Alert archive / Massachusetts / Tornado Warnings in 2014

Tornado Warning 7, NWS Boston/Norton, MA

September 6, 2014Franklin County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this tornado warning at Sep 6, 2014, 4:22 PM EDT for Franklin County, Worcester County, Massachusetts. It was in force for 24 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: Sep 6, 2014, 4:22 PM EDT (20:22 UTC)
Expired: Sep 6, 2014, 4:46 PM EDT
In force: 24 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Franklin County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 113 km from the middle of the area, began a volume at 20:22 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
Sep 6, 4:26 PM EDT	TSTM WND DMG	Warwick, MA	TREE DOWN ON WENDELL ROAD

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Sep 6, 1:22 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.4 hours before the alert went out and 140 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: 685 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 619 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 81 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

409 
WFUS51 KBOX 062022
TORBOX
MAC011-027-062100-
/O.NEW.KBOX.TO.W.0007.140906T2022Z-140906T2100Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
422 PM EDT SAT SEP 6 2014

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  NORTHWESTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 500 PM EDT
    
* AT 421 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  OVER WARWICK...AND WAS MOVING EAST AT 30 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  ORANGE...GARDNER...ATHOL...WINCHENDON...TEMPLETON...WESTMINSTER...
  ASHBURNHAM...NORTHFIELD...ERVING...PHILLIPSTON...ROYALSTON AND
  WARWICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! DO NOT WAIT TO SEE THE TORNADO. GO TO A BASEMENT OR
INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING...AWAY FROM
WINDOWS. IF IN A VEHICLE...A MOBILE HOME OR OUTDOORS...GET TO THE
CLOSEST SHELTER. PROTECT YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4271 7190 4257 7190 4263 7244 4270 7243
TIME...MOT...LOC 2021Z 274DEG 28KT 4266 7235 
$$

JWD

2 follow-up statements

082 
WWUS51 KBOX 062035
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
435 PM EDT SAT SEP 6 2014

MAC011-027-062100-
/O.CON.KBOX.TO.W.0007.000000T0000Z-140906T2100Z/
FRANKLIN MA-WORCESTER MA-
435 PM EDT SAT SEP 6 2014

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 500 PM EDT FOR EASTERN
FRANKLIN AND NORTHWESTERN WORCESTER COUNTIES...
    
AT 435 PM...THERE HAS BEEN NO CONFIRMATION OF A TORNADO.

DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A 
TORNADO. THIS DANGEROUS STORM WAS LOCATED OVER ROYALSTON...OR NEAR 
ORANGE...MOVING EAST AT 30 MPH.

LOCATIONS IMPACTED INCLUDE...
ORANGE...GARDNER...ATHOL...WINCHENDON...TEMPLETON...WESTMINSTER...
ASHBURNHAM...PHILLIPSTON...ROYALSTON AND WARWICK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! LEAVE MOBILE HOMES AND GO TO A STRONG BUILDING. GO TO
THE BASEMENT OR AN INTERIOR ROOM ON THE LOWEST FLOOR. STAY AWAY FROM
WINDOWS.

&&

LAT...LON 4261 7230 4269 7228 4269 7190 4257 7190
TIME...MOT...LOC 2035Z 274DEG 28KT 4265 7220 

$$

JWD

082 
WWUS51 KBOX 062046
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
446 PM EDT SAT SEP 6 2014

MAC011-027-062056-
/O.CAN.KBOX.TO.W.0007.000000T0000Z-140906T2100Z/
FRANKLIN MA-WORCESTER MA-
446 PM EDT SAT SEP 6 2014

...THE TORNADO WARNING FOR EASTERN FRANKLIN AND NORTHWESTERN
WORCESTER COUNTIES IS CANCELED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS TO BE CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN CANCELED.

HOWEVER...STRONG WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS 
THUNDERSTORM.

&&

LAT...LON 4261 7230 4269 7228 4269 7190 4257 7190
TIME...MOT...LOC 2043Z 274DEG 28KT 4264 7208 

$$

JWD

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 6:19 AM EDT	Small Craft Advisory	BOX		13 hr
Sep 6, 3:08 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	31 min
Sep 6, 3:35 PM EDT	Special Weather Statement	BOX	Franklin	40 min
Sep 6, 3:38 PM EDT	Special Weather Statement	BOX	Worcester	52 min
Sep 6, 3:48 PM EDT	Special Weather Statement	BOX	Essex	27 min
Sep 6, 3:52 PM EDT	Special Marine Warning	BOX		53 min
Sep 6, 4:00 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Worcester	60 min
Sep 6, 4:18 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	57 min
Sep 6, 4:29 PM EDT	Tornado Warning	BOX	Essex, Middlesex	31 min
Sep 6, 4:59 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	61 min
Sep 6, 5:00 PM EDT	Special Marine Warning	BOX		60 min
Sep 6, 5:03 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	42 min
Sep 6, 5:36 PM EDT	Special Weather Statement	BOX	Essex, Middlesex, Norfolk, Worcester	84 min
Sep 6, 5:43 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampshire, Worcester	26 min
Sep 6, 5:50 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	40 min
Sep 6, 5:55 PM EDT	Special Marine Warning	BOX		65 min
Sep 6, 6:01 PM EDT	Special Weather Statement	BOX	Worcester	44 min
Sep 6, 6:02 PM EDT	Special Weather Statement	BOX	Suffolk	43 min
Sep 6, 6:06 PM EDT	Special Marine Warning	BOX		54 min
Sep 6, 6:08 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex, Norfolk, Suffolk	112 min
Sep 6, 6:25 PM EDT	Special Weather Statement	BOX	Middlesex	50 min
Sep 6, 7:38 PM EDT	Special Weather Statement	BOX	Plymouth	52 min

Nearby

Tornado Warnings in Massachusetts, 2014 Every tornado warning in 2014 Tornadoes 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.