Alert archive / Massachusetts / Special Weather Statements in 2017

Special Weather Statement, NWS Boston/Norton, MA

June 30, 2017Middlesex County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jun 30, 2017, 9:59 PM EDT for Middlesex County, Worcester County, Massachusetts. It was in force for 61 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
Jun 30, 2017, 9:59 PM EDT (01:59 UTC)
Expired
Jun 30, 2017, 11:00 PM EDT
In force
61 min
Issued by
NWS Boston/Norton, MA

Counties Middlesex County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 70 km from the middle of the area, began a volume at 02:02 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

Albany, NY (KALY), launched 00:00Z, 2.0 hours before the alert went out and 173 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, Albany, NY at 00:00Z on 2017-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 407 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, Albany, NY at 00:00Z on 2017-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 144 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
407 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
834 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
144 m²/s²
0-3 km storm-relative helicity
259 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.6

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 Jun 30, 7:54 PM EDT, 2 hours 5 minutes earlier.

Area forecast discussion, Jun 30, 7:54 PM EDT, 2 hours 5 minutes before
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Hazardous weather outlook, Jun 30, 7:37 PM EDT, 2 hours 22 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
737 PM EDT Fri Jun 30 2017

CTZ002>004-MAZ002>024-026-RIZ001>008-012345-
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-
737 PM EDT Fri Jun 30 2017

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

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

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

Late Saturday into Saturday night...

There is a low risk for a few strong thunderstorms across Southern
New England.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-012345-
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-
737 PM EDT Fri Jun 30 2017

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

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

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

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

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

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

You can follow us on Twitter at
@NWSBoston

In the hours before

Special weather statement, Jun 30, 6:53 PM EDT, 3 hours 6 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
653 PM EDT FRI JUN 30 2017

CTZ002-302330-
Hartford CT-
653 PM EDT FRI JUN 30 2017

...Strong Thunderstorm moving across southernmost Hartford County...

At 650 PM EDT, Doppler radar was tracking a strong thunderstorm over
Cheshire, or near Waterbury, moving east at 25 mph. This storm may
clip the southern portions of the towns of Southington and Berlin.

Nickel size hail and wind gusts up to 50 mph will accompany this
storm.

Locations impacted include...
Southington and Berlin.

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 4159 7294 4159 7275 4158 7276 4157 7280
      4155 7282 4157 7283 4157 7285 4155 7285
      4155 7287 4156 7288 4156 7295
TIME...MOT...LOC 2250Z 270DEG 22KT 4153 7293

Field
Local storm report, Jun 30, 6:58 PM EDT, 3 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TAUNTON MA
658 PM EDT FRI JUN 30 2017

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

0524 PM     TSTM WND DMG     CHARLEMONT              42.63N  72.88W
06/30/2017                   FRANKLIN           MA   AMATEUR RADIO

            TREE DOWN ON ROUTE 2 PARTIALLY BLOCKING THE ROAD NEAR
            THE SAVOY STATE FOREST.

0605 PM     FLOOD            GREENFIELD              42.59N  72.60W
06/30/2017                   FRANKLIN           MA   AMATEUR RADIO

            SEVERAL STREETS FLOODED AND IMPASSABLE INCLUDING
            CHAPMAN... GRINNELL AND DEERFIELD STREETS.

0611 PM     TSTM WND DMG     CANTON                  41.82N  72.90W
06/30/2017                   HARTFORD           CT   AMATEUR RADIO

            TREE DOWN ON EAST HILL ROAD... GRACEY ROAD... AND ON
            LAWTON ROAD AT WASHBURN ROAD.

0611 PM     TSTM WND DMG     CANTON                  41.82N  72.90W
06/30/2017                   HARTFORD           CT   AMATEUR RADIO

            BAHRE CORNER ROAD ... 5 TRANSFORMERS ALONG WITH TREES
            AND WIRES BLOWN OVER DOWN ONTO THE GROUND.

0615 PM     TSTM WND DMG     SIMSBURY                41.88N  72.81W
06/30/2017                   HARTFORD           CT   AMATEUR RADIO

            TREE DOWN ON CAR ON NOTCH ROAD. TREES DOWN ON WIRES ON
            WEST MOUNTAIN ROAD AT ROSWELL. TREE DOWN ON ROUTE 10 202
            NEAR BIKE PATH.

0641 PM     FLOOD            WEST HARTFORD           41.77N  72.75W
06/30/2017                   HARTFORD           CT   AMATEUR RADIO

            ALONG NORTH MAIN STREET AND ALBANY AVENUE ROUTE 44
            ROUGHLY 2.0 TO 2.5 FEET OF STREET FLOODING.

&&

SIPPRELL
Special weather statement, Jun 30, 7:39 PM EDT, 2 hours 20 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
739 PM EDT FRI JUN 30 2017

MAZ005-006-026-010030-
Northwest Middlesex County MA-Central Middlesex County MA-
Western Essex MA-
739 PM EDT FRI JUN 30 2017

...Strong Thunderstorm moving through west central Essex and
northeastern Middlesex Counties...

At 737 PM EDT, Doppler radar was tracking a strong thunderstorm over
Groton, or 9 miles west of Chelmsford, moving east at 35 mph.

Winds in excess of 40 mph will accompany this storm along with heavy
downpours.

Locations impacted include...
Lowell, Nashua, Lawrence, Methuen, Billerica, Chelmsford, Andover,
Dracut, Tewksbury, North Andover, Salem, Wilmington, Westford, North
Reading, Pepperell, Tyngsborough, Groton, Littleton, Hollis and Ayer.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 4259 7106 4256 7161 4269 7166 4271 7157
      4270 7129 4274 7124 4274 7119 4277 7118
      4278 7115
TIME...MOT...LOC 2337Z 256DEG 30KT 4261 7155

Thompson
Special weather statement, Jun 30, 9:10 PM EDT, 49 minutes before
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Special weather statement, Jun 30, 9:32 PM EDT, 27 minutes before
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Special weather statement, Jun 30, 9:59 PM EDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 30, 9:10 PM EDTSpecial Weather StatementBOXHampshire, Worcester35 min
Jul 1, 4:19 AM EDTSmall Craft AdvisoryBOX19 hr

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.