cluster of
thunderstorms develop over eastern Long Island and trek ENE.
Latest mesoanalysis and hi-res guidance suggests that the
cluster of t-storms will need to be watched closely for
additional tornadic potential the next few hours across SE MA
and the Cape.

The other issue we've been dealing with is areas receiving
repeated heavy downpours. As a result, some areas have seen 1-3" in
the last few hours, especially in a band right along that
boundary -- from Lawrence to Maynard, Framingham and south the
NW corner of RI. Even a few spots over 3" near Billerica. All of
this is resulting in minor flooding.

Modest updates to the hourly PoP and Wx grids based on latest
radar trends and recent HRRR runs. Expecting this round to
basically be off the coast by 1pm. Then we have a lull, with
possibly additional t-storms later this afternoon coming in from
the west.

Will maintain the Flood Watch for the time being.

750 AM Update: Only a few minor changes to POPs based off radar
trends and newer high-res guidance. Storms have developed some
weak rotation, generally north of the Route 9 corridor in Mass.
Our area of current focus is northeast MA for quick moving
storms that may contain weak rotation. Interestingly these
storms have had zero lightning, yet have rotation. Something to
keep in mind this morning, that a strong shower can produce weak
rotation. Forecast does remain on track, see previous forecast
below.

400 AM Update

Today

Highlights

* Heavy rainfall and thunderstorms expected this morning into early
  afternoon

* Flood Watch in effect for eastern MA and RI through this evening

* Thunderstorms will be accompanied by a low risk for damaging wind
  gusts or an isolated tornado/water spout.

* Additional storms possible late this afternoon/evening

Heavy Rainfall Threat

A flood watch has been put into effect for most of RI and eastern MA
as thunderstorms with torrential rainfall are forecast to develop
over southern New England this morning. Environmental parameters are
optimal for excessive rainfall as robust short-wave energy by August
standards traverses over the region this morning and afternoon.
PWATs in excess of 2 inches are sitting over the region at this time
with a deep warm cloud layer greater than 12000 feet supporting
efficient rainfall processes. Additionally, model forecasts for
height falls indicate that the strongest forcing for synoptic
ascent will come very close to coinciding with peak
heating/diurnal instability. CAPE values greater than 1000 J/kg
are forecast to develop over east and northeastern MA where both
the highest PWATs and synoptic forcing are forecast to reside.
As if the combination of these parameters was not enough, we're
also looking at an environment favorable for
backbuilding/training thunderstorms per NAM3K bufkit soundings.
So how much precip can we expect? 00Z HREF probability matched
mean 24 hour precip ranges from 2 to 3 inches across much of
eastern MA. Local probability matched means suggest the
potential for locally higher amounts nearly double those values.

Severe Weather Threat

While flooding is the main hazard of concern for today, we can't
forget that this system will be accompanied by fairly robust low-
level shear and helicity. 20 to 25 knots of 1km shear and 0-1km SRH
from 100 to 150 m2/s2 will be present as these storms move over the
region. This introduces a low risk for a tornado in southern New
England today (2 percent per SPC CWO). The limiting factor today for
severe thunderstorm potential (including tornadoes) will be the deep-
layer shear profile (unfavorable hodograph) and mid-level lapse
rates. Nonetheless, STP values from the HREF are in the 0.5 to 1
range across eastern MA, so we'll be watching KBOX radar closely for
any signs of rotation.

Timeline

KBOX radar is currently detecting mostly light showers west of I-495
at 330 am. Expect some showers to intensify into thunderstorms after
sunrise as day time heating ensues. Heaviest rainfall is generally
expected to be between 5 am and noon. Areas west of I-495 are
expected to experience the heavy rainfall between roughly 5am and
9am while areas east of I-495 including Boston would be in the 8am
to noon window. Areas across southeastern MA may see some clearing
by early afternoon while areas further norther may experience
another round of cold frontal showers and thunderstorms later this
afternoon and evening. There is a fair bit of uncertainty with
respect to this second batch of precip as the potential will rely
heavily on how the expected heavy rainfall this morning unfolds.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM WEDNESDAY/...
Tonight and Tomorrow

Any remaining showers/storms from this evening should diminish after
sunset when the cold frontal boundary is expected to be pushing
east of the region. This will be followed by gradual clearing
and lower dewpoints settling over the region for Wednesday.
While Wednesday looks to be sunny and dry with highs in the 80s,
deep mixing and steep low-level lapse rates will support gusty
northwest winds in the wake of the exiting cold front. 30 mph
gusts will be possible during the early afternoon hours when
diurnal mixing will be at its peak.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
Highlights

* Wednesday will be the pick of the week with the highest confidence
  the area will see dry conditions

* Unsettled end to the workweek and into the weekend

Wednesday will bring a brief reprieve from the continuous unsettled
pattern we have been entrenched in for the last several weeks as
weak ridging and surface high pressure settles over the region. With
that said, we are not immune to some scattered morning showers, as
outlined by the CAMs as the leeward side of the trough axis/low
pressure pushes east into the Gulf of Maine. A much drier column of
air moves in behind the departing shortwave, leading to clearing
skies. The biggest headline for Wednesday will be gusty winds, with
a 925mb LLJ of 25 to 35 kt persists over the region. Winds should
peak during the morning hours when the jet is strongest, subsiding
slightly through the day as westerly flow develops.

Unsettled weather returns Thursday through the end of the period.
While flow will be primarily zonal, several low pressure systems or
shortwave features will swing near to or through southern New
England over the coming days. The most robust, and therefore highest
confidence precipitation event on the horizon comes Thursday
afternoon and evening as a rather strong Summer low, of 998mb, moves
across southern Canada. The shortwave energy defined by the low's
passage appears to be greatest as a cold front swings through;
though, this front will bring little relief from muggy dewpoints in
the 60s. While this frontal passage/shortwave displays healthy
severe weather characteristics, including PWATs surging towards 2"
and Bulk shear values approaching 60kt, both instability (~200-400
J/KG) and mid level lapse rates (~5.5C/km) are dismal, leading to
the conclusion that a widespread thunderstorm activity is unlikely;
though heavy downpours are possible. The one exception to
thunderstorm coverage and intensity may be across SE MA and the
south Coast, where a strong LLJ develops between 18 Thursday-00Z
Friday, MLLR approach 7C/km, and instability manages to muster up
about ~1000-1400 J/kg MUCAPE. Timing will again be critical as
instability will fall off quickly after sunset.

Friday appears to be a mainly dry day for southern New England as we
fall into a lull between shortwave features and very weak mid level
ridging develops.

Continued parade of weak shortwaves continues into the weekend,
though shower activity appears to be more scattered in nature
Saturday and Sunday. Dewpoints finally drop by Saturday morning,
leading to some early fall like temperatures, 50s across the
interior, to start the day. Summer lovers will be glad to hear that
even with the cool start to the day, temperature rebound into the
80s all weekend.

&&

.AVIATION /14Z TUESDAY THROUGH SATURDAY/...
Forecast Confidence Levels:

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

12Z Update...No major changes to the forecast, opt to con't a
TEMPO for TSRA at BOS and PVD 14/15 to 18/19 Zulu. Thunder
remains to our south over eastern Long Island, do believe with
day time heating areas of thunder will advect northward into RI
and eastern MA air space. Otherwise forecast remains on track.
See previous discussion below.

Today...Moderate Confidence

MVFR/IFR ceilings for this morning through early afternoon as
showers and thunderstorms overspread southern New England. Some
improvements to VFR will be possible after 15Z for the western
terminals and after 18Z for the eastern terminals. Another round
of showers and thunderstorms will be possible this afternoon and
evening, but confidence is low. If showers/storms redevelop
later today they should be more isolated to scattered as opposed
to the more widespread activity we're expecting for the first
half of the day.

Tonight...High confidence

Any evening showers/storms should taper off after 00Z. VFR
thereafter with 10 to 20 knot west/northwest winds.

Tomorrow... High confidence

VFR. 15 knot northwest winds with gusts from 25 to 30 knots
possible.

KBOS TAF...Moderate Confidence

Highest confidence for TSRA at BOS is between 12 and 16Z, but it
is possible an isolated shower or storm could develop and move
over the terminal between 09 and 12Z. Low confidence in this
outcome hence the VCSH for this time frame. Should see
improvements after 18Z with VFR conditions likely returning.
There is a low chance for another round of isolated to scattered
showers and thunderstorms by mid-afternoon/evening but
confidence was too low to mention in 06Z TAF.

KBDL TAF...Moderate confidence in TAF.

Highest confidence for TSRA at BDL is between 09 and 12Z. There
is shower activity near BDL at this hour and there is a low
chance that thunderstorm activity could develop prior to 09Z.
Should see substantial improvements by early afternoon. Another
round of isolated showers and storms may be possible by mid-
afternoon/evening, but confidence is low at this time as the
outcome will rely heavily on how things unfold this morning.

Outlook /Wednesday Night through Saturday/...

Wednesday Night: VFR. Breezy.

Thursday through Thursday Night: Mainly VFR, with local MVFR
possible. Breezy. Chance SHRA, isolated TSRA.

Friday: VFR. Breezy.

Friday Night through Saturday: VFR.

&&

.MARINE...
Forecaster Confidence Levels:

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

Today

Gusty southeast winds ahead of a warm front become southwest as
the warm front lifts north and east. Gusts up to 30 knots
possible over the outer waters. SCY remains in effect. Showers
and thunderstorms expected over the coastal waters this morning
with waterspouts possible!

A rip current statement is in effect for Tue. While it will be
far from an ideal beach day, this statement was issued to
address the potential for rip currents on southern and
southeast-facing beaches.

Tonight and Tomorrow

Unsettled weathers diminishes overnight as a cold front exits
east of the coastal waters. Gusty west/northwest winds develop
behind the front. 15 to 20 knot sustained winds tonight and
tomorrow with gusts up to 30 knots possible. Seas from 5 to 7
feet over the outer waters.

Outlook /Wednesday Night through Saturday/...

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

Thursday: Winds less than 25 kt. Chance of rain showers.

Thursday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of seas approaching 5 ft. Chance of
rain showers, isolated thunderstorms.

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

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

Saturday: Winds less than 25 kt.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...Flood Watch through this evening for MAZ004>007-012>021-026.
     High Risk for Rip Currents until 6 PM EDT this evening for MAZ007-
     020>024.
RI...Flood Watch through this evening for RIZ001>005-007.
     High Risk for Rip Currents until 6 PM EDT this evening for
     RIZ006>008.
MARINE...Small Craft Advisory until 8 PM EDT this evening for
     ANZ231>235-237.
     Small Craft Advisory until 8 AM EDT Wednesday for ANZ250-
     254>256.
     Small Craft Advisory until 2 PM EDT this afternoon for ANZ251.

&&

SYNOPSIS...Dooley/RM
NEAR TERM...Dooley/RM/Nash
SHORT TERM...RM
LONG TERM...Dooley/KS
AVIATION...Dooley/RM
MARINE...Dooley/RM

Hazardous Weather Outlook
National Weather Service Boston/Norton MA
410 AM EDT Tue Aug 8 2023

MAZ004>006-012>019-026-RIZ001>005-090815-
Northern Worcester MA-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-Eastern Plymouth MA-Northern Middlesex MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-Bristol RI-
410 AM EDT Tue Aug 8 2023

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...

This Hazardous Weather Outlook is for 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.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

CTZ002>004-MAZ002-003-008>011-090815-
Hartford CT-Tolland CT-Windham CT-Western Franklin MA-
Eastern Franklin MA-Western Hampshire MA-Western Hampden MA-
Eastern Hampshire MA-Eastern Hampden MA-
410 AM EDT Tue Aug 8 2023

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

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ007-020-021-RIZ007-090815-
Eastern Essex MA-Southern Bristol MA-Southern Plymouth MA-Newport RI-
410 AM EDT Tue Aug 8 2023

...FLOOD WATCH IN EFFECT THROUGH THIS EVENING...
...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS AFTERNOON...

This Hazardous Weather Outlook is for northeastern Massachusetts,
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 Rip Current Risk.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ022>024-RIZ006-008-090815-
Barnstable MA-Dukes MA-Nantucket MA-Washington RI-Block Island RI-
410 AM EDT Tue Aug 8 2023

...HIGH RIP CURRENT RISK IN EFFECT THROUGH THIS AFTERNOON...

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.

   High Rip Current Risk.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-090815-
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-
410 AM EDT Tue Aug 8 2023

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...Wednesday through Monday.

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/NWSBoston

You can follow us on Twitter at
@NWSBoston

Special Weather Statement
National Weather Service Boston/Norton MA
809 AM EDT Tue Aug 8 2023

MAZ005>007-014-081315-
Eastern Essex MA-Central Middlesex County MA-Western Essex MA-
Southeast Middlesex MA-
809 AM EDT Tue Aug 8 2023

...A shower with gusty winds and possible funnel cloud moving across
portions of northwestern Essex and northeastern Middlesex Counties
through 915 AM EDT...

At 809 AM EDT, Doppler radar was tracking a strong thunderstorm over
Sudbury, or near Framingham, moving northeast at 25 mph.

HAZARD...Winds in excess of 40 mph and possible funnel cloud.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Lowell, Lawrence, Haverhill, Waltham, Methuen, Billerica, Woburn,
Chelmsford, Andover, Lexington, Dracut, Tewksbury, North Andover,
Reading, Burlington, Wilmington, Westford, Acton, Concord, and
Sudbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

&&

LAT...LON 4281 7107 4272 7089 4233 7135 4239 7148
      4270 7131 4270 7129 4274 7124 4274 7118
      4279 7118 4281 7116 4282 7113
TIME...MOT...LOC 1208Z 213DEG 23KT 4240 7140

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

BL

Special Weather Statement
National Weather Service Boston/Norton MA
905 AM EDT Tue Aug 8 2023

MAZ020-RIZ003>007-081400-
Southern Bristol MA-Bristol RI-Washington RI-Eastern Kent RI-
Western Kent RI-Newport RI-
905 AM EDT Tue Aug 8 2023

...A strong thunderstorm will impact portions of south central
Bristol, Washington, Newport, southeastern Kent and Bristol Counties
through 1000 AM EDT...

At 905 AM EDT, Doppler radar was tracking a strong thunderstorm over
Charlestown, or 7 miles west of South Kingstown, moving northeast at
30 mph.

HAZARD...Wind gusts up to 50 mph.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Fall River, Warwick, Dartmouth, South Kingstown, North Kingstown,
Newport, Bristol, Westerly, Somerset, Portsmouth, Barrington,
Middletown, Narragansett, Swansea, Tiverton, Westport, East
Greenwich, Warren, Hopkinton, and Charlestown.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

Do not drive through flooded roads or underpasses. Avoid low lying
areas near small streams.

&&

LAT...LON 4151 7179 4176 7129 4171 7121 4174 7119
      4171 7117 4175 7113 4168 7119 4150 7112
      4151 7109 4153 7110 4153 7106 4158 7107
      4153 7105 4155 7101 4152 7104 4153 7096
      4133 7181
TIME...MOT...LOC 1305Z 235DEG 28KT 4141 7169

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH

BL

Special Weather Statement
National Weather Service Boston/Norton MA
929 AM EDT Tue Aug 8 2023

MAZ005>007-014-015-081430-
Eastern Essex MA-Suffolk MA-Central Middlesex County MA-
Western Essex MA-Southeast Middlesex MA-
929 AM EDT Tue Aug 8 2023

...A developing thunderstorm will impact portions of Essex,
northeastern Suffolk and east central Middlesex Counties through
1030 AM EDT...

At 928 AM EDT, Doppler radar was tracking a developing thunderstorm
over Middleton, or near North Andover, moving north at 35 mph.

HAZARD...Winds in excess of 40 mph. Broad rotation was noted with
         this storm and may produce funnel clouds.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Lynn, Lawrence, Haverhill, Malden, Medford, Revere, Peabody, Methuen,
Salem, Beverly, Woburn, Andover, Lexington, Tewksbury, North Andover,
Melrose, Saugus, Danvers, Wakefield, and Reading.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

&&

LAT...LON 4286 7085 4287 7082 4283 7081 4281 7087
      4280 7083 4282 7082 4280 7081 4279 7076
      4241 7096 4246 7124 4281 7110 4281 7107
      4286 7103 4287 7097 4289 7093 4289 7090
TIME...MOT...LOC 1328Z 199DEG 30KT 4261 7105

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Loconto

Preliminary Local Storm Report
National Weather Service Boston/Norton MA
950 AM EDT Tue Aug 8 2023

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

0930 AM     Flood            2 NW Grafton            42.23N 71.71W
08/08/2023                   Worcester          MA   Dept of Highways

            MassDOT reported Rt 20 briefly closed in
            both directions.

&&

Special Weather Statement
National Weather Service Boston/Norton MA
1001 AM EDT Tue Aug 8 2023

MAZ005>007-013>016-018-019-081445-
Eastern Essex MA-Eastern Plymouth MA-Suffolk MA-Western Norfolk MA-
Central Middlesex County MA-Eastern Norfolk MA-Western Plymouth MA-
Western Essex MA-Southeast Middlesex MA-
1001 AM EDT Tue Aug 8 2023

...Developing thunderstorms will impact portions of Essex, Norfolk,
Suffolk, eastern Middlesex and northwestern Plymouth Counties
through 1045 AM EDT...

At 1000 AM EDT, Doppler radar was tracking developing thunderstorms
along a line extending from near Carlisle to Norfolk. Movement was
northeast at 40 mph.

HAZARD...Winds in excess of 40 mph. Broad rotation has been seen on
         radar and could result in funnel clouds.

SOURCE...Radar indicated.

IMPACT...Strong winds could cause minor damage such as downed
         branches.

Locations impacted include...
Boston, Lowell, Cambridge, Brockton, Quincy, Lynn, Newton, Lawrence,
Somerville, Framingham, Haverhill, Waltham, Malden, Brookline,
Medford, Weymouth, Revere, Peabody, Methuen, and Arlington.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when you hear thunder. Do not resume outdoor activities
until at least 30 minutes after the storm has passed.

These storms may intensify and become severe. Stay tuned to your
local media for updates and possible warnings.

&&

LAT...LON 4283 7081 4281 7087 4280 7083 4282 7082
      4279 7080 4249 7078 4238 7095 4229 7077
      4218 7076 4202 7136 4258 7144 4287 7086
      4287 7082
TIME...MOT...LOC 1400Z 237DEG 33KT 4252 7141 4211 7131

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH

Loconto

Preliminary Local Storm Report
National Weather Service Boston/Norton MA
1034 AM EDT Tue Aug 8 2023

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

0955 AM     Flood            2 E Hudson              42.39N 71.52W
08/08/2023                   Middlesex          MA   Law Enforcement

            intersection of Main and Chestnut flooded.
            relayed by amateur radio.

1005 AM     Flood            2 WSW Hopkinton         42.21N 71.55W
08/08/2023                   Middlesex          MA   Law Enforcement

            West Main St near I-495 ramp flooded.
            Relayed by amateur radio.

1015 AM     Flood            2 WSW Marlborough       42.34N 71.58W
08/08/2023                   Middlesex          MA   Law Enforcement

            Glen St and Ripley Ave flooded. relayed by
            amateur radio.

1020 AM     Flood            2 SSE Framingham        42.28N 71.42W
08/08/2023                   Middlesex          MA   Law Enforcement

            parts of Henry St flooded. relayed by
            amateur radio.

1025 AM     Flood            2 WNW Wilmington        42.57N 71.21W
08/08/2023                   Middlesex          MA   Law Enforcement

            parts of Nichols St flooded. relayed by
            amateur radio.

&&

Nash