Alert archive / Connecticut / Special Weather Statements in 2017

Special Weather Statement, NWS Boston/Norton, MA

July 13, 2017

NWS Boston/Norton, MA issued this special weather statement at Jul 13, 2017, 2:28 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
Jul 13, 2017, 2:28 PM EDT (18:28 UTC)
Expired
Jul 13, 2017, 3:15 PM EDT
In force
47 min
Issued by
NWS Boston/Norton, MA

The radar

The Boston radar (KBOX), 95 km from the middle of the area, began a volume at 18:32 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, 6.5 hours before the alert went out and 109 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 2017-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 572 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 2017-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 103 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
572 J/kg
Mixed-layer CIN
-82 J/kg
Mixed-layer LCL
1449 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
103 m²/s²
0-3 km storm-relative helicity
140 m²/s²
Significant tornado parameter
0.1
Supercell composite
2.3

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 13, 12:11 PM EDT, 2 hours 17 minutes earlier.

Area forecast discussion, Jul 13, 12:11 PM EDT, 2 hours 17 minutes before
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      <div class="status" id="status">Temporary Notice</div>
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Hazardous weather outlook, Jul 13, 2:01 PM EDT, 27 minutes before
Hazardous Weather Outlook
National Weather Service Taunton MA
201 PM EDT Thu Jul 13 2017

MAZ002>007-012>016-019-022>024-026-RIZ008-141815-
Western Franklin MA-Eastern Franklin MA-Northern Worcester MA-
Central Middlesex MA-Western Essex MA-Eastern Essex MA-
Southern Worcester MA-Western Norfolk MA-Southeast Middlesex MA-
Suffolk MA-Eastern Norfolk MA-Eastern Plymouth MA-Barnstable MA-
Dukes MA-Nantucket MA-Northern Middlesex MA-Block Island RI-
201 PM EDT Thu Jul 13 2017

This Hazardous Weather Outlook is for central Massachusetts,
eastern Massachusetts, northeastern Massachusetts, southeastern
Massachusetts, western Massachusetts and southern Rhode Island.

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

CTZ002>004-MAZ008>011-141815-
Hartford CT-Tolland CT-Windham CT-Western Hampshire MA-
Western Hampden MA-Eastern Hampshire MA-Eastern Hampden MA-
201 PM EDT Thu Jul 13 2017

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...
...SEVERE THUNDERSTORM WATCH 412 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

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

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.
   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

MAZ017-018-020-021-RIZ001>007-141815-
Northern Bristol MA-Western Plymouth MA-Southern Bristol MA-
Southern Plymouth MA-Northwest Providence RI-Southeast Providence RI-
Western Kent RI-Eastern Kent RI-Bristol RI-Washington RI-Newport RI-
201 PM EDT Thu Jul 13 2017

...FLASH FLOOD WATCH IN EFFECT UNTIL 8 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for southeastern Massachusetts,
northern Rhode Island and southern Rhode Island.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Flash Flood Watch.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-141815-
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-
201 PM EDT Thu Jul 13 2017

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

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

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, Jul 13, 1:20 PM EDT, 1 hour 8 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
120 PM EDT THU JUL 13 2017

CTZ004-RIZ001-002-131745-
Windham CT-Northwest Providence RI-Southeast Providence RI-
120 PM EDT THU JUL 13 2017

...Strong Thunderstorm Developing in Northeast
Connecticut...

At 119 PM EDT, Doppler radar was tracking a developing strong
thunderstorm over Killingly, or 8 miles north of Plainfield, moving
east at 35 mph.

Pea size hail and winds in excess of 30 mph will accompany this
storm as it approaches Rhode Island through 145 PM.

Locations impacted include...
Cranston, Johnston, Plainfield, Killingly, Scituate, Glocester,
Brooklyn, Foster, Pomfret and Sterling.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. 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 4177 7193 4186 7193 4186 7152 4173 7153
      4173 7158
TIME...MOT...LOC 1719Z 276DEG 32KT 4181 7185

JWD
Special weather statement, Jul 13, 2:21 PM EDT, 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
221 PM EDT THU JUL 13 2017

RIZ003-004-006-131845-
Washington RI-Eastern Kent RI-Western Kent RI-
221 PM EDT THU JUL 13 2017

...Strong Thunderstorm in Western Rhode Island...

At 221 PM EDT, Doppler radar was tracking a strong thunderstorm near
Hopkinton, or 11 miles south of Coventry, moving east at 30 mph.

Winds in excess of 40 mph will accompany this storm.

Locations impacted include...
Warwick, South Kingstown, North Kingstown, Narragansett, East
Greenwich, Hopkinton, Richmond, Exeter and West Greenwich.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. 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 4147 7179 4160 7179 4165 7144 4146 7143
TIME...MOT...LOC 1821Z 267DEG 28KT 4154 7173

JWD
Special weather statement, Jul 13, 2:28 PM EDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Taunton MA
228 PM EDT THU JUL 13 2017

CTZ003-004-131915-
Tolland CT-Windham CT-
228 PM EDT THU JUL 13 2017

...Strong Thunderstorm in Southern Tolland County...

At 227 PM EDT, Doppler radar was tracking a strong thunderstorm over
Andover, or 7 miles southeast of Manchester, moving east at 30 mph.

Winds in excess of 40 mph will accompany this storm.

Locations impacted include...
Mansfield, Windham, Plainfield, Willimantic, Coventry, Hebron,
Brooklyn, Lebanon, Columbia, Canterbury, Bolton, Pomfret, Andover,
Chaplin, Hampton, Eastford and Scotland.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. 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 4179 7243 4185 7196 4166 7195 4167 7218
      4171 7224 4169 7227 4167 7227 4168 7242
TIME...MOT...LOC 1827Z 267DEG 28KT 4173 7239

JWD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 12, 8:16 PM EDTAreal Flood WarningBOXMiddlesex, Norfolk, Suffolk3 hr
Jul 13, 11:06 AM EDTFlash Flood WatchBOXBristol, Hampden, Hampshire, Plymouth8 hr
Jul 13, 2:34 PM EDTSpecial Marine WarningBOX56 min
Jul 13, 3:13 PM EDTSpecial Weather StatementBOXHampden47 min
Jul 13, 4:21 PM EDTSpecial Weather StatementBOXPlymouth39 min
Jul 13, 1:20 PM EDTSpecial Weather StatementBOXProvidence25 min
Jul 13, 2:21 PM EDTSpecial Weather StatementBOXKent24 min
Jul 13, 2:41 PM EDTFlash Flood WarningBOXWashington3 hr
Jul 13, 3:58 PM EDTSpecial Weather StatementBOX47 min
Jul 13, 4:34 PM EDTSpecial Weather StatementBOX41 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.