Alert archive / Connecticut / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 43, NWS Boston/Norton, MA

July 18, 2016Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 18, 2016, 3:56 PM EDT for Capitol Planning Region, Northeastern Connecticut Planning Region, Connecticut. It was in force for 64 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 18, 2016, 3:56 PM EDT (19:56 UTC)
Expired
Jul 18, 2016, 5:00 PM EDT
In force
64 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Capitol Planning Region, CT, Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 101 km from the middle of the area, began a volume at 19:58 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 18, 12:05 PM EDTSevere Thunderstorm WatchSPC8 hr

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 7.9 hours before the alert went out and 103 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 2016-07-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2016-07-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 128 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
1 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1554 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
128 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted.

262 
WUUS51 KBOX 181956
SVRBOX
CTC003-013-015-182100-
/O.NEW.KBOX.SV.W.0043.160718T1956Z-160718T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
356 PM EDT MON JUL 18 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  SOUTHERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  SOUTHEASTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 500 PM EDT

* AT 356 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER
  GLASTONBURY... MOVING EAST AT 35 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  HARTFORD...WEST HARTFORD...MANCHESTER...EAST HARTFORD...
  GLASTONBURY...NEWINGTON...VERNON...WETHERSFIELD...MANSFIELD...
  WINDHAM...ROCKY HILL...WILLIMANTIC...COVENTRY...HEBRON...
  BROOKLYN...MARLBOROUGH...WILLINGTON...COLUMBIA...
  CANTERBURY AND BOLTON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4188 7201 4163 7196 4166 7213 4166 7216
      4171 7224 4169 7227 4167 7227 4164 7233
      4161 7233 4160 7234 4160 7248 4165 7251
      4163 7270 4177 7272
TIME...MOT...LOC 1956Z 264DEG 30KT 4169 7261 

HAIL...0.75IN
WIND...60MPH
 
$$
FIELD
1 follow-up statement
007 
WWUS51 KBOX 182019
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
419 PM EDT MON JUL 18 2016

CTC003-182028-
/O.CAN.KBOX.SV.W.0043.000000T0000Z-160718T2100Z/
HARTFORD CT-
419 PM EDT MON JUL 18 2016

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HARTFORD COUNTY
IS CANCELLED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF
HARTFORD COUNTY. THEREFORE...THE WARNING FOR HARTFORD COUNTY HAS
BEEN CANCELLED.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT FOR
NORTHERN CONNECTICUT.

LAT...LON 4167 7244 4180 7245 4188 7201 4164 7196
      4166 7213 4166 7216 4171 7224 4169 7227
      4167 7227 4165 7233 4161 7236 4160 7234
      4160 7238
TIME...MOT...LOC 2018Z 264DEG 36KT 4171 7232 

$$

CTC013-015-182100-
/O.CON.KBOX.SV.W.0043.000000T0000Z-160718T2100Z/
WINDHAM CT-TOLLAND CT-
419 PM EDT MON JUL 18 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR SOUTHWESTERN WINDHAM AND SOUTHERN TOLLAND COUNTIES...

AT 418 PM EDT...A SEVERE THUNDERSTORM WAS LOCATED OVER COLUMBIA...OR
7 MILES SOUTHWEST OF MANSFIELD...MOVING EAST AT 40 MPH.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
MANSFIELD...WINDHAM...WILLIMANTIC...COVENTRY...HEBRON...BROOKLYN...
WILLINGTON...COLUMBIA...CANTERBURY...BOLTON...ASHFORD...POMFRET...
ANDOVER...CHAPLIN...HAMPTON...EASTFORD AND SCOTLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

LAT...LON 4167 7244 4180 7245 4188 7201 4164 7196
      4166 7213 4166 7216 4171 7224 4169 7227
      4167 7227 4165 7233 4161 7236 4160 7234
      4160 7238
TIME...MOT...LOC 2018Z 264DEG 36KT 4171 7232 

HAIL...0.75IN
WIND...60MPH
 
$$
FIELD

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 2:41 PM EDTSpecial Weather StatementBOX49 min
Jul 18, 3:14 PM EDTSpecial Weather StatementBOX46 min
Jul 18, 3:22 PM EDTSevere Thunderstorm WarningBOXCapitol Planning Region38 min
Jul 18, 4:42 PM EDTSevere Thunderstorm WarningBOXNortheastern Connecticut Planning Region18 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2016Every severe thunderstorm warning in 2016

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.