Alert archive / Massachusetts / Mesoscale Discussions in 2016

Mesoscale Discussion 838

June 7, 20169 counties in Massachusetts; Cheshire County, Hillsborough County, Rockingham County, New Hampshire

The Storm Prediction Center issued this mesoscale discussion at Jun 7, 2016, 12:12 PM EDT for 9 counties in Massachusetts; Cheshire County, Hillsborough County, Rockingham County, New Hampshire. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 7, 2016, 12:12 PM EDT (16:12 UTC)
Expired
Jun 7, 2016, 2:15 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%

Counties Berkshire County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Cheshire County, NH, Hillsborough County, NH, Rockingham County, NH

The radar

The Boston radar (KBOX), 103 km from the middle of the area, began a volume at 16:12 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, 4.2 hours before the alert went out and 140 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-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2016-06-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2016-06-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -3 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
23 J/kg
Mixed-layer CIN
-57 J/kg
Mixed-layer LCL
828 m above ground
0-6 km bulk shear
62 kt
0-1 km storm-relative helicity
-3 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Massachusetts, 2016Mesoscale Discussions in New Hampshire, 2016Mesoscale Discussions in Connecticut, 2016Every mesoscale discussion in 2016

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.