Alert archive / New Hampshire / Special Weather Statements in 2012

Special Weather Statement, NWS Boston/Norton, MA

August 12, 2012Hillsborough County, New Hampshire

NWS Boston/Norton, MA issued this special weather statement at Aug 12, 2012, 4:27 PM EDT for Hillsborough County, New Hampshire. It was in force for 33 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: Aug 12, 2012, 4:27 PM EDT (20:27 UTC)
Expired: Aug 12, 2012, 5:00 PM EDT
In force: 33 min
Issued by: NWS Boston/Norton, MA

County Hillsborough County, NH

The radar

The Boston radar (KBOX), 133 km from the middle of the area, began a volume at 20:29 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

Gray, ME (KGYX), launched 12:00Z, 8.5 hours before the alert went out and 146 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: 220 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 529 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 93 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.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Boston/Norton, MA wrote its last area forecast discussion before this special weather statement went out at Aug 12, 3:51 PM EDT, 36 minutes earlier.

Area forecast discussion, Aug 12, 3:51 PM EDT, 36 minutes before

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Hazardous weather outlook, Aug 12, 4:21 PM EDT, 6 minutes before

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In the hours before

Local storm report, Aug 12, 11:35 AM EDT, 4 hours 52 minutes before

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Special weather statement, Aug 12, 2:53 PM EDT, 1 hour 34 minutes before

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Special weather statement, Aug 12, 3:26 PM EDT, 1 hour 1 minute before

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Special weather statement, Aug 12, 4:27 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 8:18 PM EDT	Severe Thunderstorm Warning	BOX	Middlesex, Worcester	30 min
Aug 12, 7:32 AM EDT	Areal Flood Advisory	BOX	Hampden, Hampshire, Worcester	3 hr
Aug 12, 2:53 PM EDT	Special Weather Statement	BOX	Worcester	37 min
Aug 12, 3:26 PM EDT	Special Weather Statement	BOX	Worcester	64 min
Aug 12, 4:24 PM EDT	Areal Flood Advisory	BOX	Middlesex, Worcester	55 min
Aug 12, 6:38 PM EDT	Special Weather Statement	BOX	Suffolk	22 min
Aug 12, 7:03 PM EDT	Areal Flood Advisory	BOX	Essex	39 min
Aug 12, 1:34 PM EDT	Areal Flood Advisory	BOX	Northeastern Connecticut Planning Region	84 min
Aug 11, 8:13 PM EDT	Special Weather Statement	BOX	Hillsborough	47 min
Aug 11, 8:42 PM EDT	Special Weather Statement	BOX	Cheshire	63 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.