Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 97, NWS Boston/Norton, MA

August 13, 2016Hampden County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 13, 2016, 1:52 PM EDT for Hampden County, Massachusetts. It was in force for 38 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: Aug 13, 2016, 1:52 PM EDT (17:52 UTC)
Expired: Aug 13, 2016, 2:30 PM EDT
In force: 38 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Hampden County, MA

The radar

The Boston radar (KBOX), 111 km from the middle of the area, began a volume at 17:54 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
Aug 13, 2:15 PM EDT	TSTM WND DMG	West Springfield, MA	TREE DOWN ON MAIN STREET AND BURFORD STREET
Aug 13, 2:25 PM EDT	TSTM WND DMG	Wilbraham, MA	TREE DOWN ON WIRES ON BIRCH STREET ALSO TREE DOWN ON LEEMOND STREET

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, 5.9 hours before the alert went out and 127 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: 356 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 857 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 100 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

Open this sounding in Storm Lab

The text

As transmitted.

457 
WUUS51 KBOX 131752
SVRBOX
MAC013-131830-
/O.NEW.KBOX.SV.W.0097.160813T1752Z-160813T1830Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
152 PM EDT SAT AUG 13 2016

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HAMPDEN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 230 PM EDT

* AT 152 PM EDT...A PAIR OF SEVERE THUNDERSTORMS WERE LOCATED NEAR
  AGAWAM...MOVING EAST AT 10 MPH.

  HAZARD...60 MPH WIND GUSTS. 

  SOURCE...RADAR INDICATED. 

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING...AND TREES. 

* LOCATIONS IMPACTED INCLUDE...
  SPRINGFIELD...CHICOPEE...WESTFIELD...HOLYOKE...AGAWAM...
  WEST SPRINGFIELD...LUDLOW...LONGMEADOW...EAST LONGMEADOW...
  BELCHERTOWN...WILBRAHAM...PALMER...SOUTHWICK...MONSON...HAMPDEN...
  BRIMFIELD...HOLLAND...WALES...RUSSELL AND GRANVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

TORRENTIAL RAINFALL IS OCCURRING WITH THIS STORM...AND MAY LEAD TO
FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED ROADWAYS.

&&

LAT...LON 4223 7241 4220 7240 4219 7239 4219 7237
      4222 7234 4223 7230 4204 7216 4204 7286
      4214 7289
TIME...MOT...LOC 1752Z 269DEG 9KT 4208 7271 

HAIL...<.75IN
WIND...60MPH
 
$$

SIPPRELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 8:01 PM EDT	Special Weather Statement	BOX	Hampden, Hampshire	44 min
Aug 13, 4:31 AM EDT	Excessive Heat Warning	BOX	Hampden	14 hr
Aug 13, 1:32 PM EDT	Special Marine Warning	BOX		28 min
Aug 13, 1:37 PM EDT	Special Weather Statement	BOX	Hampden	38 min
Aug 13, 2:24 PM EDT	Areal Flood Advisory	BOX	Hampden	66 min
Aug 13, 2:52 PM EDT	Severe Thunderstorm Warning	BOX	Hampden	23 min
Aug 13, 4:09 PM EDT	Heat Advisory	BOX	Barnstable, Bristol, Dukes, Essex, Hampden, Middlesex and 4 more	27 hr
Aug 13, 4:34 PM EDT	Areal Flood Advisory	BOX	Middlesex, Norfolk, Suffolk, Worcester	116 min
Aug 13, 5:46 PM EDT	Severe Thunderstorm Warning	BOX	Worcester	29 min
Aug 13, 6:38 PM EDT	Areal Flood Advisory	BOX	Norfolk, Worcester	52 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2016 Every severe thunderstorm warning in 2016

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.