Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 49, NWS Boston/Norton, MA

July 24, 2015Essex County, Middlesex County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 24, 2015, 4:10 PM EDT for Essex County, Middlesex County, Massachusetts. It was in force for 35 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 24, 2015, 4:10 PM EDT (20:10 UTC)
Expired: Jul 24, 2015, 4:45 PM EDT
In force: 35 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Essex County, MA, Middlesex County, MA

The radar

The Boston radar (KBOX), 77 km from the middle of the area, began a volume at 20:10 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.

The nearest sounding before it

Chatham, MA (KCHH), launched 12:00Z, 8.2 hours before the alert went out and 143 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: 48 J/kg
Mixed-layer CIN: -79 J/kg
Mixed-layer LCL: 1551 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

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

068 
WUUS51 KBOX 242010
SVRBOX
MAC009-017-242100-
/O.NEW.KBOX.SV.W.0049.150724T2010Z-150724T2100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
410 PM EDT FRI JUL 24 2015

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WEST CENTRAL ESSEX COUNTY IN NORTHEASTERN MASSACHUSETTS...
  NORTHEASTERN MIDDLESEX COUNTY IN NORTHEASTERN MASSACHUSETTS...

* UNTIL 500 PM EDT

* AT 409 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER
  NORTH ANDOVER...AND WAS MOVING SOUTHEAST AT 20 MPH.

* SOME LOCATIONS IMPACTED INCLUDE...
  LAWRENCE...PEABODY...METHUEN...ANDOVER...NORTH ANDOVER...READING...
  WILMINGTON...NORTH READING...IPSWICH...LYNNFIELD...MIDDLETON...
  GEORGETOWN...BOXFORD...TOPSFIELD AND ROWLEY.

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 4263 7120 4274 7113 4269 7091 4253 7104
TIME...MOT...LOC 2009Z 296DEG 18KT 4267 7111 
$$
MANNING

2 follow-up statements

357 
WWUS51 KBOX 242029
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
429 PM EDT FRI JUL 24 2015

MAC017-242039-
/O.CAN.KBOX.SV.W.0049.000000T0000Z-150724T2100Z/
MIDDLESEX MA-
429 PM EDT FRI JUL 24 2015

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MIDDLESEX COUNTY
IS CANCELED...
    
THE SEVERE THUNDERSTORM WHICH PROMPTED THE WARNING HASMOVED OUT OF 
THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELED.

LAT...LON 4269 7091 4257 7101 4259 7104 4260 7106
      4270 7100
TIME...MOT...LOC 2029Z 296DEG 18KT 4263 7099 

$$

MAC009-242100-
/O.CON.KBOX.SV.W.0049.000000T0000Z-150724T2100Z/
ESSEX MA-
429 PM EDT FRI JUL 24 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 500 PM EDT
FOR CENTRAL ESSEX COUNTY...

AT 429 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED OVER
MIDDLETON...OR NEAR DANVERS...MOVING SOUTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...
NORTH ANDOVER...NORTH READING...IPSWICH...MIDDLETON...BOXFORD...
TOPSFIELD AND ROWLEY.

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 4269 7091 4257 7101 4259 7104 4260 7106
      4270 7100
TIME...MOT...LOC 2029Z 296DEG 18KT 4263 7099 

$$
MANNING

040 
WWUS51 KBOX 242045
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
445 PM EDT FRI JUL 24 2015

MAC009-242054-
/O.CAN.KBOX.SV.W.0049.000000T0000Z-150724T2100Z/
ESSEX MA-
445 PM EDT FRI JUL 24 2015

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL ESSEX COUNTY IS
CANCELED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS
AND EXITED THE WARNED AREA. THEREFORE THE WARNING HAS BEEN CANCELED.

LAT...LON 4269 7091 4257 7101 4259 7104 4260 7106
      4270 7100
TIME...MOT...LOC 2043Z 296DEG 18KT 4260 7089 

$$
MANNING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 12:48 PM EDT	Special Weather Statement	BOX	Essex	42 min
Jul 24, 3:04 PM EDT	Special Weather Statement	BOX	Worcester	41 min
Jul 24, 3:26 PM EDT	Special Weather Statement	BOX	Barnstable	49 min
Jul 24, 3:29 PM EDT	Special Weather Statement	BOX	Middlesex	31 min
Jul 24, 3:37 PM EDT	Severe Thunderstorm Warning	BOX	Essex, Middlesex	38 min
Jul 24, 4:02 PM EDT	Special Weather Statement	BOX	Worcester	43 min
Jul 24, 4:21 PM EDT	Special Marine Warning	BOX		54 min
Jul 24, 4:23 PM EDT	Special Weather Statement	BOX	Worcester	52 min
Jul 24, 4:31 PM EDT	Special Weather Statement	BOX	Essex	44 min
Jul 24, 4:37 PM EDT	Special Weather Statement	BOX	Worcester	38 min
Jul 24, 4:59 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	46 min
Jul 24, 5:28 PM EDT	Special Weather Statement	BOX	Essex	47 min
Jul 24, 5:35 PM EDT	Severe Thunderstorm Warning	BOX	Essex	40 min
Jul 24, 5:36 PM EDT	Special Marine Warning	BOX		54 min
Jul 24, 6:09 PM EDT	Special Weather Statement	BOX	Essex	66 min
Jul 24, 6:13 PM EDT	Special Marine Warning	BOX		62 min
Jul 24, 6:29 PM EDT	Special Marine Warning	BOX		61 min
Jul 24, 6:47 PM EDT	Special Weather Statement	BOX	Essex	43 min
Jul 24, 7:02 PM EDT	Special Marine Warning	BOX		58 min
Jul 24, 7:32 PM EDT	Special Marine Warning	BOX		58 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2015 Every severe thunderstorm warning in 2015

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.