Alert archive / Maine / Mesoscale Discussions in 2016

Mesoscale Discussion 1416

July 28, 20166 counties in Maine; 4 counties in New Hampshire; 4 counties in Vermont

The Storm Prediction Center issued this mesoscale discussion at Jul 28, 2016, 12:47 PM EDT for 6 counties in Maine; 4 counties in New Hampshire; 4 counties in Vermont. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jul 28, 2016, 12:47 PM EDT (16:47 UTC)
Expired
Jul 28, 2016, 3:15 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
20%

Counties Androscoggin County, ME, Franklin County, ME, Kennebec County, ME, Oxford County, ME, Penobscot County, ME, Waldo County, ME, Belknap County, NH, Carroll County, NH, Grafton County, NH, Sullivan County, NH, Addison County, VT, Orange County, VT, Rutland County, VT, Windsor County, VT

The radar

The Portland,ME radar (KGYX), 78 km from the middle of the area, began a volume at 16:48 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, 4.8 hours before the alert went out and 78 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, Gray, ME at 12:00Z on 2016-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 107 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, Gray, ME at 12:00Z on 2016-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 45 square meters per square second.193958Sfc1 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
107 J/kg
Mixed-layer CIN
-127 J/kg
Mixed-layer LCL
1699 m above ground
0-6 km bulk shear
26 kt
0-1 km storm-relative helicity
45 m²/s²
0-3 km storm-relative helicity
54 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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Nearby

Mesoscale Discussions in Maine, 2016Mesoscale Discussions in New Hampshire, 2016Mesoscale Discussions in Vermont, 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.