Alert archive / New Hampshire / Tornado Warnings in 2012

Tornado Warning 2, NWS Boston/Norton, MA

May 29, 2012Cheshire County, New Hampshire

NWS Boston/Norton, MA issued this tornado warning at May 29, 2012, 4:37 PM EDT for Cheshire County, New Hampshire. It was in force for 38 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, 4:37 PM EDT (20:37 UTC)
Expired: May 29, 2012, 5:15 PM EDT
In force: 38 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

County Cheshire County, NH

The radar

The Albany radar (KENX), 151 km from the middle of the area, began a volume at 20:36 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, 4:50 PM EDT	HAIL 1.75	Walpole, NH
May 29, 5:00 PM EDT	HAIL 0.75	Walpole, NH
May 29, 5:08 PM EDT	TSTM WND DMG	East Alstead, NH	TREE DOWN ON POWER LINES
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

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, 8.6 hours before the alert went out and 129 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.

213 
WFUS51 KBOX 292037
TORBOX
NHC005-292115-
/O.NEW.KBOX.TO.W.0002.120529T2037Z-120529T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
437 PM EDT TUE MAY 29 2012

THE NATIONAL WEATHER SERVICE IN TAUNTON HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN CHESHIRE COUNTY IN SOUTHERN NEW HAMPSHIRE...

* UNTIL 515 PM EDT

* AT 432 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 6 MILES WEST OF
  WESTMORELAND...OR 8 MILES NORTH OF BRATTLEBORO...MOVING NORTHEAST
  AT 30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...WALPOLE...SURRY...
  ALSTEAD...GILSUM...SULLIVAN AND MARLOW.

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS A
TORNADO MAY ALREADY BE ON THE GROUND OR IS EXPECTED TO DEVELOP
SHORTLY. TAKE COVER NOW! MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE
OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4316 7216 4314 7217 4314 7215 4302 7208
      4290 7253 4295 7254 4298 7248 4301 7245
      4305 7247 4308 7245 4316 7246 4316 7242
      4314 7242 4314 7238 4316 7238 4318 7218
TIME...MOT...LOC 2037Z 240DEG 26KT 4299 7253

$$

FRANK

2 follow-up statements

927 
WWUS51 KBOX 292052
SVSBOX

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

NHC005-292115-
/O.CON.KBOX.TO.W.0002.000000T0000Z-120529T2115Z/
CHESHIRE NH-
452 PM EDT TUE MAY 29 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR NORTHERN
CHESHIRE COUNTY...

AT 446 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A POSSIBLE TORNADO.  THIS TORNADO WAS LOCATED NEAR 
WESTMORELAND...OR 8 MILES SOUTH OF BELLOWS FALLS...MOVING NORTHEAST 
AT 30 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
SURRY...ALSTEAD...GILSUM...SULLIVAN AND MARLOW

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IN ADDITION TO THE POSSIBLE TORNADO...THIS STORM IS CAPABLE OF 
PRODUCING GOLF BALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS.

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

&&

LAT...LON 4316 7216 4314 7217 4314 7215 4302 7208
      4290 7253 4295 7254 4298 7248 4301 7245
      4305 7247 4308 7245 4316 7246 4316 7242
      4314 7242 4314 7238 4316 7238 4318 7218
TIME...MOT...LOC 2051Z 240DEG 26KT 4304 7241

$$

FRANK

597 
WWUS51 KBOX 292113
SVSBOX

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

NHC005-292122-
/O.EXP.KBOX.TO.W.0002.000000T0000Z-120529T2115Z/
CHESHIRE NH-
513 PM EDT TUE MAY 29 2012

...THE TORNADO WARNING FOR NORTHERN CHESHIRE COUNTY WILL EXPIRE AT
515 PM EDT...

HOWEVER...A SEVERE THUNDERSTORM WARNING HAS REPLACED THE TORNADO 
WARNING.  LARGE HAIL AND DAMAGING WIND GUSTS ARE EXPECTED WITH THIS 
STORM...BUT THE TORNADO THREAT HAS DIMINISHED.

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

LAT...LON 4316 7216 4314 7217 4314 7215 4302 7208
      4290 7253 4295 7254 4298 7248 4301 7245
      4305 7247 4308 7245 4316 7246 4316 7242
      4314 7242 4314 7238 4316 7238 4318 7218
TIME...MOT...LOC 2112Z 240DEG 26KT 4312 7223

$$

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, 4:45 PM EDT	Flash Flood Warning	BOX	Cheshire	3 hr
May 29, 5:09 PM EDT	Severe Thunderstorm Warning	BOX	Cheshire, Hillsborough	66 min
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

Tornado Warnings in New Hampshire, 2012 Every tornado warning in 2012 Tornadoes 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.