Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 3, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 18, 2017, 8:36 PM EDT for Franklin County, Hampshire County, Massachusetts. It was in force for 39 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
- May 18, 2017, 8:36 PM EDT (00:36 UTC)
- Expired
- May 18, 2017, 9:15 PM EDT
- In force
- 39 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
The radar
The Albany radar (KENX), 98 km from the middle of the area, began a volume at 00:39 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
Albany, NY (KALY), launched 00:00Z, 0.6 hours before the alert went out and 79 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.
349
WUUS51 KBOX 190036
SVRBOX
MAC011-015-190115-
/O.NEW.KBOX.SV.W.0003.170519T0036Z-170519T0115Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Taunton MA
836 PM EDT THU MAY 18 2017
The National Weather Service in Taunton has issued a
* Severe Thunderstorm Warning for...
Northwestern Hampshire County in western Massachusetts...
Northwestern Franklin County in western Massachusetts...
* Until 915 PM EDT
* At 836 PM EDT, a severe thunderstorm was located over Williamstown,
or over North Adams, moving southeast at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to trees and power lines.
* Locations impacted include...
Northampton, Greenfield, Deerfield, Monroe, Montague, Hatfield,
Williamsburg, Bernardston, Buckland, Conway, Shelburne, Ashfield,
Colrain, Whately, Charlemont, Chesterfield, Goshen, Cummington,
Leyden and Heath.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 4273 7252 4235 7265 4248 7298 4266 7295
4267 7296 4266 7298 4267 7300 4270 7295
4270 7302 4274 7302
TIME...MOT...LOC 0036Z 293DEG 40KT 4270 7316
HAIL...<.75IN
WIND...60MPH
$$
LECThe office that day
Everything else NWS Boston/Norton, MA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 9:05 PM EDT | Severe Thunderstorm Warning | BOX | Franklin, Hampshire, Worcester | 55 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.