Alert archive / Virginia / Severe Thunderstorm Watches in 2008

Severe Thunderstorm Watch 554

June 16, 20084 counties in Maryland; 35 counties in Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 16, 2008, 4:35 PM EDT for 4 counties in Maryland; 35 counties in Virginia. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Jun 16, 2008, 4:35 PM EDT (20:35 UTC)
Expired
Jun 16, 2008, 7:48 PM EDT
In force
3 hr
Issued by
the Storm Prediction Center
All 39 counties

Dorchester County, MD, Somerset County, MD, Wicomico County, MD, Worcester County, MD, Accomack County, VA, Amelia County, VA, Caroline County, VA, Charles City County, VA, Chesterfield County, VA, City of Colonial Heights, VA, City of Hopewell, VA, City of Petersburg, VA, City of Richmond, VA, City of Williamsburg, VA, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Fluvanna County, VA, Gloucester County, VA, Goochland County, VA, Hanover County, VA, Henrico County, VA, James City County, VA, King and Queen County, VA, King William County, VA, Lancaster County, VA, Louisa County, VA, Mathews County, VA, Middlesex County, VA, New Kent County, VA, Northampton County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Richmond County, VA, Westmoreland County, VA, York County, VA

The radar

The Sterling radar (KLWX), 103 km from the middle of the area, began a volume at 20:38 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.

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jun 16, 4:42 PM EDTSevere Thunderstorm WarningAKQCaroline, Hanover, Louisa63 min
Jun 16, 4:59 PM EDTSevere Thunderstorm WarningAKQDorchester61 min
Jun 16, 5:12 PM EDTSevere Thunderstorm WarningAKQCaroline, Essex, Hanover, King and Queen, King William, Richmond and 1 more63 min
Jun 16, 5:47 PM EDTSevere Thunderstorm WarningAKQGoochland, Hanover, Henrico, King William, Powhatan, City of Richmond33 min
Jun 16, 5:53 PM EDTSevere Thunderstorm WarningAKQEssex, King and Queen, Lancaster, Middlesex, Northumberland, Richmond and 1 more52 min
Jun 16, 6:05 PM EDTSevere Thunderstorm WarningAKQSomerset, Wicomico, Worcester55 min
Jun 16, 6:08 PM EDTSevere Thunderstorm WarningAKQCharles City, Chesterfield, Gloucester, Hanover, Henrico, James City and 10 more52 min
Jun 16, 6:22 PM EDTSevere Thunderstorm WarningAKQGloucester, Lancaster, Mathews, Middlesex, Northumberland38 min
Jun 16, 6:49 PM EDTSevere Thunderstorm WarningAKQAccomack, Northampton56 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.6 hours before the alert went out and 182 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.

Skew-T log-pSkew-T log-p diagram, Phillips Aaf/Abe, MD at 12:00Z on 2008-06-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 53 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2008-06-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
53 J/kg
Mixed-layer CIN
-151 J/kg
Mixed-layer LCL
1872 m above ground
0-6 km bulk shear
25 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
28 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 12:54 PM EDTMesoscale DiscussionSPCKent, New Castle, Sussex2 hr
Jun 16, 1:21 PM EDTSevere Thunderstorm WatchSPCKent, New Castle, Sussex10 hr
Jun 16, 6:55 PM EDTMesoscale DiscussionSPCKent, Sussex95 min
Jun 16, 11:28 AM EDTSevere Thunderstorm WatchSPCGarrett10 hr
Jun 16, 9:09 AM EDTSevere Thunderstorm WatchSPCBuchanan, Dickenson12 hr
Jun 16, 11:46 AM EDTMesoscale DiscussionSPCBath, Highland59 min
Jun 16, 4:51 PM EDTSevere Thunderstorm WatchSPCBland, Buchanan, Dickenson, Giles, Lee, Montgomery and 10 more6 hr

Nearby

Severe Thunderstorm Watches in Virginia, 2008Severe Thunderstorm Watches in Maryland, 2008Every severe thunderstorm watch in 2008

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.