Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 28, NWS Boston/Norton, MA

June 27, 2017Hampden County, Hampshire County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 27, 2017, 2:49 PM EDT for Hampden County, Hampshire County, Worcester County, Massachusetts. It was in force for 41 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, 2:49 PM EDT (18:49 UTC)
Expired: Jun 27, 2017, 3:30 PM EDT
In force: 41 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hampden County, MA, Hampshire County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 108 km from the middle of the area, began a volume at 18:49 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
Jun 27, 2:52 PM EDT	HAIL 0.75	West Springfield, MA
Jun 27, 2:53 PM EDT	HAIL 0.9	Longmeadow, MA	NICKEL SIZE HAIL ON ROUTE 5
Jun 27, 2:53 PM EDT	HAIL 0.9	Longmeadow, MA
Jun 27, 3:00 PM EDT	HAIL 0.9	Springfield, MA
Jun 27, 3:05 PM EDT	HAIL 0.9	Wilbraham, MA
Jun 27, 3:15 PM EDT	HAIL 1	Springfield, MA
Jun 27, 3:20 PM EDT	HAIL 0.9	Wilbraham, MA

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 12:00Z, 6.8 hours before the alert went out and 130 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: 2 J/kg
Mixed-layer CIN: -159 J/kg
Mixed-layer LCL: 1178 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 199 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

005 
WUUS51 KBOX 271849
SVRBOX
MAC013-015-027-271930-
/O.NEW.KBOX.SV.W.0028.170627T1849Z-170627T1930Z/

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

The National Weather Service in Taunton has issued a

* Severe Thunderstorm Warning for...
  Southwestern Worcester County in central Massachusetts...
  Southeastern Hampshire County in western Massachusetts...
  Southeastern Hampden County in western Massachusetts...

* Until 330 PM EDT

* At 248 PM EDT, a severe thunderstorm was located over Agawam,
  moving northeast at 30 mph.

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

  SOURCE...Radar indicated. Spotters have reported up to three 
           quarter inch hail

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

* Locations impacted include...
  Springfield, Chicopee, Westfield, Holyoke, Agawam, West
  Springfield, Ludlow, Longmeadow, East Longmeadow, Belchertown,
  Wilbraham, Charlton, Palmer, Ware, Sturbridge, Monson, Granby,
  Hampden, Warren and North Brookfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows!

&&

LAT...LON 4238 7219 4212 7201 4203 7264 4203 7265
      4213 7275
TIME...MOT...LOC 1848Z 243DEG 25KT 4209 7261 

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

md

2 follow-up statements

572 
WWUS51 KBOX 271908
SVSBOX

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

MAC013-015-027-271930-
/O.CON.KBOX.SV.W.0028.000000T0000Z-170627T1930Z/
Worcester MA-Hampshire MA-Hampden MA-
308 PM EDT TUE JUN 27 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHWESTERN WORCESTER...SOUTHEASTERN HAMPSHIRE AND SOUTHEASTERN
HAMPDEN COUNTIES...

At 307 PM EDT, a severe thunderstorm was located over Wilbraham, or
near Springfield, moving northeast at 30 mph.

HAZARD...Quarter size hail. 

SOURCE...Radar indicated. Spotters have reported hail up to three 
         quarters of an inch. 

IMPACT...Damage to vehicles is possible. 

Locations impacted include...
Springfield, Chicopee, Agawam, West Springfield, Ludlow, Longmeadow,
East Longmeadow, Belchertown, Wilbraham, Charlton, Palmer, Ware,
Sturbridge, Monson, Granby, Hampden, Warren, North Brookfield, West
Brookfield and Brimfield.

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 4238 7219 4212 7201 4205 7251 4203 7264
      4222 7255
TIME...MOT...LOC 1907Z 243DEG 25KT 4215 7245 

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

md

663 
WWUS51 KBOX 271924
SVSBOX

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

MAC013-015-027-271934-
/O.EXP.KBOX.SV.W.0028.000000T0000Z-170627T1930Z/
Worcester MA-Hampshire MA-Hampden MA-
324 PM EDT TUE JUN 27 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN WORCESTER...
SOUTHEASTERN HAMPSHIRE AND SOUTHEASTERN HAMPDEN COUNTIES WILL EXPIRE
AT 330 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 4238 7219 4212 7201 4205 7251 4203 7264
      4222 7255
TIME...MOT...LOC 1924Z 243DEG 25KT 4220 7231 

$$

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, 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, 3:39 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	51 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.