Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 27, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 30, 2021, 3:48 PM EDT for Franklin County, Hampden County, Hampshire County, Massachusetts. It was in force for 57 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 30, 2021, 3:48 PM EDT (19:48 UTC)
- Expired
- Jun 30, 2021, 4:45 PM EDT
- In force
- 57 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Franklin County, MA, Hampden County, MA, Hampshire County, MA
The radar
The Albany radar (KENX), 95 km from the middle of the area, began a volume at 19:48 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jun 30, 3:21 PM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 7.8 hours before the alert went out and 82 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
- 113 J/kg
- Mixed-layer CIN
- -257 J/kg
- Mixed-layer LCL
- 1162 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
611
WUUS51 KBOX 301948
SVRBOX
MAC011-013-015-302045-
/O.NEW.KBOX.SV.W.0027.210630T1948Z-210630T2045Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
348 PM EDT Wed Jun 30 2021
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Hampshire County in western Massachusetts...
West central Franklin County in western Massachusetts...
Northwestern Hampden County in western Massachusetts...
* Until 445 PM EDT.
* At 347 PM EDT, a severe thunderstorm was located over Lenox, or
near Pittsfield, moving east at 35 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...
Chicopee, Westfield, Holyoke, Northampton, West Springfield,
Deerfield, South Hadley, Easthampton, Southampton, Hadley,
Sunderland, Hatfield, Williamsburg, Huntington, Conway, Russell,
Ashfield, Westhampton, Whately and Chester.
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.
&&
LAT...LON 4239 7305 4238 7301 4251 7297 4249 7254
4215 7261 4221 7301 4231 7300 4231 7303
4233 7306 4238 7307
TIME...MOT...LOC 1947Z 276DEG 29KT 4237 7327
HAIL...1.00IN
WIND...60MPH
$$
Frank3 follow-up statements
151
WWUS51 KBOX 301952
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
352 PM EDT Wed Jun 30 2021
MAC011-013-015-302045-
/O.CON.KBOX.SV.W.0027.000000T0000Z-210630T2045Z/
Hampshire MA-Franklin MA-Hampden MA-
352 PM EDT Wed Jun 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR HAMPSHIRE...WEST CENTRAL FRANKLIN AND NORTHWESTERN HAMPDEN
COUNTIES...
At 352 PM EDT, a severe thunderstorm was located near Lenox, or near
Pittsfield, moving east at 35 mph.
HAZARD...Golf ball size hail and 70 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Large hail may injure people caught outdoors. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable damage to trees and power lines. Wind damage
is also likely to mobile homes, roofs, and outbuildings.
Locations impacted include...
Chicopee, Westfield, Holyoke, Northampton, West Springfield,
Deerfield, South Hadley, Easthampton, Southampton, Hadley,
Sunderland, Hatfield, Williamsburg, Huntington, Conway, Russell,
Ashfield, Westhampton, Whately and Chester.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4239 7305 4238 7301 4251 7297 4249 7254
4215 7261 4221 7301 4231 7300 4231 7303
4233 7306 4238 7307
TIME...MOT...LOC 1952Z 276DEG 29KT 4237 7321
HAIL...1.75IN
WIND...70MPH
$$
Frank129
WWUS51 KBOX 302009
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
409 PM EDT Wed Jun 30 2021
MAC011-013-015-302045-
/O.CON.KBOX.SV.W.0027.000000T0000Z-210630T2045Z/
Hampshire MA-Franklin MA-Hampden MA-
409 PM EDT Wed Jun 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WESTERN HAMPSHIRE...WEST CENTRAL FRANKLIN AND NORTHWESTERN
HAMPDEN COUNTIES...
At 408 PM EDT, a severe thunderstorm was located over Becket, or 10
miles southeast of Pittsfield, moving east at 25 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...Expect considerable damage to trees and power lines. Wind
damage is also likely to mobile homes, roofs, and
outbuildings. Minor hail damage to vehicles is possible.
Locations impacted include...
Chicopee, Holyoke, Northampton, Deerfield, South Hadley, Easthampton,
Southampton, Hadley, Sunderland, Hatfield, Williamsburg, Huntington,
Conway, Ashfield, Westhampton, Whately, Chester, Blandford,
Chesterfield and Worthington.
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.
&&
LAT...LON 4239 7305 4238 7301 4251 7297 4249 7254
4218 7261 4224 7301 4231 7300 4231 7303
4233 7306 4238 7307
TIME...MOT...LOC 2008Z 274DEG 17KT 4236 7309
HAIL...1.50IN
WIND...70MPH
$$
Frank307
WWUS51 KBOX 302018
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
418 PM EDT Wed Jun 30 2021
MAC011-013-015-302045-
/O.CON.KBOX.SV.W.0027.000000T0000Z-210630T2045Z/
Hampshire MA-Franklin MA-Hampden MA-
418 PM EDT Wed Jun 30 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR WESTERN HAMPSHIRE...WEST CENTRAL FRANKLIN AND NORTHWESTERN
HAMPDEN COUNTIES...
At 418 PM EDT, a severe thunderstorm was located over Middlefield, or
15 miles west of Northampton, moving east at 35 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Expect wind damage to trees and power lines. Minor hail
damage to vehicles is possible.
Locations impacted include...
Holyoke, Northampton, Deerfield, South Hadley, Easthampton,
Southampton, Hadley, Sunderland, Hatfield, Williamsburg, Huntington,
Conway, Ashfield, Westhampton, Whately, Chester, Chesterfield,
Worthington, Goshen and Cummington.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Continuous cloud to ground lightning is occurring with this storm.
Move indoors immediately. Lightning is one of nature's leading
killers. Remember, if you can hear thunder, you are close enough to
be struck by lightning.
&&
LAT...LON 4239 7305 4238 7301 4251 7297 4249 7254
4221 7260 4226 7300 4231 7300 4231 7303
4233 7306 4238 7307
TIME...MOT...LOC 2018Z 276DEG 29KT 4235 7298
HAIL...1.00IN
WIND...60MPH
$$
FrankThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 2:29 AM EDT | Small Craft Advisory | BOX | 18 hr | |
| Jun 30, 3:40 PM EDT | Special Weather Statement | BOX | Hampshire | 65 min |
| Jun 30, 3:42 PM EDT | Special Weather Statement | BOX | Franklin | 63 min |
| Jun 30, 4:03 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 57 min |
| Jun 30, 4:32 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 58 min |
| Jun 30, 4:39 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 66 min |
| Jun 30, 4:45 PM EDT | Tornado Warning | BOX | Franklin, Worcester | 26 min |
| Jun 30, 5:00 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 30 min |
| Jun 30, 5:13 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 62 min |
| Jun 30, 5:25 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 49 min |
| Jun 30, 5:26 PM EDT | Special Marine Warning | BOX | 64 min | |
| Jun 30, 5:29 PM EDT | Severe Thunderstorm Warning | BOX | Worcester | 44 min |
| Jun 30, 5:43 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex | 51 min |
| Jun 30, 5:54 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk, Worcester | 53 min |
| Jun 30, 5:58 PM EDT | Special Marine Warning | BOX | 62 min | |
| Jun 30, 6:11 PM EDT | Special Weather Statement | BOX | Norfolk | 49 min |
| Jun 30, 6:12 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Plymouth, Suffolk, Worcester | 47 min |
| Jun 30, 6:22 PM EDT | Special Marine Warning | BOX | 53 min | |
| Jun 30, 6:31 PM EDT | Special Marine Warning | BOX | 59 min | |
| Jun 30, 6:45 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 60 min |
| Jun 30, 6:57 PM EDT | Special Marine Warning | BOX | 33 min | |
| Jun 30, 7:15 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Worcester | 60 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 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.