Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 2, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 26, 2021, 5:47 PM EDT for Franklin County, Hampshire County, Worcester County, Massachusetts. It was in force for 58 min. 4 reports 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
- May 26, 2021, 5:47 PM EDT (21:47 UTC)
- Expired
- May 26, 2021, 6:45 PM EDT
- In force
- 58 min
- Issued by
- NWS Boston/Norton, MA
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Franklin County, MA, Hampshire County, MA, Worcester County, MA
The radar
The Albany radar (KENX), 103 km from the middle of the area, began a volume at 21:49 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 |
|---|---|---|---|
| May 26, 5:52 PM EDT | TSTM WND DMG | Leyden, MA | LARGE TREE DOWN ON EDEN TRAIL ROAD |
| May 26, 6:00 PM EDT | TSTM WND DMG | Bernardston, MA | TREE DOWN ON CROSS STREET |
| May 26, 6:35 PM EDT | TSTM WND DMG | Pelham, MA | TREE DOWN ON JONES ROAD |
| May 26, 6:39 PM EDT | TSTM WND DMG | Pelham, MA | TREE DOWN ON AMHERST ROAD |
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 |
|---|---|---|---|
| May 26, 3:56 PM EDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Albany, NY (KALY), launched 12:00Z, 9.8 hours before the alert went out and 87 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
- 6 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 1196 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 137 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
764
WUUS51 KBOX 262147
SVRBOX
MAC011-015-027-262245-
/O.NEW.KBOX.SV.W.0002.210526T2147Z-210526T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
547 PM EDT Wed May 26 2021
The National Weather Service in Boston/Norton has issued a
* Severe Thunderstorm Warning for...
Northwestern Worcester County in central Massachusetts...
Central Hampshire County in western Massachusetts...
Franklin County in western Massachusetts...
* Until 645 PM EDT.
* At 547 PM EDT, severe thunderstorms were located along a line
extending from Bernardston to near Chesterfield, moving east at 35
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Amherst, Northampton, Greenfield, Orange, Deerfield, Belchertown,
Athol, Winchendon, Ware, Montague, Templeton, Hadley, Sunderland,
Hatfield, Northfield, Hardwick, Williamsburg, Huntington,
Bernardston and Buckland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4239 7306 4238 7301 4243 7300 4245 7294
4273 7272 4271 7203 4231 7226 4235 7306
4238 7307
TIME...MOT...LOC 2146Z 263DEG 31KT 4270 7257 4239 7281
HAIL...<.75IN
WIND...60MPH
$$
BL3 follow-up statements
284
WWUS51 KBOX 262200
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
600 PM EDT Wed May 26 2021
MAC011-015-027-262245-
/O.CON.KBOX.SV.W.0002.000000T0000Z-210526T2245Z/
Worcester MA-Hampshire MA-Franklin MA-
600 PM EDT Wed May 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHWESTERN WORCESTER...CENTRAL HAMPSHIRE AND FRANKLIN
COUNTIES...
At 559 PM EDT, severe thunderstorms were located along a line
extending from near Northfield to near Whately, moving east at 40
mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Amherst, Northampton, Greenfield, Orange, Deerfield, Belchertown,
Athol, Winchendon, Ware, Montague, Templeton, Hadley, Sunderland,
Hatfield, Northfield, Hardwick, Williamsburg, Huntington, Bernardston
and Conway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4259 7269 4273 7261 4271 7203 4231 7226
4235 7306 4238 7299
TIME...MOT...LOC 2159Z 270DEG 35KT 4271 7242 4240 7266
HAIL...<.75IN
WIND...60MPH
$$
BL459
WWUS51 KBOX 262208
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
608 PM EDT Wed May 26 2021
MAC011-015-027-262245-
/O.CON.KBOX.SV.W.0002.000000T0000Z-210526T2245Z/
Worcester MA-Hampshire MA-Franklin MA-
608 PM EDT Wed May 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHWESTERN WORCESTER...CENTRAL HAMPSHIRE AND FRANKLIN
COUNTIES...
At 608 PM EDT, severe thunderstorms were located along a line
extending from near Warwick to near Hatfield, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Law enforcement reported trees down on a county road in
Huntington.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Amherst, Northampton, Greenfield, Orange, Deerfield, Belchertown,
Athol, Winchendon, Ware, Montague, Templeton, Hadley, Sunderland,
Hatfield, Northfield, Hardwick, Williamsburg, Huntington, Bernardston
and Conway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4251 7280 4273 7249 4271 7203 4231 7226
4235 7306 4238 7299
TIME...MOT...LOC 2207Z 263DEG 31KT 4272 7233 4241 7257
HAIL...<.75IN
WIND...60MPH
$$
BL616
WWUS51 KBOX 262229
SVSBOX
Severe Weather Statement
National Weather Service Boston/Norton MA
629 PM EDT Wed May 26 2021
MAC011-015-027-262245-
/O.CON.KBOX.SV.W.0002.000000T0000Z-210526T2245Z/
Worcester MA-Hampshire MA-Franklin MA-
629 PM EDT Wed May 26 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTHWESTERN WORCESTER...EAST CENTRAL HAMPSHIRE AND SOUTHEASTERN
FRANKLIN COUNTIES...
At 628 PM EDT, severe thunderstorms were located along a line
extending from near Royalston to near Pelham, moving east at 35 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Amherst, Northampton, Orange, Belchertown, Athol, Winchendon, Ware,
Templeton, Hadley, Sunderland, Hatfield, Hardwick, Williamsburg,
Leverett, Shutesbury, Phillipston, Westhampton, Pelham, Royalston and
Petersham.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4247 7248 4272 7226 4271 7203 4231 7226
4234 7277 4239 7265
TIME...MOT...LOC 2228Z 277DEG 31KT 4263 7219 4232 7243
HAIL...<.75IN
WIND...60MPH
$$
BLThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 25, 10:05 PM EDT | Small Craft Advisory | BOX | 12 hr | |
| May 26, 9:51 AM EDT | Small Craft Advisory | BOX | 21 hr | |
| May 26, 5:03 PM EDT | Special Weather Statement | BOX | Franklin | 27 min |
| May 26, 5:30 PM EDT | Special Weather Statement | BOX | Franklin | 45 min |
| May 26, 6:13 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Middlesex, Worcester | 62 min |
| May 26, 6:39 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampden, Hampshire, Worcester | 66 min |
| May 26, 7:05 PM EDT | Severe Thunderstorm Warning | BOX | Hampden | 55 min |
| May 26, 7:15 PM EDT | Special Weather Statement | BOX | Essex, Middlesex | 45 min |
| May 26, 7:21 PM EDT | Special Marine Warning | BOX | 54 min | |
| May 26, 7:45 PM EDT | Severe Thunderstorm Warning | BOX | Hampden, Hampshire, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.