Alert archive / New Hampshire / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 9, 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, 3:51 PM EDT for Cheshire County, Hillsborough County, New Hampshire. It was in force for 54 min. 1 report 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, 3:51 PM EDT (19:51 UTC)
Expired: May 29, 2012, 4:45 PM EDT
In force: 54 min
Issued by: NWS Boston/Norton, MA
Area: Storm-based polygon

Counties Cheshire County, NH, Hillsborough County, NH

The radar

The Boston radar (KBOX), 150 km from the middle of the area, began a volume at 19:53 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, 4:00 PM EDT	HAIL 0.75	Gilsum, 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, 7.9 hours before the alert went out and 137 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.

184 
WUUS51 KBOX 291951
SVRBOX
NHC005-011-292045-
/O.NEW.KBOX.SV.W.0009.120529T1951Z-120529T2045Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TAUNTON MA
351 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 445 PM EDT

* AT 348 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
  SURRY...OR 7 MILES NORTHWEST OF KEENE...AND WAS MOVING NORTHEAST AT
  30 MPH.

* SOME LOCATIONS IN THE WARNING INCLUDE...GILSUM...SULLIVAN...
  NELSON...MARLOW...STODDARD...WINDSOR...DEERING...HILLSBOROUGH AND
  WEARE.

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

&&

LAT...LON 4312 7185 4315 7171 4311 7165 4284 7255
      4285 7256 4288 7256 4292 7253 4295 7254
      4298 7248 4301 7245 4305 7247 4307 7246
      4314 7216 4313 7205 4317 7203 4320 7190
TIME...MOT...LOC 1951Z 238DEG 24KT 4304 7236

$$

FRANK

2 follow-up statements

405 
WWUS51 KBOX 292016
SVSBOX

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

NHC005-011-292045-
/O.CON.KBOX.SV.W.0009.000000T0000Z-120529T2045Z/
CHESHIRE NH-HILLSBOROUGH NH-
416 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHWESTERN HILLSBOROUGH AND NORTHERN CHESHIRE COUNTIES...

AT 411 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 GILSUM...OR 6 MILES NORTH OF KEENE...MOVING NORTHEAST AT
30 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4312 7185 4315 7171 4311 7165 4287 7252
      4288 7253 4289 7255 4292 7253 4295 7254
      4298 7248 4301 7245 4305 7247 4307 7246
      4314 7216 4313 7205 4317 7203 4320 7190
TIME...MOT...LOC 2016Z 238DEG 24KT 4306 7223

$$

FRANK

288 
WWUS51 KBOX 292033
SVSBOX

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

NHC005-011-292045-
/O.CON.KBOX.SV.W.0009.000000T0000Z-120529T2045Z/
CHESHIRE NH-HILLSBOROUGH NH-
433 PM EDT TUE MAY 29 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR NORTHWESTERN HILLSBOROUGH AND NORTHERN CHESHIRE COUNTIES...

AT 430 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 STODDARD...OR 14 MILES NORTHEAST OF KEENE...MOVING
NORTHEAST AT 30 MPH.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4312 7185 4315 7171 4311 7165 4287 7252
      4288 7253 4289 7255 4292 7253 4295 7254
      4298 7248 4301 7245 4305 7247 4307 7246
      4314 7216 4313 7205 4317 7203 4320 7190
TIME...MOT...LOC 2033Z 238DEG 24KT 4312 7210

$$

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, 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, 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

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.