Low pressure and its associated cold front swept across the region before sunrise, bringing an end to rain showers. This was followed by dry but windy conditions which caused scattered damage across Southern New England.
Every event with a place to put it; 10 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
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.
The episode as NWS BOX wrote it up.
Low pressure and its associated cold front swept across the region before sunrise, bringing an end to rain showers. This was followed by dry but windy conditions which caused scattered damage across Southern New England.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Boston/Norton, MA wrote its last area forecast discussion before the first event at Apr 30, 9:37 AM EST, 2 hours 23 minutes earlier.
Area Forecast Discussion
National Weather Service Boston/Norton MA
1037 AM EDT Fri Apr 30 2021
.SYNOPSIS...
In the wake of low pressure that has moved through the region
last night, expect mainly dry but windy weather today. Cooler
weather tonight along with gusty winds and scattered rain/snow
showers. Dry and seasonable weather returns Saturday along with
less wind. Milder temperatures return by Sunday and may linger
into Monday. Then potentially turning unsettled with the risk of
showers Monday night into mid week.
&&
.NEAR TERM /UNTIL 6 PM THIS EVENING/...
1035 am update...
No substantial changes with the morning update, primarily folded
in the latest observations. Quick look at latest observations
are showing that boundary layer mixing is starting to tap into
the stronger winds aloft, with several locations touching 40 mph
in the last hour. Per latest hi-res guidance, it still looks
like this afternoon into early evening will see the highest
potential of strong wind gusts of 50 mph or so. Though with
temperatures aloft cooling and setting up some "self
destructive" sunshine giving us shallow cu/strato-cu, it's
possible the cloud cover will hold back surface temperatures
just a bit that keeps the boundary layer mixing just a little
less than what guidance suggests. Really nuanced sort of stuff
as the bottom line is it will be windy today.
7 AM UPDATE...
Forecast remains largely on track so only made minor changes to
bring near-term forecast in line with current obs. 988mb surface
low is currently over Gulf of Maine and will continue to deepen
as it moves into the Canadian Maritimes. Last batch of showers
is clipping Nantucket and the Outer Cape and will move offshore
shortly. As winds turn northwesterly, radar reflectivity shows
lake-effect showers developing downwind of Lake Erie and
Ontario. Visible satellite is showing pockets of partial
clearing across the region. But the cold air is still well to
our west. In fact, the -32C H5 cold pool is currently located
over Lake Superior but will move east. As it does so, mid to low
level lapse rates will steepen and bring down the much strong
gusts. You can read the rest of the discussion below.
PREVIOUS DISCUSSION...
Highlights...
* Mild and dry today but becoming windy with west winds 40-50 mph
Short wave trough and attending surface wave exit the area before
12z, followed by post frontal airmass overspreading the region.
Thus, any leftover showers at sunrise quickly move offshore and
gives way to developing sunshine. Although cooling temps aloft (-22C
at H5) combined with cyclonic flow will result in SCT-BKN post
frontal CU/SCU. Best chance for any diurnal showers today is likely
in Western MA, where upslope flow over the Berkshires likely yields
some showers there.
Core of the cold air is delayed until Fri night, so
looking at mild day given a warm start to the day and 850 mb temps
around +4C at 18z, combined with downsloping NW winds in a well
mixed boundary layer, should supports highs of 65-70. Although it
will feel a bit cooler given increasing winds during the day. This
is in response to the surface wave exiting Cape Ann early this
morning, deepens to a sub 980 mb low over Nova Scotia. This tight
pressure gradient coupled with strong late April sunshine and CAA,
will yield a well mixed boundary layer supporting gusts 40-50 mph.
Hence, wind advisory remains posted.
&&
.SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SATURDAY/...
2 AM update...
Highlights...
* Westerly wind gusts of 40-50 mph continue this evening
* Period of showers tonight with snow showers Worcester Hills, NE CT
into RI
Potent trailing short wave moves across the region tonight with
-30C air at 500 mb! Sufficient deep layer moisture and lift for this
instability to be realized in the form of widespread showers
overnight. As cold air aloft overspreads the region, rain showers
may mix with or change to snow showers across CT/Western-Central MA
into RI, as cold air arrives from the west. Not expecting any
accumulations, just an interesting way to close out the last day of
April.
Temps should generally be above freezing, so not expecting any real
accumulations. But perhaps a coating to 1 inch of snow may occur in
the highest terrain...mainly at or above 1500 feet. Ptype in the
lower elevations should mainly be rain showers, but low risk that a
few wet snow flakes mix in for a short time.
Precipitation should come to an end toward daybreak as the the
shortwave departs. Strongest winds will likely be Friday evening
given this is the time when cold air advection will peak, yielding
steepest low level lapse rates. Gusts up to 40-50 mph are likely and
thus the wind advisory remains in effect thru Fri evening. Low temps
will be in the 30s to near 40.
Saturday...
Turning the calendar to May 1st, it will be a cool and blustery
start to the day, but rising heights and warming temps aloft
supports a pleasant afternoon. Expecting sunshine, diminishing wind
and seasonably mild temperatures, a very pleasant afternoon.
&&
.LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/...
* Warming trend begins late Saturday and continues into early next
week.
* Turning cooler mid to late week with potential for unsettled
weather but forecast confidence is low this far out.
Saturday night into Sunday...
H5 ridging is disrupted by a potent 510 Dm closed low that dives
southwards from Hudson Bay towards Quebec and then New Brunswick.
This pushes a cold front towards our region (although it doesn't
quite clear our area till later in the day), bringing the chance for
a few showers around though most of the day should be dry given mean
ridging. Another thing of note is that gusty winds are likely to
return early Sunday as 925 mb winds peak between 45 and 55 kts,
especially over the south coast and Islands. Given good mixing, 30
to 35 mph gusts are possible at times. There remains some
uncertainty with how warm Sunday can get, given the spread in 850mb
temperature guidance, which ranges from between +5C and +7C in
GFS/NAM/GEM to between +9C and +11C in the EC. Given a strong
westerly flow and at least partial sunshine, good confidence in
highs reaching low to mid 70s on Sunday except for 60s Cape and the
Islands.
Sunday night into Monday...
By Sunday night, the aforementioned cold front finally clears our
area but looks to lift north again as a warm front on Monday as an
upper-level shortwave and surface low tracks from the Missouri
Valley to the Upper Great Lakes. The atmosphere looks to be starved
of both instability and moisture, so much of Monday should again
feature mainly dry conditions although with plenty of cloud cover,
which would keep temperatures in check in the 60s and 70s.
Monday night into Thursday...
From Monday night onwards, the overall weather pattern gets
increasingly unsettled. We get into a zonal flow with embedded
shortwaves giving us chance of rain daily. A stronger cold front
finally clears our area in the Wednesday into Thursday time frame so
Thursday looks like the driest day in the long term forecast.
Ridging looks to break down late week as a series of shortwave
begins the transition to a deeper trough. This development means
that we are less likely to see any prolonged warmth till the middle
of May. This is consistent with a negative NAO regime and CPC's 6-10
day outlook of below normal temperatures. We do have an active
weather pattern, however, that could allow us to chip away at the
rainfall deficit this spring.
&&
.AVIATION /14Z FRIDAY THROUGH TUESDAY/...
Forecaster Confidence Levels.
Low - less than 30 percent.
Moderate - 30 to 60 percent.
High - greater than 60 percent.
06z update...
Today...high confidence on trends, some uncertainty on exact
timing of improving conditions.
Low pressure currently over Northeast CT will continue moving
east and will be offshore by 12z. Conditions improve rapidly
with the wind shift to the WNW. Dry weather after sunrise but
increasing WNW winds with gusts up to 35-45 kt at times.
Tonight...high confidence.
Strong NW winds continue with gusts up to 35-45kt at times. MVFR
in rain showers, snow showers across CT into Western-Central MA
and RI, especially the hilly terrain.
Saturday...high confidence.
VFR and dry weather with gusty NW winds in the morning, then
diminishing in the afternoon and becoming west.
KBOS TAF...High Confidence in TAF trends, with improving
conditions around 12z and thereafter, as winds shift to the WNW
but become strong as the day progresses, with gusts up to 40 kt
or so at times into this evening.
KBDL TAF...High Confidence in TAF trends, with improving
conditions around 08z and thereafter, as winds shift to WNW.
Winds become strong as the day progresses with gusts up to 40 kt
or so at times into this evening.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Mainly VFR, with local MVFR possible. Windy
with local gusts up to 30 kt. Slight chance RA.
Sunday: Mainly VFR, with local MVFR possible. Windy with areas
of gusts up to 30 kt. Slight chance RA.
Sunday Night: Mainly VFR, with local MVFR possible. Breezy.
Slight chance RA.
Monday: Mainly MVFR, with areas VFR possible. Chance RA.
Monday Night: Mainly MVFR, with local IFR possible. Breezy.
Chance RA.
Tuesday: Mainly MVFR, with areas IFR possible. Breezy. Chance
RA.
&&
.MARINE...
Highlights...
* Gale Warnings this afternoon and night
Today...low pressure emerges off Cape Ann before daybreak and tracks
northeast into Nova Scotia this afternoon, intensifying into a gale
center with a sub 980 mb low center. Strongest NW winds will be near
shore with gusts up to 35-45 kt, not as strong offshore given cooler
ocean vs warmer land temps. Dry weather and offshore winds will
support good vsby to the horizon.
Tonight...intense low pressure over the Maritimes and high pressure
over TN Valley will continue to support NW gales with gusts up to 35-
45 kt. A period of rain showers will lower vsby at times.
Saturday...intense Maritime low finally exits into the North
Atlantic and high pressure builds south of New England. This will
support diminishing winds and shifting from NW to W. Dry weather and
offshore winds will provide good vsby to the horizon.
Outlook /Saturday Night through Tuesday/...
Saturday Night: Low risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of rough seas. Slight chance of rain.
Sunday: Moderate risk for Small Craft Advisory winds with gusts
up to 30 kt. Areas of rough seas.
Sunday Night: Winds less than 25 kt. Local rough seas.
Monday: Winds less than 25 kt. Seas up to 5 ft. Slight chance
of rain.
Monday Night: Low risk for Small Craft Advisory winds with
gusts up to 25 kt. Seas up to 5 ft. Chance of rain.
Tuesday: Winds less than 25 kt. Areas of seas approaching 5 ft.
Chance of rain.
&&
.BOX WATCHES/WARNINGS/ADVISORIES...
CT...Wind Advisory until 2 AM EDT Saturday for CTZ002>004.
MA...Wind Advisory until 2 AM EDT Saturday for MAZ002>024-026.
RI...Wind Advisory until 2 AM EDT Saturday for RIZ001>008.
MARINE...Gale Warning until 4 AM EDT Saturday for ANZ231>235-237-251.
Gale Warning until 11 PM EDT this evening for ANZ230-236.
Gale Warning until 6 AM EDT Saturday for ANZ250-254>256.
&&
SYNOPSIS...Nocera/Chai
NEAR TERM...Nocera/Chai/Nash
SHORT TERM...Nocera
LONG TERM...Chai
AVIATION...Nocera/Chai
MARINE...Nocera/ChaiHazardous Weather Outlook National Weather Service Boston/Norton MA 824 AM EDT Fri Apr 30 2021 CTZ002>004-MAZ002>024-026-RIZ001>008-011230- 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- 824 AM EDT Fri Apr 30 2021 ...WIND ADVISORY IN EFFECT FROM NOON TODAY TO 2 AM EDT SATURDAY... This Hazardous Weather Outlook is for northern Connecticut, all of Massachusetts east of Berkshire County, and Rhode Island. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Wind Advisory. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ250-254>256-011230- 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- Coastal Waters from Montauk NY to Marthas Vineyard extending out to 20 nm South of Block Island- 824 AM EDT Fri Apr 30 2021 ...GALE WARNING IN EFFECT FROM NOON TODAY TO 6 AM EDT 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. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ231>235-237-251-011230- Cape Cod Bay-Nantucket Sound-Vineyard Sound-Buzzards Bay- Rhode Island Sound-Block Island Sound- Massachusetts Bay and Ipswich Bay- 824 AM EDT Fri Apr 30 2021 ...GALE WARNING IN EFFECT FROM NOON TODAY TO 4 AM EDT 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. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. ANZ230-236-011230- Boston Harbor-Narragansett Bay- 824 AM EDT Fri Apr 30 2021 ...GALE WARNING IN EFFECT FROM NOON TODAY TO 11 PM EDT THIS EVENING... This Hazardous Weather Outlook is for Massachusetts coastal waters and Rhode Island coastal waters. .DAY ONE...Today and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. 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
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
802 AM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 AM HEAVY RAIN 3 WNW CHARLEMONT 42.65N 72.94W
04/30/2021 M1.33 INCH FRANKLIN MA CO-OP OBSERVER
&&
TGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
842 AM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0600 AM HEAVY RAIN 2 W LOWELL 42.64N 71.36W
04/30/2021 M3.71 INCH MIDDLESEX MA CO-OP OBSERVER
CO-OP OBSERVER STATION LLLM3 LOWELL.
0700 AM HEAVY RAIN MIDDLETON 42.59N 71.02W
04/30/2021 M3.25 INCH ESSEX MA CO-OP OBSERVER
CO-OP OBSERVER STATION MIDM3 MIDDLETON.
0700 AM HEAVY RAIN 1 SW ASHBURNHAM 42.62N 71.92W
04/30/2021 M2.63 INCH WORCESTER MA CO-OP OBSERVER
CO-OP OBSERVER STATION ASBM3 ASHBURNHAM.
0700 AM HEAVY RAIN 2 SE SUNDERLAND 42.44N 72.55W
04/30/2021 M2.33 INCH FRANKLIN MA CO-OP OBSERVER
CO-OP OBSERVER STATION SDLM3 SUNDERLAND.
0715 AM HEAVY RAIN 1 NW AMHERST 42.39N 72.54W
04/30/2021 M1.65 INCH HAMPSHIRE MA CO-OP OBSERVER
CO-OP OBSERVER STATION AHRM3 AMHERST.
0700 AM HEAVY RAIN 3 WNW CHARLEMONT 42.65N 72.94W
04/30/2021 M1.33 INCH FRANKLIN MA CO-OP OBSERVER
0700 AM HEAVY RAIN 2 SSE TOPSFIELD 42.61N 70.94W
04/30/2021 M3.49 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-71 DANVERS 2.5 NNE.
0700 AM HEAVY RAIN 2 WSW ANDOVER 42.65N 71.17W
04/30/2021 M3.35 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-10 ANDOVER 1.5 W.
0500 AM HEAVY RAIN 1 E ANDOVER 42.66N 71.13W
04/30/2021 M3.25 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-48 ANDOVER 0.6 E.
0700 AM HEAVY RAIN 1 E ROCKPORT 42.64N 70.60W
04/30/2021 M3.21 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-22 ROCKPORT 1.0 E.
0700 AM HEAVY RAIN 1 SE PEPPERELL 42.66N 71.58W
04/30/2021 M2.80 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-168 PEPPERELL 0.6 SE.
0630 AM HEAVY RAIN 2 W TOWNSEND 42.68N 71.75W
04/30/2021 M2.71 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-47 WEST TOWNSEND 0.5
W.
0600 AM HEAVY RAIN 3 NW TOWNSEND 42.70N 71.75W
04/30/2021 M2.54 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-4 TOWNSEND 3.2 NW.
0715 AM HEAVY RAIN 2 SSW PEPPERELL 42.64N 71.61W
04/30/2021 M2.49 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-169 PEPPERELL 2.1
SSW.
0700 AM HEAVY RAIN 1 SE SUNDERLAND 42.45N 72.57W
04/30/2021 M2.34 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-12 SUNDERLAND 1.3 SE.
0700 AM HEAVY RAIN 3 ENE PRINCETON 42.48N 71.81W
04/30/2021 M2.30 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-56 STERLING 4.3 NW.
0600 AM HEAVY RAIN 1 WSW WILLIAMSBURG 42.39N 72.74W
04/30/2021 M2.22 INCH HAMPSHIRE MA COCORAHS
COCORAHS STATION MA-HS-8 WILLIAMSBURG 1.2
WSW.
0655 AM HEAVY RAIN 3 NNW LITTLETON 42.57N 71.50W
04/30/2021 M2.18 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-104 LITTLETON 2.8
NNW.
0652 AM HEAVY RAIN 1 NE LUNENBURG 42.60N 71.72W
04/30/2021 M2.16 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-58 LUNENBURG 0.6 NE.
0700 AM HEAVY RAIN WESTHAMPTON 42.30N 72.77W
04/30/2021 M2.16 INCH HAMPSHIRE MA COCORAHS
COCORAHS STATION MA-HS-45 WESTHAMPTON 0.4
WNW.
0700 AM HEAVY RAIN 1 E CONWAY 42.52N 72.66W
04/30/2021 M2.15 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-46 CONWAY 1.2 E.
0700 AM HEAVY RAIN 1 WSW LITTLETON 42.53N 71.49W
04/30/2021 M2.15 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-105 LITTLETON 0.9
WSW.
0545 AM HEAVY RAIN AYER 42.56N 71.59W
04/30/2021 M2.04 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-25 AYER 0.1 SW.
0700 AM HEAVY RAIN 1 S GROVELAND 42.74N 71.03W
04/30/2021 M1.95 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-55 GROVELAND 0.8 S.
0630 AM HEAVY RAIN 4 ENE GOSHEN 42.46N 72.74W
04/30/2021 M1.94 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-43 CONWAY 5.0 SSW.
0530 AM HEAVY RAIN AYER 42.56N 71.58W
04/30/2021 M1.93 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-192 AYER.
0630 AM HEAVY RAIN 1 ENE GEORGETOWN 42.74N 70.96W
04/30/2021 M1.91 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-46 GEORGETOWN 1.3
ENE.
0700 AM HEAVY RAIN 1 SW ACTON 42.47N 71.48W
04/30/2021 M1.91 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-12 ACTON 1.3 SW.
0700 AM HEAVY RAIN 1 SW ACTON 42.48N 71.47W
04/30/2021 M1.91 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-166 ACTON 0.5 SW.
0609 AM HEAVY RAIN 3 SW CARLISLE 42.50N 71.39W
04/30/2021 M1.86 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-53 ACTON 4.0 ENE.
0600 AM HEAVY RAIN 2 SSE NEWBURY 42.77N 70.99W
04/30/2021 M1.85 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-19 WEST NEWBURY 1.8
SSE.
0700 AM HEAVY RAIN 2 S HARVARD 42.47N 71.58W
04/30/2021 M1.84 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-55 HARVARD 2.1 S.
0650 AM HEAVY RAIN 1 E EASTHAMPTON 42.27N 72.66W
04/30/2021 M1.82 INCH HAMPSHIRE MA COCORAHS
COCORAHS STATION MA-HS-48 EASTHAMPTON 1.0 E.
0700 AM HEAVY RAIN LEXINGTON 42.45N 71.23W
04/30/2021 M1.81 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-96 LEXINGTON 0.3 NE.
0615 AM HEAVY RAIN NORTHAMPTON 42.32N 72.67W
04/30/2021 M1.76 INCH HAMPSHIRE MA COCORAHS
COCORAHS STATION MA-HS-12 NORTHAMPTON 0.4 S.
0630 AM HEAVY RAIN 1 ESE NORTHAMPTON 42.32N 72.66W
04/30/2021 M1.69 INCH HAMPSHIRE MA COCORAHS
COCORAHS STATION MA-HS-21 NORTHAMPTON 0.6
ESE.
0630 AM HEAVY RAIN 1 WSW WESTMINSTER 42.55N 71.91W
04/30/2021 M1.66 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-44 WESTMINSTER 0.6
WSW.
0630 AM HEAVY RAIN 3 NNE MONTAGUE 42.58N 72.50W
04/30/2021 M1.58 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-21 MILLERS FALLS 0.2
SW.
0600 AM HEAVY RAIN 3 S WINCHENDON 42.64N 72.04W
04/30/2021 M1.56 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-80 WINCHENDON 3.2 S.
0700 AM HEAVY RAIN MELROSE 42.46N 71.05W
04/30/2021 M1.56 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-126 MELROSE 0.5 NE.
0700 AM HEAVY RAIN 1 N HAVERHILL 42.79N 71.09W
04/30/2021 M1.51 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-20 HAVERHILL 0.7 N.
0700 AM HEAVY RAIN 2 NW LOWELL 42.66N 71.35W
04/30/2021 M1.50 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-187 DRACUT 2.4 W.
0700 AM HEAVY RAIN 1 ESE MAYNARD 42.42N 71.44W
04/30/2021 M1.48 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-51 MAYNARD 0.7 ESE.
0700 AM HEAVY RAIN 1 N NEWBURYPORT 42.82N 70.89W
04/30/2021 M1.47 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-70 NEWBURYPORT 0.6 N.
0700 AM HEAVY RAIN 2 WNW PELHAM 42.42N 72.43W
04/30/2021 M1.46 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-38 SHUTESBURY 2.9 SW.
0700 AM HEAVY RAIN 1 N HUDSON 42.41N 71.56W
04/30/2021 M1.46 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-86 HUDSON 1.0 N.
0700 AM HEAVY RAIN 1 NW HUDSON 42.40N 71.59W
04/30/2021 M1.44 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-115 HUDSON 1.4 NW.
0700 AM HEAVY RAIN 1 SW LEXINGTON 42.44N 71.24W
04/30/2021 M1.41 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-52 LEXINGTON 0.6 SW.
0700 AM HEAVY RAIN 1 NW HUDSON 42.40N 71.57W
04/30/2021 M1.32 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-179 HUDSON 0.7 NW.
0700 AM HEAVY RAIN NEWBURYPORT 42.82N 70.89W
04/30/2021 M1.28 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-64 NEWBURYPORT 0.4
NNW.
0700 AM HEAVY RAIN 1 NNE BARRE 42.44N 72.10W
04/30/2021 M1.27 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-54 BARRE 1.4 NNE.
0715 AM HEAVY RAIN 2 S BERLIN 42.35N 71.63W
04/30/2021 M1.27 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-77 BERLIN 2.0 S.
0700 AM HEAVY RAIN 3 ESE GREENFIELD 42.58N 72.55W
04/30/2021 M1.26 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-36 MONTAGUE 3.4 NNW.
0600 PM HEAVY RAIN 2 SSW LUNENBURG 42.57N 71.74W
04/29/2021 M1.25 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-96 LEOMINSTER 3.6
NNE.
0500 AM HEAVY RAIN 1 W MEDFORD 42.42N 71.13W
04/30/2021 M1.25 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-44 MEDFORD 1.2 W.
0700 AM HEAVY RAIN 1 SW BERNARDSTON 42.66N 72.56W
04/30/2021 M1.24 INCH FRANKLIN MA COCORAHS
COCORAHS STATION MA-FR-35 BERNARDSTON 1.0
SW.
0700 AM HEAVY RAIN 3 WNW PAXTON 42.33N 71.99W
04/30/2021 M1.20 INCH WORCESTER MA COCORAHS
COCORAHS STATION MA-WR-63 RUTLAND 3.1 SW.
0700 AM HEAVY RAIN 2 SSW WESTFIELD 42.12N 72.77W
04/30/2021 M1.18 INCH HAMPDEN MA COCORAHS
COCORAHS STATION MA-HD-31 WESTFIELD 1.6 SSW.
0629 AM HEAVY RAIN NAHANT 42.42N 70.92W
04/30/2021 M1.17 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-45 NAHANT 0.4 N.
0700 AM HEAVY RAIN 4 W SUDBURY 42.36N 71.47W
04/30/2021 M1.12 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-89 SUDBURY 3.6 W.
0600 AM HEAVY RAIN 1 N AMESBURY 42.87N 70.93W
04/30/2021 M1.05 INCH ESSEX MA COCORAHS
COCORAHS STATION MA-ES-59 AMESBURY 1.2 N.
0700 AM HEAVY RAIN 1 WNW ARLINGTON 42.43N 71.18W
04/30/2021 M1.00 INCH MIDDLESEX MA COCORAHS
COCORAHS STATION MA-MD-183 ARLINGTON 0.8
WNW.
0730 AM HEAVY RAIN 2 WNW GLOUCESTER 42.63N 70.68W
04/30/2021 M4.00 INCH ESSEX MA MESONET
MESONET STATION EW5327 GLOUCESTER.
0730 AM HEAVY RAIN 1 SW TOPSFIELD 42.63N 70.97W
04/30/2021 M3.56 INCH ESSEX MA MESONET
MESONET STATION EW5193 TOPSFIELD.
0728 AM HEAVY RAIN 1 WNW METHUEN 42.73N 71.20W
04/30/2021 M3.30 INCH ESSEX MA MESONET
MESONET STATION CW3868 METHUEN.
0725 AM HEAVY RAIN 2 SSE LOWELL 42.61N 71.31W
04/30/2021 M3.23 INCH MIDDLESEX MA MESONET
MESONET STATION EW8958 CHELMSFORD.
0730 AM HEAVY RAIN 3 ENE TEWKSBURY 42.63N 71.19W
04/30/2021 M3.14 INCH ESSEX MA MESONET
MESONET STATION 6541D 2 ENE TEWKSBURY.
0732 AM HEAVY RAIN 1 W TEWKSBURY 42.61N 71.26W
04/30/2021 M2.98 INCH MIDDLESEX MA MESONET
MESONET STATION AT720 TEWKSBURY.
0725 AM HEAVY RAIN 1 ENE ROCKPORT 42.65N 70.60W
04/30/2021 M2.90 INCH ESSEX MA MESONET
MESONET STATION FW8727 ROCKPORT.
0730 AM HEAVY RAIN 1 NNW BEVERLY 42.58N 70.85W
04/30/2021 M2.90 INCH ESSEX MA MESONET
MESONET STATION 3227D 1 NNW BEVERLY.
0733 AM HEAVY RAIN 3 SSE LOWELL 42.60N 71.30W
04/30/2021 M2.77 INCH MIDDLESEX MA MESONET
MESONET STATION CW3053 TEWKSBURY.
0730 AM HEAVY RAIN 1 SE WENHAM 42.59N 70.87W
04/30/2021 M2.72 INCH ESSEX MA MESONET
MESONET STATION DW5181 BEVERLY.
0734 AM HEAVY RAIN 1 N MANCHESTER 42.58N 70.77W
04/30/2021 M2.69 INCH ESSEX MA MESONET
MESONET STATION MNCMH MANCHESTER.
0732 AM HEAVY RAIN 2 N CHELMSFORD 42.63N 71.37W
04/30/2021 M2.62 INCH MIDDLESEX MA MESONET
MESONET STATION AU740 NORTH CHELMSFORD.
0608 AM HEAVY RAIN 1 S BERNARDSTON 42.65N 72.55W
04/30/2021 M2.57 INCH FRANKLIN MA MESONET
MESONET STATION CW1227 BARRE.
0730 AM HEAVY RAIN 1 SW LOWELL 42.63N 71.34W
04/30/2021 M2.57 INCH MIDDLESEX MA MESONET
MESONET STATION CW3660 LOWELL.
0530 AM HEAVY RAIN 1 NNW ANDOVER 42.67N 71.15W
04/30/2021 M2.47 INCH ESSEX MA MESONET
MESONET STATION ANDM3 1.2 N ANDOVER.
0734 AM HEAVY RAIN 1 NNW LOWELL 42.66N 71.33W
04/30/2021 M2.44 INCH MIDDLESEX MA MESONET
MESONET STATION LWELL 1 NNW LOWELL.
0631 AM HEAVY RAIN 2 SSE ASHFIELD 42.50N 72.77W
04/30/2021 M2.39 INCH FRANKLIN MA MESONET
MESONET STATION FW3821 ASHFIELD.
0734 AM HEAVY RAIN 1 NE BEVERLY 42.57N 70.82W
04/30/2021 M2.37 INCH ESSEX MA MESONET
MESONET STATION BVSLY 1 ENE BEVERLY.
&&
GAUCHERPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
850 AM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0840 AM HEAVY RAIN 1 WNW CARLISLE 42.54N 71.37W
04/30/2021 M2.11 INCH MIDDLESEX MA TRAINED SPOTTER
&&
TGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
938 AM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0845 AM HEAVY RAIN 3 WSW HAVERHILL 42.77N 71.14W
04/30/2021 M2.00 INCH ESSEX MA TRAINED SPOTTER
&&
TGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1024 AM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 AM HEAVY RAIN 1 NNW MONSON 42.11N 72.32W
04/30/2021 M1.13 INCH HAMPDEN MA TRAINED SPOTTER
&&
TGPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BOSTON/NORTON MA
1032 AM EDT FRI APR 30 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1031 AM HEAVY RAIN 1 SE SAUGUS 42.45N 70.99W
04/30/2021 M1.85 INCH ESSEX MA TRAINED SPOTTER
&&
TGThe national radar mosaic for the moment the first event began.
10 strong wind. Local standard time, as filed.
Winds were generally gusting 40 to 50 mph. The highest gust was 53 mph at 125 PM EDT in Mattapoisett. In Acushnet, at 444 PM EDT trees and power lines were down on Main St.
Winds were generally gusting to 40 to 50 mph. The highest measured gust was 47 mph at 552 PM EDT at the Bedford Airport (KBED). In Hudson, at 636 PM EDT a tree fell on the corner of Blaine and Howe St. In Ashland, at 913 PM EDT a tree was down on wires.
Winds were generally gusting to 40 to 50 mph. The highest gust was 53 mph at 353 PM EDT in Cambridge, MA. In Malden, at 612 PM EDT an electric sign came down onto a car with four people inside. Two were transported by EMS.
Winds were generally gusting 40 to 50 mph. The highest measured gust was 55 mph at 513 PM EDT in Wrentham. In Foxboro at 426 PM EDT an oak tree fell on a house. In Franklin at 1241 PM EDT a large tree came down on a roof causing minor damage. In Canton at 114 PM EDT a pine tree came down in front of a home on Lakewood Dr.
Winds generally gusted to 45 to 55 mph. The highest measured gust was 56 mph in Mendon at 528 PM EDT. In Westborough, a tree came down on Adams St.
Winds were generally gusting to 40 to 50 mph. The highest measured gust was 51 mph at the Fitchburg Airport (KFIT) at 332 PM EDT. In Sterling wires were down on Parent Hill Rd. In Fitchburg at 500 PM EDT a large tree came down with one of the large branches landing on a house. In Barre at 210 PM EDT a tree and powerlines were down on Peach St. In Ashburnham at 500 PM EDT a tree was down in a yard.
Winds were generally gusting to 40 to 50 mph. In Goshen at 215 PM EDT a tree and wires were down on Hyde Hill Rd. In Williamsburg at 215 PM EDT a tree and wires were down on Depot Rd.
Winds were generally gusting to 40 to 50 mph. In Mansfield a telephone pole and powerlines came down on Highland St.
Winds were generally gusting to 40 to 50 mph. In Danvers at 741 PM EDT trees were down on wires on Forest St.
Winds were generally gusting to 40 to 50 mph. In Northampton there was a tree and wires down on Willow St.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Massachusetts in 2021Every state in 2021This day in weather historyWarnings in Massachusetts, April 2021
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: 949092, 949093, 949094, 949095, 949096, 949097, 949098, 949100, 949101, 949102.