Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 35, NWS Boston/Norton, MA

July 1, 2012Capitol Planning Region, Connecticut; Hampden County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jul 1, 2012, 3:06 PM EDT for Capitol Planning Region, Connecticut; Hampden County, Hampshire County, Massachusetts. It was in force for 39 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: Jul 1, 2012, 3:06 PM EDT (19:06 UTC)
Expired: Jul 1, 2012, 3:45 PM EDT
In force: 39 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Capitol Planning Region, CT, Hampden County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 107 km from the middle of the area, began a volume at 19:08 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
Jul 1, 3:08 PM EDT	HAIL 1.25	New Boston, MA	QUARTER TO HALF DOLLAR SIZE HAIL AT NEW BOSTON GENERAL STORE

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 1, 1:35 PM EDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.1 hours before the alert went out and 99 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: 1902 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 71 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, in the capitals the NWS used until 2016.

486 
WUUS51 KBOX 011906
SVRBOX
CTC003-MAC013-015-011945-
/O.NEW.KBOX.SV.W.0035.120701T1906Z-120701T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
ISSUED BY NATIONAL WEATHER SERVICE NEW YORK NY
306 PM EDT SUN JUL 1 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...
  SOUTHERN HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...
  NORTHWESTERN HARTFORD COUNTY IN NORTHERN CONNECTICUT...

* UNTIL 345 PM EDT...

* AT 305 PM EDT...NATIONAL WEATHER SERVICE 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
  TOLLAND...OR 21 MILES NORTH OF TORRINGTON...AND MOVING EAST AT 25
  MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BLANDFORD...RUSSELL...GRANVILLE...MONTGOMERY...WESTFIELD...
  SOUTHWICK...GRANBY...EAST GRANBY AND WEST SPRINGFIELD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS
IMMEDIATELY! LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS.
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE
STRUCK BY LIGHTNING.

&&

LAT...LON 4211 7306 4215 7307 4216 7303 4223 7301
      4220 7262 4193 7271 4195 7290 4197 7290
      4197 7301 4200 7303 4203 7301 4203 7305
      4209 7308
TIME...MOT...LOC 1907Z 279DEG 21KT 4213 7303

$$

JM

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 1, 2:51 PM EDT	Severe Thunderstorm Warning	BOX	Capitol Planning Region, Northeastern Connecticut Planning Region	38 min
Jul 1, 2:59 PM EDT	Special Weather Statement	BOX		31 min
Jul 1, 3:04 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	41 min
Jul 1, 3:38 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	52 min
Jul 1, 3:44 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	46 min
Jul 1, 4:27 PM EDT	Severe Thunderstorm Warning	BOX	Northeastern Connecticut Planning Region	24 min
Jul 1, 3:40 PM EDT	Severe Thunderstorm Warning	BOX	Barnstable, Plymouth	50 min
Jul 1, 3:42 PM EDT	Special Marine Warning	BOX		48 min
Jul 1, 3:48 PM EDT	Special Marine Warning	BOX		27 min
Jul 1, 4:34 PM EDT	Severe Thunderstorm Warning	BOX	Bristol	41 min
Jul 1, 4:56 PM EDT	Special Marine Warning	BOX		34 min
Jul 1, 5:02 PM EDT	Special Marine Warning	BOX		43 min
Jul 1, 5:33 PM EDT	Special Marine Warning	BOX		27 min
Jul 1, 5:43 PM EDT	Special Weather Statement	BOX	Dukes	47 min
Jul 1, 5:52 PM EDT	Special Marine Warning	BOX		38 min
Jul 1, 6:11 PM EDT	Special Marine Warning	BOX		49 min
Jul 1, 6:56 PM EDT	Special Marine Warning	BOX		49 min
Jul 1, 7:03 PM EDT	Special Marine Warning	BOX		57 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2012 Severe Thunderstorm Warnings in Connecticut, 2012 Every severe thunderstorm warning in 2012

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.