Alert archive / North Carolina / Severe Thunderstorm Watches in 2014

Severe Thunderstorm Watch 410

July 10, 201443 counties in North Carolina; 8 counties in South Carolina; 10 counties in Virginia

The Storm Prediction Center issued this severe thunderstorm watch at Jul 10, 2014, 1:34 PM EDT for 43 counties in North Carolina; 8 counties in South Carolina; 10 counties in Virginia. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jul 10, 2014, 1:34 PM EDT (17:34 UTC)
Expired
Jul 10, 2014, 9:00 PM EDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 61 counties

Beaufort County, NC, Bertie County, NC, Bladen County, NC, Brunswick County, NC, Camden County, NC, Chowan County, NC, Columbus 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, Hoke County, NC, Hyde County, NC, Johnston County, NC, Jones County, NC, Lenoir County, NC, Martin County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Onslow County, NC, Pamlico County, NC, Pasquotank County, NC, Pender County, NC, Perquimans County, NC, Pitt County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Tyrrell County, NC, Wake County, NC, Warren County, NC, Washington County, NC, Wayne County, NC, Wilson County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Georgetown County, SC, Horry County, SC, Marion County, SC, Marlboro County, SC, Williamsburg County, SC, City of Chesapeake, VA, City of Franklin, VA, City of Hampton, VA, City of Newport News, VA, City of Norfolk, VA, City of Portsmouth, VA, City of Suffolk, VA, City of Virginia Beach, VA, Isle of Wight County, VA, Southampton County, VA

The radar

The Raleigh/Durham radar (KRAX), 100 km from the middle of the area, began a volume at 17:33 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
60%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
30%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 10, 1:53 PM EDTSevere Thunderstorm WarningAKQIsle of Wight, City of Chesapeake, City of Suffolk52 min
Jul 10, 2:01 PM EDTSevere Thunderstorm WarningAKQBertie, Camden, Chowan, Gates, Hertford, Pasquotank and 1 more34 min
Jul 10, 2:06 PM EDTSevere Thunderstorm WarningILMBladen, Columbus, Robeson54 min
Jul 10, 2:15 PM EDTSevere Thunderstorm WarningAKQHertford, Northampton17 min
Jul 10, 2:34 PM EDTSevere Thunderstorm WarningILMColumbus41 min
Jul 10, 2:53 PM EDTSevere Thunderstorm WarningAKQCity of Chesapeake, City of Norfolk, City of Virginia Beach52 min
Jul 10, 3:09 PM EDTSevere Thunderstorm WarningILMBladen, Columbus51 min
Jul 10, 5:19 PM EDTSevere Thunderstorm WarningRAHWake41 min
Jul 10, 5:36 PM EDTSevere Thunderstorm WarningRAHJohnston, Wake39 min
Jul 10, 5:36 PM EDTSevere Thunderstorm WarningRAHChatham, Lee, Wake35 min
Jul 10, 6:02 PM EDTSevere Thunderstorm WarningRAHFranklin, Nash28 min
Jul 10, 6:30 PM EDTSevere Thunderstorm WarningILMHorry, Marion45 min
Jul 10, 7:15 PM EDTSevere Thunderstorm WarningILMBladen, Columbus49 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

Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 5.6 hours before the alert went out and 225 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, Greensboro/Hi Pt, NC at 12:00Z on 2014-07-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 340 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, Greensboro/Hi Pt, NC at 12:00Z on 2014-07-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 square meters per square second.193958Sfc1 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
340 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
1039 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
62 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 10, 12:53 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Chowan and 32 more67 min
Jul 10, 4:15 PM EDTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Camden, Chowan, Columbus and 30 more60 min

Nearby

Severe Thunderstorm Watches in North Carolina, 2014Severe Thunderstorm Watches in Virginia, 2014Severe Thunderstorm Watches in South Carolina, 2014Every severe thunderstorm watch in 2014

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.