Alert archive / North Carolina / Tornado Watches in 2013

Tornado Watch 25

January 30, 201341 counties in North Carolina; 8 counties in South Carolina; 33 counties in Virginia

The Storm Prediction Center issued this tornado watch at Jan 30, 2013, 8:21 PM EST for 41 counties in North Carolina; 8 counties in South Carolina; 33 counties in Virginia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jan 30, 2013, 8:21 PM EST (01:21 UTC)
Expired
Jan 31, 2013, 2:00 AM EST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
0.5 in
Strongest gust expected
65 kt
All 82 counties

Alamance County, NC, Anson County, NC, Bladen County, NC, Brunswick County, NC, Caswell County, NC, Chatham County, NC, Columbus County, NC, Cumberland County, NC, Davidson County, NC, Durham County, NC, Edgecombe County, NC, Forsyth County, NC, Franklin County, NC, Granville County, NC, Guilford County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Nash County, NC, New Hanover County, NC, Northampton County, NC, Orange County, NC, Pender County, NC, Person County, NC, Randolph County, NC, Richmond County, NC, Robeson County, NC, Rockingham County, NC, Sampson County, NC, Scotland County, NC, Stanly County, NC, Stokes 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, Amelia County, VA, Appomattox County, VA, Brunswick County, VA, Buckingham County, VA, Campbell County, VA, Charles City County, VA, Charlotte County, VA, Chesterfield County, VA, City of Colonial Heights, VA, City of Danville, VA, City of Emporia, VA, City of Franklin, VA, City of Hopewell, VA, City of Lynchburg, VA, City of Martinsville, VA, City of Petersburg, VA, City of Richmond, VA, Cumberland County, VA, Dinwiddie County, VA, Greensville County, VA, Halifax County, VA, Henrico County, VA, Henry County, VA, Lunenburg County, VA, Mecklenburg County, VA, New Kent County, VA, Nottoway County, VA, Pittsylvania County, VA, Powhatan County, VA, Prince Edward County, VA, Prince George County, VA, Southampton County, VA, Sussex County, VA

The radar

The Raleigh/Durham radar (KRAX), 60 km from the middle of the area, began a volume at 01:22 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
30%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
95%
One or more gusts of 65 knots or more
30%
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
95%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jan 30, 8:22 PM ESTSevere Thunderstorm WarningRNKRockingham, Stokes53 min
Jan 30, 8:45 PM ESTSevere Thunderstorm WarningRAHAnson, Montgomery, Richmond, Stanly60 min
Jan 30, 8:48 PM ESTSevere Thunderstorm WarningRAHGuilford, Randolph57 min
Jan 30, 9:11 PM ESTSevere Thunderstorm WarningRNKCaswell, Rockingham64 min
Jan 30, 9:40 PM ESTSevere Thunderstorm WarningRAHAlamance, Chatham, Guilford, Orange, Randolph80 min
Jan 30, 9:45 PM ESTSevere Thunderstorm WarningILMDarlington, Florence, Marlboro60 min
Jan 30, 9:46 PM ESTSevere Thunderstorm WarningRAHAnson, Montgomery, Moore, Richmond, Stanly59 min
Jan 30, 10:21 PM ESTSevere Thunderstorm WarningRAHGranville, Person54 min
Jan 30, 10:29 PM ESTSevere Thunderstorm WarningILMFlorence, Williamsburg61 min
Jan 30, 10:42 PM ESTSevere Thunderstorm WarningILMDarlington, Dillon, Florence, Marion, Marlboro63 min
Jan 30, 11:06 PM ESTSevere Thunderstorm WarningILMBladen, Robeson54 min
Jan 30, 11:25 PM ESTSevere Thunderstorm WarningILMDillon, Florence, Georgetown, Horry, Marion, Williamsburg80 min
Jan 30, 11:57 PM ESTSevere Thunderstorm WarningILMBladen, Brunswick, Columbus, Robeson63 min
Jan 31, 12:39 AM ESTSevere Thunderstorm WarningRAHJohnston, Sampson, Wayne, Wilson51 min
Jan 31, 12:44 AM ESTSevere Thunderstorm WarningILMBladen, Brunswick, Columbus, New Hanover, Pender61 min
Jan 31, 12:50 AM ESTSevere Thunderstorm WarningILMBladen, Brunswick, Columbus, New Hanover, Pender55 min
Jan 31, 1:39 AM ESTSevere Thunderstorm WarningILMBrunswick, New Hanover, Pender21 min
Jan 31, 1:47 AM ESTSevere Thunderstorm WarningAKQCharles City, Gloucester, Isle of Wight, James City, Mathews, Southampton and 8 more43 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, 1.4 hours before the alert went out and 76 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 2013-01-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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 2013-01-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 457 square meters per square second.1939587897117Sfc1 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
3 J/kg
Mixed-layer CIN
-75 J/kg
Mixed-layer LCL
1052 m above ground
0-6 km bulk shear
75 kt
0-1 km storm-relative helicity
457 m²/s²
0-3 km storm-relative helicity
630 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

878 
WWUS20 KWNS 310126
SEL5  
SPC WW 310126
NCZ000-SCZ000-VAZ000-310700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 25
NWS STORM PREDICTION CENTER NORMAN OK
820 PM EST WED JAN 30 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       CENTRAL AND EASTERN NORTH CAROLINA
       EASTERN SOUTH CAROLINA
       SOUTH CENTRAL AND SOUTHEASTERN VIRGINIA

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 820 PM
UNTIL 200 AM EST.

TORNADOES...HAIL TO 0.5 INCH IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTH OF SOUTH HILL
VIRGINIA TO 50 MILES SOUTH SOUTHWEST OF FLORENCE SOUTH CAROLINA. 
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU5).

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 SEVERE
THUNDERSTORM WATCH NUMBER 22. WATCH NUMBER 22 WILL NOT BE IN
EFFECT AFTER 820 PM EST. CONTINUE...WW 23...WW 24...

DISCUSSION...NNE/SSW PRE-FRONTAL SQLN THROUGH CNTRL NC EXPECTED TO
ACCELERATE ENE THROUGH EARLY THU AS TN VLY SHORTWAVE TROUGH EJECTS
NE TOWARD REGION. STRENGTHENING FRONTAL CIRCULATION DOWNSTREAM FROM
TROUGH MAY COMPENSATE FOR WEAK BUOYANCY TO MAINTAIN FORCED
CONVECTIVE BAND ACROSS THE NC/VA PIEDMONT AND INTO WRN PORTIONS OF
THE ADJACENT CSTL PLN. AREA VWP DATA SHOW VERY STRONG WIND PROFILES
ACROSS REGION...AND FURTHER STRENGTHENING MAY OCCUR /WITH 850 MB
FLOW UP TO 80 KTS/. THUS...POTENTIAL WILL EXIST FOR EMBEDDED LEWPS
POSING A RISK FOR SPORADIC DMGG WINDS AND ISOLD
TORNADOES...ESPECIALLY NEAR LEWP CRESTS AND/OR LINE BREAKS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
350. MEAN STORM MOTION VECTOR 22060.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jan 30, 7:09 PM ESTMesoscale DiscussionSPCAlleghany, Caswell, Forsyth, Guilford, Rockingham, Stokes and 3 more66 min
Jan 30, 7:56 PM ESTMesoscale DiscussionSPCAlamance, Anson, Cabarrus, Chatham, Cumberland, Davidson and 28 more94 min
Jan 30, 10:42 PM ESTMesoscale DiscussionSPCBertie, Bladen, Chatham, Chowan, Columbus, Cumberland and 29 more93 min
Jan 30, 11:59 PM ESTTornado WatchSPCBeaufort, Bertie, Camden, Carteret, Chowan, Craven and 17 more5 hr
Jan 31, 12:52 AM ESTMesoscale DiscussionSPCBeaufort, Bertie, Bladen, Brunswick, Camden, Chowan and 29 more83 min
Jan 31, 3:40 AM ESTMesoscale DiscussionSPCDare, Hyde65 min
Jan 30, 8:44 PM ESTMesoscale DiscussionSPCBeaufort, Berkeley, Charleston, Colleton, Dorchester, Jasper61 min
Jan 30, 8:56 PM ESTTornado WatchSPCBeaufort, Berkeley, Charleston, Colleton, Dorchester, Hampton and 1 more3 hr
Jan 30, 9:38 PM ESTMesoscale DiscussionSPCAlbemarle, Arlington, Buckingham, Caroline, Clarke, Culpeper and 27 more67 min

Nearby

Tornado Watches in North Carolina, 2013Tornado Watches in Virginia, 2013Tornado Watches in South Carolina, 2013Every tornado watch in 2013

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.