Alert archive / North Carolina / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 42, NWS Raleigh, NC

May 5, 2017Person County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 5, 2017, 4:16 AM EDT for Person County, North Carolina. It was in force for 59 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 5, 2017, 4:16 AM EDT (08:16 UTC)
Expired: May 5, 2017, 5:15 AM EDT
In force: 59 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Tornado: Possible
Hail: 0.75 in
Wind: 60.0 mph

County Person County, NC

The radar

The Raleigh/Durham radar (KRAX), 94 km from the middle of the area, began a volume at 08:16 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.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 24 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 5, 3:09 AM EDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 8.3 hours before the alert went out and 95 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

050 
WUUS52 KRAH 050816
SVRRAH
NCC145-050915-
/O.NEW.KRAH.SV.W.0042.170505T0816Z-170505T0915Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Raleigh NC
416 AM EDT FRI MAY 5 2017

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...
  Person County in central North Carolina...

* Until 515 AM EDT

* At 416 AM EDT, severe thunderstorms were located along a line
  extending from near Leasburg to near Mebane, moving northeast at 55
  mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* Locations impacted include...
  Roxboro, Concord, Bethel Hill, Bushy Fork, Hyco Lake, Mayo
  Reservoir and Hyco Marina.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Straight line winds can blow down trees, power lines, and damage
mobile homes and other buildings. Seek shelter in a sturdy structure
until the storm has passed. Stay away from windows as flying debris
generated by damaging winds can be deadly.

&&

A tornado watch remains in effect until 900 AM EDT for central North
Carolina.

LAT...LON 3651 7880 3624 7894 3624 7915 3654 7914
      3654 7880
TIME...MOT...LOC 0816Z 211DEG 48KT 3642 7920 3602 7927 

TORNADO...POSSIBLE
HAIL...<.75IN
WIND...60MPH
 
$$

26

3 follow-up statements

395 
WWUS52 KRAH 050842
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
442 AM EDT FRI MAY 5 2017

NCC145-050915-
/O.CON.KRAH.SV.W.0042.000000T0000Z-170505T0915Z/
Person NC-
442 AM EDT FRI MAY 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR PERSON COUNTY...

At 441 AM EDT, severe thunderstorms were located along a line
extending from near Alton to 6 miles northeast of Prospect Hill,
moving northeast at 45 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Roxboro, Bethel Hill, Mayo Reservoir and Bushy Fork. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Straight line winds can blow down trees, power lines, and damage
mobile homes and other buildings. Seek shelter in a sturdy structure
until the storm has passed. Stay away from windows as flying debris
generated by damaging winds can be deadly.

&&

A tornado watch remains in effect until 900 AM EDT for central North
Carolina.

LAT...LON 3651 7880 3624 7894 3624 7915 3631 7915
      3654 7901 3654 7880
TIME...MOT...LOC 0841Z 221DEG 41KT 3652 7896 3629 7909 

HAIL...<.75IN
WIND...60MPH
 
$$

26

862 
WWUS52 KRAH 050905
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
505 AM EDT FRI MAY 5 2017

NCC145-050915-
/O.CON.KRAH.SV.W.0042.000000T0000Z-170505T0915Z/
Person NC-
505 AM EDT FRI MAY 5 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 AM EDT
FOR NORTHEASTERN PERSON COUNTY...

At 504 AM EDT, a severe thunderstorm was located 7 miles northeast of
Roxboro, moving north at 40 mph.

HAZARD...60 mph wind gusts. 

SOURCE...Radar indicated. 

IMPACT...Expect damage to roofs, siding, and trees. 

Locations impacted include...
Bethel Hill and Mayo Reservoir. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Straight line winds can blow down trees, power lines, and damage
mobile homes and other buildings. Seek shelter in a sturdy structure
until the storm has passed. Stay away from windows as flying debris
generated by damaging winds can be deadly.

&&

A tornado watch remains in effect until 900 AM EDT for central North
Carolina.

LAT...LON 3638 7892 3654 7895 3654 7880 3651 7880
      3635 7888
TIME...MOT...LOC 0904Z 194DEG 34KT 3645 7886 

HAIL...<.75IN
WIND...60MPH
 
$$

26

968 
WWUS52 KRAH 050910
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
510 AM EDT FRI MAY 5 2017

NCC145-050920-
/O.EXP.KRAH.SV.W.0042.000000T0000Z-170505T0915Z/
Person NC-
510 AM EDT FRI MAY 5 2017

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PERSON COUNTY
WILL EXPIRE AT 515 AM EDT...
        
The storm which prompted the warning has moved out of the area.
Therefore the warning will be allowed to expire.

A tornado watch remains in effect until 900 AM EDT for central North
Carolina.

LAT...LON 3638 7892 3654 7895 3654 7880 3651 7880
      3635 7888
TIME...MOT...LOC 0910Z 211DEG 48KT 3649 7883 

$$

26

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Raleigh, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at May 5, 4:15 AM EDT, 1 minute earlier.

Area forecast discussion, May 5, 4:15 AM EDT, 1 minute before

Area Forecast Discussion
National Weather Service Raleigh NC
415 AM EDT Fri May 5 2017

.SYNOPSIS...
A strong cold front will surge east across the region this
morning, moving offshore by early afternoon. An upper level trough
will remain across the area through the weekend.

&&

.NEAR TERM /TODAY/...
As of 307 AM Friday...

New Tornado Watch for all but Forsyth... Davidson... and Stanly
Counties through 900 am... along and east of the main convective
bands.

Previous discussion issued at 237 am...

The isolated tornado risk will most likely be extended beyond the
current Tornado Watch time in our Coastal Plain counties. Widespread
showers/rain continued over the NW-N Piedmont keeping this region
relatively stable compared to the areas to the south and east of the
Triad. The juicy air with dew points at 70 was getting pulled
in from the Atlantic with the strong SE low level flow into the
current Tornado Watch area. This region, including the Coastal
Plain will be the main areas of concern as the bands of
showers/isolated thunderstorms move NE across the region this
morning. The Hi-Res HRRR has been keying in on a couple of bands of
convection that warrant attention. They were moving into our SW-S
Piedmont counties currently. A few damaging wind events and possibly
a tornado will be the main hazards. The threat may extend westward a
few counties from where the Tornado Watch is currently located (from
Albemarle to Raleigh to Roanoke Rapids and areas east.

The final band, associated with the cold front, will effective shut
down the isolated tornado/wind damage threat. Timing of that cold
front (which was at 200 am tracking through the GSP area of SC)
should be at or very near the Triangle and Fayetteville
around 12Z, then our far eastern Coastal Plain before noon.
This is supported by the latest Hi-Res guidance / operational
GFS/EC.

The mid level dry slot and cold front will end the main convection
as mentioned this morning. This afternoon, central NC will be in the
dry slot with variably cloudy skies. Highs generally 70-75. Winds
will shift to the SW behind the front at 15-25 mph with gusts to 30+
mph.

Tonight, expect partly to variable cloudy skies as the mid/upper low
tracks NNE up the spine of the central and northern Appalachians.
The only chance of showers appears to be near the Mountains or
closer to the upper low. Otherwise, POP will be NIL. Much cooler and
less humid - lows in the 40s.

&&

.SHORT TERM /SATURDAY THROUGH SATURDAY NIGHT/...
As of 410 AM Friday...

A second short wave and associated cold front digs into the east
coast trof Saturday night. This will squeeze out lingering moisture
to produce scattered showers, especially across the northern tier.
Activity will be ending Saturday night as the wave begins to lift
out. Highs will be on the cool side, 65 to 70, with mins Sunday
morning from 45 to 50.

&&

.LONG TERM /SUNDAY THROUGH THURSDAY/...
As of 415 AM EDT Friday...

Omega blocking pattern slowly deamplifies through mid week, with
fast northwest mid level flow into central NC producing mainly dry
weather and a very gradual warming trend. There could be a few
showers in the mid week as an impulse dives down the weakening ridge
and pushes a modest cold front south through the area. Highs Sunday
and Monday will range from 65 to 70...edging into the low and mid
70s from Tuesday through Thursday.

&&

.AVIATION /06Z FRIDAY THROUGH WEDNESDAY/...
As of 145 AM Friday...

24-Hour TAF period: IFR conditions, mainly ceilings, are expected
through around 12Z as widespread rain and embedded convective
elements move across central NC. Winds increase with height to 45kts
at 5K feet, so scattered showers and thunderstorms could produce
gusts as high as 35kts. Conditions will improve fairly quickly from
west to east...~12Z west to ~16Z in the east...as a cold front
sweeps out the moisture. Initial southeast winds sustained at 10-
15kts at issuance will veer to southerly by 12Z, then southwest by
15Z behind the front, and continue through 00Z with gust
diminishing thereafter.

Looking ahead: scattered showers and associated MVFR conditions may
re-develop again Saturday and Sunday aft/eve as the upper trough
over the eastern US amplifies in response to additional shortwave
energy pushing a reinforcing cold front across the area. VFR
conditions are anticipated Monday through Wednesday as the upper
trough lifts NE away from the region.

&&

.RAH WATCHES/WARNINGS/ADVISORIES...
None.

&&

SYNOPSIS...Badgett
NEAR TERM...Badgett
SHORT TERM...mlm
LONG TERM...mlm
AVIATION...MLM

Hazardous weather outlook, May 5, 3:17 AM EDT, 59 minutes before

Hazardous Weather Outlook
National Weather Service Raleigh NC
317 AM EDT Fri May 5 2017

NCZ007>011-022>028-039>043-074>078-083>086-088-089-060730-
Person-Granville-Vance-Warren-Halifax-Guilford-Alamance-Orange-
Durham-Franklin-Nash-Edgecombe-Randolph-Chatham-Wake-Johnston-Wilson-
Montgomery-Moore-Lee-Harnett-Wayne-Anson-Richmond-Scotland-Hoke-
Cumberland-Sampson-
317 AM EDT Fri May 5 2017

...TORNADO WATCH 195 IN EFFECT UNTIL 9 AM EDT THIS MORNING...

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Saturday through Thursday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotters are asked to call any severe weather reports to the
National Weather Service at 800 444 7928

In the hours before

Local storm report, May 5, 3:13 AM EDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
313 AM EDT FRI MAY 05 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0300 AM     TSTM WND DMG     4 ENE MARTHA            35.65N  79.95W
05/05/2017                   RANDOLPH           NC   911 CALL CENTER

            TREES DOWN ON MECHANIC RD... GRANVILLE RD... AND LOFLIN
            RD.

&&

EVENT NUMBER RAH1700461

MLM

Local storm report, May 5, 3:33 AM EDT, 43 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
333 AM EDT FRI MAY 05 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0245 AM     TSTM WND DMG     2 E GREENSBORO          36.07N  79.79W
05/05/2017                   GUILFORD           NC   BROADCAST MEDIA

            TREE DOWN ON EUGENE AND W FRIENDLY AVE

&&

EVENT NUMBER RAH1700462

MLM

Local storm report, May 5, 3:36 AM EDT, 40 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
336 AM EDT FRI MAY 05 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0314 AM     TSTM WND DMG     8 E GORDONTOWN          35.74N  79.98W
05/05/2017                   RANDOLPH           NC   BROADCAST MEDIA

            TREE REPORTED ON A HOME - 179 KINDLEY RD

&&

EVENT NUMBER RAH1700463

MLM

Local storm report, May 5, 3:39 AM EDT, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
339 AM EDT FRI MAY 05 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0320 AM     TSTM WND DMG     1 ENE MONTICELLO        36.21N  79.66W
05/05/2017                   GUILFORD           NC   BROADCAST MEDIA

            TREE REPORTED ON A HOME AT LANDIS AND JACKSON SCHOOL
            RDS IN BROWNS SUMMIT.

&&

EVENT NUMBER RAH1700464

MLM

Local storm report, May 5, 3:54 AM EDT, 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
354 AM EDT FRI MAY 05 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0340 AM     TSTM WND DMG     2 SW GREENSBORO         36.06N  79.85W
05/05/2017                   GUILFORD           NC   BROADCAST MEDIA

            TREE DOWN ACROSS ROAD AT WENDOVER AND HOLDEN ROADS.

&&

EVENT NUMBER RAH1700465

MLM

Local storm report, May 5, 3:56 AM EDT, 20 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
356 AM EDT FRI MAY 05 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0341 AM     TSTM WND DMG     3 N LAKE TOWNSEND       36.22N  79.79W
05/05/2017                   GUILFORD           NC   BROADCAST MEDIA

            TREE ON A HOME ON N CHURCH ST AT HWY 150 IN BROWNS
            SUMMIT

&&

EVENT NUMBER RAH1700466

MLM

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 4, 10:39 PM EDT	Special Weather Statement	RAH	Anson, Richmond	51 min
May 4, 11:59 PM EDT	Special Weather Statement	RAH	Hoke	31 min
May 5, 12:11 AM EDT	Special Weather Statement	RAH	Durham, Orange	49 min
May 5, 12:52 AM EDT	Special Weather Statement	RAH	Wilson	38 min
May 5, 1:35 AM EDT	Special Weather Statement	RAH	Sampson	40 min
May 5, 2:08 AM EDT	Severe Thunderstorm Warning	RAH	Anson, Montgomery, Stanly	52 min
May 5, 2:12 AM EDT	Severe Thunderstorm Warning	RAH	Anson, Montgomery, Richmond	63 min
May 5, 2:21 AM EDT	Tornado Warning	RAH	Davidson, Montgomery, Randolph	39 min
May 5, 2:26 AM EDT	Tornado Warning	RAH	Anson, Montgomery, Richmond, Stanly	40 min
May 5, 2:42 AM EDT	Severe Thunderstorm Warning	RAH	Davidson, Guilford, Randolph	63 min
May 5, 3:04 AM EDT	Severe Thunderstorm Warning	RAH	Chatham, Moore, Randolph	41 min
May 5, 3:32 AM EDT	Severe Thunderstorm Warning	RAH	Alamance	43 min
May 5, 3:45 AM EDT	Severe Thunderstorm Warning	RAH	Chatham, Lee, Moore	60 min
May 5, 3:50 AM EDT	Severe Thunderstorm Warning	RAH	Harnett, Hoke, Lee, Moore	40 min
May 5, 4:06 AM EDT	Severe Thunderstorm Warning	RAH	Chatham, Orange	42 min
May 5, 4:29 AM EDT	Severe Thunderstorm Warning	RAH	Durham, Person, Wake	61 min
May 5, 4:35 AM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Sampson	40 min
May 5, 4:56 AM EDT	Severe Thunderstorm Warning	RAH	Granville	37 min
May 5, 5:11 AM EDT	Severe Thunderstorm Warning	RAH	Sampson	49 min
May 5, 5:16 AM EDT	Severe Thunderstorm Warning	RAH	Vance	44 min
May 5, 5:19 AM EDT	Severe Thunderstorm Warning	RAH	Johnston	41 min
May 5, 5:29 AM EDT	Special Weather Statement	RAH	Franklin, Harnett, Wake	61 min
May 5, 5:42 AM EDT	Severe Thunderstorm Warning	RAH	Wayne, Wilson	63 min
May 5, 5:46 AM EDT	Special Weather Statement	RAH	Warren	44 min
May 5, 5:53 AM EDT	Severe Thunderstorm Warning	RAH	Franklin, Nash	52 min
May 5, 6:17 AM EDT	Severe Thunderstorm Warning	RAH	Halifax, Warren	43 min
May 5, 6:21 AM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Halifax	35 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2017 Every severe thunderstorm warning 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.