Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 39, NWS Boston/Norton, MA

June 24, 2013Franklin County, Worcester County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 24, 2013, 6:10 PM EDT for Franklin County, Worcester County, Massachusetts. It was in force for 65 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: Jun 24, 2013, 6:10 PM EDT (22:10 UTC)
Expired: Jun 24, 2013, 7:15 PM EDT
In force: 65 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Franklin County, MA, Worcester County, MA

The radar

The Boston radar (KBOX), 117 km from the middle of the area, began a volume at 22:10 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
Jun 24, 6:14 PM EDT	HAIL 1	Leverett, MA	SKYWARN SPOTTER

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 12:00Z, 10.2 hours before the alert went out and 122 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: 276 J/kg
Mixed-layer CIN: -112 J/kg
Mixed-layer LCL: 1023 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 112 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 2.7

Open this sounding in Storm Lab

The text

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

495 
WUUS51 KBOX 242210
SVRBOX
MAC011-027-242315-
/O.NEW.KBOX.SV.W.0039.130624T2210Z-130624T2315Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
610 PM EDT MON JUN 24 2013

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  NORTHWESTERN WORCESTER COUNTY IN CENTRAL MASSACHUSETTS...

* UNTIL 715 PM EDT

* AT 606 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR MONTAGUE...OR 7 MILES
  SOUTHEAST OF GREENFIELD...AND MOVING EAST AT 20 MPH.

* LOCATIONS IMPACTED INCLUDE...
  HARDWICK...SHUTESBURY...LEVERETT...NEW SALEM...ORANGE...
  PHILLIPSTON...TEMPLETON...PETERSHAM...BARRE...MONTAGUE...WENDELL
  AND ERVING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL. GO INSIDE
TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. IF
DRIVING BE PREPARED FOR LOW VISIBILITY AND DO NOT DRIVE THROUGH
FLOODED ROADS.

THIS STORM WAS ALSO PRODUCING FREQUENT LIGHTNING. GO INDOORS
IMMEDIATELY. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING. WAIT UNTIL AT LEAST 30 MINUTES AFTER THE STORM
ENDS TO RESUME OUTDOOR ACTIVITIES.

&&

LAT...LON 4264 7252 4255 7203 4232 7213 4240 7237
      4242 7238 4242 7242 4247 7259
TIME...MOT...LOC 2209Z 290DEG 18KT 4253 7248 

$$

JWD

2 follow-up statements

327 
WWUS51 KBOX 242215
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
615 PM EDT MON JUN 24 2013

MAC011-027-242315-
/O.CON.KBOX.SV.W.0039.000000T0000Z-130624T2315Z/
FRANKLIN MA-WORCESTER MA-
615 PM EDT MON JUN 24 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR EASTERN FRANKLIN AND NORTHWESTERN WORCESTER COUNTIES...

AT 614 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS OF 60
MPH. THIS STORM WAS LOCATED NEAR MONTAGUE...OR 7 MILES SOUTHEAST OF
GREENFIELD...MOVING EAST AT 20 MPH.

A SPOTTER IN LEVERETT RECENTLY REPORTED QUARTER SIZED HAIL.

LOCATIONS IMPACTED INCLUDE...
HARDWICK...SHUTESBURY...LEVERETT...NEW SALEM...ORANGE...
PHILLIPSTON...TEMPLETON...PETERSHAM...BARRE...MONTAGUE...WENDELL AND
ERVING.

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 4264 7252 4255 7203 4232 7213 4240 7237
      4242 7238 4242 7242 4247 7259
TIME...MOT...LOC 2214Z 290DEG 18KT 4253 7247 

$$

JWD

636 
WWUS51 KBOX 242239
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
639 PM EDT MON JUN 24 2013

MAC011-027-242249-
/O.CAN.KBOX.SV.W.0039.000000T0000Z-130624T2315Z/
FRANKLIN MA-WORCESTER MA-
639 PM EDT MON JUN 24 2013

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN FRANKLIN AND
NORTHWESTERN WORCESTER COUNTIES IS CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSE AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.  HOWEVER HEAVY RAIN IS
STILL POSSIBLE WITH THIS THUNDERSTORM.

&&

LAT...LON 4264 7252 4255 7203 4232 7213 4240 7237
      4242 7238 4242 7242 4247 7259
TIME...MOT...LOC 2239Z 290DEG 18KT 4249 7231 

$$

JWD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 24, 2:36 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire, Worcester	54 min
Jun 24, 3:56 PM EDT	Special Weather Statement	BOX	Franklin	49 min
Jun 24, 4:58 PM EDT	Special Weather Statement	BOX	Franklin, Hampden, Hampshire	62 min
Jun 24, 5:08 PM EDT	Special Weather Statement	BOX	Franklin	52 min
Jun 24, 5:15 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	60 min
Jun 24, 5:31 PM EDT	Severe Thunderstorm Warning	BOX	Franklin, Hampden, Hampshire	59 min
Jun 24, 5:52 PM EDT	Severe Thunderstorm Warning	BOX	Hampden, Hampshire	53 min
Jun 24, 6:23 PM EDT	Special Weather Statement	BOX	Worcester	52 min
Jun 24, 6:48 PM EDT	Special Marine Warning	BOX		42 min
Jun 24, 6:53 PM EDT	Special Weather Statement	BOX	Essex	52 min
Jun 24, 6:58 PM EDT	Severe Thunderstorm Warning	BOX	Essex	47 min
Jun 24, 7:08 PM EDT	Special Weather Statement	BOX	Hampden	52 min
Jun 24, 7:23 PM EDT	Special Marine Warning	BOX		67 min
Jun 24, 7:55 PM EDT	Areal Flood Advisory	BOX	Essex, Middlesex	3 hr

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2013 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.