Alert archive / Virginia / Severe Thunderstorm Watches in 2016

Severe Thunderstorm Watch 262

June 16, 201651 counties in Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jun 16, 2016, 8:03 PM EDT for 51 counties in Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jun 16, 2016, 8:03 PM EDT (00:03 UTC)
Expired
Jun 17, 2016, 1:40 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
60 kt
All 51 counties

Amelia County, VA, 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, Cumberland County, VA, Dinwiddie County, VA, Essex County, VA, Fluvanna County, VA, Gloucester County, VA, Goochland 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 William County, VA, Lancaster County, VA, Louisa County, VA, Lunenburg County, VA, Mathews County, VA, Mecklenburg County, VA, Middlesex County, VA, New Kent County, VA, Northumberland County, VA, Nottoway County, VA, Powhatan County, VA, Prince Edward 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), 95 km from the middle of the area, began a volume at 00:04 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
10%
One or more EF2 to EF5 tornadoes
2%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
10%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 16, 8:11 PM EDTSevere Thunderstorm WarningAKQFluvanna, Goochland, Louisa49 min
Jun 16, 8:27 PM EDTSevere Thunderstorm WarningAKQCaroline, Hanover48 min
Jun 16, 8:38 PM EDTSevere Thunderstorm WarningAKQCumberland, Fluvanna, Goochland52 min
Jun 16, 8:55 PM EDTSevere Thunderstorm WarningAKQCaroline, Essex, Fluvanna, Goochland, Hanover, King William and 2 more50 min
Jun 16, 8:57 PM EDTTornado WarningAKQCaroline, Hanover33 min
Jun 16, 9:15 PM EDTSevere Thunderstorm WarningAKQChesterfield, Goochland, Hanover, Henrico, New Kent, Powhatan and 1 more45 min
Jun 16, 9:25 PM EDTFlash Flood WarningAKQCaroline, Hanover4 hr
Jun 16, 9:37 PM EDTSevere Thunderstorm WarningAKQCaroline, Essex, Hanover, King and Queen, King William, Lancaster and 4 more53 min
Jun 16, 9:46 PM EDTTornado WarningAKQCharles City, Hanover, Henrico, New Kent, City of Richmond29 min
Jun 16, 9:58 PM EDTSevere Thunderstorm WarningAKQCharles City, Chesterfield, Gloucester, Hanover, Henrico, James City and 4 more47 min
Jun 16, 10:22 PM EDTSevere Thunderstorm WarningAKQAmelia, Charles City, Chesterfield, Dinwiddie, James City, Prince George and 4 more23 min
Jun 16, 10:28 PM EDTSevere Thunderstorm WarningAKQCharles City, Chesterfield, Essex, Gloucester, Henrico, James City and 11 more62 min
Jun 16, 10:34 PM EDTSevere Thunderstorm WarningAKQAmelia, Cumberland, Nottoway41 min
Jun 16, 10:46 PM EDTSevere Thunderstorm WarningAKQCharles City, Dinwiddie, James City, Prince George, Surry, Sussex and 6 more44 min
Jun 16, 11:03 PM EDTSevere Thunderstorm WarningAKQAmelia, Dinwiddie, Nottoway28 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

Washington/Dulle, VA (KIAD), launched 00:00Z, 0.1 hours before the alert went out and 131 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, Washington/Dulle, VA at 00:00Z on 2016-06-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 876 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, Washington/Dulle, VA at 00:00Z on 2016-06-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 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
876 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
797 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
74 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 16, 9:21 PM EDTMesoscale DiscussionSPCAnne Arundel, Charles, Prince George's54 min

Nearby

Severe Thunderstorm Watches in Virginia, 2016Every severe thunderstorm watch 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.