Alert archive / Massachusetts / Special Weather Statements in 2021

Special Weather Statement, NWS Boston/Norton, MA

June 14, 2021Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this special weather statement at Jun 14, 2021, 6:15 AM EDT for Hampshire County, Massachusetts. It was in force for 60 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: Jun 14, 2021, 6:15 AM EDT (10:15 UTC)
Expired: Jun 14, 2021, 7:15 AM EDT
In force: 60 min
Issued by: NWS Boston/Norton, MA

County Hampshire County, MA

The radar

The Albany radar (KENX), 96 km from the middle of the area, began a volume at 10:16 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

Albany, NY (KALY), launched 00:00Z, 10.3 hours before the alert went out and 82 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1539 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: -13 m²/s²
0-3 km storm-relative helicity: 47 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

110 
WWUS81 KBOX 141015
SPSBOX

Special Weather Statement
National Weather Service Boston/Norton MA
615 AM EDT Mon Jun 14 2021
 
MAZ002-003-008>011-141115-
Western Franklin MA-Western Hampshire MA-Western Hampden MA-
Eastern Hampden MA-Eastern Franklin MA-Eastern Hampshire MA-
615 AM EDT Mon Jun 14 2021

...A CLUSTER OF STRONG THUNDERSTORMS IN BERKSHIRE COUNTY MOVING INTO 
THE BERKSHIRES AND THE INTERSTATE 91 CORRIDOR...

At 612 AM EDT, Doppler radar was tracking a cluster of strong 
thunderstorms from Becket to Lenox, moving east at 25 mph.

Pea size hail and winds up to 40 mph will accompany these storms. 
Cloud to ground lightning and torrential downpours capable of 
ponding of water on roads can be expected.

Locations impacted include...
Chicopee, Westfield, Holyoke, Amherst, Northampton, Deerfield, South
Hadley, Easthampton, Montague, Granby, Southampton, Hadley,
Sunderland, Hatfield, Williamsburg, Huntington, Conway, Leverett,
Russell and Ashfield.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Get indoors when this storm approaches. Winds may be strong enough to
produce minor damage, such as a few downed branches.

Lightning can strike far away from the storm. Go inside a building 
or vehicle. Wait at least 30 minutes until after the storm has 
passed to resume outdoor activities.

&&

LAT...LON 4239 7305 4238 7301 4251 7298 4253 7249
      4216 7255 4219 7302 4231 7300 4231 7303
      4233 7306 4238 7307
TIME...MOT...LOC 1012Z 270DEG 21KT 4230 7315 

$$

Loconto

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 14, 5:57 AM EDT	Special Weather Statement	BOX	Franklin	48 min
Jun 14, 6:48 AM EDT	Special Weather Statement	BOX	Hampden	42 min
Jun 14, 7:29 AM EDT	Special Weather Statement	BOX	Hampden, Worcester	46 min
Jun 14, 8:13 AM EDT	Special Weather Statement	BOX	Worcester	47 min
Jun 14, 1:17 PM EDT	Special Weather Statement	BOX	Bristol, Kent, Providence	58 min

Nearby

Special Weather Statements in Massachusetts, 2021 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.