Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2017
Severe Thunderstorm Warning 6, NWS Boston/Norton, MA
NWS Boston/Norton, MA issued this severe thunderstorm warning at May 18, 2017, 11:45 PM EDT for Middlesex County, Worcester County, Massachusetts. It was in force for 30 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, 11:45 PM EDT (03:45 UTC)
- Expired
- May 19, 2017, 12:15 AM EDT
- In force
- 30 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), 63 km from the middle of the area, began a volume at 03:47 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
Chatham, MA (KCHH), launched 00:00Z, 3.8 hours before the alert went out and 164 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2123 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
845 WUUS51 KBOX 190345 SVRBOX MAC017-027-190415- /O.NEW.KBOX.SV.W.0006.170519T0345Z-170519T0415Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Warning National Weather Service Taunton MA 1145 PM EDT THU MAY 18 2017 The National Weather Service in Taunton has issued a * Severe Thunderstorm Warning for... Southeastern Worcester County in central Massachusetts... South central Middlesex County in northeastern Massachusetts... * Until 1215 AM EDT * At 1144 PM EDT, a severe thunderstorm was located over Paxton, or near Worcester, moving east at 35 mph. HAZARD...60 mph wind gusts. SOURCE...Radar indicated. IMPACT...Expect damage to trees and power lines. * Locations impacted include... Worcester, Marlborough, Shrewsbury, Milford, Hudson, Westborough, Grafton, Holden, Auburn, Northbridge, Hopkinton, Northborough, Oxford, Clinton, Millbury, Charlton, Spencer, Leicester, Southborough and Sutton. PRECAUTIONARY/PREPAREDNESS ACTIONS... For your protection move to an interior room on the lowest floor of a building. && LAT...LON 4214 7196 4235 7201 4249 7150 4213 7155 TIME...MOT...LOC 0344Z 255DEG 32KT 4228 7193 HAIL...<.75IN WIND...60MPH $$ LEC
The 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, 9:05 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 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.