Alert archive / North Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 882
The Storm Prediction Center issued this mesoscale discussion at May 27, 2017, 9:00 PM EDT for 17 counties in North Carolina; 10 counties in Virginia. It was in force for 30 min.
The area
The outline as issued.
The facts
- Issued
- May 27, 2017, 9:00 PM EDT (01:00 UTC)
- Expired
- May 27, 2017, 9:30 PM EDT
- In force
- 30 min
- Issued by
- the Storm Prediction Center
All 27 counties
Beaufort County, NC, Bertie County, NC, Camden County, NC, Chowan County, NC, Dare County, NC, Edgecombe County, NC, Gates County, NC, Halifax County, NC, Hertford County, NC, Hyde County, NC, Martin County, NC, Northampton County, NC, Pasquotank County, NC, Perquimans County, NC, Pitt County, NC, Tyrrell County, NC, Washington County, NC, Brunswick County, VA, City of Emporia, VA, City of Franklin, VA, City of Suffolk, VA, Dinwiddie County, VA, Greensville County, VA, Isle of Wight County, VA, Nottoway County, VA, Southampton County, VA, Sussex County, VA
The radar
The Norfolk radar (KAKQ), 118 km from the middle of the area, began a volume at 01:02 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
Wallops Is Stn, VA (KWAL), launched 00:00Z, 1.0 hours before the alert went out and 249 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1377 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 186 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 |
|---|---|---|---|---|
| May 27, 10:46 PM EDT | Mesoscale Discussion | SPC | Alexander, Alleghany, Ashe, Avery, Buncombe, Burke and 33 more | 89 min |
| May 28, 12:13 AM EDT | Severe Thunderstorm Watch | SPC | Union | 3 hr |
| May 28, 2:17 AM EDT | Mesoscale Discussion | SPC | Cabarrus, Chatham, Davidson, Davie, Harnett, Hoke and 9 more | 58 min |
| May 28, 2:27 PM EDT | Mesoscale Discussion | SPC | Bertie, Camden, Chowan, Currituck, Gates, Hertford and 5 more | 63 min |
| May 28, 4:56 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, Robeson | 2 hr |
| May 28, 7:06 PM EDT | Severe Thunderstorm Watch | SPC | Bladen, Brunswick, Columbus, New Hanover, Pender, Robeson | 4 hr |
Nearby
Mesoscale Discussions in North Carolina, 2017Mesoscale Discussions in Virginia, 2017Every mesoscale discussion in 2017
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.