Alert archive / Virginia / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 211, NWS Wakefield, VA
NWS Wakefield, VA issued this severe thunderstorm warning at Jul 17, 2009, 12:46 PM EDT for Lunenburg County, Virginia. It was in force for 44 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 17, 2009, 12:46 PM EDT (16:46 UTC)
- Expired
- Jul 17, 2009, 1:30 PM EDT
- In force
- 44 min
- Issued by
- NWS Wakefield, VA
- Area
- Storm-based polygon
County Lunenburg County, VA
The radar
The Norfolk radar (KAKQ), 110 km from the middle of the area, began a volume at 16:48 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 17, 10:29 AM EDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Roanoke, VA (KRNK), launched 12:00Z, 4.8 hours before the alert went out and 115 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
- 1643 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 578 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 76 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 4.6
The office that day
Everything else NWS Wakefield, VA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 4:21 AM EDT | Small Craft Advisory | AKQ | 26 hr | |
| Jul 17, 11:45 AM EDT | Severe Thunderstorm Warning | AKQ | Cumberland, Lunenburg, Prince Edward | 60 min |
| Jul 17, 12:38 PM EDT | Severe Thunderstorm Warning | AKQ | Lunenburg, Nottoway, Prince Edward | 52 min |
| Jul 17, 1:26 PM EDT | Severe Thunderstorm Warning | AKQ | Brunswick, Dinwiddie, Greensville, Lunenburg, Nottoway | 49 min |
| Jul 17, 1:30 PM EDT | Severe Thunderstorm Warning | AKQ | Amelia, Chesterfield, Dinwiddie, Nottoway | 45 min |
| Jul 17, 2:08 PM EDT | Severe Thunderstorm Warning | AKQ | Dinwiddie, Greensville, Southampton, Sussex | 52 min |
| Jul 17, 2:35 PM EDT | Severe Thunderstorm Warning | AKQ | Brunswick, Greensville | 40 min |
| Jul 17, 3:03 PM EDT | Severe Thunderstorm Warning | AKQ | Isle of Wight, Southampton, Sussex, City of Franklin | 42 min |
| Jul 17, 3:32 PM EDT | Special Marine Warning | AKQ | 58 min | |
| Jul 17, 3:36 PM EDT | Severe Thunderstorm Warning | AKQ | Southampton | 39 min |
| Jul 17, 3:39 PM EDT | Severe Thunderstorm Warning | AKQ | Isle of Wight, Southampton, City of Chesapeake, City of Portsmouth, City of Suffolk | 51 min |
| Jul 17, 4:19 PM EDT | Severe Thunderstorm Warning | AKQ | City of Chesapeake, City of Norfolk, City of Virginia Beach | 56 min |
| Jul 17, 4:33 PM EDT | Special Marine Warning | AKQ | 87 min | |
| Jul 17, 5:35 PM EDT | Special Marine Warning | AKQ | 85 min | |
| Jul 17, 7:54 PM EDT | Severe Thunderstorm Warning | AKQ | Mecklenburg | 36 min |
| Jul 17, 5:33 PM EDT | Severe Thunderstorm Warning | AKQ | Camden, Currituck, Pasquotank, Perquimans | 57 min |
Nearby
Severe Thunderstorm Warnings in Virginia, 2009Every severe thunderstorm warning in 2009
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.