Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 8, NWS Boston/Norton, MA

June 1, 2011Cheshire County, Hillsborough County, New Hampshire

NWS Boston/Norton, MA issued this severe thunderstorm warning at Jun 1, 2011, 2:29 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 61 min. 9 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 1, 2011, 2:29 PM EDT (18:29 UTC)
Expired: Jun 1, 2011, 3:30 PM EDT
In force: 61 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Cheshire County, NH, Hillsborough County, NH

The radar

The Boston radar (KBOX), 149 km from the middle of the area, began a volume at 18:31 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 1, 3:07 PM EDT	HAIL 0.75	Swanzey, NH	HAM RADIO
Jun 1, 3:12 PM EDT	HAIL 0.75	Keene, NH	HAM RADIO
Jun 1, 3:14 PM EDT	HAIL 1	Keene, NH	HAM RADIO
Jun 1, 3:16 PM EDT	HAIL 1.5	Keene, NH
Jun 1, 3:16 PM EDT	HAIL 1.75	Keene, NH
Jun 1, 3:17 PM EDT	HAIL 0.75	Keene, NH	REPORTED FROM PARK AVENUE
Jun 1, 3:20 PM EDT	HAIL 1	Keene, NH
Jun 1, 3:21 PM EDT	HAIL 1.5	Keene, NH	HAM RADIO
Jun 1, 3:26 PM EDT	HAIL 1.75	Keene, NH

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 1, 12:58 PM EDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 6.5 hours before the alert went out and 139 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: 2410 J/kg
Mixed-layer CIN: -130 J/kg
Mixed-layer LCL: 836 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 159 m²/s²
0-3 km storm-relative helicity: 189 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

615 
WUUS51 KBOX 011829
SVRBOX
NHC005-011-011930-
/O.NEW.KBOX.SV.W.0008.110601T1829Z-110601T1930Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
229 PM EDT WED JUN 1 2011

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CHESHIRE COUNTY IN SOUTHERN NEW HAMPSHIRE...
  THIS INCLUDES THE CITIES OF...KEENE...JAFFREY...
  WESTERN HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE...

* UNTIL 330 PM EDT

* AT 227 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED 12 MILES WEST OF WESTMORELAND...
  OR 8 MILES NORTHWEST OF BRATTLEBORO...AND WAS MOVING EAST AT 45
  MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...HINSDALE...CHESTERFIELD...
  WALPOLE...WINCHESTER...ALSTEAD...SURRY...RICHMOND...SWANZEY...
  GILSUM...SULLIVAN...MARLBOROUGH...ROXBURY...MARLOW...TROY...
  FITZWILLIAM...NELSON...HARRISVILLE...STODDARD...DUBLIN...RINDGE...
  HANCOCK...WINDSOR...PETERBOROUGH...BENNINGTON...SHARON...
  HILLSBOROUGH...DEERING...NEW IPSWICH...GREENFIELD...TEMPLE...
  GREENVILLE...FRANCESTOWN...WILTON...WEARE...NEW BOSTON...MONT
  VERNON...MILFORD...MASON...LYNDEBOROUGH AND BROOKLINE.

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...FREQUENT LIGHTNING WAS
OCCURRING WITH THIS STORM. GET INDOORS OR INSIDE A VEHICLE NOW! DO
NOT SEEK SHELTER UNDER TREES. IF YOU CAN HEAR THUNDER...YOU ARE CLOSE
ENOUGH TO BE STRUCK BY LIGHTNING.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE
AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4312 7185 4315 7167 4306 7164 4270 7165
      4272 7246 4281 7255 4288 7256 4292 7253
      4295 7254 4301 7245 4305 7247 4316 7246
      4314 7242 4314 7238 4316 7237 4319 7217
      4314 7217 4313 7205 4319 7203 4321 7191
TIME...MOT...LOC 1828Z 268DEG 39KT 4295 7267

$$

BELK

1 follow-up statement

677 
WWUS51 KBOX 011847
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
247 PM EDT WED JUN 1 2011

NHC005-011-011930-
/O.CON.KBOX.SV.W.0008.000000T0000Z-110601T1930Z/
CHESHIRE NH-HILLSBOROUGH NH-
247 PM EDT WED JUN 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 330 PM EDT
FOR CENTRAL HILLSBOROUGH AND CENTRAL CHESHIRE COUNTIES...

AT 245 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WESTMORELAND...OR 7 MILES NORTH OF BRATTLEBORO...MOVING
EAST AT 40 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CHESTERFIELD...WALPOLE...SURRY...KEENE...SWANZEY...GILSUM...
SULLIVAN...MARLBOROUGH...ROXBURY...TROY...NELSON...HARRISVILLE...
DUBLIN...JAFFREY...HANCOCK...WINDSOR...PETERBOROUGH...ANTRIM...
BENNINGTON...WILTON...TEMPLE...SHARON...NEW BOSTON...MONT VERNON...
MILFORD...LYNDEBOROUGH...GREENFIELD...FRANCESTOWN AND DEERING

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO 
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY 
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT WEDNESDAY EVENING
FOR NORTHERN CONNECTICUT AND MASSACHUSETTS AND SOUTHERN NEW HAMPSHIRE
AND CENTRAL RHODE ISLAND.

&&

LAT...LON 4309 7245 4306 7164 4279 7165 4284 7255
      4288 7256 4292 7253 4295 7254 4301 7245
TIME...MOT...LOC 1846Z 272DEG 35KT 4295 7251

$$

BELK

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 1, 8:32 AM EDT	Severe Thunderstorm Warning	BOX	Hillsborough	43 min
Jun 1, 2:52 PM EDT	Tornado Warning	BOX	Cheshire	23 min
Jun 1, 3:24 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	51 min
Jun 1, 3:32 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	40 min
Jun 1, 3:55 PM EDT	Special Weather Statement	BOX	Cheshire	35 min
Jun 1, 5:31 PM EDT	Special Weather Statement	BOX	Cheshire	59 min
Jun 1, 5:54 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	52 min
Jun 1, 6:44 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	30 min
Jun 1, 7:12 PM EDT	Tornado Warning	BOX	Cheshire, Hillsborough	48 min
Jun 1, 7:15 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	104 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.