Alert archive / Connecticut / Special Weather Statements in 2017

Special Weather Statement, NWS Boston/Norton, MA

June 27, 2017

NWS Boston/Norton, MA issued this special weather statement at Jun 27, 2017, 6:43 PM EDT. It was in force for 47 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 27, 2017, 6:43 PM EDT (22:43 UTC)
Expired
Jun 27, 2017, 7:30 PM EDT
In force
47 min
Issued by
NWS Boston/Norton, MA

The radar

The Boston radar (KBOX), 103 km from the middle of the area, began a volume at 22:47 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

Brookhaven, NY (KOKX), launched 12:00Z, 10.7 hours before the alert went out and 108 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, Brookhaven, NY at 12:00Z on 2017-06-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 48 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, Brookhaven, NY at 12:00Z on 2017-06-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -49 square meters per square second.1939587897117Sfc1 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
48 J/kg
Mixed-layer CIN
-70 J/kg
Mixed-layer LCL
1183 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
-49 m²/s²
0-3 km storm-relative helicity
233 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.7

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 27, 4:43 PM EDT, 2 hours earlier.

Area forecast discussion, Jun 27, 4:43 PM EDT, 2 hours before
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Hazardous weather outlook, Jun 27, 4:16 AM EDT, 14 hours 27 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
416 AM EDT Tue Jun 27 2017

CTZ002>004-MAZ002>024-026-RIZ001>008-280830-
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-
416 AM EDT Tue Jun 27 2017

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

.DAY ONE...Today and Tonight.

Scattered thunderstorms will develop this afternoon with a few
strong to severe storms possible. Main risks are gusty winds and
hail.

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

Active weather pattern which may result in a few strong storms Friday
into Sunday.

.SPOTTER INFORMATION STATEMENT...

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

ANZ230>237-250-251-254>256-280830-
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-
416 AM EDT Tue Jun 27 2017

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

.DAY ONE...Today and Tonight.

Scattered thunderstorms will develop this afternoon and may impact
near shore eastern waters. A few strong to severe storms are possible.
Main risks are gusty winds and hail.

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

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, Jun 27, 6:05 PM EDT, 38 minutes before
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Special weather statement, Jun 27, 6:17 PM EDT, 26 minutes before
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Local storm report, Jun 27, 6:23 PM EDT, 20 minutes before
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Special weather statement, Jun 27, 6:34 PM EDT, 9 minutes before
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Special weather statement, Jun 27, 6:38 PM EDT, 5 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
638 PM EDT TUE JUN 27 2017

MAZ007-014-015-272315-
Eastern Essex MA-Suffolk MA-Southeast Middlesex MA-
638 PM EDT TUE JUN 27 2017

...Strong Thunderstorms Developing in northern Norfolk...Suffolk...
south central Essex and east central Middlesex Counties COUNTIES...

At 638 PM EDT, Doppler radar was tracking a thunderstorm over
Watertown, moving northeast at 40 mph.

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

Locations impacted include...
Boston, Cambridge, Lynn, Newton, Somerville, Waltham, Malden,
Brookline, Medford, Revere, Peabody, Arlington, Everett, Salem,
Woburn, Chelsea, Watertown, Lexington, Melrose and Saugus.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 4249 7080 4247 7082 4244 7091 4241 7090
      4242 7095 4235 7093 4228 7119 4232 7123
      4233 7127 4234 7126 4240 7128 4242 7127
      4251 7113 4250 7110 4257 7104 4257 7100
TIME...MOT...LOC 2238Z 239DEG 33KT 4236 7118

md
Special weather statement, Jun 27, 6:43 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
643 PM EDT TUE JUN 27 2017

CTZ002>004-MAZ012-272330-
Hartford CT-Tolland CT-Windham CT-Southern Worcester MA-
643 PM EDT TUE JUN 27 2017

...Strong Thunderstorm in Windham...Tolland...southeastern Hartford
and south central Worcester Counties...

At 643 PM EDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Stafford to Rocky Hill to near Cheshire.
Movement was east at 20 mph.

Hail up to nickel size and winds in excess of 30 mph will accompany
these storms.

Locations impacted include...
Meriden, Manchester, East Hartford, Glastonbury, Newington, Vernon,
Wethersfield, Mansfield, South Windsor, Windham, Colchester, Berlin,
Rocky Hill, Willimantic, Killingly, Webster, Southbridge, Ellington,
Tolland and Cromwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Winds may be strong enough to produce minor damage, such as a few
downed branches.

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

&&

LAT...LON 4202 7229 4203 7213 4216 7211 4219 7194
      4201 7180 4167 7206 4165 7209 4166 7216
      4171 7224 4167 7227 4164 7233 4160 7234
      4158 7246 4165 7251 4163 7271 4158 7276
      4155 7282 4157 7284 4155 7287
TIME...MOT...LOC 2243Z 263DEG 17KT 4195 7231 4165 7268 4146 7293

md

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 27, 4:03 AM EDTSmall Craft AdvisoryBOX15 hr
Jun 27, 1:40 PM EDTSpecial Weather StatementBOXWorcester50 min
Jun 27, 2:03 PM EDTSpecial Weather StatementBOXWorcester42 min
Jun 27, 2:07 PM EDTSpecial Weather StatementBOXHampden53 min
Jun 27, 2:22 PM EDTSpecial Weather StatementBOXMiddlesex53 min
Jun 27, 2:44 PM EDTSpecial Weather StatementBOXMiddlesex31 min
Jun 27, 2:49 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire, Worcester41 min
Jun 27, 3:16 PM EDTSpecial Weather StatementBOXWorcester59 min
Jun 27, 3:28 PM EDTSpecial Weather StatementBOXMiddlesex32 min
Jun 27, 3:32 PM EDTSpecial Weather StatementBOXHampden43 min
Jun 27, 3:37 PM EDTAreal Flood AdvisoryBOXMiddlesex, Worcester113 min
Jun 27, 3:39 PM EDTSevere Thunderstorm WarningBOXWorcester51 min
Jun 27, 4:12 PM EDTSpecial Weather StatementBOXMiddlesex48 min
Jun 27, 4:43 PM EDTSpecial Weather StatementBOXEssex47 min
Jun 27, 4:46 PM EDTSevere Thunderstorm WarningBOXMiddlesex29 min
Jun 27, 5:27 PM EDTSpecial Weather StatementBOXEssex33 min
Jun 27, 5:41 PM EDTSpecial Weather StatementBOXHampshire49 min
Jun 27, 5:52 PM EDTSpecial Marine WarningBOX53 min
Jun 27, 6:17 PM EDTSpecial Weather StatementBOXHampden43 min
Jun 27, 6:34 PM EDTSpecial Weather StatementBOXFranklin, Hampshire56 min
Jun 27, 6:38 PM EDTSpecial Weather StatementBOXSuffolk37 min
Jun 27, 7:10 PM EDTSevere Thunderstorm WarningBOXFranklin, Worcester33 min
Jun 27, 7:17 PM EDTSpecial Weather StatementBOXWorcester43 min
Jun 27, 7:56 PM EDTSevere Thunderstorm WarningBOXNorfolk, Worcester49 min
Jun 27, 1:34 PM EDTSpecial Weather StatementBOX41 min
Jun 27, 3:04 PM EDTSpecial Weather StatementBOX41 min
Jun 27, 3:55 PM EDTSpecial Weather StatementBOX65 min
Jun 27, 4:53 PM EDTSpecial Weather StatementBOX67 min
Jun 27, 5:50 PM EDTSpecial Weather StatementBOX40 min
Jun 27, 6:05 PM EDTSpecial Weather StatementBOX55 min
Jun 27, 7:16 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region44 min

Nearby

Special Weather Statements in Connecticut, 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.