Alert archive / North Carolina / Tornado Watches in 2017

Tornado Watch 195

May 5, 201743 counties in North Carolina; 8 counties in South Carolina

The Storm Prediction Center issued this tornado watch at May 5, 2017, 3:09 AM EDT for 43 counties in North Carolina; 8 counties in South Carolina. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 5, 2017, 3:09 AM EDT (07:09 UTC)
Expired
May 5, 2017, 9:00 AM EDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
0.5 in
Strongest gust expected
60 kt
All 51 counties

Alamance County, NC, Anson County, NC, Bladen County, NC, Brunswick County, NC, Carteret County, NC, Chatham County, NC, Columbus County, NC, Craven County, NC, Cumberland County, NC, Duplin County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Greene County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Jones County, NC, Lee County, NC, Lenoir County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Onslow County, NC, Orange County, NC, Pamlico County, NC, Pender County, NC, Person County, NC, Pitt County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Sampson County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren 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

The radar

The Raleigh/Durham radar (KRAX), 60 km from the middle of the area, began a volume at 07:10 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
10%
Ten or more severe hail reports
5%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
50%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
May 5, 3:32 AM EDTSevere Thunderstorm WarningRAHAlamance43 min
May 5, 3:45 AM EDTSevere Thunderstorm WarningRAHChatham, Lee, Moore60 min
May 5, 3:50 AM EDTSevere Thunderstorm WarningRAHHarnett, Hoke, Lee, Moore40 min
May 5, 4:04 AM EDTSevere Thunderstorm WarningILMDillon, Horry, Marion26 min
May 5, 4:06 AM EDTSevere Thunderstorm WarningRAHChatham, Orange42 min
May 5, 4:11 AM EDTSevere Thunderstorm WarningILMBladen, Columbus, Robeson64 min
May 5, 4:16 AM EDTSevere Thunderstorm WarningRAHPerson59 min
May 5, 4:29 AM EDTSevere Thunderstorm WarningRAHDurham, Person, Wake61 min
May 5, 4:35 AM EDTSevere Thunderstorm WarningRAHCumberland, Sampson40 min
May 5, 4:36 AM EDTTornado WarningILMNew Hanover, Pender24 min
May 5, 4:55 AM EDTTornado WarningILMBladen, Columbus20 min
May 5, 4:56 AM EDTSevere Thunderstorm WarningRAHGranville37 min
May 5, 5:11 AM EDTSevere Thunderstorm WarningRAHSampson49 min
May 5, 5:13 AM EDTTornado WarningILMPender32 min
May 5, 5:16 AM EDTSevere Thunderstorm WarningRAHVance44 min
May 5, 5:18 AM EDTTornado WarningMHXOnslow42 min
May 5, 5:19 AM EDTSevere Thunderstorm WarningRAHJohnston41 min
May 5, 5:29 AM EDTTornado WarningMHXCraven, Jones, Pitt31 min
May 5, 5:42 AM EDTSevere Thunderstorm WarningRAHWayne, Wilson63 min
May 5, 5:53 AM EDTSevere Thunderstorm WarningRAHFranklin, Nash52 min
May 5, 5:55 AM EDTTornado WarningMHXJones, Onslow35 min
May 5, 6:17 AM EDTTornado WarningMHXBeaufort, Martin, Pitt, Washington43 min
May 5, 6:17 AM EDTSevere Thunderstorm WarningRAHHalifax, Warren43 min
May 5, 6:21 AM EDTSevere Thunderstorm WarningRAHEdgecombe, Halifax35 min
May 5, 6:28 AM EDTTornado WarningMHXBeaufort, Craven, Jones, Pitt32 min
May 5, 7:03 AM EDTTornado WarningMHXBeaufort, Craven, Pitt42 min
May 5, 7:19 AM EDTSevere Thunderstorm WarningMHXCarteret, Craven, Jones, Onslow, Pamlico41 min
May 5, 7:55 AM EDTSevere Thunderstorm WarningMHXCarteret, Craven, Pamlico50 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 00:00Z, 7.2 hours before the alert went out and 151 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 00:00Z on 2017-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 65 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 00:00Z on 2017-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 262 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
65 J/kg
Mixed-layer CIN
-32 J/kg
Mixed-layer LCL
1319 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
262 m²/s²
0-3 km storm-relative helicity
483 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

Open this sounding in Storm Lab

The text

As transmitted.

659 
WWUS20 KWNS 050703
SEL5  
SPC WW 050703
NCZ000-SCZ000-CWZ000-051300-

URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 195
NWS Storm Prediction Center Norman OK
305 AM EDT Fri May 5 2017

The NWS Storm Prediction Center has issued a

* Tornado Watch for portions of 
  Parts of central and eastern North Carolina
  Northeastern South Carolina
  Coastal Waters

* Effective this Friday morning from 305 AM until 900 AM EDT.

* Primary threats include...
  A couple tornadoes possible
  Isolated damaging wind gusts to 70 mph possible

SUMMARY...Broken bands of storms will spread northeastward into
central/eastern North Carolina and northeastern South Carolina
through the morning.  The storm environment will be favorable for a
continued risk for embedded rotating storms and line segments
capable of producing a couple of tornadoes and damaging gusts.

The tornado watch area is approximately along and 75 statute miles
east and west of a line from 35 miles northeast of Raleigh NC to 25
miles east southeast of Myrtle Beach SC. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU5).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.

&&

OTHER WATCH INFORMATION...This tornado watch replaces tornado
watch number 194. Watch number 194 will not be in effect after
305 AM EDT. 

AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 0.5 inches. Extreme turbulence and surface wind
gusts to 60 knots. A few cumulonimbi with maximum tops to 400. Mean
storm motion vector 21040.

...Thompson

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 4, 8:49 PM EDTTornado WatchSPCBladen, Brunswick, Carteret, Columbus, Craven, Cumberland and 13 more6 hr
May 4, 11:24 PM EDTMesoscale DiscussionSPCBladen, Brunswick, Columbus, Duplin, Greene, Jones and 7 more66 min
May 5, 2:28 AM EDTMesoscale DiscussionSPCAlamance, Beaufort, Bertie, Bladen, Camden, Caswell and 43 more92 min
May 5, 5:56 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Chowan, Currituck, Dare and 12 more94 min
May 5, 6:25 AM EDTTornado WatchSPCBeaufort, Bertie, Camden, Chowan, Currituck, Dare and 9 more5 hr
May 5, 8:27 AM EDTMesoscale DiscussionSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 9 more93 min
May 5, 6:15 PM EDTMesoscale DiscussionSPCHalifax, Hertford, Northampton90 min

Nearby

Tornado Watches in North Carolina, 2017Tornado Watches in South Carolina, 2017Every tornado watch in 2017

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.