Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2023
Severe Thunderstorm Warning 13, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 27, 2023, 3:13 AM EDT for Middlesex County, Worcester County, Massachusetts. It was in force for 24 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
- Jun 27, 2023, 3:13 AM EDT (07:13 UTC)
- Expired
- Jun 27, 2023, 3:37 AM EDT
- In force
- 24 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Middlesex County, MA, Worcester County, MA
The radar
The Boston radar (KBOX), 84 km from the middle of the area, began a volume at 07:15 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
Gray, ME (KGYX), launched 00:00Z, 7.2 hours before the alert went out and 183 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
- 21 J/kg
- Mixed-layer CIN
- -96 J/kg
- Mixed-layer LCL
- 453 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
240 WUUS51 KBOX 270713 SVRBOX MAC017-027-270800- /O.NEW.KBOX.SV.W.0013.230627T0713Z-230627T0800Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Boston/Norton MA 313 AM EDT Tue Jun 27 2023 The National Weather Service in Boston/Norton has issued a * Severe Thunderstorm Warning for... Northeastern Worcester County in central Massachusetts... Northwestern Middlesex County in northeastern Massachusetts... * Until 400 AM EDT. * At 313 AM EDT, a severe thunderstorm was located over Leominster, moving northeast at 35 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. * Locations impacted include... Leominster, Fitchburg, Dracut, Westford, Gardner, Pepperell, Tyngsborough, Groton, Lunenburg, Townsend, Lancaster, Sterling, Ayer, Westminster, Shirley, Harvard, Ashburnham, Hubbardston, Princeton and Dunstable. 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 4269 7135 4245 7178 4249 7203 4271 7182 TIME...MOT...LOC 0713Z 211DEG 30KT 4252 7176 HAIL THREAT...RADAR INDICATED MAX HAIL SIZE...0.75 IN WIND THREAT...RADAR INDICATED MAX WIND GUST...60 MPH $$ BL
2 follow-up statements
983
WWUS51 KBOX 270731
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
331 AM EDT Tue Jun 27 2023
MAC017-027-270800-
/O.CON.KBOX.SV.W.0013.000000T0000Z-230627T0800Z/
Worcester MA-Middlesex MA-
331 AM EDT Tue Jun 27 2023
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 AM EDT
FOR NORTH CENTRAL WORCESTER AND NORTHWESTERN MIDDLESEX COUNTIES...
At 331 AM EDT, a severe thunderstorm was located over Pepperell, or 9
miles northeast of Fitchburg, moving northeast at 35 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Fitchburg, Dracut, Westford, Pepperell, Tyngsborough, Groton,
Lunenburg, Townsend, Ayer, Shirley, Ashburnham, Dunstable and Ashby.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4269 7135 4258 7155 4258 7171 4265 7188
4271 7182
TIME...MOT...LOC 0731Z 211DEG 30KT 4265 7165
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
BL882
WWUS51 KBOX 270737
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
337 AM EDT Tue Jun 27 2023
MAC017-027-270747-
/O.CAN.KBOX.SV.W.0013.000000T0000Z-230627T0800Z/
Worcester MA-Middlesex MA-
337 AM EDT Tue Jun 27 2023
...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL WORCESTER AND
NORTHWESTERN MIDDLESEX COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and has exited the warned area. Therefore, the warning has
been cancelled.
LAT...LON 4269 7135 4258 7155 4258 7171 4265 7188
4271 7182
TIME...MOT...LOC 0736Z 211DEG 30KT 4270 7161
$$
BLThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 8:49 PM EDT | Special Weather Statement | BOX | Franklin, Hampshire | 56 min |
| Jun 26, 9:50 PM EDT | Special Weather Statement | BOX | Franklin | 55 min |
| Jun 27, 1:20 AM EDT | Special Marine Warning | BOX | 25 min | |
| Jun 27, 1:40 AM EDT | Severe Thunderstorm Warning | BOX | Worcester | 50 min |
| Jun 27, 2:00 AM EDT | Special Marine Warning | BOX | 19 min | |
| Jun 27, 2:25 AM EDT | Special Marine Warning | BOX | 65 min | |
| Jun 27, 2:31 AM EDT | Special Weather Statement | BOX | Worcester | 44 min |
| Jun 27, 3:28 AM EDT | Special Marine Warning | BOX | 46 min | |
| Jun 27, 4:29 AM EDT | Special Weather Statement | BOX | Nantucket | 31 min |
| Jun 27, 4:33 AM EDT | Special Weather Statement | BOX | Bristol | 42 min |
| Jun 27, 4:44 AM EDT | Flash Flood Warning | BOX | Bristol | 56 min |
| Jun 27, 6:14 AM EDT | Special Marine Warning | BOX | 61 min | |
| Jun 27, 7:08 AM EDT | Special Marine Warning | BOX | 52 min | |
| Jun 27, 9:52 AM EDT | Special Marine Warning | BOX | 53 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2023Every severe thunderstorm warning in 2023
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.