Alert archive / Connecticut / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 72, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 16, 2021, 5:05 PM EDT for Northeastern Connecticut Planning Region, Connecticut; Providence County, Rhode Island; Hampden County, Worcester County, Massachusetts. It was in force for 55 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, 2021, 5:05 PM EDT (21:05 UTC)
- Expired
- Jul 16, 2021, 6:00 PM EDT
- In force
- 55 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Northeastern Connecticut Planning Region, CT, Hampden County, MA, Worcester County, MA, Providence County, RI
The radar
The Boston radar (KBOX), 70 km from the middle of the area, began a volume at 21:06 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, 9.1 hours before the alert went out and 142 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.
- Mixed-layer CAPE
- 1044 J/kg
- Mixed-layer CIN
- -56 J/kg
- Mixed-layer LCL
- 994 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 108 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
640 WUUS51 KBOX 162105 SVRBOX CTC013-015-MAC013-027-RIC007-162200- /O.NEW.KBOX.SV.W.0072.210716T2105Z-210716T2200Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Boston/Norton MA 505 PM EDT Fri Jul 16 2021 The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for... Northern Windham County in northern Connecticut... Northeastern Tolland County in northern Connecticut... South central Worcester County in central Massachusetts... Southeastern Hampden County in western Massachusetts... Northwestern Providence County in Rhode Island... * Until 600 PM EDT. * At 504 PM EDT, a severe thunderstorm was located near Union, or 15 miles northeast of Mansfield, moving east at 20 mph. HAZARD...60 mph wind gusts and nickel size hail. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. * Locations impacted include... Smithfield, Killingly, Webster, Southbridge, Burrillville, Oxford, Uxbridge, Charlton, Stafford, North Smithfield, Dudley, Scituate, Glocester, Putnam, Thompson, Sturbridge, Douglas, Woodstock, Willington and Mendon. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. Large hail and damaging winds and continuous cloud to ground lightning is occurring with this storm. 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 this storm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4190 7224 4210 7225 4207 7156 4181 7160 TIME...MOT...LOC 2104Z 276DEG 18KT 4199 7210 HAIL...0.88IN WIND...60MPH $$ Gaucher/Nocera
The office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 2:59 PM EDT | Flash Flood Watch | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 56 hr |
| Jul 16, 3:04 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 56 min |
| Jul 16, 5:14 PM EDT | Special Weather Statement | BOX | 46 min | |
| Jul 16, 5:31 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 42 min |
| Jul 16, 5:47 PM EDT | Severe Thunderstorm Warning | BOX | Providence | 33 min |
| Jul 16, 6:17 PM EDT | Special Weather Statement | BOX | Bristol, Kent, Providence | 58 min |
| Jul 16, 9:38 AM EDT | Heat Advisory | BOX | Bristol, Essex, Middlesex, Norfolk, Plymouth, Suffolk | 9 hr |
| Jul 16, 3:41 PM EDT | Special Weather Statement | BOX | Hampden | 49 min |
| Jul 16, 4:26 PM EDT | Special Weather Statement | BOX | Norfolk, Suffolk | 49 min |
| Jul 16, 4:36 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Worcester | 35 min |
| Jul 16, 4:50 PM EDT | Special Marine Warning | BOX | 55 min | |
| Jul 16, 6:32 PM EDT | Special Marine Warning | BOX | 43 min |
Nearby
Severe Thunderstorm Warnings in Connecticut, 2021Severe Thunderstorm Warnings in Massachusetts, 2021Severe Thunderstorm Warnings in Rhode Island, 2021Every severe thunderstorm warning in 2021
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.