Alert archive / Massachusetts / Special Weather Statements in 2017

Special Weather Statement, NWS Boston/Norton, MA

July 8, 2017Middlesex County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jul 8, 2017, 2:25 PM EDT for Middlesex County, Massachusetts. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Jul 8, 2017, 2:25 PM EDT (18:25 UTC)
Expired
Jul 8, 2017, 3:15 PM EDT
In force
50 min
Issued by
NWS Boston/Norton, MA

County Middlesex County, MA

The radar

The Boston radar (KBOX), 59 km from the middle of the area, began a volume at 18:27 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

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

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 6.4 hours before the alert went out and 135 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Chatham, MA at 12:00Z on 2017-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Chatham, MA at 12:00Z on 2017-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 53 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
3 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
646 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
53 m²/s²
0-3 km storm-relative helicity
73 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this special weather statement went out at Jul 8, 2:25 PM EDT, 0 minutes earlier.

Area forecast discussion, Jul 8, 2:25 PM EDT, 0 minutes before
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Hazardous weather outlook, Jul 8, 4:26 AM EDT, 9 hours 59 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
426 AM EDT Sat Jul 8 2017

CTZ002>004-MAZ002>024-026-RIZ001>008-090830-
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-
426 AM EDT Sat Jul 8 2017

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

.DAY ONE...Today and Tonight.

Some thunderstorms this afternoon and evening may contain strong or
damaging winds, hail and heavy downpours.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

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

ANZ230>237-250-251-254>256-090830-
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-
426 AM EDT Sat Jul 8 2017

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

.DAY ONE...Today and Tonight.

A few strong thunderstorms with gusty winds are possible this
afternoon and evening.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

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

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

You can follow us on Facebook at
www.facebook.com/NWSBoston

You can follow us on Twitter at
@NWSBoston

In the hours before

Special weather statement, Jul 8, 9:56 AM EDT, 4 hours 29 minutes before
Special Weather Statement
National Weather Service Taunton MA
956 AM EDT Sat Jul 8 2017

CTZ002>004-MAZ002>019-026-RIZ001>004-081900-
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-Northern Middlesex MA-
Northwest Providence RI-Southeast Providence RI-Western Kent RI-
Eastern Kent RI-
Including the cities of Hartford, Windsor Locks, Union, Vernon,
Putnam, Willimantic, Charlemont, Greenfield, Orange, Barre,
Fitchburg, Framingham, Lowell, Lawrence, Gloucester,
Chesterfield, Blandford, Amherst, Northampton, Springfield,
Milford, Worcester, Foxborough, Norwood, Cambridge, Boston,
Quincy, Taunton, Brockton, Plymouth, Ayer, Foster, Smithfield,
Providence, Coventry, West Greenwich, East Greenwich, Warwick,
and West Warwick
956 AM EDT Sat Jul 8 2017

...Scattered thunderstorms are expected this afternoon and
early evening some of which may be strong to severe...

Scattered thunderstorms are expected to develop this afternoon.
Some of these storms may become strong to severe with the main
threat being damaging straight line wind gusts, but some hail is
also possible with the strongest storms.  Dangerous cloud to
ground lightning along with brief torrential rainfall may result
in localized urban street flooding. The main time of concern is
between noon and 7 pm this evening.

Individuals with outdoor plans should keep an eye to the sky.
Remember, if you hear thunder it means you are close enough to get
struck by lightning and should seek an indoor shelter immediately.

Frank
Special weather statement, Jul 8, 11:43 AM EDT, 2 hours 42 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
1143 AM EDT SAT JUL 8 2017

MAZ002-003-008-009-081645-
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Eastern Franklin MA-
1143 AM EDT SAT JUL 8 2017

...Strong Thunderstorms moving into northwestern Massachusetts...

At 1138 AM EDT, Doppler radar was tracking a line of strong
thunderstorms extending from near Brattleboro Vermont southwestward
across northwest Berkshire County and to the east of Albany.
Movement was to the east at 25 mph.

The storms will become more numerous across western Franklin and
western Hampshire Counties between noon and 1 PM. Frequent
lightning, locally heavy downpours, wind gusts to 30 mph, and pea
size hail are likely in the stronger storms.

Locations impacted include...
Greenfield, Orange, Deerfield, Monroe, Montague, Sunderland,
Northfield, Williamsburg, Huntington, Bernardston, Buckland, Conway,
Shelburne, Leverett, Erving, Ashfield, Colrain, Gill, Whately and
Chester.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when these storms approach. Winds may be strong enough to
produce minor damage, such as a few downed branches.

&&

LAT...LON 4239 7301 4263 7295 4266 7295 4267 7300
      4270 7295 4270 7302 4274 7302 4272 7230
      4267 7227 4266 7223 4262 7223 4228 7300
      4231 7300 4231 7303 4233 7306 4238 7307
TIME...MOT...LOC 1538Z 287DEG 24KT 4288 7269 4243 7381

Field
Special weather statement, Jul 8, 12:32 PM EDT, 1 hour 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
1232 PM EDT SAT JUL 8 2017

MAZ002-003-008-010-081715-
Western Franklin MA-Western Hampshire MA-Eastern Franklin MA-
Eastern Hampshire MA-
1232 PM EDT SAT JUL 8 2017

...Strong thunderstorm moving into southern Franklin and northern
Hampshire Counties...

At 1229 PM EDT, Doppler radar was tracking a strong thunderstorm over
East Windsor, or 13 miles east of Pittsfield, moving east at 35 mph.

Torrential downpours, frequent lightning, and wind gusts to 30 mph
will accompany this storm. Ponding of water on roadways can be
expected.

Locations impacted include...
Amherst, Northampton, Deerfield, Belchertown, Montague, Hadley,
Sunderland, Hatfield, Williamsburg, Buckland, Conway, Shelburne,
Leverett, Shutesbury, Ashfield, Whately, Pelham, Chesterfield,
Worthington and Goshen.

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 4252 7297 4256 7298 4259 7297 4253 7235
      4230 7239 4241 7300
TIME...MOT...LOC 1629Z 280DEG 32KT 4250 7300

Field
Special weather statement, Jul 8, 12:54 PM EDT, 1 hour 31 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
1254 PM EDT SAT JUL 8 2017

MAZ002>004-008>010-026-081745-
Western Franklin MA-Northwest Middlesex County MA-
Western Hampshire MA-Western Hampden MA-Northern Worcester MA-
Eastern Franklin MA-Eastern Hampshire MA-
1254 PM EDT SAT JUL 8 2017

...Strong Thunderstorms moving across north central and western
Massachusetts...

At 1251 PM EDT, Doppler radar was tracking strong thunderstorms
along a line extending from Northfield to near Conway to near Lee.
Movement was east at 20 mph.

Torrential downpours, frequent lightning, and wind gusts to 30 mph
will accompany these storms as they move across western and north
central Massachusetts.

Locations impacted include...
Fitchburg, Amherst, Northampton, Greenfield, Orange, Deerfield,
Gardner, Easthampton, Belchertown, Athol, Winchendon, Townsend,
Montague, Templeton, Westminster, Ashburnham, Southampton, Barre,
Hadley and Hubbardston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when these storms approach. Winds may be strong enough to
produce minor damage, such as a few downed branches.

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

&&

LAT...LON 4238 7301 4243 7300 4250 7276 4273 7239
      4271 7174 4246 7208 4226 7274 4228 7300
      4231 7300 4233 7306 4238 7307
TIME...MOT...LOC 1651Z 273DEG 17KT 4280 7225 4250 7266 4234 7322

Field
Special weather statement, Jul 8, 1:32 PM EDT, 53 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
132 PM EDT SAT JUL 8 2017

MAZ004-081800-
Northern Worcester MA-
132 PM EDT SAT JUL 8 2017

...Strong Thunderstorms in northwestern Worcester County...

At 130 PM EDT, Doppler radar was tracking a strong thunderstorm over
Phillipston, or 10 miles southeast of Orange, moving east at 40 mph.
Another strong storm was near Petersham.

Winds in excess of 40 mph will accompany these storms, along with
torrential downpours and frequent lightning.

Locations impacted include...
Leominster, Fitchburg, Gardner, Lunenburg, Templeton, Sterling,
Westminster, Barre, Hubbardston, Princeton, Phillipston and
Petersham.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

These storms may intensity and become capable of producing damage.
Stay tuned for updated statements and possible warnings.

&&

LAT...LON 4244 7223 4259 7214 4260 7171 4244 7176
TIME...MOT...LOC 1730Z 269DEG 34KT 4254 7211

Field
Special weather statement, Jul 8, 2:25 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
225 PM EDT SAT JUL 8 2017

MAZ005>007-014-026-081915-
Northwest Middlesex County MA-Eastern Essex MA-
Central Middlesex County MA-Western Essex MA-Southeast Middlesex MA-
225 PM EDT SAT JUL 8 2017

...Strong Thunderstorms moving into northeastern Massachusetts...

At 224 PM EDT, Doppler radar was tracking a strong thunderstorm over
Littleton, or 7 miles southwest of Chelmsford, moving east at 50 mph.

Wind gusts to 40 to 50 mph, frequent lightning, and brief heavy
downpours will accompany this storm.

Locations impacted include...
Lowell, Lynn, Malden, Medford, Revere, Peabody, Arlington, Salem,
Billerica, Beverly, Woburn, Chelmsford, Andover, Lexington,
Tewksbury, North Andover, Melrose, Saugus, Danvers and Wakefield.

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 4245 7089 4244 7091 4243 7091 4243 7097
      4244 7097 4243 7101 4245 7102 4243 7102
      4245 7155 4248 7156 4253 7153 4254 7154
      4255 7159 4263 7159 4269 7086
TIME...MOT...LOC 1824Z 270DEG 43KT 4254 7149

Field

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 8, 4:01 AM EDTSmall Craft AdvisoryBOX15 hr
Jul 8, 11:43 AM EDTSpecial Weather StatementBOXFranklin62 min
Jul 8, 12:32 PM EDTSpecial Weather StatementBOXHampshire43 min
Jul 8, 12:54 PM EDTSpecial Weather StatementBOXFranklin, Hampshire51 min
Jul 8, 1:32 PM EDTSpecial Weather StatementBOXWorcester28 min
Jul 8, 1:53 PM EDTSevere Thunderstorm WarningBOXMiddlesex, Worcester37 min
Jul 8, 2:37 PM EDTSpecial Marine WarningBOX53 min
Jul 8, 3:13 PM EDTSevere Thunderstorm WarningBOXEssex32 min
Jul 8, 3:26 PM EDTSpecial Marine WarningBOX64 min
Jul 8, 4:24 PM EDTSpecial Weather StatementBOXHampshire36 min
Jul 8, 5:09 PM EDTSpecial Weather StatementBOXWorcester51 min
Jul 8, 5:42 PM EDTSpecial Marine WarningBOX48 min
Jul 8, 5:52 PM EDTSpecial Weather StatementBOXNorfolk38 min
Jul 8, 7:04 PM EDTSpecial Weather StatementBOXNorfolk41 min
Jul 8, 7:39 PM EDTSpecial Weather StatementBOXNorfolk, Suffolk51 min

Nearby

Special Weather Statements in Massachusetts, 2017Every special weather statement in 2017

Sources

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