Alert archive / New Hampshire / Special Weather Statements in 2012

Special Weather Statement, NWS Boston/Norton, MA

July 23, 2012Cheshire County, New Hampshire

NWS Boston/Norton, MA issued this special weather statement at Jul 23, 2012, 5:29 PM EDT for Cheshire County, New Hampshire. It was in force for 46 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 23, 2012, 5:29 PM EDT (21:29 UTC)
Expired: Jul 23, 2012, 6:15 PM EDT
In force: 46 min
Issued by: NWS Boston/Norton, MA

County Cheshire County, NH

The radar

The Albany radar (KENX), 147 km from the middle of the area, began a volume at 21:32 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.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 9.5 hours before the alert went out and 125 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: 412 J/kg
Mixed-layer CIN: -117 J/kg
Mixed-layer LCL: 762 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 93 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

857 
WWUS81 KBOX 232129
SPSBOX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TAUNTON MA
529 PM EDT MON JUL 23 2012

NHZ011-015-232215-
CHESHIRE NH-WESTERN AND CENTRAL HILLSBOROUGH NH-
529 PM EDT MON JUL 23 2012

...STRONG THUNDERSTORM IN SOUTHWEST NEW HAMPSHIRE...

AT 525 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
STRONG THUNDERSTORM CAPABLE OF PRODUCING WIND GUSTS TO 40 MPH AND 
PENNY SIZED HAIL NEAR WESTMORELAND...OR ABOUT 7 MILES NORTHWEST OF 
KEENE...MOVING EAST AT 25 MPH.

THIS STORM WILL MOVE ACROSS NORTHERN CHESHIRE AND NORTHWEST 
HILLSBOROUGH COUNTIES THROUGH 615 PM.

* SOME LOCATIONS AFFECTED INCLUDE...SURRY...KEENE...GILSUM...
  SULLIVAN...MARLBOROUGH...ROXBURY...NELSON...HARRISVILLE...STODDARD
  AND DUBLIN.

HEAVY RAIN MAY CAUSE MINOR STREET FLOODING AND PONDING OF WATER IN
LOW LYING AREAS SUCH AS UNDERPASSES. DO NOT DRIVE THROUGH FLOODED
ROADS.

&&

LAT...LON 4289 7201 4291 7253 4296 7254 4298 7248
      4299 7247 4301 7245 4302 7247 4306 7247
      4308 7245 4310 7244 4311 7199

$$

JWD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 3:41 PM EDT	Small Craft Advisory for Hazardous Seas	BOX		24 hr
Jul 23, 4:09 PM EDT	Special Weather Statement	BOX	Franklin	66 min
Jul 23, 9:31 AM EDT	Areal Flood Advisory	BOX	Capitol Planning Region	89 min
Jul 23, 6:17 PM EDT	Special Weather Statement	BOX		58 min
Jul 23, 7:00 PM EDT	Special Weather Statement	BOX		45 min

Nearby

Special Weather Statements in New Hampshire, 2012 Every special weather statement 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.