Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 4, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 18, 2017, 9:05 PM EDT for Franklin County, Hampshire County, Worcester County, Massachusetts. It was in force for 55 min. 3 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 18, 2017, 9:05 PM EDT (01:05 UTC)
- Expired
- May 18, 2017, 10:00 PM EDT
- In force
- 55 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), 123 km from the middle of the area, began a volume at 01:03 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 18, 9:20 PM EDT | TSTM WND DMG | Sunderland, MA | TREE DOWN ON HUBBARD HILL ROAD. ROAD BLOCKED. |
| May 18, 9:20 PM EDT | TSTM WND DMG | Sunderland, MA | TREE DOWN ON WIRES ON 500 BLOCK OF RIVER ROAD. |
| May 18, 9:55 PM EDT | TSTM WND DMG | Templeton, MA | TREES DOWN IN A FEW LOCATIONS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Albany, NY (KALY), launched 00:00Z, 1.1 hours before the alert went out and 105 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
- 369 J/kg
- Mixed-layer CIN
- -36 J/kg
- Mixed-layer LCL
- 2727 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 70 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted.
145
WUUS51 KBOX 190105
SVRBOX
MAC011-015-027-190200-
/O.NEW.KBOX.SV.W.0004.170519T0105Z-170519T0200Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Taunton MA
905 PM EDT THU MAY 18 2017
The National Weather Service in Taunton 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 1000 PM EDT
* At 905 PM EDT, a severe thunderstorm was located near Ashfield, or
13 miles west of Greenfield, moving east at 45 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Amherst, Greenfield, Orange, Deerfield, Gardner, Belchertown,
Spencer, Athol, Winchendon, Ware, Montague, Templeton, Rutland,
Westminster, Ashburnham, Barre, Hadley, North Brookfield,
Hubbardston and Sunderland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4274 7289 4271 7192 4229 7201 4239 7273
4247 7294
TIME...MOT...LOC 0105Z 261DEG 40KT 4256 7284
HAIL...0.75IN
WIND...60MPH
$$
LEC2 follow-up statements
175
WWUS51 KBOX 190129
SVSBOX
Severe Weather Statement
National Weather Service Taunton MA
929 PM EDT THU MAY 18 2017
MAC015-190139-
/O.CAN.KBOX.SV.W.0004.000000T0000Z-170519T0200Z/
Hampshire MA-
929 PM EDT THU MAY 18 2017
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL HAMPSHIRE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has weakened.
moved out of the warned area. Therefore, the warning has been
cancelled.
LAT...LON 4271 7192 4235 7200 4240 7237 4242 7238
4241 7243 4242 7249 4243 7249 4243 7253
4246 7273 4273 7261
TIME...MOT...LOC 0129Z 267DEG 36KT 4254 7256
$$
MAC011-027-190200-
/O.CON.KBOX.SV.W.0004.000000T0000Z-170519T0200Z/
Worcester MA-Franklin MA-
929 PM EDT THU MAY 18 2017
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT
FOR NORTHWESTERN WORCESTER AND NORTHEASTERN FRANKLIN COUNTIES...
At 929 PM EDT, a severe thunderstorm was located over Montague, or
near Greenfield, moving east at 40 mph.
HAZARD...60 mph wind gusts and penny size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
Locations impacted include...
Amherst, Greenfield, Orange, Deerfield, Gardner, Athol, Winchendon,
Montague, Templeton, Rutland, Westminster, Ashburnham, Barre,
Hubbardston, Sunderland, Northfield, Hardwick, Bernardston, Oakham
and Conway.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4271 7192 4235 7200 4240 7237 4242 7238
4241 7243 4242 7249 4243 7249 4243 7253
4246 7273 4273 7261
TIME...MOT...LOC 0129Z 267DEG 36KT 4254 7256
HAIL...0.75IN
WIND...60MPH
$$
LEC571
WWUS51 KBOX 190156
SVSBOX
Severe Weather Statement
National Weather Service Taunton MA
956 PM EDT THU MAY 18 2017
MAC011-027-190206-
/O.EXP.KBOX.SV.W.0004.000000T0000Z-170519T0200Z/
Worcester MA-Franklin MA-
956 PM EDT THU MAY 18 2017
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN WORCESTER AND
NORTHEASTERN FRANKLIN COUNTIES WILL EXPIRE AT 1000 PM EDT...
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire. However gusty winds
are still possible with this thunderstorm.
&&
LAT...LON 4271 7192 4235 7200 4240 7237 4242 7238
4241 7243 4242 7249 4243 7249 4243 7253
4246 7273 4273 7261
TIME...MOT...LOC 0156Z 271DEG 47KT 4256 7216
$$
LECThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 8:36 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire | 39 min |
| May 18, 9:43 PM EDT | Severe Thunderstorm Warning | BOX | Essex, Middlesex, Worcester | 62 min |
| May 18, 10:14 PM EDT | Special Weather Statement | BOX | Hampshire, Middlesex, Worcester | 61 min |
| May 18, 10:20 PM EDT | Special Marine Warning | BOX | 55 min | |
| May 18, 10:41 PM EDT | Special Weather Statement | BOX | Essex, Norfolk, Suffolk | 49 min |
| May 18, 11:45 PM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Worcester | 30 min |
| May 19, 12:04 AM EDT | Severe Thunderstorm Warning | BOX | Middlesex, Norfolk, Suffolk, Worcester | 27 min |
| May 19, 12:08 AM EDT | Special Marine Warning | BOX | 97 min |
Nearby
Severe Thunderstorm Warnings in Massachusetts, 2017Every severe thunderstorm warning in 2017
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.