Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 88, NWS Boston/Norton, MA

August 12, 2016Hampden County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 12, 2016, 2:51 PM EDT for Hampden County, Worcester County, Massachusetts. It was in force for 39 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
Aug 12, 2016, 2:51 PM EDT (18:51 UTC)
Expired
Aug 12, 2016, 3:30 PM EDT
In force
39 min
Issued by
NWS Boston/Norton, MA
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

Counties Hampden County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 74 km from the middle of the area, began a volume at 18:54 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

TimeReportWhereRemark
Aug 12, 3:15 PM EDTTSTM WND DMGOxford, MATREE AND WIRES DOWN ON WORCESTER ROAD /ROUTE 12/...WIRES DOWN ON OLD SOUTHBRIDGE ROAD

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, 6.9 hours before the alert went out and 162 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-pSkew-T log-p diagram, Brookhaven, NY at 12:00Z on 2016-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1049 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Brookhaven, NY at 12:00Z on 2016-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1049 J/kg
Mixed-layer CIN
-56 J/kg
Mixed-layer LCL
724 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
160 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.8

Open this sounding in Storm Lab

The text

As transmitted.

730 
WUUS51 KBOX 121851
SVRBOX
MAC013-027-121930-
/O.NEW.KBOX.SV.W.0088.160812T1851Z-160812T1930Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
251 PM EDT FRI AUG 12 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EAST CENTRAL HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHWESTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 330 PM EDT

* AT 250 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
  EXTENDING FROM NEAR EAST BROOKFIELD TO NEAR BROOKFIELD TO NEAR
  PALMER...MOVING EAST AT 30 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  GRAFTON...WEBSTER...SOUTHBRIDGE...AUBURN...OXFORD...MILLBURY...
  CHARLTON...PALMER...SPENCER...DUDLEY...LEICESTER...STURBRIDGE...
  SUTTON...DOUGLAS...WARREN...NORTH BROOKFIELD...WEST BROOKFIELD...
  BRIMFIELD...BROOKFIELD AND HOLLAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4219 7170 4213 7172 4203 7189 4204 7217
      4221 7233 4222 7227 4228 7209
TIME...MOT...LOC 1850Z 283DEG 25KT 4222 7208 4220 7214 4220 7227 

HAIL...<.75IN
WIND...60MPH
 
$$

SIPPRELL
1 follow-up statement
877 
WWUS51 KBOX 121902
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
302 PM EDT FRI AUG 12 2016

MAC013-121911-
/O.CAN.KBOX.SV.W.0088.000000T0000Z-160812T1930Z/
HAMPDEN MA-
302 PM EDT FRI AUG 12 2016

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL HAMPDEN COUNTY IS
CANCELLED...

THE STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE WARNED
AREA. THEREFORE...THE WARNING HAS BEEN CANCELLED. THERE REMAINS A
WARNING FOR CENTRAL HAMPDEN COUNTY FOR ANOTHER STORM MOVING INTO THE
SPRINGFIELD METRO AREA. 

LAT...LON 4219 7170 4213 7172 4203 7189 4204 7213
      4216 7213 4216 7216 4218 7216 4226 7204
TIME...MOT...LOC 1901Z 286DEG 22KT 4220 7201 4218 7207 4218 7220 

$$

MAC027-121930-
/O.CON.KBOX.SV.W.0088.000000T0000Z-160812T1930Z/
WORCESTER MA-
302 PM EDT FRI AUG 12 2016

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR SOUTHWESTERN WORCESTER COUNTY...

AT 301 PM EDT...SEVERE THUNDERSTORMS WERE LOCATED ALONG A LINE
EXTENDING FROM EAST BROOKFIELD TO BROOKFIELD TO WARREN...MOVING EAST
AT 25 MPH.

HAZARD...60 MPH WIND GUSTS. 

SOURCE...RADAR INDICATED. 

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

LOCATIONS IMPACTED INCLUDE...
GRAFTON...WEBSTER...SOUTHBRIDGE...AUBURN...OXFORD...MILLBURY...
CHARLTON...SPENCER...DUDLEY...LEICESTER...STURBRIDGE...SUTTON...
DOUGLAS...WARREN...NORTH BROOKFIELD...WEST BROOKFIELD...
BROOKFIELD AND EAST BROOKFIELD.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

INTENSE THUNDERSTORM LINES CAN PRODUCE BRIEF TORNADOES AND
WIDESPREAD SIGNIFICANT WIND DAMAGE. ALTHOUGH A TORNADO IS NOT
IMMEDIATELY LIKELY...IT IS BEST TO MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A BUILDING. THESE STORMS MAY CAUSE SERIOUS INJURY
AND SIGNIFICANT PROPERTY DAMAGE.

TORRENTIAL RAINFALL IS OCCURRING WITH THESE STORMS...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4219 7170 4213 7172 4203 7189 4204 7213
      4216 7213 4216 7216 4218 7216 4226 7204
TIME...MOT...LOC 1901Z 286DEG 22KT 4220 7201 4218 7207 4218 7220 

HAIL...<.75IN
WIND...60MPH
 
$$

SIPPRELL

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 1:54 PM EDTSpecial Weather StatementBOXHampden51 min
Aug 12, 2:22 PM EDTExcessive Heat WarningBOXEssex, Middlesex, Norfolk, Suffolk5 hr
Aug 12, 2:32 PM EDTSpecial Weather StatementBOXHampden, Hampshire43 min
Aug 12, 2:39 PM EDTSpecial Weather StatementBOXWorcester51 min
Aug 12, 2:57 PM EDTSevere Thunderstorm WarningBOXHampden, Hampshire26 min
Aug 12, 3:22 PM EDTSevere Thunderstorm WarningBOXWorcester53 min
Aug 12, 3:56 PM EDTSpecial Weather StatementBOXMiddlesex49 min
Aug 12, 4:28 PM EDTSevere Thunderstorm WarningBOXWorcester47 min
Aug 12, 5:17 PM EDTSevere Thunderstorm WarningBOXFranklin, Hampden, Hampshire43 min
Aug 12, 5:18 PM EDTSevere Thunderstorm WarningBOXBristol42 min
Aug 12, 5:33 PM EDTSpecial Marine WarningBOX57 min
Aug 12, 5:51 PM EDTSevere Thunderstorm WarningBOXBristol54 min
Aug 12, 6:01 PM EDTSpecial Marine WarningBOX59 min
Aug 12, 7:06 PM EDTHeat AdvisoryBOXHampden, Hampshire, Worcester24 hr

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2016Every severe thunderstorm warning in 2016

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.