Alert archive / Rhode Island / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 80, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 17, 2021, 4:29 PM EDT for Kent County, Providence County, Rhode Island; Northeastern Connecticut Planning Region, Connecticut. It was in force for 61 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 17, 2021, 4:29 PM EDT (20:29 UTC)
- Expired
- Jul 17, 2021, 5:30 PM EDT
- In force
- 61 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Tornado
- Possible
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Northeastern Connecticut Planning Region, CT, Kent County, RI, Providence County, RI
The radar
The Boston radar (KBOX), 51 km from the middle of the area, began a volume at 20:29 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, 8.5 hours before the alert went out and 143 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
- 1203 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 1054 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.0
The text
As transmitted.
750
WUUS51 KBOX 172029
SVRBOX
CTC015-RIC003-007-172130-
/O.NEW.KBOX.SV.W.0080.210717T2029Z-210717T2130Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
429 PM EDT Sat Jul 17 2021
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
East central Windham County in northern Connecticut...
Central Kent County in Rhode Island...
Southwestern Providence County in Rhode Island...
* Until 530 PM EDT.
* At 429 PM EDT, a severe thunderstorm was located over Killingly, or
9 miles north of Plainfield, moving east at 10 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Expect wind damage to trees and power lines. Minor hail
damage to vehicles is possible.
* Locations impacted include...
Cranston, Coventry, North Providence, West Warwick, Johnston,
Smithfield, Lincoln, Killingly, Burrillville, Scituate, Glocester,
Putnam, Thompson and Foster.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4181 7190 4194 7185 4192 7147 4166 7152
TIME...MOT...LOC 2029Z 278DEG 9KT 4183 7183
TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
$$
BL1 follow-up statement
302
WWUS51 KBOX 172102
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
502 PM EDT Sat Jul 17 2021
CTC015-RIC003-007-172130-
/O.CON.KBOX.SV.W.0080.000000T0000Z-210717T2130Z/
Windham CT-Kent RI-Providence RI-
502 PM EDT Sat Jul 17 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR EAST CENTRAL WINDHAM...CENTRAL KENT AND SOUTHWESTERN PROVIDENCE
COUNTIES...
At 502 PM EDT, a severe thunderstorm was located over Scituate, or
near Johnston, moving east at 20 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Expect wind damage to trees and power lines. Minor hail
damage to vehicles is possible.
Locations impacted include...
Cranston, Coventry, North Providence, West Warwick, Johnston,
Smithfield, Lincoln, Killingly, Scituate, Glocester, Putnam and
Foster.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4181 7181 4193 7182 4192 7147 4166 7152
TIME...MOT...LOC 2102Z 277DEG 18KT 4182 7165
HAIL...1.00IN
WIND...60MPH
$$
BLThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 2:14 PM EDT | Special Weather Statement | BOX | Bristol | 46 min |
| Jul 17, 2:39 PM EDT | Areal Flood Warning | BOX | Kent, Providence | 111 min |
| Jul 17, 2:46 PM EDT | Special Weather Statement | BOX | Providence | 44 min |
| Jul 17, 2:53 PM EDT | Severe Thunderstorm Warning | BOX | Providence | 52 min |
| Jul 17, 3:26 PM EDT | Severe Thunderstorm Warning | BOX | Providence | 64 min |
| Jul 17, 3:36 PM EDT | Areal Flood Warning | BOX | Kent, Providence | 114 min |
| Jul 17, 4:06 PM EDT | Flash Flood Warning | BOX | Kent, Providence | 4 hr |
| Jul 17, 5:30 PM EDT | Flash Flood Warning | BOX | Providence | 3 hr |
| Jul 17, 5:49 PM EDT | Special Weather Statement | BOX | Bristol | 41 min |
| Jul 17, 6:05 PM EDT | Severe Thunderstorm Warning | BOX | Bristol, Kent, Providence | 26 min |
| Jul 17, 1:59 PM EDT | Special Weather Statement | BOX | 46 min | |
| Jul 17, 3:47 PM EDT | Areal Flood Warning | BOX | Northeastern Connecticut Planning Region | 118 min |
| Jul 17, 4:14 PM EDT | Flash Flood Warning | BOX | Northeastern Connecticut Planning Region | 5 hr |
| Jul 17, 4:15 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 60 min |
| Jul 17, 4:18 PM EDT | Severe Thunderstorm Warning | BOX | Northeastern Connecticut Planning Region | 57 min |
| Jul 17, 4:20 PM EDT | Special Weather Statement | BOX | 40 min | |
| Jul 17, 4:38 PM EDT | Severe Thunderstorm Warning | BOX | Capitol Planning Region | 67 min |
| Jul 17, 4:58 PM EDT | Flash Flood Warning | BOX | Capitol Planning Region | 2 hr |
| Jul 17, 5:21 PM EDT | Flash Flood Warning | BOX | Capitol Planning Region, Northeastern Connecticut Planning Region | 5 hr |
Nearby
Severe Thunderstorm Warnings in Rhode Island, 2021Severe Thunderstorm Warnings in Connecticut, 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.