Flash Flood Warning 5, NWS Raleigh, NC

140 
WGUS72 KRAH 220044
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
844 PM EDT MON MAY 21 2018

NCC183-220245-
/O.CON.KRAH.FF.W.0005.000000T0000Z-180522T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wake NC-
844 PM EDT MON MAY 21 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
CENTRAL WAKE COUNTY...

At 836 PM EDT, local law enforcement reported flash flooding in 
northwest Raleigh, including the Crabtree creek area near Glenwood 
Avenue and Six Fork Road. Up to three inches of rain have already 
fallen. Flash flooding is already occurring.

Some locations that will experience flooding include...
Raleigh, Cary, Rdu International, Morrisville, Falls Lake State Rec 
Area, William B Umstead State Park and Research Triangle.

Additional rainfall amounts of one to two inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...


Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots. Do not drive 
your vehicle into areas where water covers the road. When 
encountering flooded roads, turn around, don't drown.

Please report flooding to your local law enforcement agency when you
can do so safely.

&&

LAT...LON 3597 7842 3596 7841 3571 7863 3578 7893
      3587 7891 3587 7883 3593 7880 3592 7876
      3594 7873 3601 7870 3603 7872 3603 7874
      3607 7868

$$

77

634 
WGUS72 KRAH 220118
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
918 PM EDT MON MAY 21 2018

NCC183-220245-
/O.CON.KRAH.FF.W.0005.000000T0000Z-180522T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wake NC-
918 PM EDT MON MAY 21 2018

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1045 PM EDT FOR
NORTHWESTERN WAKE COUNTY...

At 914 PM EDT, local law enforcement reported flash flooding in 
northwest Raleigh, including the Crabtree Creek area near Glenwood 
Avenue and Six Fork Road. Up to four inches of rain have already 
fallen. Flash flooding is already occurring and will continue for 
the next several hours despite the decrease in rainfall coverage and 
intensity.

Some locations that will experience flooding include...
Raleigh, Research Triangle, William B Umstead State Park and 
locations along Crabtree Creek from around Crabtree Valley Mall to 
near Six Forks Road.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots. Do not drive 
your vehicle into areas where water covers the road. When 
encountering flooded roads, turn around, don't drown.

Please report flooding to your local law enforcement agency when you 
can do so safely.

&&

LAT...LON 3589 7859 3581 7858 3580 7863 3578 7871
      3583 7882 3587 7891 3587 7883 3593 7880
      3592 7876 3594 7873 3598 7871 3602 7858
      3600 7855

$$

77

514 
WGUS52 KRAH 220237
FFWRAH
NCC183-220645-
/O.EXT.KRAH.FF.W.0005.000000T0000Z-180522T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Raleigh NC
1037 PM EDT MON MAY 21 2018

The National Weather Service in Raleigh has extended the

* Flash Flood Warning for...
  Northwestern Wake County in central North Carolina...

* Until 245 AM EDT

* At 1035 PM EDT, local law enforcement reported flash flooding in 
  north Raleigh, including the Crabtree Creek area near Glenwood 
  Avenue to Old Wake Forest Road. While the heavy rain has ended 
  across the warned area, flash flooding will continue into early 
  Tuesday morning. 

* Some locations that will experience flooding include...
  northwest Raleigh, William B Umstead State Park and locations 
  along Crabtree Creek from around Crabtree Valley Mall to near Six 
  Forks Road.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles. Be especially cautious at night when it is 
harder to recognize the dangers of flooding.

&&

LAT...LON 3589 7859 3581 7858 3580 7863 3578 7871
      3583 7882 3587 7891 3587 7883 3593 7880
      3592 7876 3594 7873 3598 7871 3602 7858
      3600 7855

$$

77

076 
WGUS72 KRAH 220638
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
238 AM EDT TUE MAY 22 2018

NCC183-220647-
/O.EXP.KRAH.FF.W.0005.000000T0000Z-180522T0645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Wake NC-
238 AM EDT TUE MAY 22 2018

...THE FLASH FLOOD WARNING FOR NORTHWESTERN WAKE COUNTY WILL EXPIRE
AT 245 AM EDT...

Local officials have reported that the flood waters from earlier 
tonight have receded, and flooding is no longer expected to pose a 
threat. Please continue to heed any remaining road closures, and 
watch for residual ponding of water on roads.

LAT...LON 3589 7859 3581 7858 3580 7863 3578 7871
      3583 7882 3587 7891 3587 7883 3593 7880
      3592 7876 3594 7873 3598 7871 3602 7858
      3600 7855

$$

GIH

Area Forecast Discussion
National Weather Service Raleigh NC
315 PM EDT Mon May 21 2018

.SYNOPSIS...
A moist and slightly unstable air mass will remain entrenched across
central NC through the middle of the week. A cold front will move
through the area on Wednesday.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 315 PM Monday...

Latest sfc analysis shows a weak backdoor front stretching across
the northern portion of the state, just south of the VA border.
Radar shows scattered showers and tstms developing invof of this
boundary.  The latest HRRR shows this area of shower/tstm activity
expanding as the afternoon progresses. While not every area will see
rain, the best chance for rain will be north of the line from
Albemarle to Clinton, this afternoon through the evening.

The latest mesoanalysis shows that the best instability is located
north and east of Raleigh.  While there is also an area of elevated
DCAPE north and east of Raleigh, deep layer shear is rather modest.
This suggests that the main concern will be wet downbursts for any
cells with elevated cores.  Also modest mid-level winds in this
mornings soundings suggest that slow-moving storms could produce
locally higher rainfall amounts.

Look for the storms and subsequent rain this evening to gradually
diminish as the night goes on.  Despite mostly cloudy conditions
tonight, given the light winds and high dwpts, there could be a few
patches of fog late tonight, esp areas that see the rain this
evening.  Low in the upper 60s to near 70.

&&

.SHORT TERM /Tuesday through Tuesday night/...
As of 315 PM Monday...

The boundary that's currently over our area is expected to lift back
to the north by 12Z Tuesday.  However, there is some indication in
models that a weak mid-level short wave moving up from the south
could prolong the risk for showers across our north/northeast zones
between daybreak and noon Tuesday. However, once this feature
passes, a pocket of dryer air in its wake should give us a brief
break in rain chances during the afternoon, esp across across the
eastern half of our CWA.

By Tuesday evening and night, we'll turn our attention to a cold
front approaching from the northwest (the system currently across
the northern/central Plains).  Models suggest that pre-frontal
shower and thunderstorm activity will begin approaching our western
zones as early as Tuesday evening, with best chances for rain across
our western and central zones overnight into Wednesday morning.

With little change in the airmass, expect highs Tuesday again in the
low-mid 80s and lows Tuesday night in the upper 60s.

&&

.LONG TERM /WEDNESDAY THROUGH MONDAY/...
As of 235 PM Monday...

The subtropical ridge off the Southeast coast will keep central
North Carolina in a tropical airmass on Wednesday.  A frontal zone
dropping southward from the Mid Atlantic will enter northern parts
of the region Wednesday night and become stationary close to the
NC/SC border on Thursday.  The tropical airmass will be suppressed to
the south of the boundary Thursday and Friday before returning
northward into central North Carolina over the holiday weekend. In
addition, a tropical low is forecast to move northward across Cuba
and the Gulf of Mexico/Florida over the holiday weekend and early
next week.

Diurnal heating combined with the frontal boundary will generate
scattered convection Wednesday afternoon and evening. Scattered
convection Thursday and Friday should be limited to locations near
the NC/SC border and western Piedmont. Convection will overspread
the entire region over the 3-day holiday weekend with the return of
a tropical airmass and close proximity of the tropical low.

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
As of 315 PM Monday...

Latest satellite and obs shows VFR conditions with cigs mostly abv
15k AGL.  The exception is in and near scattered shower/tstm
activity, where flight conditions will briefly lower to low-MVFR or
IFR cigs.  These conditions will continue through the afternoon,
although rain and low-MVFR cigs may become a bit more widespread
along and north of a line from KINT-KGSB after 22/01Z.  After 22/05z
through about 22/11z , forecast soundings suggest patchy IFR
conditions may develop across the eastern Piedmont and Coastal
Plain, including KRWI, KRDU, and KFAY, in low cigs and some fog.
After 22/11Z, look for improving conditions as any low cigs begin to
lift with heating.

Looking beyond 18z Tue...and unsettled and moist week will provide
occasional opportunities for showers and tstms, and early morning
low cigs, through the rest of the forecast period.

&&

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

&&

SYNOPSIS...np
NEAR TERM...np
SHORT TERM...np
LONG TERM...Franklin
AVIATION...np

Hazardous Weather Outlook
National Weather Service Raleigh NC
356 PM EDT Mon May 21 2018

NCZ083>086-088-222000-
Anson-Richmond-Scotland-Hoke-Cumberland-
356 PM EDT Mon May 21 2018

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...This Afternoon and Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

NCZ007>011-021>028-038>043-073>078-089-222000-
Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance-
Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake-
Johnston-Wilson-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Sampson-
356 PM EDT Mon May 21 2018

This Hazardous Weather Outlook is for central North Carolina.

.DAY ONE...This Afternoon and Tonight.

Scattered showers and thunderstorms with heavy downpours are
possible this afternoon and evening. If the showers and storms train
across the same location, 1 to 2 inches of rain could occur in less
than a couple of hours, leading to localized flooding of streets and
swollen creeks. Small hail and brief strong wind gusts are also
possible with the stronger storms.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Isolated severe storms are possible on Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed.

Special Weather Statement
National Weather Service Raleigh NC
644 PM EDT MON MAY 21 2018

NCZ007-008-212345-
Person NC-Granville NC-
644 PM EDT MON MAY 21 2018

...AN AREA OF SHOWERS AND STRONG THUNDERSTORMS WILL AFFECT
NORTHEASTERN PERSON AND NORTHERN GRANVILLE COUNTIES UNTIL 745 PM
EDT...

At 644 PM EDT, Doppler radar was tracking an area of showers and
strong thunderstorms near Oxford, moving northwest at 10 mph.

Wind gusts up to 40 mph, heavy rainfall, and frequent lightning will
be possible with these storm.

Locations impacted include...
Oxford, Stovall, Bethel Hill, Mayo Reservoir, Berea and John H Kerr
Reservoir.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Locally heavy rain will quickly reduce visibility and result in
ponding of water on roadways, standing water in low lying areas, and
minor flooding of creeks, streams, and areas of poor drainage.
Drivers are urged to slow down and use extra caution to avoid
hydroplaning, especially in urban areas where prolonged heavy rain
can quickly lead to flooding.

&&

LAT...LON 3646 7851 3635 7851 3629 7878 3630 7887
      3654 7889 3654 7850
TIME...MOT...LOC 2244Z 122DEG 7KT 3639 7861

MORROW

Special Weather Statement
National Weather Service Raleigh NC
655 PM EDT MON MAY 21 2018

NCZ038-212345-
Davidson NC-
655 PM EDT MON MAY 21 2018

...A STRONG THUNDERSTORM WILL AFFECT NORTHERN DAVIDSON COUNTY UNTIL
745 PM EDT...

At 654 PM EDT, Doppler radar was tracking a strong thunderstorm near
Linwood, or 8 miles west of Lexington, moving northeast at 15 mph.

Pea size hail and wind gusts up to 40 mph will be possible with this
storm.

Locations impacted include...
Lexington, Welcome and Arcadia.

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.

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3584 8045 3583 8043 3585 8042 3584 8040
      3585 8039 3587 8039 3588 8042 3589 8041
      3589 8037 3595 8038 3599 8035 3587 8012
      3572 8039 3573 8039 3572 8042 3574 8046
      3577 8045 3579 8047
TIME...MOT...LOC 2254Z 223DEG 13KT 3578 8041

MORROW

Special Weather Statement
National Weather Service Raleigh NC
658 PM EDT MON MAY 21 2018

NCZ040-212345-
Chatham NC-
658 PM EDT MON MAY 21 2018

...A DEVELOPING THUNDERSTORM WILL AFFECT WEST CENTRAL CHATHAM COUNTY
UNTIL 745 PM EDT...

At 657 PM EDT, Doppler radar was tracking a developing strong
thunderstorm 7 miles south of Siler City, moving northeast at 10 mph.

Wind gusts up to 40 mph will be possible with this storm.

Locations impacted include...
Siler City and Hasty.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3563 7955 3569 7955 3576 7952 3570 7934
      3557 7946 3560 7954
TIME...MOT...LOC 2257Z 213DEG 8KT 3562 7946

MORROW

Special Weather Statement
National Weather Service Raleigh NC
700 PM EDT MON MAY 21 2018

NCZ008-025-041-220000-
Durham NC-Wake NC-Granville NC-
700 PM EDT MON MAY 21 2018

...AN AREA OF SHOWERS AND STRONG THUNDERSTORMS WILL AFFECT SOUTHERN
GRANVILLE...NORTH CENTRAL WAKE AND NORTHEASTERN DURHAM COUNTIES UNTIL
800 PM EDT...

At 700 PM EDT, Doppler radar was tracking an area of showers and
strong thunderstorms along a line extending from near Oxford to near
Creedmoor to Wake Forest. Movement was northwest at 10 mph.

Half inch hail and wind gusts up to 50 mph will be possible with
these storms.

Locations impacted include...
Oxford, Creedmoor, Wake Forest, Butner, Stem, Falls Lake, Lake
Butner, Falls Lake State Rec Area, Falls Lake Boat Ramp and Purnell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is also occurring with these storms, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

&&

LAT...LON 3636 7852 3609 7855 3608 7854 3602 7855
      3600 7849 3597 7847 3594 7868 3614 7885
      3624 7881 3624 7880 3626 7880 3629 7879
TIME...MOT...LOC 2300Z 144DEG 8KT 3629 7856 3615 7861 3598 7851

MORROW

Special Weather Statement
National Weather Service Raleigh NC
706 PM EDT MON MAY 21 2018

NCZ083-212345-
Anson NC-
706 PM EDT MON MAY 21 2018

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL ANSON COUNTY UNTIL 745
PM EDT...

At 705 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles west of Wadesboro, moving northeast at 10 mph.

Pea size hail and wind gusts up to 40 mph will be possible with this
storm.

Locations impacted include...
Wadesboro, Ansonville, Polkton, Peachland and Blewett Falls Lake.

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.

Very heavy rain can be expected due to the slow movement of this
storm. Prolonged heavy rain will result in ponding of water on
roadways, standing water in low lying areas, and minor flooding of
creeks and streams. Drivers are urged to slow down and use extra
caution to avoid hydroplaning.

&&

LAT...LON 3504 8029 3517 8020 3516 8019 3515 8016
      3516 8017 3517 8016 3517 8014 3518 8013
      3519 8013 3519 8011 3517 8011 3514 8008
      3511 8007 3508 8000 3512 7995 3512 7992
      3507 7991 3490 8019 3501 8030
TIME...MOT...LOC 2305Z 218DEG 9KT 3499 8019

MORROW

Special Weather Statement
National Weather Service Raleigh NC
715 PM EDT MON MAY 21 2018

NCZ025-041-220000-
Durham NC-Wake NC-
715 PM EDT MON MAY 21 2018

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL WAKE AND SOUTHEASTERN
DURHAM COUNTIES UNTIL 800 PM EDT...

At 715 PM EDT, Doppler radar was tracking a strong thunderstorm over
Raleigh, moving northeast at 5 mph.

Half inch hail, heavy rain, and wind gusts up to 40 mph will be
possible with this storm.

Locations impacted include...
Raleigh, Cary, Wake Forest, Rdu International, Morrisville, William B
Umstead State Park and Falls Lake.

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.

Very heavy rain can be expected due to the slow movement of this
storm. Prolonged heavy rain will result in ponding of water on
roadways, standing water in low lying areas, and minor flooding of
creeks and streams. Drivers are urged to slow down and use extra
caution to avoid hydroplaning.

&&

LAT...LON 3575 7863 3584 7883 3602 7874 3595 7867
      3597 7847
TIME...MOT...LOC 2315Z 208DEG 6KT 3585 7870

MORROW