Alert archive / Virginia / Mesoscale Discussions in 2010
Mesoscale Discussion 830
The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2010, 2:38 PM EDT for 10 states. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Jun 6, 2010, 2:38 PM EDT (18:38 UTC)
- Expired
- Jun 6, 2010, 3:45 PM EDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
All 107 counties
Kent County, DE, New Castle County, DE, Sussex County, DE, Berkshire County, MA, Essex County, MA, Franklin County, MA, Hampden County, MA, Hampshire County, MA, Middlesex County, MA, Norfolk County, MA, Suffolk County, MA, Worcester County, MA, Anne Arundel County, MD, Calvert County, MD, Caroline County, MD, Cecil County, MD, Charles County, MD, City of Baltimore, MD, Dorchester County, MD, Harford County, MD, Kent County, MD, Prince George's County, MD, Queen Anne's County, MD, Saint Mary's County, MD, Somerset County, MD, Talbot County, MD, Wicomico County, MD, Cheshire County, NH, Hillsborough County, NH, Merrimack County, NH, Rockingham County, NH, Sullivan County, NH, Atlantic County, NJ, Bergen County, NJ, Burlington County, NJ, Camden County, NJ, Cape May County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth County, NJ, Morris County, NJ, Ocean County, NJ, Passaic County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Bronx County, NY, Columbia County, NY, Dutchess County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Rensselaer County, NY, Richmond County, NY, Rockland County, NY, Suffolk County, NY, Ulster County, NY, Westchester County, NY, Bucks County, PA, Chester County, PA, Delaware County, PA, Lehigh County, PA, Montgomery County, PA, Northampton County, PA, Philadelphia County, PA, Bristol County, RI, Kent County, RI, Providence County, RI, Albemarle County, VA, Arlington County, VA, Caroline County, VA, City of Alexandria, VA, City of Charlottesville, VA, City of Fairfax, VA, City of Falls Church, VA, City of Fredericksburg, VA, City of Manassas, VA, City of Manassas Park, VA, Culpeper County, VA, Essex County, VA, Fairfax County, VA, Greene County, VA, King and Queen County, VA, King George County, VA, Lancaster County, VA, Louisa County, VA, Madison County, VA, Northumberland County, VA, Orange County, VA, Prince William County, VA, Richmond County, VA, Spotsylvania County, VA, Stafford County, VA, Westmoreland County, VA, Bennington County, VT, Windham County, VT, Windsor County, VT
The radar
The Philadelphia radar (KDIX), 49 km from the middle of the area, began a volume at 18:40 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, 6.6 hours before the alert went out and 204 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
- 321 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1051 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 95 m²/s²
- 0-3 km storm-relative helicity
- 132 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
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 |
|---|---|---|---|---|
| Jun 6, 10:25 AM EDT | Mesoscale Discussion | SPC | 65 min | |
| Jun 6, 11:08 AM EDT | Tornado Watch | SPC | Greater Bridgeport Planning Region, Capitol Planning Region, Northwest Hills Planning Region, Lower Connecticut River Valley Planning Region, Naugatuck Valley Planning Region, Southeastern Connecticut Planning Region and 1 more | 8 hr |
| Jun 6, 11:42 AM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 63 min |
| Jun 6, 12:40 PM EDT | Tornado Watch | SPC | Kent, New Castle, Sussex | 6 hr |
| Jun 6, 7:05 AM EDT | Mesoscale Discussion | SPC | Garrett | 115 min |
| Jun 6, 7:51 AM EDT | Tornado Watch | SPC | Garrett | 7 hr |
| Jun 6, 2:03 AM EDT | Tornado Watch | SPC | Cattaraugus, Chautauqua | 7 hr |
| Jun 6, 3:38 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Chemung, Erie, Genesee and 9 more | 2 hr |
| Jun 6, 12:30 AM EDT | Mesoscale Discussion | SPC | Crawford, Erie | 3 hr |
Nearby
Mesoscale Discussions in Virginia, 2010Mesoscale Discussions in New Jersey, 2010Mesoscale Discussions in Maryland, 2010Every mesoscale discussion in 2010
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.