Alert archive / Connecticut / Special Weather Statements in 2018

Special Weather Statement, NWS Boston/Norton, MA

July 16, 2018

NWS Boston/Norton, MA issued this special weather statement at Jul 16, 2018, 5:23 PM EDT. It was in force for 67 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 16, 2018, 5:23 PM EDT (21:23 UTC)
Expired
Jul 16, 2018, 6:30 PM EDT
In force
67 min
Issued by
NWS Boston/Norton, MA

The radar

The Boston radar (KBOX), 67 km from the middle of the area, began a volume at 21:25 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, 9.4 hours before the alert went out and 139 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 2018-07-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 696 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 2018-07-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 28 square meters per square second.1939Sfc1 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
696 J/kg
Mixed-layer CIN
-87 J/kg
Mixed-layer LCL
1024 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
28 m²/s²
0-3 km storm-relative helicity
66 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 16, 4:04 PM EDT, 1 hour 19 minutes earlier.

Area forecast discussion, Jul 16, 4:04 PM EDT, 1 hour 19 minutes before
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Hazardous weather outlook, Jul 16, 3:16 PM EDT, 2 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Boston/Norton MA
316 PM EDT Mon Jul 16 2018

CTZ002>004-MAZ002>024-026-RIZ001>008-171930-
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-
316 PM EDT Mon Jul 16 2018

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

.DAY ONE...This Afternoon and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Tuesday and Tuesday night...

Showers and thunderstorms with heavy rainfall may result in a
localized flash flood threat for urban areas and small streams. A
few severe thunderstorms with strong wind gusts are also possible.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

ANZ230>237-250-251-254>256-171930-
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-
316 PM EDT Mon Jul 16 2018

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

.DAY ONE...This Afternoon and Tonight.

Hazardous weather is not expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Strong thunderstorms are possible over the waters late Tuesday and
Tuesday night.

.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 16, 1:24 PM EDT, 3 hours 59 minutes before
Special Weather Statement
National Weather Service Boston/Norton MA
124 PM EDT MON JUL 16 2018

MAZ004-012-161815-
Southern Worcester MA-Northern Worcester MA-
124 PM EDT MON JUL 16 2018

...TORRENTIAL RAINFALL OVER THE MASS PIKE SOUTH OF WORCESTER...

At 123 PM EDT, Doppler radar was tracking a thunderstorm over
Auburn, or 7 miles southwest of Worcester, moving east at 5 mph.

Locations impacted include...
Worcester, Shrewsbury, Grafton, Auburn, Oxford, Millbury, Charlton,
Spencer, Leicester and Sutton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4214 7197 4222 7194 4227 7168 4210 7171
TIME...MOT...LOC 1723Z 272DEG 6KT 4218 7188

MD
Special weather statement, Jul 16, 3:23 PM EDT, 2 hours before
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Special weather statement, Jul 16, 3:33 PM EDT, 1 hour 50 minutes before
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Special weather statement, Jul 16, 4:25 PM EDT, 58 minutes before
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Special weather statement, Jul 16, 5:23 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
Jul 15, 8:16 PM EDTSevere Thunderstorm WarningBOXWorcester33 min
Jul 16, 1:24 PM EDTSpecial Weather StatementBOXWorcester51 min
Jul 16, 3:07 PM EDTSmall Craft AdvisoryBOX32 hr
Jul 16, 3:33 PM EDTSpecial Weather StatementBOXNorfolk42 min
Jul 16, 3:23 PM EDTSpecial Weather StatementBOX67 min
Jul 16, 4:25 PM EDTSpecial Weather StatementBOX50 min

Nearby

Special Weather Statements in Connecticut, 2018Every special weather statement in 2018

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.