Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 95, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 27, 2021, 7:01 PM EDT for Providence County, Rhode Island; Hampden County, Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It was in force for 44 min. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jul 27, 2021, 7:01 PM EDT (23:01 UTC)
- Expired
- Jul 27, 2021, 7:45 PM EDT
- In force
- 44 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 1.0 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), 73 km from the middle of the area, began a volume at 23:05 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 27, 7:25 PM EDT | TSTM WND DMG | 4 Nne Glocester, RI | TREE DOWN ON A CAR NEAR 1720 VICTORY HIGHWAY IN BURRILLVILLE. RELAYED BY AMATEUR RADIO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 27, 2:47 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 11.0 hours before the alert went out and 144 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2105 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
343
WUUS51 KBOX 272301
SVRBOX
CTC013-015-MAC013-027-RIC007-280000-
/O.NEW.KBOX.SV.W.0095.210727T2301Z-210728T0000Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
701 PM EDT Tue Jul 27 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...
Southeastern Worcester County in central Massachusetts...
Southeastern Hampden County in western Massachusetts...
Northwestern Providence County in Rhode Island...
* Until 800 PM EDT.
* At 701 PM EDT, a severe thunderstorm was located over Southbridge,
or 18 miles southwest of Worcester, moving southeast 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...
Killingly, Webster, Southbridge, Burrillville, Northbridge, Oxford,
Uxbridge, Charlton, Stafford, North Smithfield, Dudley, Glocester,
Putnam, Thompson, Sturbridge, Blackstone, Sutton, Douglas, Brooklyn
and Woodstock.
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 4198 7236 4218 7207 4209 7151 4177 7180
TIME...MOT...LOC 2301Z 297DEG 16KT 4207 7204
HAIL...1.00IN
WIND...60MPH
$$
Loconto/Gaucher2 follow-up statements
677
WWUS51 KBOX 272331
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
731 PM EDT Tue Jul 27 2021
MAC013-272340-
/O.CAN.KBOX.SV.W.0095.000000T0000Z-210728T0000Z/
Hampden MA-
731 PM EDT Tue Jul 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN HAMPDEN COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Connecticut...western and central Massachusetts...and Rhode
Island.
LAT...LON 4215 7190 4209 7151 4177 7180 4196 7229
TIME...MOT...LOC 2330Z 297DEG 16KT 4201 7188
$$
CTC013-015-MAC027-RIC007-280000-
/O.CON.KBOX.SV.W.0095.000000T0000Z-210728T0000Z/
Windham CT-Tolland CT-Worcester MA-Providence RI-
731 PM EDT Tue Jul 27 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM EDT
FOR NORTHERN WINDHAM...NORTHEASTERN TOLLAND...SOUTHEASTERN WORCESTER
AND NORTHWESTERN PROVIDENCE COUNTIES...
At 730 PM EDT, a severe thunderstorm was located over Thompson, or 18
miles south of Worcester, moving southeast at 20 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Killingly, Webster, Southbridge, Burrillville, Northbridge, Oxford,
Uxbridge, Charlton, Stafford, North Smithfield, Dudley, Glocester,
Putnam, Thompson, Sturbridge, Blackstone, Sutton, Douglas, Brooklyn
and Woodstock.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
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 4215 7190 4209 7151 4177 7180 4196 7229
TIME...MOT...LOC 2330Z 297DEG 16KT 4201 7188
HAIL...0.75IN
WIND...60MPH
$$
Loconto/Gaucher712
WWUS51 KBOX 272345
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
745 PM EDT Tue Jul 27 2021
CTC013-015-MAC027-RIC007-272355-
/O.CAN.KBOX.SV.W.0095.000000T0000Z-210728T0000Z/
Windham CT-Tolland CT-Worcester MA-Providence RI-
745 PM EDT Tue Jul 27 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN WINDHAM...
NORTHEASTERN TOLLAND...SOUTHEASTERN WORCESTER AND NORTHWESTERN
PROVIDENCE COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds are
still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Connecticut...and Rhode Island.
LAT...LON 4215 7190 4209 7151 4177 7180 4196 7229
TIME...MOT...LOC 2343Z 297DEG 16KT 4198 7180
$$
Gaucher/LocontoThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 27, 7:21 PM EDT | Special Weather Statement | BOX | Kent | 39 min |
| Jul 27, 7:26 PM EDT | Severe Thunderstorm Warning | BOX | Providence | 64 min |
| Jul 27, 4:48 PM EDT | Special Weather Statement | BOX | Franklin | 27 min |
| Jul 27, 4:59 PM EDT | Special Weather Statement | BOX | Hampshire | 31 min |
| Jul 27, 5:04 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 56 min |
| Jul 27, 5:15 PM EDT | Special Weather Statement | BOX | Franklin | 30 min |
| Jul 27, 5:34 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire | 56 min |
| Jul 27, 6:01 PM EDT | Special Weather Statement | BOX | Worcester | 29 min |
| Jul 27, 6:33 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 57 min |
| Jul 27, 6:50 PM EDT | Special Weather Statement | BOX | Essex | 25 min |
| Jul 27, 6:52 PM EDT | Special Marine Warning | BOX | 53 min | |
| Jul 27, 7:11 PM EDT | Special Marine Warning | BOX | 94 min | |
| Jul 27, 7:39 PM EDT | Special Marine Warning | BOX | 66 min | |
| Jul 27, 6:27 PM EDT | Special Weather Statement | BOX | 48 min | |
| Jul 27, 6:53 PM EDT | Special Weather Statement | BOX | 37 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2021Severe Thunderstorm Warnings in Connecticut, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.