Alert archive / Connecticut / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 95, NWS Boston/Norton, MA

August 12, 2016Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 12, 2016, 6:11 PM EDT for Northeastern Connecticut Planning Region, Connecticut. It was in force for 49 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: Aug 12, 2016, 6:11 PM EDT (22:11 UTC)
Expired: Aug 12, 2016, 7:00 PM EDT
In force: 49 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Northeastern Connecticut Planning Region, CT

The radar

The Boston radar (KBOX), 94 km from the middle of the area, began a volume at 22:12 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, 10.2 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1049 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 724 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 138 m²/s²
0-3 km storm-relative helicity: 160 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

Open this sounding in Storm Lab

The text

As transmitted.

045 
WUUS51 KBOX 122211
SVRBOX
CTC013-015-122300-
/O.NEW.KBOX.SV.W.0095.160812T2211Z-160812T2300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
611 PM EDT FRI AUG 12 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  CENTRAL TOLLAND COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 700 PM EDT

* AT 611 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR VERNON TO CHAPLIN TO SCITUATE...MOVING
  SOUTHEAST AT 15 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

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

* LOCATIONS IMPACTED INCLUDE...
  VERNON...MANSFIELD...WINDHAM...PLAINFIELD...WILLIMANTIC...
  ELLINGTON...TOLLAND...COVENTRY...HEBRON...BROOKLYN...WILLINGTON...
  COLUMBIA...CANTERBURY...BOLTON...ASHFORD...ANDOVER...CHAPLIN...
  HAMPTON...EASTFORD AND SCOTLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

LARGE HAIL AND DAMAGING WINDS AND CONTINUOUS CLOUD TO GROUND
LIGHTNING IS OCCURRING WITH THESE STORMS. MOVE INDOORS IMMEDIATELY.
LIGHTNING IS ONE OF NATURE'S LEADING KILLERS. REMEMBER...IF YOU CAN
HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4194 7214 4164 7188 4163 7198 4166 7213
      4166 7216 4171 7224 4169 7227 4167 7227
      4164 7233 4161 7233 4160 7234 4160 7236
      4192 7249
TIME...MOT...LOC 2211Z 295DEG 18KT 4187 7243 4181 7215 4181 7164 

HAIL...<.75IN
WIND...60MPH
 
$$

SIPPRELL

1 follow-up statement

653 
WWUS51 KBOX 122219
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
619 PM EDT FRI AUG 12 2016

CTC013-015-122300-
/O.CON.KBOX.SV.W.0095.000000T0000Z-160812T2300Z/
WINDHAM CT-TOLLAND CT-
619 PM EDT FRI AUG 12 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR SOUTHWESTERN WINDHAM AND CENTRAL TOLLAND COUNTIES...

AT 619 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM NEAR TOLLAND TO CHAPLIN TO SCITUATE...MOVING SOUTHEAST
AT 20 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

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

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS SITUATION. THESE STORMS ARE PRODUCING WIDESPREAD
WIND DAMAGE ACROSS NORTHEAST CONNECTICUT AND NORTHERN RHODE ISLAND.
SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM
WINDOWS.
 
INTENSE THUNDERSTORM LINES CAN PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH A TORNADO IS NOT
IMMEDIATELY LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A BUILDING. THESE STORMS MAY CAUSE SERIOUS INJURY
AND SIGNIFICANT PROPERTY DAMAGE.

CONTINUOUS CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THESE STORMS.
MOVE INDOORS IMMEDIATELY. LIGHTNING IS ONE OF NATURE'S LEADING
KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO
BE STRUCK BY LIGHTNING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4187 7208 4164 7188 4163 7198 4166 7213
      4166 7216 4171 7224 4169 7227 4167 7227
      4164 7233 4161 7233 4160 7234 4160 7236
      4185 7246
TIME...MOT...LOC 2219Z 295DEG 18KT 4186 7239 4180 7211 4180 7160 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

SIPPRELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 8:30 PM EDT	Special Weather Statement	BOX		45 min
Aug 11, 8:41 PM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	64 min
Aug 12, 2:22 PM EDT	Excessive Heat Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	5 hr
Aug 12, 3:22 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	53 min
Aug 12, 4:14 PM EDT	Special Weather Statement	BOX		46 min
Aug 12, 4:28 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	47 min
Aug 12, 5:07 PM EDT	Special Weather Statement	BOX		53 min
Aug 12, 5:18 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	42 min
Aug 12, 5:43 PM EDT	Areal Flood Warning	BOX	Northeastern Connecticut Planning Region	2 hr
Aug 12, 5:51 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	54 min
Aug 12, 6:15 PM EDT	Flash Flood Warning	BOX	Northeastern Connecticut Planning Region	3 hr
Aug 12, 7:06 PM EDT	Heat Advisory	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	24 hr

Nearby

Severe Thunderstorm Warnings in Connecticut, 2016 Every 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.