Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 10, 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, 5:09 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 66 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: May 29, 2012, 5:09 PM EDT (21:09 UTC)
Expired: May 29, 2012, 6:15 PM EDT
In force: 66 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Cheshire County, NH, Hillsborough County, NH

The radar

The Albany radar (KENX), 154 km from the middle of the area, began a volume at 21:09 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
May 29, 5:10 PM EDT	HAIL 1	Walpole, NH	NWS COOP
May 29, 5:25 PM EDT	HAIL 0.75	Westmoreland, NH	LASTED FOR 5 MINUTES
May 29, 5:37 PM EDT	HAIL 0.88	Keene, NH
May 29, 6:00 PM EDT	HAIL 2	Westmoreland, NH
May 29, 6:05 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
May 29, 3:44 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.2 hours before the alert went out and 133 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: 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.

623 
WUUS51 KBOX 292109
SVRBOX
NHC005-011-292215-
/O.NEW.KBOX.SV.W.0010.120529T2109Z-120529T2215Z/

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

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 615 PM EDT

* AT 504 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
  KEENE...AND WAS MOVING NORTHEAST AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...GILSUM...SULLIVAN...
  HARRISVILLE...ALSTEAD...NELSON...MARLOW...HANCOCK...STODDARD...
  BENNINGTON...WINDSOR...DEERING AND HILLSBOROUGH.

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 1000 PM EDT
TUESDAY EVENING FOR SOUTHERN NEW HAMPSHIRE.

&&

LAT...LON 4313 7186 4299 7186 4279 7252 4280 7254
      4288 7256 4292 7253 4295 7254 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 7190
TIME...MOT...LOC 2109Z 225DEG 25KT 4301 7225

$$

FRANK

3 follow-up statements

653 
WWUS51 KBOX 292118
SVSBOX

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

NHC005-011-292215-
/O.CON.KBOX.SV.W.0010.000000T0000Z-120529T2215Z/
CHESHIRE NH-HILLSBOROUGH NH-
518 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN HILLSBOROUGH AND NORTHERN CHESHIRE COUNTIES...

AT 516 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR SULLIVAN...OR 8 MILES NORTHEAST OF KEENE...MOVING
NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
MARLOW...HANCOCK...STODDARD...BENNINGTON...ANTRIM...WINDSOR...DEERING
AND HILLSBOROUGH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR SOUTHERN NEW HAMPSHIRE.

&&

LAT...LON 4313 7186 4299 7186 4279 7252 4280 7254
      4288 7256 4292 7253 4295 7254 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 7190
TIME...MOT...LOC 2118Z 225DEG 25KT 4305 7219

$$

FRANK

882 
WWUS51 KBOX 292129
SVSBOX

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

NHC005-011-292215-
/O.CON.KBOX.SV.W.0010.000000T0000Z-120529T2215Z/
CHESHIRE NH-HILLSBOROUGH NH-
529 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN HILLSBOROUGH AND NORTHERN CHESHIRE COUNTIES...

AT 526 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR STODDARD...OR 13 MILES NORTHEAST OF KEENE...MOVING
NORTHEAST AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
BENNINGTON...ANTRIM...WINDSOR...DEERING AND HILLSBOROUGH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR SOUTHERN NEW HAMPSHIRE.

&&

LAT...LON 4313 7186 4299 7186 4279 7252 4280 7254
      4288 7256 4292 7253 4295 7254 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 7190
TIME...MOT...LOC 2128Z 225DEG 25KT 4310 7212

$$

FRANK

354 
WWUS51 KBOX 292152
SVSBOX

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

NHC005-011-292215-
/O.CON.KBOX.SV.W.0010.000000T0000Z-120529T2215Z/
CHESHIRE NH-HILLSBOROUGH NH-
552 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN HILLSBOROUGH AND NORTHERN CHESHIRE COUNTIES...

AT 549 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 7 MILES NORTHWEST OF HILLSBOROUGH...OR 8 MILES WEST OF
HENNIKER...MOVING NORTHEAST AT 30 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
TUESDAY EVENING FOR SOUTHERN NEW HAMPSHIRE.

&&

LAT...LON 4313 7186 4299 7186 4279 7252 4280 7254
      4288 7256 4292 7253 4295 7254 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 7190
TIME...MOT...LOC 2151Z 225DEG 25KT 4321 7196

$$

FRANK

The office that day

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

Issued	Product	Office	Counties	Lasted
May 29, 3:04 PM EDT	Special Weather Statement	BOX	Cheshire	41 min
May 29, 3:16 PM EDT	Special Weather Statement	BOX	Cheshire	44 min
May 29, 3:19 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	41 min
May 29, 3:30 PM EDT	Tornado Warning	BOX	Cheshire	45 min
May 29, 3:42 PM EDT	Special Weather Statement	BOX	Cheshire	48 min
May 29, 3:51 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	54 min
May 29, 4:24 PM EDT	Areal Flood Advisory	BOX	Cheshire, Hillsborough	3 hr
May 29, 4:37 PM EDT	Tornado Warning	BOX	Cheshire	38 min
May 29, 4:45 PM EDT	Flash Flood Warning	BOX	Cheshire	3 hr
May 29, 6:13 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	62 min
May 29, 6:39 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire	66 min
May 29, 7:09 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	25 min
May 29, 7:32 PM EDT	Areal Flood Advisory	BOX	Hillsborough	3 hr
May 29, 7:44 PM EDT	Areal Flood Warning	BOX	Cheshire	6 hr

Nearby

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