Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 17, NWS Boston/Norton, MA

June 15, 2021Essex County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 15, 2021, 5:13 PM EDT for Essex County, Massachusetts. It was in force for 62 min. 2 reports 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 15, 2021, 5:13 PM EDT (21:13 UTC)
Expired: Jun 15, 2021, 6:15 PM EDT
In force: 62 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Essex County, MA

The radar

The Boston radar (KBOX), 92 km from the middle of the area, began a volume at 21:14 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 15, 5:34 PM EDT	HAIL 1	4 N Methuen, MA	RAYMOND'S TURKEY FARM IN METHUEN
Jun 15, 5:34 PM EDT	HAIL 1	4 N Methuen, MA	REPORTED FROM A FARM ON HAMPSTEAD ROAD IN METHUEN.

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

The nearest sounding before it

Gray, ME (KGYX), launched 12:00Z, 9.2 hours before the alert went out and 141 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 659 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 48 m²/s²
0-3 km storm-relative helicity: 126 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

422 
WUUS51 KBOX 152113
SVRBOX
MAC009-152215-
/O.NEW.KBOX.SV.W.0017.210615T2113Z-210615T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Boston/Norton MA
513 PM EDT Tue Jun 15 2021

The National Weather Service in Boston/Norton has issued a

* Severe Thunderstorm Warning for...
  Northwestern Essex County in northeastern Massachusetts...

* Until 615 PM EDT.

* At 513 PM EDT, a severe thunderstorm was located over Pelham, or
  near Salem, moving east at 15 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect wind damage to trees and power lines. Minor hail 
           damage to vehicles is possible.

* Locations impacted include...
  Haverhill, Methuen, North Andover, Amesbury, Georgetown, Boxford,
  Groveland, Merrimac and West Newbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4271 7097 4273 7125 4274 7125 4275 7123
      4274 7119 4279 7118 4281 7116 4282 7113
      4281 7107 4285 7104 4286 7103 4286 7099
TIME...MOT...LOC 2113Z 267DEG 15KT 4277 7129 

HAIL...1.00IN
WIND...60MPH
 
$$

KJC

2 follow-up statements

866 
WWUS51 KBOX 152136
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
536 PM EDT Tue Jun 15 2021

MAC009-152215-
/O.CON.KBOX.SV.W.0017.000000T0000Z-210615T2215Z/
Essex MA-
536 PM EDT Tue Jun 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN ESSEX COUNTY...

At 536 PM EDT, a severe thunderstorm was located over Methuen, moving
east at 15 mph.

HAZARD...60 mph wind gusts and quarter size hail.

SOURCE...Radar indicated.

IMPACT...Expect wind damage to trees and power lines. Minor hail 
         damage to vehicles is possible.

Locations impacted include...
Haverhill, Methuen, North Andover, Amesbury, Georgetown, Boxford,
Groveland, Merrimac and West Newbury.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4271 7097 4273 7125 4274 7125 4275 7123
      4274 7119 4279 7118 4281 7116 4282 7113
      4281 7107 4285 7104 4286 7103 4286 7099
TIME...MOT...LOC 2136Z 267DEG 15KT 4277 7116 

HAIL...1.00IN
WIND...60MPH
 
$$

KJC

362 
WWUS51 KBOX 152207
SVSBOX

Severe Weather Statement
National Weather Service Boston/Norton MA
607 PM EDT Tue Jun 15 2021

MAC009-152217-
/O.EXP.KBOX.SV.W.0017.000000T0000Z-210615T2215Z/
Essex MA-
607 PM EDT Tue Jun 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN ESSEX COUNTY WILL
EXPIRE AT 615 PM EDT...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire.

LAT...LON 4271 7097 4273 7125 4274 7125 4275 7123
      4274 7119 4279 7118 4281 7116 4282 7113
      4281 7107 4285 7104 4286 7103 4286 7099
TIME...MOT...LOC 2207Z 267DEG 15KT 4278 7100 

$$

KJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 15, 5:28 PM EDT	Severe Thunderstorm Warning	BOX	Essex	32 min
Jun 15, 5:32 PM EDT	Special Marine Warning	BOX		58 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2021 Every severe thunderstorm warning in 2021

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.