Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 39, NWS Boston/Norton, MA

June 9, 2011Cheshire County, Hillsborough County, New Hampshire

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 9, 2011, 3:03 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 57 min. 5 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: Jun 9, 2011, 3:03 PM EDT (19:03 UTC)
Expired: Jun 9, 2011, 4:00 PM EDT
In force: 57 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Cheshire County, NH, Hillsborough County, NH

The radar

The Boston radar (KBOX), 152 km from the middle of the area, began a volume at 19:04 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
Jun 9, 3:40 PM EDT	TSTM WND DMG	Keene, NH	TREE DOWN
Jun 9, 3:42 PM EDT	TSTM WND DMG	Keene, NH	TREE AND WIRES DOWN ON HANOVER STREET
Jun 9, 3:52 PM EDT	TSTM WND DMG	Keene, NH	TREES AND WIRES DOWN ON MARLBORO STREET AND NORTH LINCOLN STREET
Jun 9, 4:04 PM EDT	TSTM WND DMG	Harrisville, NH	TREES AND WIRES DOWN ON RTE 137
Jun 9, 4:05 PM EDT	TSTM WND DMG	Dublin, NH	TREES AND WIRES DOWN IN THE SPRUCE DRIVE AREA

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
Jun 9, 12:06 PM EDT	Severe Thunderstorm Watch	SPC	8 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 7.1 hours before the alert went out and 145 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: 588 J/kg
Mixed-layer CIN: -266 J/kg
Mixed-layer LCL: 1124 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 157 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.0

Open this sounding in Storm Lab

The text

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

496 
WUUS51 KBOX 091903
SVRBOX
NHC005-011-092000-
/O.NEW.KBOX.SV.W.0039.110609T1903Z-110609T2000Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
303 PM EDT THU JUN 9 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN CHESHIRE COUNTY IN SOUTHERN NEW HAMPSHIRE...
  THIS INCLUDES THE CITY OF KEENE...
  NORTHWESTERN HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE...

* UNTIL 400 PM EDT

* AT 259 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE
  HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS WERE
  LOCATED ALONG A LINE EXTENDING FROM 28 MILES NORTH OF ALSTEAD TO 11
  MILES NORTHWEST OF ALSTEAD TO 24 MILES WEST OF WALPOLE...OR ALONG A
  LINE EXTENDING FROM 19 MILES NORTH OF SPRINGFIELD TO SPRINGFIELD TO
  STRATTON...AND WAS MOVING EAST AT 40 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WESTMORELAND...MARLOW...
  SURRY...GILSUM...STODDARD...SULLIVAN...HILLSBOROUGH...
  MARLBOROUGH...ROXBURY...WINDSOR...NELSON...WEARE...HARRISVILLE...
  HANCOCK...GREENFIELD...FRANCESTOWN...DUBLIN...DEERING AND
  BENNINGTON.

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.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4312 7185 4315 7167 4306 7164 4306 7157
      4285 7202 4292 7253 4301 7245 4305 7247
      4308 7245 4316 7246 4316 7242 4314 7242
      4314 7238 4316 7238 4319 7216 4314 7217
      4313 7205 4319 7203 4321 7191
TIME...MOT...LOC 1903Z 283DEG 35KT 4354 7234 4328 7240
          4311 7286

$$

KJC

1 follow-up statement

268 
WWUS51 KBOX 091926
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
326 PM EDT THU JUN 9 2011

NHC005-011-092000-
/O.CON.KBOX.SV.W.0039.000000T0000Z-110609T2000Z/
CHESHIRE NH-HILLSBOROUGH NH-
326 PM EDT THU JUN 9 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 400 PM EDT
FOR NORTHWESTERN HILLSBOROUGH AND NORTHERN CHESHIRE COUNTIES...

AT 324 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER
SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE STORMS
WERE LOCATED ALONG A LINE EXTENDING FROM 13 MILES NORTH OF MARLOW TO
WESTMORELAND...OR ALONG A LINE EXTENDING FROM 15 MILES EAST OF
SPRINGFIELD TO 8 MILES SOUTH OF BELLOWS FALLS...MOVING EAST AT 40
MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SURRY...GILSUM...KEENE...SULLIVAN...STODDARD...MARLBOROUGH...
ROXBURY...NELSON...HARRISVILLE...WINDSOR...DUBLIN...HILLSBOROUGH...
ANTRIM...WEARE...PETERBOROUGH...GREENFIELD...FRANCESTOWN...DEERING...
BENNINGTON AND HANCOCK

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM EDT
THURSDAY EVENING FOR SOUTHERN NEW HAMPSHIRE. A SEVERE THUNDERSTORM
WATCH ALSO REMAINS IN EFFECT UNTIL 1000 PM EDT THURSDAY EVENING FOR
NORTHERN CONNECTICUT AND MASSACHUSETTS AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4312 7185 4315 7167 4306 7164 4306 7157
      4285 7202 4292 7253 4301 7245 4305 7247
      4308 7245 4316 7246 4316 7242 4314 7242
      4314 7238 4316 7238 4319 7216 4314 7217
      4313 7205 4319 7203 4321 7191
TIME...MOT...LOC 1926Z 282DEG 35KT 4330 7216 4301 7244

$$

KJC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 8, 8:37 PM EDT	Special Weather Statement	BOX	Cheshire, Hillsborough	23 min
Jun 9, 2:47 PM EDT	Special Weather Statement	BOX	Cheshire	58 min
Jun 9, 3:06 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	54 min
Jun 9, 3:55 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	65 min
Jun 9, 4:23 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	67 min

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2011 Every severe thunderstorm warning in 2011

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.