Alert archive / Massachusetts / Severe Thunderstorm Warnings in 2007

Severe Thunderstorm Warning 3, NWS Boston/Norton, MA

May 10, 2007Franklin County, Massachusetts

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 10, 2007, 3:16 PM EDT for Franklin County, Massachusetts. It was in force for 29 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: May 10, 2007, 3:16 PM EDT (19:16 UTC)
Expired: May 10, 2007, 3:45 PM EDT
In force: 29 min
Issued by: NWS Boston/Norton, MA
Area: Counties, with a storm outline in the text

County Franklin County, MA

The radar

The Albany radar (KENX), 110 km from the middle of the area, began a volume at 19:16 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 12:00Z, 7.3 hours before the alert went out and 91 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: 654 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 10 m²/s²
0-3 km storm-relative helicity: 25 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.

000 
WUUS51 KBOX 101917
SVRBOX
MAC011-101945-
/O.NEW.KBOX.SV.W.0003.070510T1916Z-070510T1945Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
316 PM EDT THU MAY 10 2007

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WESTERN FRANKLIN COUNTY IN WESTERN MASSACHUSETTS...

* UNTIL 345 PM EDT

* AT 311 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  COLRAIN...OR ABOUT 8 MILES NORTHWEST OF GREENFIELD...AND MOVING
  NORTHEAST AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  LEYDEN BY 325 PM EDT...


LAT...LON 4274 7274 4273 7252 4247 7272 4253 7288

$$

WTB

1 follow-up statement

000 
WWUS51 KBOX 101929
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
326 PM EDT THU MAY 10 2007

MAC011-101945-
/O.CON.KBOX.SV.W.0003.000000T0000Z-070510T1945Z/
FRANKLIN MA-
326 PM EDT THU MAY 10 2007

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 345 PM EDT
FOR WESTERN FRANKLIN COUNTY...

AT 325 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE SEVERE THUNDERSTORMS CAPABLE OF PRODUCING PENNY SIZE 
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THE STORMS WERE  
LOCATED NEAR SHELBURNE AND CONWAY...ABOUT 6 MILES WEST AND SOUTHWEST 
OF GREENFIELD...MOVING NORTHEAST AT 20 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  COLRAIN BY 340 PM EDT...
  LEYDEN AND GREENFIELD BY 345 PM EDT...

LAT...LON 4268 7277 4272 7276 4273 7274 4273 7253
      4256 7264 4247 7273 4248 7274 4248 7275
      4253 7288

$$

WTB

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 10:20 AM EDT	Marine Weather Statement	BOX		23 hr
May 10, 2:35 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	40 min
May 10, 3:37 PM EDT	Flash Flood Warning	BOX	Franklin	53 min
May 10, 3:43 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	32 min
May 10, 4:50 PM EDT	Dense Fog Advisory	BOX	Barnstable, Bristol, Dukes, Nantucket, Norfolk, Plymouth	16 hr
May 10, 6:12 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	63 min
May 10, 6:27 PM EDT	Flash Flood Warning	BOX	Franklin	93 min
May 10, 7:15 PM EDT	Severe Thunderstorm Warning	BOX	Franklin	26 min

Nearby

Severe Thunderstorm Warnings in Massachusetts, 2007 Every severe thunderstorm warning in 2007

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.