Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 12, NWS Boston/Norton, MA

May 29, 2012Cheshire County, Hillsborough County, New Hampshire

NWS Boston/Norton, MA issued this severe thunderstorm warning at May 29, 2012, 6:13 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 62 min. 6 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
May 29, 2012, 6:13 PM EDT (22:13 UTC)
Expired
May 29, 2012, 7:15 PM EDT
In force
62 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 22:12 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

TimeReportWhereRemark
May 29, 6:29 PM EDTTSTM WND DMGAlstead, NHTREES AND WIRES DOWN ON PLEASANT STREET
May 29, 6:58 PM EDTTSTM WND DMGWalpole, NHTREE DOWN ON BOOK CELLAR ROAD
May 29, 7:01 PM EDTTSTM WND DMGKeene, NHTREES AND WIRES DOWN ON ARCH STREET
May 29, 7:06 PM EDTTSTM WND DMGHancock, NHTREES AND WIRES DOWN BLOCKING CAVENDAR ROAD
May 29, 7:06 PM EDTHAIL 1.75Antrim, NHFLOODED ROAD ON MT GILBOA ROAD
May 29, 7:25 PM EDTHAIL 0.75West Swanzey, 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.

IssuedProductOfficeLasted
May 29, 3:44 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 10.2 hours before the alert went out and 144 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2012-05-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1908 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2012-05-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 123 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1908 J/kg
Mixed-layer CIN
-96 J/kg
Mixed-layer LCL
1026 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
123 m²/s²
0-3 km storm-relative helicity
141 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.7

Open this sounding in Storm Lab

The text

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

601 
WUUS51 KBOX 292213
SVRBOX
NHC005-011-292315-
/O.NEW.KBOX.SV.W.0012.120529T2213Z-120529T2315Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
613 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

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

* UNTIL 715 PM EDT

* AT 609 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
  STODDARD...OR 14 MILES NORTHEAST OF KEENE...AND WAS MOVING
  NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...BENNINGTON...WINDSOR...
  GREENFIELD...HILLSBOROUGH...DEERING...FRANCESTOWN...NEW BOSTON...
  WEARE AND GOFFSTOWN.

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.

&&

LAT...LON 4312 7185 4315 7167 4306 7164 4307 7152
      4302 7143 4278 7251 4285 7256 4292 7253
      4295 7254 4301 7245 4305 7247 4308 7245
      4316 7246 4314 7238 4316 7238 4319 7217
      4314 7217 4313 7205 4319 7203 4321 7191
TIME...MOT...LOC 2213Z 243DEG 32KT 4306 7201

$$

FRANK
1 follow-up statement
158 
WWUS51 KBOX 292244
SVSBOX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
644 PM EDT TUE MAY 29 2012

NHC005-011-292315-
/O.CON.KBOX.SV.W.0012.000000T0000Z-120529T2315Z/
CHESHIRE NH-HILLSBOROUGH NH-
644 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 715 PM EDT
FOR NORTHERN HILLSBOROUGH AND CHESHIRE COUNTIES...

AT 642 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 DEERING...OR 6 MILES SOUTH OF HENNIKER...MOVING
NORTHEAST AT 35 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO NEW
BOSTON...WEARE AND GOFFSTOWN

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR NORTHERN CONNECTICUT AND WESTERN MASSACHUSETTS
AND SOUTHERN NEW HAMPSHIRE.

&&

LAT...LON 4312 7185 4315 7167 4306 7164 4307 7152
      4302 7144 4278 7250 4285 7256 4294 7246
      4295 7254 4299 7243 4307 7234 4316 7245
      4313 7234 4314 7234 4316 7238 4318 7217
      4314 7217 4313 7205 4319 7202 4321 7191
TIME...MOT...LOC 2244Z 243DEG 32KT 4310 7182

$$

FRANK

The office that day

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

IssuedProductOfficeCountiesLasted
May 29, 3:04 PM EDTSpecial Weather StatementBOXCheshire41 min
May 29, 3:16 PM EDTSpecial Weather StatementBOXCheshire44 min
May 29, 3:19 PM EDTSevere Thunderstorm WarningBOXCheshire41 min
May 29, 3:30 PM EDTTornado WarningBOXCheshire45 min
May 29, 3:42 PM EDTSpecial Weather StatementBOXCheshire48 min
May 29, 3:51 PM EDTSevere Thunderstorm WarningBOXCheshire, Hillsborough54 min
May 29, 4:24 PM EDTAreal Flood AdvisoryBOXCheshire, Hillsborough3 hr
May 29, 4:37 PM EDTTornado WarningBOXCheshire38 min
May 29, 4:45 PM EDTFlash Flood WarningBOXCheshire3 hr
May 29, 5:09 PM EDTSevere Thunderstorm WarningBOXCheshire, Hillsborough66 min
May 29, 6:39 PM EDTSevere Thunderstorm WarningBOXCheshire66 min
May 29, 7:09 PM EDTSevere Thunderstorm WarningBOXCheshire, Hillsborough25 min
May 29, 7:32 PM EDTAreal Flood AdvisoryBOXHillsborough3 hr
May 29, 7:44 PM EDTAreal Flood WarningBOXCheshire6 hr

Nearby

Severe Thunderstorm Warnings in New Hampshire, 2012Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.