Alert archive / Virginia / Mesoscale Discussions in 2016
Mesoscale Discussion 151
The Storm Prediction Center issued this mesoscale discussion at Feb 24, 2016, 6:40 PM EST for Charles County, Saint Mary's County, Maryland; 38 counties in North Carolina; 43 counties in Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 24, 2016, 6:40 PM EST (23:40 UTC)
- Expired
- Feb 24, 2016, 8:45 PM EST
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 83 counties
Charles County, MD, Saint Mary's County, MD, Beaufort County, NC, Bertie County, NC, Bladen County, NC, Camden County, NC, Carteret County, NC, Chowan County, NC, Craven County, NC, Cumberland County, NC, Currituck County, NC, Dare County, NC, Duplin County, NC, Edgecombe County, NC, Franklin County, NC, Gates County, NC, Greene County, NC, Halifax County, NC, Harnett County, NC, Hertford County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Sampson County, NC, Tyrrell County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Brunswick County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Chesapeake, VA, City of Colonial Heights, VA, City of Emporia, VA, City of Franklin, VA, City of Hampton, VA, City of Hopewell, VA, City of Newport News, VA, City of Norfolk, VA, City of Petersburg, VA, City of Poquoson, VA, City of Portsmouth, VA, City of Richmond, VA, City of Suffolk, VA, City of Virginia Beach, VA, City of Williamsburg, VA, Dinwiddie County, VA, Essex County, VA, Gloucester County, VA, Greensville County, VA, Hanover County, VA, Henrico County, VA, Isle of Wight County, VA, James City County, VA, King and Queen County, VA, King George County, VA, King William County, VA, Lancaster County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Prince George County, VA, Richmond County, VA, Southampton County, VA, Surry County, VA, Sussex County, VA, Westmoreland County, VA, York County, VA
The radar
The Norfolk radar (KAKQ), 85 km from the middle of the area, began a volume at 23:43 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
Newport, NC (KMHX), launched 12:00Z, 11.7 hours before the alert went out and 160 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
- 502 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 595 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 333 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted.
737
ACUS11 KWNS 242341
SWOMCD
SPC MCD 242340
VAZ000-NCZ000-MDZ000-250145-
MESOSCALE DISCUSSION 0151
NWS STORM PREDICTION CENTER NORMAN OK
0540 PM CST WED FEB 24 2016
AREAS AFFECTED...ERN NC...ERN VA INTO THE DELMARVA
CONCERNING...TORNADO WATCH 27...28...
VALID 242340Z - 250145Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 27...28...CONTINUES.
SUMMARY...THE THREAT FOR TORNADOES...DAMAGING WINDS AND ISOLATED
HAIL WILL PERSIST MAINLY FROM ERN VA INTO ERN NC.
DISCUSSION...A BROKEN LINE OF SUPERCELLS IS CURRENTLY ONGOING AHEAD
OF THE COLD FRONT. OBSERVED WIND SHEAR VIA RADAR IS EXTREME WITH
600-800 M2/S2 SRH IN THE LOWEST 1 KM ALONE WHICH STRONGLY FAVORS
ROTATING STORMS CAPABLE OF TORNADOES. GIVEN A SUFFICIENTLY MOIST AND
UNSTABLE AIR MASS WITH MUCAPE AROUND 1000 J/KG...AND CONTINUED LIFT
WITH THE LOW PRESSURE TROUGH...THE SEVERE THREAT IS EXPECTED TO
CONTINUE TOWARD THE ATLANTIC COAST. A FEW OF THE STRONGER STORM
CORES MAY ALSO PRODUCE HAIL.
..JEWELL.. 02/24/2016
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...AKQ...MHX...LWX...RAH...ILM...
LAT...LON 34477706 34407824 34727885 35447896 36577804 37707753
38587721 38457664 37947611 37387571 36137553 35617542
35167551 34477706SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 24, 1:18 PM EST | Mesoscale Discussion | SPC | Calvert, Charles, Prince George's, Saint Mary's | 117 min |
| Feb 24, 1:46 PM EST | Tornado Watch | SPC | Dorchester, Somerset, Wicomico, Worcester | 9 hr |
| Feb 24, 3:06 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 12 more | 54 min |
| Feb 24, 3:20 PM EST | Tornado Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 11 more | 8 hr |
| Feb 24, 4:46 PM EST | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Charles, Dorchester and 11 more | 89 min |
| Feb 24, 8:14 AM EST | Mesoscale Discussion | SPC | Avery, Buncombe, Cherokee, Clay, Graham, Haywood and 10 more | 2 hr |
| Feb 24, 10:46 AM EST | Mesoscale Discussion | SPC | Alamance, Alexander, Anson, Burke, Cabarrus, Caldwell and 36 more | 119 min |
| Feb 24, 11:16 AM EST | Mesoscale Discussion | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 28 more | 89 min |
| Feb 24, 11:16 AM EST | Tornado Watch | SPC | Alamance, Alexander, Anson, Bladen, Brunswick, Cabarrus and 52 more | 8 hr |
| Feb 24, 2:55 PM EST | Mesoscale Discussion | SPC | Alamance, Anson, Bladen, Brunswick, Caswell, Chatham and 28 more | 95 min |
| Feb 24, 6:50 PM EST | Tornado Watch | SPC | Beaufort, Bertie, Bladen, Brunswick, Camden, Carteret and 36 more | 4 hr |
Nearby
Mesoscale Discussions in Virginia, 2016Mesoscale Discussions in North Carolina, 2016Mesoscale Discussions in Maryland, 2016Every mesoscale discussion in 2016
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.