Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 29, NWS Boston/Norton, MA

June 27, 2017Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 27, 2017, 3:39 PM EDT for Worcester County, Massachusetts. It was in force for 51 min. 7 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: Jun 27, 2017, 3:39 PM EDT (19:39 UTC)
Expired: Jun 27, 2017, 4:30 PM EDT
In force: 51 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Worcester County, MA

The radar

The Boston radar (KBOX), 65 km from the middle of the area, began a volume at 19:38 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
Jun 27, 3:56 PM EDT	HAIL 0.9	Spencer, MA
Jun 27, 3:58 PM EDT	HAIL 0.9	Spencer, MA	HAIL COVERING GROUND
Jun 27, 4:00 PM EDT	HAIL 1	Leicester, MA
Jun 27, 4:01 PM EDT	HAIL 1.25	Leicester, MA
Jun 27, 4:10 PM EDT	HAIL 0.9	Clinton, MA
Jun 27, 4:18 PM EDT	HAIL 0.9	Worcester, MA
Jun 27, 4:28 PM EDT	TSTM WND DMG	Boylston, MA	LARGE LIMB DOWN ON MAIN STREET

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 7.7 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 25 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1383 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: -16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

755 
WUUS51 KBOX 271939
SVRBOX
MAC027-272030-
/O.NEW.KBOX.SV.W.0029.170627T1939Z-170627T2030Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Taunton MA
339 PM EDT TUE JUN 27 2017

The National Weather Service in Taunton has issued a

* Severe Thunderstorm Warning for...
  Central Worcester County in central Massachusetts...

* Until 430 PM EDT

* At 338 PM EDT, a severe thunderstorm was located over Brookfield,
  or 16 miles west of Worcester, moving northeast at 30 mph.

  HAZARD...Quarter size hail. 

  SOURCE...Radar indicated. 

  IMPACT...Damage to vehicles is possible. 

* Locations impacted include...
  Worcester, Leominster, Marlborough, Shrewsbury, Hudson,
  Westborough, Holden, Auburn, Northborough, Clinton, Charlton,
  Spencer, Leicester, Southborough, Sturbridge, Lancaster, Rutland,
  Sterling, West Boylston and Warren.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 4241 7159 4240 7160 4239 7158 4235 7163
      4231 7159 4233 7155 4233 7152 4232 7151
      4212 7213 4216 7213 4216 7218 4222 7222
      4254 7171
TIME...MOT...LOC 1938Z 234DEG 27KT 4218 7211 

HAIL...1.00IN
WIND...<50MPH
 
$$

md

4 follow-up statements

261 
WWUS51 KBOX 271949
SVSBOX

Severe Weather Statement
National Weather Service Taunton MA
349 PM EDT TUE JUN 27 2017

MAC027-272030-
/O.CON.KBOX.SV.W.0029.000000T0000Z-170627T2030Z/
Worcester MA-
349 PM EDT TUE JUN 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CENTRAL WORCESTER COUNTY...

At 349 PM EDT, a severe thunderstorm was located over East
Brookfield, or 11 miles west of Worcester, moving northeast at 30
mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Hail damage to vehicles is possible. Expect damage to trees 
         and power lines. 

Locations impacted include...
Worcester, Leominster, Marlborough, Shrewsbury, Hudson, Westborough,
Holden, Auburn, Northborough, Clinton, Charlton, Spencer, Leicester,
Southborough, Sturbridge, Lancaster, Rutland, Sterling, West Boylston
and Warren.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

&&

LAT...LON 4241 7159 4240 7160 4239 7158 4235 7163
      4231 7159 4233 7155 4233 7152 4232 7151
      4212 7213 4216 7213 4216 7218 4222 7222
      4254 7171
TIME...MOT...LOC 1949Z 234DEG 27KT 4223 7202 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

md

613 
WWUS51 KBOX 272003
SVSBOX

Severe Weather Statement
National Weather Service Taunton MA
403 PM EDT TUE JUN 27 2017

MAC027-272030-
/O.CON.KBOX.SV.W.0029.000000T0000Z-170627T2030Z/
Worcester MA-
403 PM EDT TUE JUN 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR CENTRAL WORCESTER COUNTY...

At 402 PM EDT, a severe thunderstorm was located over Paxton, or near
Worcester, moving northeast at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Trained weather spotters report hail up to one inch. 

IMPACT...Hail damage to vehicles is possible. Expect damage to trees 
         and power lines. 

Locations impacted include...
Worcester, Leominster, Marlborough, Shrewsbury, Hudson, Westborough,
Holden, Auburn, Northborough, Clinton, Charlton, Spencer, Leicester,
Southborough, Lancaster, Rutland, Sterling, West Boylston, Bolton and
Paxton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 4241 7159 4240 7160 4239 7158 4235 7163
      4231 7159 4233 7155 4233 7152 4232 7151
      4217 7199 4221 7204 4224 7204 4229 7207
      4254 7171
TIME...MOT...LOC 2002Z 234DEG 27KT 4229 7191 

TORNADO...POSSIBLE
HAIL...1.00IN
WIND...60MPH
 
$$

md

682 
WWUS51 KBOX 272017
SVSBOX

Severe Weather Statement
National Weather Service Taunton MA
417 PM EDT TUE JUN 27 2017

MAC027-272030-
/O.CON.KBOX.SV.W.0029.000000T0000Z-170627T2030Z/
Worcester MA-
417 PM EDT TUE JUN 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM EDT
FOR EAST CENTRAL WORCESTER COUNTY...

At 416 PM EDT, a severe thunderstorm was located over West Boylston,
or near Worcester, moving northeast at 30 mph.

HAZARD...50 mph wind gusts and quarter size hail. 

SOURCE...Trained weather spotters have reported hail up to an inch 
         in diameter. 

IMPACT...Hail damage to vehicles is possible. Expect damage to trees 
         and power lines. 

Locations impacted include...
Worcester, Leominster, Marlborough, Shrewsbury, Hudson, Westborough,
Holden, Auburn, Northborough, Clinton, Leicester, Southborough,
Lancaster, Rutland, Sterling, West Boylston, Bolton, Paxton, Boylston
and Princeton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 4241 7159 4240 7160 4239 7158 4235 7163
      4231 7159 4233 7155 4233 7152 4232 7151
      4221 7185 4224 7188 4229 7194 4237 7194
      4254 7171
TIME...MOT...LOC 2016Z 234DEG 27KT 4236 7179 

HAIL...1.00IN
WIND...60MPH
 
$$

md

618 
WWUS51 KBOX 272026
SVSBOX

Severe Weather Statement
National Weather Service Taunton MA
426 PM EDT TUE JUN 27 2017

MAC027-272036-
/O.EXP.KBOX.SV.W.0029.000000T0000Z-170627T2030Z/
Worcester MA-
426 PM EDT TUE JUN 27 2017

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL WORCESTER COUNTY
WILL EXPIRE AT 430 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However small hail
is still possible with this thunderstorm.

LAT...LON 4241 7159 4240 7160 4239 7158 4235 7163
      4231 7159 4233 7155 4233 7152 4232 7151
      4221 7185 4224 7188 4229 7194 4237 7194
      4254 7171
TIME...MOT...LOC 2026Z 234DEG 27KT 4240 7172 

$$

md

The office that day

Everything else NWS Boston/Norton, MA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 27, 4:03 AM EDT	Small Craft Advisory	BOX		15 hr
Jun 27, 1:40 PM EDT	Special Weather Statement	BOX	Worcester	50 min
Jun 27, 2:03 PM EDT	Special Weather Statement	BOX	Worcester	42 min
Jun 27, 2:07 PM EDT	Special Weather Statement	BOX	Hampden	53 min
Jun 27, 2:22 PM EDT	Special Weather Statement	BOX	Middlesex	53 min
Jun 27, 2:44 PM EDT	Special Weather Statement	BOX	Middlesex	31 min
Jun 27, 2:49 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire, Worcester	41 min
Jun 27, 3:16 PM EDT	Special Weather Statement	BOX	Worcester	59 min
Jun 27, 3:28 PM EDT	Special Weather Statement	BOX	Middlesex	32 min
Jun 27, 3:32 PM EDT	Special Weather Statement	BOX	Hampden	43 min
Jun 27, 3:37 PM EDT	Areal Flood Advisory	BOX	Middlesex, Worcester	113 min
Jun 27, 4:12 PM EDT	Special Weather Statement	BOX	Middlesex	48 min
Jun 27, 4:43 PM EDT	Special Weather Statement	BOX	Essex	47 min
Jun 27, 4:46 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex	29 min
Jun 27, 5:27 PM EDT	Special Weather Statement	BOX	Essex	33 min
Jun 27, 5:41 PM EDT	Special Weather Statement	BOX	Hampshire	49 min
Jun 27, 5:52 PM EDT	Special Marine Warning	BOX		53 min
Jun 27, 6:17 PM EDT	Special Weather Statement	BOX	Hampden	43 min
Jun 27, 6:34 PM EDT	Special Weather Statement	BOX	Franklin, Hampshire	56 min
Jun 27, 6:38 PM EDT	Special Weather Statement	BOX	Suffolk	37 min
Jun 27, 7:10 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	33 min
Jun 27, 7:17 PM EDT	Special Weather Statement	BOX	Worcester	43 min
Jun 27, 7:56 PM EDT	Severe Thunderstorm Warning	BOX	Norfolk, Worcester	49 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2017 Every 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.