Alert archive / North Carolina / Mesoscale Discussions in 2017
Mesoscale Discussion 654
The Storm Prediction Center issued this mesoscale discussion at May 5, 2017, 8:27 AM EDT for 15 counties in North Carolina; 11 counties in Virginia. It was in force for 93 min.
The area
The outline as issued.
The facts
- Issued
- May 5, 2017, 8:27 AM EDT (12:27 UTC)
- Expired
- May 5, 2017, 10:00 AM EDT
- In force
- 93 min
- Issued by
- the Storm Prediction Center
All 26 counties
Beaufort County, NC, Bertie County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Craven County, NC, Currituck County, NC, Dare County, NC, Gates County, NC, Hyde County, NC, Pamlico County, NC, Pasquotank County, NC, Perquimans County, NC, Tyrrell County, NC, Washington County, NC, City of Chesapeake, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Isle of Wight County, VA, Mathews County, VA, York County, VA
The radar
The Morehead City radar (KMHX), 128 km from the middle of the area, began a volume at 12:26 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 12:00Z, 0.5 hours before the alert went out and 247 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
- 918 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 307 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
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 4, 8:49 PM EDT | Tornado Watch | SPC | Bladen, Brunswick, Carteret, Columbus, Craven, Cumberland and 13 more | 6 hr |
| May 4, 11:24 PM EDT | Mesoscale Discussion | SPC | Bladen, Brunswick, Columbus, Duplin, Greene, Jones and 7 more | 66 min |
| May 5, 2:28 AM EDT | Mesoscale Discussion | SPC | Alamance, Beaufort, Bertie, Bladen, Camden, Caswell and 43 more | 92 min |
| May 5, 3:09 AM EDT | Tornado Watch | SPC | Alamance, Anson, Bladen, Brunswick, Carteret, Chatham and 37 more | 6 hr |
| May 5, 5:56 AM EDT | Mesoscale Discussion | SPC | Beaufort, Bertie, Camden, Chowan, Currituck, Dare and 12 more | 94 min |
| May 5, 6:25 AM EDT | Tornado Watch | SPC | Beaufort, Bertie, Camden, Chowan, Currituck, Dare and 9 more | 5 hr |
| May 5, 6:15 PM EDT | Mesoscale Discussion | SPC | Halifax, Hertford, Northampton | 90 min |
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.