Alert archive / Massachusetts / Mesoscale Discussions in 2018
Mesoscale Discussion 1067
The Storm Prediction Center issued this mesoscale discussion at Jul 17, 2018, 2:19 PM EDT for 9 counties in Massachusetts; Bristol County, Kent County, Providence County, Rhode Island. It was in force for 86 min.
The area
The outline as issued.
The facts
- Issued
- Jul 17, 2018, 2:19 PM EDT (18:19 UTC)
- Expired
- Jul 17, 2018, 3:45 PM EDT
- In force
- 86 min
- Issued by
- the Storm Prediction Center
Counties Bristol County, MA, Essex County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Worcester County, MA, Bristol County, RI, Kent County, RI, Providence County, RI
The radar
The Brookhaven radar (KOKX), 110 km from the middle of the area, began a volume at 18:23 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
Brookhaven, NY (KOKX), launched 12:00Z, 6.3 hours before the alert went out and 110 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.
- Mixed-layer CAPE
- 1293 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 799 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 113 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 10:35 AM EDT | Mesoscale Discussion | SPC | 115 min | |
| Jul 17, 11:17 AM EDT | Severe Thunderstorm Watch | SPC | Capitol Planning Region, Northwest Hills Planning Region, Northeastern Connecticut Planning Region | 8 hr |
| Jul 17, 11:49 AM EDT | Mesoscale Discussion | SPC | 116 min |
Nearby
Mesoscale Discussions in Massachusetts, 2018Mesoscale Discussions in Connecticut, 2018Mesoscale Discussions in Rhode Island, 2018Every mesoscale discussion in 2018
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.