Alert archive / Massachusetts / Mesoscale Discussions in 2008
Mesoscale Discussion 1891
The Storm Prediction Center issued this mesoscale discussion at Jul 24, 2008, 10:40 AM EDT for 4 states. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 24, 2008, 10:40 AM EDT (14:40 UTC)
- Expired
- Jul 24, 2008, 12:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 22 counties
Barnstable County, MA, Bristol County, MA, Dukes County, MA, Essex County, MA, Middlesex County, MA, Nantucket County, MA, Norfolk County, MA, Plymouth County, MA, Suffolk County, MA, Androscoggin County, ME, Cumberland County, ME, Kennebec County, ME, Lincoln County, ME, Sagadahoc County, ME, York County, ME, Rockingham County, NH, Strafford County, NH, Bristol County, RI, Kent County, RI, Newport County, RI, Providence County, RI, Washington County, RI
The radar
The Boston radar (KBOX), 82 km from the middle of the area, began a volume at 14:41 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Gray, ME (KGYX), launched 12:00Z, 2.7 hours before the alert went out and 155 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
- 186 J/kg
- Mixed-layer CIN
- -64 J/kg
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 131 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 24, 12:52 PM EDT | Mesoscale Discussion | SPC | Androscoggin, Cumberland, Franklin, Kennebec, Knox, Lincoln and 7 more | 53 min |
| Jul 24, 12:57 PM EDT | Tornado Watch | SPC | Androscoggin, Cumberland, Franklin, Kennebec, Knox, Lincoln and 7 more | 5 hr |
| Jul 24, 3:49 PM EDT | Mesoscale Discussion | SPC | Androscoggin, Aroostook, Cumberland, Franklin, Hancock, Kennebec and 9 more | 116 min |
| Jul 23, 9:26 PM EDT | Mesoscale Discussion | SPC | Berkshire, Bristol, Hampden, Hampshire, Norfolk, Suffolk and 1 more | 64 min |
| Jul 23, 9:50 PM EDT | Severe Thunderstorm Watch | SPC | Berkshire, Bristol, Essex, Franklin, Hampden, Hampshire and 5 more | 6 hr |
| Jul 24, 12:07 AM EDT | Mesoscale Discussion | SPC | Berkshire, Bristol, Essex, Franklin, Hampden, Hampshire and 5 more | 53 min |
Nearby
Mesoscale Discussions in Massachusetts, 2008Mesoscale Discussions in Maine, 2008Mesoscale Discussions in Rhode Island, 2008Every mesoscale discussion in 2008
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.