Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 2, NWS Boston/Norton, MA

May 25, 2014Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 25, 2014, 1:42 PM EDT for Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It was in force for 33 min. 4 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: May 25, 2014, 1:42 PM EDT (17:42 UTC)
Expired: May 25, 2014, 2:15 PM EDT
In force: 33 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Northeastern Connecticut Planning Region, CT, Worcester County, MA

The radar

The Boston radar (KBOX), 62 km from the middle of the area, began a volume at 17:43 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 25, 1:43 PM EDT	HAIL 0.88	Leicester, MA	NICKEL SIZE HAIL.
May 25, 1:50 PM EDT	HAIL 1	Leicester, MA	QUARTER SIZE HAIL
May 25, 2:06 PM EDT	HAIL 1	Charlton, MA	QUARTER SIZE HAIL REPORTED AT CHARLTON SERVICE AREA ON MASS PIKE.
May 25, 2:20 PM EDT	HAIL 0.75	Spencer, MA	DIME SIZE HAIL REPORTED.

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

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 5.7 hours before the alert went out and 163 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: 10 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1127 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 59 m²/s²
0-3 km storm-relative helicity: 77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

264 
WUUS51 KBOX 251742
SVRBOX
CTC015-MAC027-251815-
/O.NEW.KBOX.SV.W.0002.140525T1742Z-140525T1815Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
142 PM EDT SUN MAY 25 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  SOUTH CENTRAL WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 215 PM EDT

* AT 141 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER
  LEICESTER...OR NEAR WORCESTER...AND WAS MOVING SOUTH AT 20 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  WORCESTER...SHREWSBURY...GRAFTON...HOLDEN...WEBSTER...AUBURN...
  NORTHBRIDGE...OXFORD...UXBRIDGE...MILLBURY...CHARLTON...SPENCER...
  DUDLEY...LEICESTER...THOMPSON...SUTTON...DOUGLAS...WOODSTOCK...WEST
  BOYLSTON AND PAXTON.

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.

&&

LAT...LON 4230 7203 4235 7179 4204 7161 4201 7177
      4201 7180 4200 7180 4197 7196
TIME...MOT...LOC 1741Z 344DEG 19KT 4225 7189 
$$

RLG

1 follow-up statement

324 
WWUS51 KBOX 251808
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
208 PM EDT SUN MAY 25 2014

CTC015-MAC027-251815-
/O.CON.KBOX.SV.W.0002.000000T0000Z-140525T1815Z/
WINDHAM CT-WORCESTER MA-
208 PM EDT SUN MAY 25 2014

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 PM EDT
FOR NORTHEASTERN WINDHAM AND SOUTH CENTRAL WORCESTER COUNTIES...

AT 207 PM EDT...TRAINED WEATHER SPOTTERS REPORTED A SEVERE 
THUNDERSTORM PRODUCING QUARTER SIZE HAIL IN LEICESTER AND CHARLTON. 
THIS STORM WAS LOCATED OVER CHARLTON...OR 10 MILES SOUTHWEST OF 
WORCESTER...MOVING SOUTH AT 35 MPH.

LOCATIONS IMPACTED INCLUDE...
WORCESTER...SHREWSBURY...GRAFTON...HOLDEN...WEBSTER...AUBURN...
NORTHBRIDGE...OXFORD...UXBRIDGE...MILLBURY...CHARLTON...SPENCER...
DUDLEY...LEICESTER...THOMPSON...SUTTON...DOUGLAS...WOODSTOCK...WEST
BOYLSTON AND PAXTON.

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.

&&

LAT...LON 4230 7203 4235 7179 4204 7161 4201 7177
      4201 7180 4200 7180 4197 7196
TIME...MOT...LOC 1807Z 356DEG 29KT 4214 7192 

$$

RLG

The office that day

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

Issued	Product	Office	Counties	Lasted
May 25, 1:07 PM EDT	Special Weather Statement	BOX	Worcester	83 min
May 25, 2:15 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	30 min
May 25, 3:03 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	27 min
May 25, 3:25 PM EDT	Special Marine Warning	BOX		95 min
May 25, 4:45 PM EDT	Small Craft Advisory	BOX		37 hr
May 25, 6:30 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	30 min
May 25, 6:57 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	48 min
May 25, 7:40 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Norfolk, Worcester	50 min
May 25, 2:37 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	38 min
May 25, 2:43 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	47 min
May 25, 3:32 PM EDT	Special Weather Statement	BOX		28 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2014 Severe Thunderstorm Warnings in Connecticut, 2014 Every severe thunderstorm warning in 2014

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.