Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 2, NWS Boston/Norton, MA

May 19, 2015Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 19, 2015, 8:45 PM EDT for Hampden County, Hampshire County, Massachusetts. It was in force for 45 min. 1 report 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 19, 2015, 8:45 PM EDT (00:45 UTC)
Expired: May 19, 2015, 9:30 PM EDT
In force: 45 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 99 km from the middle of the area, began a volume at 00:47 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.

What was reported inside it

Time	Report	Where	Remark
May 19, 8:50 PM EDT	TSTM WND DMG	Huntington, MA	SEVERAL LARGE TREES DOWN OFF OF COUNTY ROAD.

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, 0.8 hours before the alert went out and 88 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1268 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: -68 m²/s²
0-3 km storm-relative helicity: 130 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

956 
WUUS51 KBOX 200045
SVRBOX
MAC013-015-200130-
/O.NEW.KBOX.SV.W.0002.150520T0045Z-150520T0130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
845 PM EDT TUE MAY 19 2015

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...
  WESTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 930 PM EDT

* AT 844 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM
  WAS LOCATED NEAR BLANDFORD...OR 12 MILES NORTHWEST OF WESTFIELD...
  AND WAS MOVING SOUTHEAST AT 35 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  SPRINGFIELD...CHICOPEE...WESTFIELD...HOLYOKE...NORTHAMPTON...
  AGAWAM...WEST SPRINGFIELD...LUDLOW...SOUTH HADLEY...EASTHAMPTON...
  SOUTHWICK...GRANBY...SOUTHAMPTON...HUNTINGTON...RUSSELL...
  WESTHAMPTON...GRANVILLE...CHESTER...BLANDFORD AND CHESTERFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO
INDOORS AND STAY AWAY FROM WINDOWS.  DRIVERS SHOULD PREPARE FOR LOW
VISIBILITY AND AVOID FLOODED ROADS.

THIS IS A VERY DANGEROUS SITUATION. THIS STORM HAS A HISTORY OF
PRODUCING WIND DAMAGE. GO INSIDE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4215 7307 4215 7303 4227 7300 4231 7300
      4231 7303 4233 7306 4238 7307 4238 7301
      4242 7300 4221 7249 4203 7263 4206 7287
      4213 7306
TIME...MOT...LOC 0044Z 296DEG 29KT 4223 7297 
$$

MD

2 follow-up statements

504 
WWUS51 KBOX 200113
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
913 PM EDT TUE MAY 19 2015

MAC013-015-200130-
/O.CON.KBOX.SV.W.0002.000000T0000Z-150520T0130Z/
HAMPSHIRE MA-HAMPDEN MA-
913 PM EDT TUE MAY 19 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR SOUTHWESTERN HAMPSHIRE AND WESTERN HAMPDEN COUNTIES...

AT 912 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED OVER WEST SPRINGFIELD...MOVING SOUTHEAST AT 35 MPH.

IN ADDITION...PEA SIZED HAIL WAS REPORTED AT BLANDFORD WITH THIS 
STORM.

LOCATIONS IMPACTED INCLUDE...
SPRINGFIELD...CHICOPEE...WESTFIELD...HOLYOKE...NORTHAMPTON...
AGAWAM...WEST SPRINGFIELD...LUDLOW...SOUTH HADLEY...EASTHAMPTON...
SOUTHWICK...GRANBY...SOUTHAMPTON...HUNTINGTON...RUSSELL...
WESTHAMPTON...GRANVILLE...CHESTER...BLANDFORD AND CHESTERFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND DESTRUCTIVE HAIL. GO
INSIDE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR
BUSINESS. DRIVERS SHOULD EXPECT POOR VISIBILITY AND AVOID FLOODED
ROADS.

THIS IS A VERY DANGEROUS SITUATION! THIS STORM HAS A HISTORY OF
PRODUCING WIND DAMAGE. MOVE INSIDE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4209 7294 4211 7294 4222 7292 4227 7289
      4236 7286 4221 7249 4203 7263 4206 7287
      4209 7293
TIME...MOT...LOC 0112Z 296DEG 29KT 4213 7269 

$$

MD

458 
WWUS51 KBOX 200129
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
929 PM EDT TUE MAY 19 2015

MAC013-015-200139-
/O.EXP.KBOX.SV.W.0002.000000T0000Z-150520T0130Z/
HAMPSHIRE MA-HAMPDEN MA-
929 PM EDT TUE MAY 19 2015

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN HAMPSHIRE AND
WESTERN HAMPDEN COUNTIES WILL EXPIRE AT 930 PM EDT...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HAS WEAKENED 
THEREFORE THE WARNING WILL BE ALLOWED TO EXPIRE.

LAT...LON 4209 7294 4211 7294 4222 7292 4227 7289
      4236 7286 4221 7249 4203 7263 4206 7287
      4209 7293
TIME...MOT...LOC 0128Z 296DEG 29KT 4213 7269 

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
May 19, 8:31 PM EDT	Special Weather Statement	BOX	Hampshire	44 min
May 19, 9:31 PM EDT	Special Weather Statement	BOX	Hampden	44 min
May 20, 2:15 PM EDT	Small Craft Advisory	BOX		5 hr
May 20, 2:15 PM EDT	Small Craft Advisory	BOX		3 min
May 20, 2:27 PM EDT	Frost Advisory	BOX	Franklin, Hampden, Hampshire	16 hr

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2015 Every severe thunderstorm warning in 2015

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.