Severe Thunderstorm Warning 74, NWS Raleigh, NC

961 
WWUS52 KRAH 252001
SVSRAH

Severe Weather Statement
National Weather Service Raleigh NC
401 PM EDT THU MAY 25 2017

NCC069-252010-
/O.CAN.KRAH.SV.W.0074.000000T0000Z-170525T2015Z/
Franklin NC-
401 PM EDT THU MAY 25 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN FRANKLIN COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

LAT...LON 3602 7777 3601 7777 3599 7778 3596 7779
      3593 7809 3603 7811 3612 7783 3612 7780
TIME...MOT...LOC 2000Z 255DEG 34KT 3599 7801 

$$

NCC127-252015-
/O.CON.KRAH.SV.W.0074.000000T0000Z-170525T2015Z/
Nash NC-
401 PM EDT THU MAY 25 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR CENTRAL NASH COUNTY...

At 400 PM EDT, a severe thunderstorm was located near Nashville,
moving east at 40 mph.

HAZARD...Half dollar size hail. 

SOURCE...Public. 

IMPACT...Damage to vehicles is expected. 

Locations impacted include...
Rocky Mount, Nashville, Dortches and Red Oak. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a dangerous storm. Prepare immediately for large destructive
hail capable of producing significant damage. People outside should
move to a shelter, inside a strong building and away from windows.

&&

LAT...LON 3602 7777 3601 7777 3599 7778 3596 7779
      3593 7809 3603 7811 3612 7783 3612 7780
TIME...MOT...LOC 2000Z 255DEG 34KT 3599 7801 

HAIL...1.25IN
WIND...<50MPH
 
$$

BLAES

Area Forecast Discussion
National Weather Service Raleigh NC
110 PM EDT Thu May 25 2017

.SYNOPSIS...
An upper level trough will cross central NC this afternoon. Weak
high pressure will follow and extend across the southeastern U.S.
through Friday night. A warm front will develop east across the
Appalachians and become quasi-stationary across NC and VA through
the weekend.

&&

.NEAR TERM /THROUGH FRIDAY/...
As of 110 PM Thursday...

A mid-upper low over western Appalachians is pivoting east southeast
this afternoon.  Cold air aloft associated with the upper low
combined with solar heating is supporting convection in central
North Carolina with small hail. Isolated stronger cells have the
potential to produce up to 1 inch diamater hail.

There will be a related conditional threat of severe hail,
particularly east of U.S. Hwy 1, where both instability and SSWly
mid level flow/bulk shear will be relatively maximized in a brief
window from 17Z-21Z. Strong to damaging straight line winds, driven
by both the background mid level flow and sub-cloud
evaporational/diabatic cooling, may also result.

After about 21Z, the passage of the trough axis will cause the mid
level flow to weaken and veer and consequently mitigate an earlier
severe threat, while small hail will remain possible through early
evening.

Lastly, mixed character precipitation (Ie. a stratiform shield of
light rain with some convective elements) will likely pivot across
the nrn piedmont as the parent mid level moist axis swings around
the base and wrn side of the upper trough; and this may result in a
few sprinkles there this evening, until the moist axis lifts away
after 03Z.

Lows tonight in the 50s, with a light but steady Swly breeze in the
MSL pressure gradient between sub-1000 mb low pressure that will be
lifting away from the Middle Atlantic coast, and incoming 1015 mb
high pressure from the nrn GOM and Gulf coast.  Ridging and drier
airmass on Friday will support clear to scattered clouds with max
temperatures 80 to 85.

&&

.SHORT TERM /Friday through Friday night/...
As of 115 AM Thursday...

The mid level low over the Northeast early Fri will continue moving
to the NE along the coast of the Canadian Maritimes through Fri
night, with its trailing trough axis lifting NE away from NC Friday
morning. Rising heights aloft and a drying/stabilizing air mass --
as agreed upon by the latest model runs -- supports plenty of
sunshine with no pops. Low level thicknesses start the day well
below normal but do start to recover in the afternoon, indicating
highs just a tad under normal, 79-84. Fast mid level winds from the
WNW Fri night will likely draw some high level moisture across the
region, and we could see a little orographic enhancement of these
high clouds, based on the forecast thermal and moisture profiles.
Expect lows of 60-64. -GIH

&&

.LONG TERM /Saturday through Wednesday/...
As of 410 AM Thursday...

Sat/Sat night: A very broad and flat anticyclonic flow will stretch
from NW Mexico across the southern Plains and mid Miss Valley to the
Mid Atlantic region, north of a weak ridge centered over the NW
Gulf, to begin the holiday weekend. At the surface, a weak and
elongated Bermuda high will extend across the Southeast states, with
a weak frontal zone to our north across VA/KY. Models show at least
one subtle wave (which may be an old MCV) tracking within this
fairly fast mid level flow across the Mid Atlantic Sat
evening/night, prompting convection chances across northern and
eastern NC late Sat but particularly Sat evening and into the night,
accompanying a weak surface low tracking along the surface front
boundary. With good model agreement on this general picture, will
ramp up pops across the north late Sat afternoon, showing a max in
the NE CWA Sat evening before decreasing slowly post-wave overnight.
Thicknesses will have rebounded back above normal, so expect highs
from the mid 80s far NW and near the VA border to the lower 90s SE.
Lows Sat night 65-70.

Sun-Mon: Starting Sun, a mid level low over W Ontario will deepen
and drop SE across the N Great Lakes, as broad troughing begins to
dig over the central and eastern CONUS. This trend from gently
anticyclonic or zonal to cyclonic flow with the trough axis to our
west indicates a moist return flow and increasing chances for mainly
afternoon/evening convection, triggered in part by weak
perturbations tracking from the W Gulf Coast northeastward across
the Carolinas. At the surface, we're likely to see a cold front
holding well to our NW, but with a weak prefrontal surface trough
extending through the Piedmont. This will likely serve as a focus
for the expected storms, with models suggesting the best coverage
during the afternoon and evening of Memorial Day (unfortunately for
many). Will go with a good chance of showers/storms each afternoon
and evening. The aforementioned cold front is expected to drop SE
into NC by late Mon, but appears likely to wash out before having
any major impact on temps, as the mid level trough axis will still
be to our west. Highs both days in the 80s to around 90 (with Sun
perhaps a degree or two hotter than Mon) with muggy lows in the 60s
to near 70.

Tue-Wed: As the mid level trough over central and eastern NOAM
broadens and shifts eastward, we should see a reinforcing front
dropping through the area, helping to bring in drier and slightly
cooler temps by mid week. Expect low shower/storm chances to be
confined to SE sections Tue, with dry weather everywhere Wed as weak
high pressure starts to build in from the W. Highs from around 80 to
the mid 80s, and lows around 60 to the mid 60s. -GIH

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
As of 110 PM Thursday...

Convection continues to intensify at 17Z from Albemarle to Chapel
Hill to Roxboro.  Isolated hail up to 1 inch diameter with stronger
cells. Convective cells moving east northeast at 25 knots and will
pass through RDU vicinity 1745-1830Z. Afternoon solar heating will
support additional convection mainly northern half of area as an
upper level trough and associated very cold temperatures aloft pivot
northeastward across the forecast area.

Outlook: At least a couple of clusters of showers and storms, some
strong to severe, and with gusty outflow winds surging well away
from them, will return to portions of central and/or northern NC for
Sat afternoon through Sunday. The approach and stall of a couple of
cold fronts east of the Appalachians may result in a band of MVFR
ceilings over central NC Mon night, and also a small chance of
diurnal convection both Mon and Tue.

&&

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

&&

SYNOPSIS...MWS
NEAR TERM...MWS/Franklin
SHORT TERM...Hartfield
LONG TERM...Hartfield
AVIATION...MWS/Franklin

Hazardous Weather Outlook
National Weather Service Raleigh NC
534 AM EDT Thu May 25 2017

NCZ008>011-026>028-041>043-077-078-088-089-260945-
Granville-Vance-Warren-Halifax-Franklin-Nash-Edgecombe-Wake-Johnston-
Wilson-Harnett-Wayne-Cumberland-Sampson-
534 AM EDT Thu May 25 2017

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and Tonight.

While small hail will accompany any scattered thunderstorm this
afternoon, the most intense storms will be capable of producing hail up
to the size of golf balls and perhaps a few strong to damaging wind
gusts.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed mainly for hail reports between noon
and 7 pm.

NCZ007-023>025-040-075-076-085-086-260945-
Person-Alamance-Orange-Durham-Chatham-Moore-Lee-Scotland-Hoke-
534 AM EDT Thu May 25 2017

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and Tonight.

While small hail will accompany any scattered thunderstorm this afternoon,
the most intense storms will be capable of producing hail up to one
and one quarter inches in diameter and perhaps a few strong to
damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed mainly for hail reports between noon
and 6 pm.

NCZ021-022-038-039-073-074-083-084-260945-
Forsyth-Guilford-Davidson-Randolph-Stanly-Montgomery-Anson-Richmond-
534 AM EDT Thu May 25 2017

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...Today and Tonight.

While small hail will accompany any scattered thunderstorm this afternoon,
the most intense storms will be capable of producing hail up to the
size of pennies and perhaps a few strong to damaging wind gusts.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

Hazardous weather is not expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed mainly for hail reports between noon
and 6 pm.

26

Special Weather Statement
National Weather Service Raleigh NC
153 PM EDT THU MAY 25 2017

NCZ008-009-025-041-251900-
Vance NC-Durham NC-Wake NC-Granville NC-
153 PM EDT THU MAY 25 2017

...Scattered strong thunderstorms with hail will affect portions of
Vance...Durham... north central Wake and Granville Counties Until
300 PM EDT...

At 151 PM EDT, Doppler radar was tracking A strong thunderstorm over
Durham, moving east at 25 mph. Other strong storms were located
north of Oxford and near Kerr Lake.

Pea size hail will be possible with this storm.

Locations impacted include...
Raleigh, Durham, Henderson, Oxford, Creedmoor, Butner, Kittrell,
Stem, Stovall and Middleburg.

LAT...LON 3626 7831 3623 7834 3623 7838 3616 7842
      3618 7849 3608 7854 3602 7854 3594 7862
      3587 7900 3614 7896 3624 7878 3654 7877
      3654 7832
TIME...MOT...LOC 1751Z 259DEG 24KT 3595 7894

BLAES

Special Weather Statement
National Weather Service Raleigh NC
226 PM EDT THU MAY 25 2017

NCZ010-011-026-027-041>043-077-088-089-251930-
Johnston NC-Nash NC-Franklin NC-Sampson NC-Harnett NC-Wake NC-
Warren NC-Halifax NC-Cumberland NC-Wilson NC-
226 PM EDT THU MAY 25 2017

...An area of showers and strong thunderstorms will affect portions
of Johnston...Nash...Franklin...northwestern Sampson...eastern
Harnett...central Wake...eastern Warren...Halifax...northeastern
Cumberland and northwestern Wilson Counties Until 330 PM EDT...

At 223 PM EDT, Doppler radar was tracking an area of showers and
strong thunderstorms stretching from near Louisburg and Rocky Mount
southeast across Smithfield to near Fayetteville. These showers and
storms were moving northeast at 25 mph.

Pea size hail and wind gusts up to 40 mph are expected with
stronger storms.

Locations impacted include...
Raleigh, Rocky Mount, Roanoke Rapids, Smithfield, Nashville,
Louisburg, Lillington, Halifax, Garner and Fuquay-Varina.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Seek shelter in a nearby building or vehicle. Wind gusts as high as
40 mph are capable of knocking down tree limbs and blowing around
trash cans, potted plants, lawn furniture and other light outdoor
objects.

&&

LAT...LON 3651 7790 3650 7782 3648 7777 3649 7771
      3648 7764 3644 7762 3641 7755 3637 7755
      3634 7759 3630 7755 3631 7751 3614 7767
      3615 7768 3615 7770 3608 7772 3511 7864
      3534 7900 3655 7796 3654 7790
TIME...MOT...LOC 1823Z 280DEG 21KT 3571 7827

13

Special Weather Statement
National Weather Service Raleigh NC
244 PM EDT THU MAY 25 2017

NCZ039>041-075>077-251930-
Lee NC-Chatham NC-Harnett NC-Randolph NC-Wake NC-Moore NC-
244 PM EDT THU MAY 25 2017

...Strong thunderstorms will move through Lee...Chatham... western
Harnett...southern Wake and Moore Counties through 330 PM EDT...

At 242 PM EDT, Doppler radar was tracking strong thunderstorms
near Sanford and Southern Pines, moving east at 35 mph.

Pea size hail and wind gusts up to 40 mph will be possible with
these storms.

Locations impacted include...
Sanford, Southern Pines, Pittsboro, Carthage, Siler City,
Fuquay-Varina, Pinehurst, Goldston, Apex and Holly Springs.

LAT...LON 3519 7920 3521 7924 3520 7928 3521 7966
      3524 7967 3525 7969 3578 7962 3568 7871
      3519 7913
TIME...MOT...LOC 1842Z 268DEG 33KT 3546 7918

13

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
250 PM EDT THU MAY 25 2017

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

0220 PM     HAIL             3 NW PURNELL            36.05N  78.62W
05/25/2017  E0.25 INCH       GRANVILLE          NC   SOCIAL MEDIA

            REPORT OF PEA TO DIME SIZE HAIL NEAR WAKE AND GRANVILLE
            COUNTY LINE.

&&

EVENT NUMBER RAH1700547

TDH

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
307 PM EDT THU MAY 25 2017

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

0306 PM     HAIL             LOUISBURG               36.10N  78.30W
05/25/2017  M0.25 INCH       FRANKLIN           NC   TRAINED SPOTTER

            SPOTTER REPORTED PEA SIZE HAIL IN LOUISBURG.

&&

EVENT NUMBER RAH1700548

TDH

Special Weather Statement
National Weather Service Raleigh NC
314 PM EDT THU MAY 25 2017

NCZ011-027-028-042-043-078-252015-
Edgecombe NC-Johnston NC-Nash NC-Halifax NC-Wayne NC-Wilson NC-
314 PM EDT THU MAY 25 2017

...Showers and strong thunderstorms stretching from near Roanoke
Rapids southwest along the I95 corridor will affect portions of
Edgecombe...east central Johnston...Nash...Halifax...northern Wayne
and Wilson Counties until 415 PM EDT...

At 311 PM EDT, Doppler radar was tracking showers and strong
thunderstorms from Roanoke Rapids southwest to near Goldsboro,
moving east at 40 mph.

Pea size hail and wind gusts up to 40 mph have been reported from
stronger storms. Be prepared to move indoors as these storms pass.

Locations impacted include...
Rocky Mount, Tarboro, Wilson, Scotland Neck, Elm City, Fremont,
Micro, Enfield, Princeville and Sharpsburg.

LAT...LON 3609 7731 3600 7741 3590 7734 3582 7735
      3583 7739 3581 7742 3580 7747 3557 7782
      3543 7783 3540 7781 3548 7829 3630 7755
      3632 7744 3626 7741 3624 7738 3621 7738
      3616 7727 3612 7724 3612 7725 3611 7723
TIME...MOT...LOC 1911Z 273DEG 34KT 3572 7784

13