Alert archive / Connecticut / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 7, NWS Boston/Norton, MA

May 18, 2017Providence County, Rhode Island; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 18, 2017, 11:50 PM EDT for Providence County, Rhode Island; Northeastern Connecticut Planning Region, Connecticut. It was in force for 25 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: May 18, 2017, 11:50 PM EDT (03:50 UTC)
Expired: May 19, 2017, 12:15 AM EDT
In force: 25 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Northeastern Connecticut Planning Region, CT, Providence County, RI

The radar

The Boston radar (KBOX), 68 km from the middle of the area, began a volume at 03:53 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 00:00Z, 3.8 hours before the alert went out and 134 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: 142 J/kg
Mixed-layer CIN: -377 J/kg
Mixed-layer LCL: 2073 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 150 m²/s²
0-3 km storm-relative helicity: 237 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted.

613 
WUUS51 KBOX 190350
SVRBOX
CTC013-015-RIC007-190415-
/O.NEW.KBOX.SV.W.0007.170519T0350Z-170519T0415Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Taunton MA
1150 PM EDT THU MAY 18 2017

The National Weather Service in Taunton has issued a

* Severe Thunderstorm Warning for...
  Windham County in northern Connecticut...
  Central Tolland County in northern Connecticut...
  Western Providence County in Rhode Island...

* Until 1215 AM EDT

* At 1150 PM EDT, severe thunderstorms were located along a line
  extending from near Ashford to Tolland to near Vernon, moving east
  at 55 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to trees and power lines. 

* Locations impacted include...
  Woonsocket, Vernon, Mansfield, Windham, Plainfield, Smithfield,
  Killingly, Bellingham, Burrillville, Tolland, Uxbridge, Coventry,
  North Smithfield, Dudley, Scituate, Glocester, Putnam, Thompson,
  Blackstone and Douglas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4189 7236 4203 7201 4202 7182 4202 7180
      4201 7180 4202 7147 4182 7162 4173 7171
      4172 7179 4165 7179 4164 7180 4179 7247
      4181 7247
TIME...MOT...LOC 0350Z 274DEG 49KT 4193 7220 4187 7233 4183 7251 

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

LEC

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 12:04 AM EDT	Severe Thunderstorm Warning	BOX	Providence	27 min
May 19, 1:34 AM EDT	Special Weather Statement	BOX	Providence	26 min
May 18, 11:28 PM EDT	Special Weather Statement	BOX		32 min
May 18, 11:39 PM EDT	Special Weather Statement	BOX		36 min
May 19, 12:17 AM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	28 min
May 19, 12:27 AM EDT	Special Weather Statement	BOX		33 min
May 19, 12:41 AM EDT	Special Weather Statement	BOX		34 min
May 19, 12:51 AM EDT	Special Weather Statement	BOX		39 min

Nearby

Severe Thunderstorm Warnings in Connecticut, 2017 Severe Thunderstorm Warnings in Rhode Island, 2017 Every severe thunderstorm warning 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.