Alert archive / Massachusetts / Tornado Warnings in 2013

Tornado Warning 10, NWS Boston/Norton, MA

July 10, 2013Hampden County, Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut

NWS Boston/Norton, MA issued this tornado warning at Jul 10, 2013, 5:03 PM EDT for Hampden County, Worcester County, Massachusetts; Northeastern Connecticut Planning Region, Connecticut. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 10, 2013, 5:03 PM EDT (21:03 UTC)
Expired: Jul 10, 2013, 5:30 PM EDT
In force: 27 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

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

The radar

The Boston radar (KBOX), 73 km from the middle of the area, began a volume at 21:06 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.

The nearest sounding before it

Brookhaven, NY (KOKX), launched 12:00Z, 9.1 hours before the alert went out and 150 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: 722 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 814 m above ground
0-6 km bulk shear: 16 kt
0-1 km storm-relative helicity: 55 m²/s²
0-3 km storm-relative helicity: 73 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.

842 
WFUS51 KBOX 102103
TORBOX
CTC013-015-MAC013-027-102130-
/O.NEW.KBOX.TO.W.0010.130710T2103Z-130710T2130Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
503 PM EDT WED JUL 10 2013

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN WINDHAM COUNTY IN NORTHERN CONNECTICUT...
  NORTHEASTERN TOLLAND COUNTY IN NORTHERN CONNECTICUT...
  EXTREME EASTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 530 PM EDT
    
* AT 500 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED
  NEAR UNION...OR 10 MILES NORTHEAST OF MANSFIELD...AND MOVING
  NORTHEAST AT 25 MPH.

* LOCATIONS IMPACTED INCLUDE...
  CHARLTON...SOUTHBRIDGE...WEBSTER...ASHFORD...OXFORD...STURBRIDGE...
  HOLLAND...UNION...TOLLAND...EASTFORD...WOODSTOCK AND DUDLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4222 7195 4204 7173 4183 7213 4197 7228
TIME...MOT...LOC 2102Z 231DEG 21KT 4195 7213 

$$

KJC

2 follow-up statements

009 
WWUS51 KBOX 102117
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
517 PM EDT WED JUL 10 2013

CTC013-015-MAC013-027-102130-
/O.CON.KBOX.TO.W.0010.000000T0000Z-130710T2130Z/
WINDHAM CT-TOLLAND CT-HAMPDEN MA-WORCESTER MA-
517 PM EDT WED JUL 10 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 530 PM EDT FOR
NORTHEASTERN WINDHAM...EXTREME NORTHEASTERN TOLLAND...EXTREME EASTERN
HAMPDEN AND SOUTHERN WORCESTER COUNTIES...
    
AT 512 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR
WOODSTOCK...OR 9 MILES NORTHWEST OF PUTNAM...MOVING NORTHEAST AT 25
MPH.

LOCATIONS IMPACTED INCLUDE...
CHARLTON...SOUTHBRIDGE...WEBSTER...OXFORD...STURBRIDGE...WOODSTOCK
AND DUDLEY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! MOVE TO A BASEMENT OR AN INTERIOR ROOM ON THE LOWEST
FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4222 7195 4204 7173 4191 7203 4205 7215
TIME...MOT...LOC 2112Z 231DEG 21KT 4201 7204 

$$

KJC

829 
WWUS51 KBOX 102131
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
531 PM EDT WED JUL 10 2013

CTC013-015-MAC013-027-102140-
/O.EXP.KBOX.TO.W.0010.000000T0000Z-130710T2130Z/
WINDHAM CT-TOLLAND CT-HAMPDEN MA-WORCESTER MA-
531 PM EDT WED JUL 10 2013

...THE TORNADO WARNING FOR NORTHEASTERN WINDHAM...EXTREME
NORTHEASTERN TOLLAND...EXTREME EASTERN HAMPDEN AND SOUTHERN WORCESTER
COUNTIES HAS EXPIRED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER APPEARS CAPABLE OF PRODUCING A TORNADO.
THEREFORE THE WARNING HAS BEEN ALLOWED TO EXPIRE.

LAT...LON 4222 7195 4204 7173 4191 7203 4205 7215
TIME...MOT...LOC 2130Z 231DEG 21KT 4201 7204 

$$

KJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 1:57 AM EDT	Dense Fog Advisory	BOX	Nantucket	8 hr
Jul 10, 4:07 AM EDT	Flash Flood Watch	BOX	Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex and 4 more	38 hr
Jul 10, 4:52 AM EDT	Small Craft Advisory	BOX		41 hr
Jul 10, 4:55 PM EDT	Flash Flood Warning	BOX	Hampden, Worcester	3 hr
Jul 10, 5:00 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Worcester	45 min
Jul 10, 2:28 PM EDT	Special Weather Statement	BOX		47 min
Jul 10, 3:10 PM EDT	Special Weather Statement	BOX		80 min
Jul 10, 4:46 PM EDT	Special Weather Statement	BOX		44 min
Jul 10, 4:55 PM EDT	Special Weather Statement	BOX		50 min
Jul 10, 5:22 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	38 min
Jul 10, 5:59 PM EDT	Tornado Warning	BOX	Northeastern Connecticut Planning Region	16 min
Jul 10, 6:15 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	30 min

Nearby

Tornado Warnings in Massachusetts, 2013 Tornado Warnings in Connecticut, 2013 Every tornado warning in 2013 Tornadoes in 2013

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.