Alert archive / New Hampshire / Mesoscale Discussions in 2022

Mesoscale Discussion 795

May 16, 20224 states

The Storm Prediction Center issued this mesoscale discussion at May 16, 2022, 6:43 PM EDT for 4 states. It was in force for 62 min.

The area

The outline as issued.

The facts

Issued: May 16, 2022, 6:43 PM EDT (22:43 UTC)
Expired: May 16, 2022, 7:45 PM EDT
In force: 62 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 231

All 28 counties

Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Belknap County, NH, Carroll County, NH, Cheshire County, NH, Coos County, NH, Grafton County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Strafford County, NH, Sullivan County, NH, Bristol County, RI, Kent County, RI, Providence County, RI, Caledonia County, VT, Chittenden County, VT, Essex County, VT, Lamoille County, VT, Orange County, VT, Orleans County, VT, Washington County, VT, Windsor County, VT

The radar

The Burlington radar (KCXX), 161 km from the middle of the area, began a volume at 22:44 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, 10.7 hours before the alert went out and 145 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 772 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 51 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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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 16, 12:48 PM EDT	Mesoscale Discussion	SPC		87 min
May 16, 12:48 PM EDT	Severe Thunderstorm Watch	SPC	Capitol Planning Region, Northwest Hills Planning Region	7 hr
May 16, 1:33 PM EDT	Severe Thunderstorm Watch	SPC	Greater Bridgeport Planning Region	6 hr
May 16, 5:23 PM EDT	Mesoscale Discussion	SPC		97 min
May 16, 5:39 PM EDT	Severe Thunderstorm Watch	SPC	Northeastern Connecticut Planning Region	5 hr

Nearby

Mesoscale Discussions in New Hampshire, 2022 Mesoscale Discussions in Vermont, 2022 Mesoscale Discussions in Massachusetts, 2022 Every mesoscale discussion in 2022

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.