Alert archive / South Carolina / Flash Flood Watches in 2018

Flash Flood Watch 3, NWS Charleston, SC

September 13, 2018Berkeley County, Dorchester County, South Carolina

NWS Charleston, SC issued this flash flood watch at Sep 13, 2018, 5:27 PM EDT for Berkeley County, Dorchester County, South Carolina. It took effect at Sep 14, 2018, 8:00 AM EDT. It was in force for 27 hr.

The area

The counties it named.

The facts

Issued
Sep 13, 2018, 5:27 PM EDT (21:27 UTC)
In effect from
Sep 14, 2018, 8:00 AM EDT
Expired
Sep 15, 2018, 10:45 AM EDT
In force
27 hr
Issued by
NWS Charleston, SC
Flood severity
None

Counties Berkeley County, SC, Dorchester County, SC

The radar

The Charleston,SC radar (KCLX), 97 km from the middle of the area, began a volume at 21:28 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.

The nearest sounding before it

Charleston AFB, SC (KCHS), launched 12:00Z, 9.5 hours before the alert went out and 31 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, Charleston AFB, SC at 12:00Z on 2018-09-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 379 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, Charleston AFB, SC at 12:00Z on 2018-09-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -25 square meters per square second.1939Sfc1 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
379 J/kg
Mixed-layer CIN
-111 J/kg
Mixed-layer LCL
801 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-25 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

832 
WGUS62 KCHS 132127
FFACHS

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Charleston SC
527 PM EDT Thu Sep 13 2018

SCZ044-045-050-052-140600-
/O.NEW.KCHS.FF.A.0003.180914T1200Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
527 PM EDT Thu Sep 13 2018

...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SUNDAY
AFTERNOON...

The National Weather Service in Charleston has issued a

* Flash Flood Watch for a portion of southeast South Carolina, 
  including the following areas, Charleston, Dorchester, Inland 
  Berkeley, and Tidal Berkeley. 

* from Friday morning through Sunday afternoon

* Hurricane Florence is expected to make landfall along the
  southeastern North Carolina coast on Friday morning. Friday 
  through Saturday, Florence is forecast to slowly track generally
  west across the Pee Dee and Midland areas of South Carolina. 
  Bands of torrential rainfall will rotate across the broad 
  circulation associated with Florence. At this time, the bands 
  will gradually become more frequent across the Charleston Tri- 
  County area on Friday, with rainfall rates peaking Friday night 
  into Saturday. Rain should begin to decrease from east to west 
  late Sunday.

*  Storm total rainfall amounts are forecast to range from 3 to 7
   inches across Berkeley, Charleston, and Dorchester Counties, 
   with up to 7 to 9 inches near the Santee River. Local higher 
   rainfall amounts are expected. The combination of torrential 
   rainfall rates and potential overlap with high tide periods 
   could result in flash flooding across coastal urban areas, 
   including downtown Charleston. In addition, flash flooding 
   along creeks, streams, and tidal swamps will become likely and 
   may threaten nearby property, especially Friday night into 
   Saturday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$

NED
7 follow-up statements
891 
WGUS62 KCHS 140625
FFACHS

Flood Watch
National Weather Service Charleston SC
225 AM EDT Fri Sep 14 2018

SCZ044-045-050-052-141430-
/O.CON.KCHS.FF.A.0003.180914T1200Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
225 AM EDT Fri Sep 14 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH SUNDAY AFTERNOON...

The Flash Flood Watch continues for

* a portion of southeast South Carolina, including the following 
  areas, Charleston, Dorchester, Inland Berkeley, and Tidal 
  Berkeley. 

* from 8 AM EDT this morning through Sunday afternoon

* Hurricane Florence is expected to make landfall along the
  southeastern North Carolina coast this morning. Friday through
  Saturday, Florence is forecast to slowly track generally west
  across the Pee Dee and Midland areas of South Carolina. Bands of
  torrential rainfall will rotate across the broad circulation
  associated with Florence. At this time, the bands will gradually
  become more frequent across the Charleston Tri-County area on 
  Friday, with rainfall rates peaking Friday night into Saturday. 
  Rain should begin to decrease from east to west late Sunday. 

* Storm total rainfall amounts are forecast to range from 3 to 7 
  inches across Berkeley, Charleston, and Dorchester Counties, 
  with up to 7 to 9 inches near the Santee River. Local higher 
  rainfall amounts are expected. The combination of torrential 
  rainfall rates and potential overlap with high tide periods 
  could result in flash flooding across coastal urban areas, 
  including downtown Charleston. In addition, flash flooding 
  along creeks, streams, and tidal swamps will become likely and 
  may threaten nearby property, especially Friday night into 
  Saturday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$
779 
WGUS62 KCHS 140905
FFACHS

Flood Watch
National Weather Service Charleston SC
505 AM EDT Fri Sep 14 2018

SCZ044-045-050-052-141715-
/O.CON.KCHS.FF.A.0003.180914T1200Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
505 AM EDT Fri Sep 14 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 8 AM EDT THIS MORNING
THROUGH SUNDAY AFTERNOON...

The Flash Flood Watch continues for

* a portion of southeast South Carolina, including the following 
  areas, Charleston, Dorchester, Inland Berkeley, and Tidal 
  Berkeley. 

* from 8 AM EDT this morning through Sunday afternoon

* Hurricane Florence was making landfall along the southeastern
  North Carolina coast this morning. Through Saturday, Florence is
  forecast to slowly track generally west across the Pee Dee and
  Midland areas of South Carolina. Bands of torrential rainfall
  will rotate across the broad circulation associated with
  Florence. At this time, the bands will gradually become more
  frequent across the Charleston Tri-County area later today, with
  rainfall rates peaking tonight into Saturday. Rain should begin
  to decrease from east to west late Sunday. 

* Storm total rainfall amounts are forecast to range from 4 to 6
  inches across Berkeley, Charleston, and Dorchester Counties,
  with up to 8 inches near the Santee River and across northern
  Berkeley County. Local higher rainfall amounts are expected. The
  combination of torrential rainfall rates and potential overlap
  with high tide periods could result in flash flooding across
  coastal urban areas, including downtown Charleston. In addition,
  flash flooding along creeks, streams, and tidal swamps will
  become likely and may threaten nearby property, especially
  Friday night into Saturday. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$
877 
WGUS62 KCHS 141318
FFACHS

Flood Watch
National Weather Service Charleston SC
918 AM EDT Fri Sep 14 2018

SCZ044-045-050-052-142130-
/O.CON.KCHS.FF.A.0003.000000T0000Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
918 AM EDT Fri Sep 14 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON...

The Flash Flood Watch continues for

* Charleston, Dorchester, and Berkeley County. 

* through Sunday afternoon

* Hurricane Florence will very slowly move from the southeast
  North Carolina coast today to the South Carolina Midlands by
  Saturday night or Sunday. Bands of torrential rainfall
  associated with Florence's broad circulation will gradually
  become more frequent across the Charleston Tri-County area later
  today, with rainfall rates peaking tonight into Saturday. Rain
  should begin to decrease from east to west on Sunday. 

* Storm total rainfall amounts of 4 to 6 inches are possible
  across Berkeley, Charleston, and Dorchester Counties, with up to
  8 inches near the Santee River. The torrential rainfall could
  result in flash flooding along creeks, streams, and swamps, as
  well as poor-drainage urban locations. More significant flooding
  is possible in coastal areas if heavy rain occurs around high 
  tide.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$

JRL
003 
WGUS62 KCHS 142101
FFACHS

Flood Watch
National Weather Service Charleston SC
501 PM EDT Fri Sep 14 2018

SCZ044-045-050-052-150515-
/O.CON.KCHS.FF.A.0003.000000T0000Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
501 PM EDT Fri Sep 14 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON...

The Flash Flood Watch continues for

* Charleston, Dorchester, and Berkeley Counties. 

* through Sunday afternoon

* Hurricane Florence will very slowly move from southeast North
  Carolina to the South Carolina Midlands by Saturday night or 
  Sunday. Bands of torrential rainfall associated with Florence's 
  broad circulation will gradually overspread the area tonight, 
  continuing through Saturday evening before slowly tapering off 
  on Sunday. 

* Storm total rainfall amounts of 2 to 4 inches, with locally
  higher amounts, are possible across Berkeley, Charleston, and
  Dorchester Counties. The highest totals are expected over
  northern and eastern portions of Berkeley and Charleston
  Counties. The torrential rainfall could result in flash flooding
  along creeks, streams, and swamps, as well as poor-drainage 
  urban locations.
  

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$

JRL
918 
WGUS62 KCHS 150353
FFACHS

Flood Watch
National Weather Service Charleston SC
1153 PM EDT Fri Sep 14 2018

SCZ044-045-050-052-151200-
/O.CON.KCHS.FF.A.0003.000000T0000Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
1153 PM EDT Fri Sep 14 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON...

The Flash Flood Watch continues for

* Charleston, Dorchester, and Berkeley Counties.

* Through Sunday afternoon

* Tropical Storm Florence will move slowly inland tonight and to 
  the South Carolina Midlands by Saturday night or Sunday. Bands 
  of torrential rainfall associated with Florence's broad 
  circulation will gradually overspread the area tonight, 
  continuing through Saturday evening before slowly tapering off 
  on Sunday. 

* Storm total rainfall amounts of 2 to 4 inches, with locally
  higher amounts, are possible across Berkeley, Charleston, and
  Dorchester Counties. The highest rainfall totals are expected
  over northern portions of Berkeley and Charleston Counties. The
  torrential rainfall could result in flash flooding along creeks,
  streams, and swamps, as well as poor-drainage urban locations. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$
976 
WGUS62 KCHS 150937
FFACHS

Flood Watch
National Weather Service Charleston SC
537 AM EDT Sat Sep 15 2018

SCZ044-045-050-052-151745-
/O.CON.KCHS.FF.A.0003.000000T0000Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
537 AM EDT Sat Sep 15 2018

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH SUNDAY AFTERNOON...

The Flash Flood Watch continues for

* Charleston, Dorchester, and Berkeley Counties. 

* Through Sunday afternoon

* Tropical Storm Florence will move slowly inland today and
  tonight and to the South Carolina Midlands by Sunday. Bands of
  torrential rainfall associated with Florence's broad circulation
  will continue to gradually overspread the area, continuing
  through this evening before slowly tapering off on Sunday. 

* Storm total rainfall amounts of 2 to 4 inches, with locally 
  higher amounts, are possible across Berkeley, Charleston, and 
  Dorchester Counties. The highest rainfall totals are expected 
  over northern portions of Berkeley and Charleston Counties. 
  The torrential rainfall could result in flash flooding along 
  creeks, streams, and swamps, as well as poor-drainage urban 
  locations. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Be prepared to protect life and property, especially in areas
prone to flooding. If flooding develops, move to higher ground
immediately. If driving, be prepared for flooded roadways and
possible road closures.

&&

$$
022 
WGUS62 KCHS 151445
FFACHS

Flood Watch
National Weather Service Charleston SC
1045 AM EDT Sat Sep 15 2018

SCZ044-045-050-052-151545-
/O.CAN.KCHS.FF.A.0003.000000T0000Z-180916T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Dorchester-Inland Berkeley-Charleston-Tidal Berkeley-
Including the cities of Saint George, Summerville, Goose Creek, 
Moncks Corner, Charleston, North Charleston, Mount Pleasant, 
and Daniel Island
1045 AM EDT Sat Sep 15 2018

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of southeast South Carolina
has been cancelled. Periods of rain will continue through tonight,
then slowly taper off on Sunday. However, the intensity of the
rain is not expected to be great enough to cause widespread
flooding.

$$

What forecasters said that day

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

NWS Charleston, SC wrote its last area forecast discussion before this flash flood watch went out at Sep 13, 1:31 PM EDT, 3 hours 56 minutes earlier.

Area forecast discussion, Sep 13, 1:31 PM EDT, 3 hours 56 minutes before
Area Forecast Discussion
National Weather Service Charleston SC
131 PM EDT Thu Sep 13 2018

.SYNOPSIS...
Hurricane Florence is expected to impact the Carolinas this
weekend and potentially into early next week. A cold front
should approach the region during the second half of next week.

&&

.NEAR TERM /THROUGH TONIGHT/...
As of 130 PM: High clouds continue to thicken across the
forecast area, especially over SC. KCLX remains free of returns.
I will update the forecast to lower high temperatures this
afternoon. In addition, I will increase gusty wind mention in
the forecast.

As of 1050 AM: Cirrus clouds associated with Hurricane Florence
have streamed across forecast area this morning. Observed CHS
sounding indicated a subsidence inversion around 780 mb. In
addition, SPC mesoanalysis indicates that a wide area of stable,
250 J/kg CIN, has pushed across the forecast area. Given the
latest, I will update the forecast to remove mention of showers
and thunderstorms, except the far northern sections of Berkeley
and Charleston Counties.

Previous Discussion:
Today: Hurricane Florence will continue to
approach the southeast NC coast today while most of our region
experiences broad subsidence on the southwest periphery of the
storm. Cumulus and stratocu fields will likely be stunted by
broad sinking trajectories, we expect more in the way of upper
cirrus/cirrostratus to expand over the region during the day.
Despite the increase in high cloud canopy/exhaust, we tended to
raise temps a few degrees from the previous forecast as the low
level flow and subsidence dictates. Thicker high clouds and less
insolation could keep temps a bit cooler along the SC coast but
overall a warm day the region with dry weather. Surface winds
will increase across the SC central zones with 15-20 mph
expected during the afternoon hours during peak mixing hours.

Tonight: The only POPs we maintained were over the Charleston Tri-
County region, especially north of Charleston as PWATs increase
in that area. Winds will remain elevated across the area, strongest
over the Charleston area. No significant land-based weather is
expected with the hurricane nearing a landfall over Southeast NC.

&&

.SHORT TERM /FRIDAY THROUGH SATURDAY/...
Hurricane Florence is anticipated to track west-northwest toward the
North Carolina coast before potentially making land-fall on Friday,
then should gradually shift west-southwest inland and weaken
Saturday through Sunday. Given uncertainty in the path of Florence
once it approaches the southern portion of the North Carolina coast,
a Hurricane Watch will remain in effect for Charleston and Berkeley
Counties in Southeast South Carolina into early weekend.

On Friday, large-scale subsidence and offshore winds on the
outskirts of Florence passing to the north will likely limit overall
convection over much of Southeast Georgia, but conditions should
gradually deteriorate in regards to showers and a few thunderstorms
over the Tri-County area Friday afternoon as a swath of deep
tropical moisture characterized by PWATs around 2.5 inches nudges
into the area from the north as Florence shifts west-southwest later
in the day. Latest guidance and NHC track forecasts suggest the
possibility of Tropical Storm Force winds and/or wind gusts up to 40-
45 kts over parts of Charleston and Berkeley Counties as early as
late Friday morning, with conditions potentially persisting into
Saturday as the center of Florence makes its closest approach before
shifting further inland. By late morning Sunday, wind conditions
should vastly improve (weaken), but will become more onshore and
advect additional moisture over the region.

Given the anticipated path of Florence, precip coverage and
intensity appear greatest Saturday into Sunday while PWATs peak
between 2.5 to 3.0 inches. Latest guidance suggests a potential for
storm total qpf in the 5-9 inch range, with highest amounts over the
Tri-County area. Should Florence shift even closer to the area
before shifting further inland, heavy rainfall and the potential for
localized flash flooding will be possible, especially over parts of
the Tri-County area. However, overall flash flooding potential is
highly dependent on the eventual track of Florence after approaching
the North Carolina coast.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
Although uncertainty remains in the eventual track of Florence
and/or the remnants of the system early next week, a fair amount of
precip coverage is anticipated into at least Sunday night while
onshore winds and PWATs near 2.0 inches remain in place. Conditions
will then slowly improve (in regards to decreasing precip) on Monday
as the remnants of Florence lift north and eventually shift away
from the region. More typical diurnal convection is anticipated
Tuesday and Wednesday before a cold front attempts to approach the
region from the northwest on Thursday.

&&

.AVIATION /18Z THURSDAY THROUGH TUESDAY/...
KCHS will experience northwest winds gusting between 20-30 kts
through the 18Z TAF period. The terminals are forecast to remain
free of showers and thunderstorms through tonight. However,
during the final hours of the 18Z TAF at KCHS a few showers may
pass over the terminal, highlighted with at PROB30 between 15Z
to 18Z. KSAV should see steady NW winds.

Extended Aviation Outlook: Flight restrictions are increasingly
likely at KCHS Friday afternoon through at least Sunday, mainly due
to restricted visibility in heavy rainfall. Occasional MVFR cigs are
also possible. Gusty winds are also expected to impact KCHS Friday
through Sunday night. Sustained winds of 30-40 kt area possible
Friday into Saturday. Tempo flight restrictions will be possible at
the SAV this weekend, mainly due to showers and/or
thunderstorms.

&&

.MARINE...
See latest Marine Weather Message for updates.

Previous Discussion:
No changes to headlines over the waters
this morning with Hurricane Watches in the CHS Harbor and
Charleston Waters. Elsewhere, SCA flags remain in effect
elsewhere. Winds will build most noticeably over SC waters north
of Edisto Beach through tonight, closest to Hurricane Florence.
The low level gradient progs and blend from the NAM/GFS
indicate sustained winds may reach tropical storm force beyond
the Charleston Pilot buoy after midnight tonight. Seas are
expected to peak today as the brunt the spectral energy lashes
the NC coast by early Friday.

Friday through Tuesday: Hurricane Florence is expected to remain
beyond coastal waters while tracking west-northwest and eventually
approaching near or making landfall along the North Carolina coast
Friday. Given the anticipated track of Florence, Tropical Storm
Force winds could begin across northern South Carolina waters and
the Charleston Harbor late Friday morning, then persist into much of
Saturday as Florence shifts inland. Given some uncertainty in the
exact path of Florence, a Hurricane Watch remains in effect through
Friday for northern South Carolina waters and the Charleston Harbor.
Refer to the latest Coastal Waters Forecast for details on expected
marine conditions.

Outside of the Hurricane Watch, higher seas and swells associated
with Florence should support the continuation of a Small Craft
Advisory in offshore Georgia waters into Friday morning. However,
persistent offshore winds south of Florence will likely reduce seas
to below Small Craft Advisory levels for all waters south of the
Hurricane Watch by late Friday morning. Depending on the eventual
track of Florence, winds/seas could approach Small Craft Advisory
levels again Saturday and persist into Sunday as winds become more
onshore. However, winds/seas should improve over all waters Sunday
night into early Monday. Expect wind/seas conditions to then remain
below Small Craft Advisory levels for the remainder of Monday and
Tuesday as the remnants of Florence shift away from the region.

Rip Currents: Large breaking waves combined with building easterly
swell will support a high risk for rip currents for all beaches
today. Additional high risks for rip currents will likely be in
place into the weekend while Hurricane Florence passes offshore.

High Surf: High waves from Florence have been a bit slow to
build at 41004 overnight but we maintained the advisory in place
for now until web cam and surf report evidence at mid morning
show otherwise. The combination of building surf and high
astronomical tide cycles will produce beach erosion today.

&&

.TIDES/COASTAL FLOODING...
Blow out tides are possible ahead of Florence as strengthening
offshore winds help push water out during low tide cycles Friday
evening and early on Saturday morning, only to be replaced with
possible storm surge over the weekend as Florence draws closer.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...High Risk for Rip Currents until 8 PM EDT this evening for GAZ117-
     119-139-141.
     High Surf Advisory until 2 PM EDT this afternoon for GAZ117-
     119-139-141.
SC...High Risk for Rip Currents until 8 PM EDT this evening for
     SCZ048>051.
     High Surf Advisory until 2 PM EDT this afternoon for SCZ048-
     051.
     Hurricane Watch for SCZ045-050-052.
     Storm Surge Watch for SCZ049-050-052.
MARINE...Small Craft Advisory until 6 AM EDT Monday for AMZ352-354.
     Hurricane Watch for AMZ330-350.
     Tropical Storm Warning for AMZ350.
     Small Craft Advisory until 5 PM EDT Monday for AMZ374.

&&

NEAR TERM...NED
SHORT TERM...DPB
LONG TERM...DPB
AVIATION...NED
MARINE...DPB
TIDES/COASTAL FLOODING...
Hazardous weather outlook, Sep 13, 4:50 PM EDT, 37 minutes before
Hazardous Weather Outlook
National Weather Service Charleston SC
450 PM EDT Thu Sep 13 2018

GAZ117-119-139-141-SCZ048-051-142100-
Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh-
Beaufort-Coastal Jasper-
450 PM EDT Thu Sep 13 2018

...HIGH RISK FOR RIP CURRENTS IN EFFECT THROUGH FRIDAY EVENING...

This Hazardous Weather Outlook is for southeast Georgia and
southeast South Carolina.

.DAY ONE...Tonight.

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

   High Risk for Rip Currents.

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

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

   High Risk for Rip Currents.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ049-142100-
Coastal Colleton-
450 PM EDT Thu Sep 13 2018

...HIGH RISK FOR RIP CURRENTS IN EFFECT THROUGH FRIDAY EVENING...
...STORM SURGE WATCH IN EFFECT...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...Tonight.

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

   High Risk for Rip Currents.
   Storm Surge Watch.

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

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

   High Risk for Rip Currents.
   Storm Surge Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ050-142100-
Charleston-
450 PM EDT Thu Sep 13 2018

...HIGH RISK FOR RIP CURRENTS IN EFFECT THROUGH FRIDAY EVENING...
...TROPICAL STORM WARNING IN EFFECT...
...HURRICANE WATCH IN EFFECT...
...STORM SURGE WATCH IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SUNDAY
AFTERNOON...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...Tonight.

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

   High Risk for Rip Currents.
   Storm Surge Watch.
   Hurricane Watch.
   Tropical Storm Warning.

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

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

   High Risk for Rip Currents.
   Storm Surge Watch.
   Hurricane Watch.
   Tropical Storm Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

AMZ352-354-374-GAZ087-088-099>101-114>116-118-137-138-140-SCZ040-042-
043-047-142100-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
Waters from Savannah GA to Altamaha Sound GA out 20 NM, including
Grays Reef National Marine Sanctuary-
Waters from Savannah GA to Altamaha Sound GA extending from 20 to
60 NM-Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans-
Inland Bryan-Inland Chatham-Long-Inland Liberty-Inland McIntosh-
Allendale-Hampton-Inland Colleton-Inland Jasper-
450 PM EDT Thu Sep 13 2018

This Hazardous Weather Outlook is for Atlantic coastal waters,
southeast Georgia and southeast South Carolina.

.DAY ONE...Tonight.

No hazardous weather is expected at this time.

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

Tropical Weather: Hurricane Florence will impact the Southeast coast
through the weekend. Stay tuned to the latest forecast concerning
Florence.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ044-142100-
Dorchester-
450 PM EDT Thu Sep 13 2018

...TROPICAL STORM WARNING IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SUNDAY
AFTERNOON...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...Tonight.

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

   Tropical Storm Warning.

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

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

   Tropical Storm Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ045-142100-
Inland Berkeley-
450 PM EDT Thu Sep 13 2018

...TROPICAL STORM WARNING IN EFFECT...
...HURRICANE WATCH IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SUNDAY
AFTERNOON...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...Tonight.

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

   Hurricane Watch.
   Tropical Storm Warning.

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

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

   Hurricane Watch.
   Tropical Storm Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

AMZ330-350-142100-
Charleston Harbor-
Waters from South Santee River to Edisto Beach SC out 20 NM-
450 PM EDT Thu Sep 13 2018

...TROPICAL STORM WARNING IN EFFECT...
...HURRICANE WATCH IN EFFECT...

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Tonight.

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

   Hurricane Watch.
   Tropical Storm Warning.

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

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

   Hurricane Watch.
   Tropical Storm Warning.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ052-142100-
Tidal Berkeley-
450 PM EDT Thu Sep 13 2018

...TROPICAL STORM WARNING IN EFFECT...
...HURRICANE WATCH IN EFFECT...
...STORM SURGE WATCH IN EFFECT...
...FLASH FLOOD WATCH IN EFFECT FROM FRIDAY MORNING THROUGH SUNDAY
AFTERNOON...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...Tonight.

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

   Storm Surge Watch.
   Hurricane Watch.
   Tropical Storm Warning.

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

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

   Storm Surge Watch.
   Hurricane Watch.
   Tropical Storm Warning.
   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 13, 11:00 AM EDTTropical Storm WarningCHSBerkeley, Dorchester52 hr

Nearby

Flash Flood Watches in South Carolina, 2018Every flash flood watch in 2018

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.