Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 78, NWS Boston/Norton, MA

August 9, 2012Franklin County, Hampshire County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at Aug 9, 2012, 1:48 PM EDT for Franklin County, Hampshire County, Massachusetts. It was in force for 32 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: Aug 9, 2012, 1:48 PM EDT (17:48 UTC)
Expired: Aug 9, 2012, 2:20 PM EDT
In force: 32 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Franklin County, MA, Hampshire County, MA

The radar

The Albany radar (KENX), 109 km from the middle of the area, began a volume at 17:49 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 12:00Z, 5.8 hours before the alert went out and 92 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: 780 J/kg
Mixed-layer CIN: -89 J/kg
Mixed-layer LCL: 965 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 62 m²/s²
0-3 km storm-relative helicity: 72 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

144 
WUUS51 KBOX 091748
SVRBOX
MAC011-015-091830-
/O.NEW.KBOX.SV.W.0078.120809T1748Z-120809T1830Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
148 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTH CENTRAL FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...
  NORTH CENTRAL HAMPSHIRE COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 230 PM EDT

* AT 145 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
  GOSHEN...OR 10 MILES NORTHWEST OF NORTHAMPTON...AND WAS MOVING EAST
  AT 5 MPH.

* THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL   
AREAS EAST OF GOSHEN.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS AND LARGE HAIL...AS WELL
AS DEADLY LIGHTNING AND TORRENTIAL RAIN. GET TO SAFE SHELTER NOW...
INSIDE A STURDY BUILDING OR IN A VEHICLE. DO NOT SEEK SHELTER UNDER
TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE STRUCK BY
LIGHTNING. DRIVERS SHOULD BE ALERT FOR PONDING OF WATER AND AVOID
FLOODED ROADS.

&&

LAT...LON 4249 7269 4241 7271 4242 7284 4250 7281
TIME...MOT...LOC 1747Z 270DEG 3KT 4245 7277

$$

WTB

1 follow-up statement

627 
WWUS51 KBOX 091820
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
220 PM EDT THU AUG 9 2012

MAC011-015-091830-
/O.CAN.KBOX.SV.W.0078.000000T0000Z-120809T1830Z/
FRANKLIN MA-HAMPSHIRE MA-
220 PM EDT THU AUG 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTH CENTRAL HAMPSHIRE AND
SOUTH CENTRAL FRANKLIN COUNTIES IS CANCELLED...

THE THUNDERSTORM HAS DIMINISHED.

LAT...LON 4249 7269 4241 7271 4242 7284 4250 7281
TIME...MOT...LOC 1820Z 270DEG 3KT 4245 7273

$$

WTB

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 9, 1:01 PM EDT	Special Weather Statement	BOX	Franklin	59 min
Aug 9, 1:16 PM EDT	Areal Flood Advisory	BOX	Franklin	108 min
Aug 9, 1:39 PM EDT	Special Weather Statement	BOX	Hampshire	51 min
Aug 9, 1:53 PM EDT	Areal Flood Advisory	BOX	Franklin, Hampshire	2 hr
Aug 9, 2:03 PM EDT	Special Weather Statement	BOX	Hampshire	57 min
Aug 9, 2:18 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire	53 min
Aug 9, 2:44 PM EDT	Special Weather Statement	BOX	Hampden	46 min
Aug 9, 2:53 PM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire	45 min
Aug 9, 5:11 PM EDT	Special Weather Statement	BOX	Worcester	64 min
Aug 9, 5:44 PM EDT	Special Weather Statement	BOX	Worcester	61 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.