Alert archive / South Carolina / Coastal Flood Warnings in 2021
Coastal Flood Warning 3, NWS Charleston, SC
NWS Charleston, SC issued this coastal flood warning at Nov 6, 2021, 3:39 AM EDT. It took effect at Nov 6, 2021, 8:00 AM EDT. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Nov 6, 2021, 3:39 AM EDT (07:39 UTC)
- In effect from
- Nov 6, 2021, 8:00 AM EDT
- Expired
- Nov 6, 2021, 12:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Charleston, SC
The text
As transmitted.
437
WHUS42 KCHS 060739
CFWCHS
URGENT - IMMEDIATE BROADCAST REQUESTED
Coastal Hazard Message
National Weather Service Charleston SC
339 AM EDT Sat Nov 6 2021
GAZ117-119-139-141-SCZ048-051-061545-
/O.UPG.KCHS.CF.A.0003.211106T1200Z-211106T1600Z/
/O.NEW.KCHS.CF.W.0003.211106T1200Z-211106T1600Z/
/O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/
Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh-
Beaufort-Coastal Jasper-
339 AM EDT Sat Nov 6 2021
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...
...COASTAL FLOOD WARNING IN EFFECT FROM 8 AM THIS MORNING TO NOON
EDT TODAY...
* WHAT...For the Coastal Flood Warning, one to two feet of
inundation above ground level expected along shorelines and
tidal waterways (10.5 to 10.7 feet Mean Lower Low Water at Fort
Pulaski). For the High Surf Advisory, large breaking waves of 5
feet or higher in the surf zone.
* WHERE...In South Carolina, Beaufort and Coastal Jasper
Counties. In Georgia, Coastal Bryan, Coastal Chatham, Coastal
Liberty and Coastal McIntosh Counties.
* WHEN...For the Coastal Flood Warning, from 8 AM this morning
to noon EDT today. For the High Surf Advisory, until 6 AM EST
Sunday.
* IMPACTS...Numerous roads will be flooded, along with some
properties. Highway 80 to Tybee Island will be impassable.
Dangerous swimming and surfing conditions and localized beach
erosion.
* ADDITIONAL DETAILS...High tide will occur around 9:45 AM today
at Fort Pulaski. Saltwater inundation will occur 2 to 3 hours
before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
Time of high total tides are approximate to the nearest hour.
Fort Pulaski GA
MLLW Categories - Minor 9.5 ft, Moderate 10.0 ft, Major 10.5 ft
MHHW Categories - Minor 2.0 ft, Moderate 2.5 ft, Major 3.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 10.6 3.1 1.5 N/A Major
06/10 PM 8.8 1.3 1.0 N/A None
07/10 AM 9.3 1.8 0.4 N/A None
07/10 PM 8.1 0.6 0.6 N/A None
08/11 AM 9.0 1.5 0.4 N/A None
08/11 PM 7.9 0.4 0.7 N/A None
&&
$$
SCZ049-050-061545-
/O.UPG.KCHS.CF.A.0003.211106T1200Z-211106T1600Z/
/O.NEW.KCHS.CF.W.0003.211106T1200Z-211106T1600Z/
/O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/
Coastal Colleton-Charleston-
339 AM EDT Sat Nov 6 2021
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...
...COASTAL FLOOD WARNING IN EFFECT FROM 8 AM THIS MORNING TO NOON
EDT TODAY...
* WHAT...For the Coastal Flood Warning, one to two feet of
inundation above ground level expected along shorelines and
tidal waterways (8.3 to 8.5 feet Mean Lower Low Water at
Charleston). For the High Surf Advisory, large breaking waves of
5 feet or higher in the surf zone.
* WHERE...Coastal Colleton and Charleston Counties.
* WHEN...For the Coastal Flood Warning, from 8 AM this morning
to noon EDT today. For the High Surf Advisory, until 6 AM EST
Sunday.
* IMPACTS...Significant saltwater inundation will render
numerous roads impassable. Properties may also flood.
Dangerous swimming and surfing conditions and localized beach
erosion.
* ADDITIONAL DETAILS...High tide will occur around 9:40 AM today
at Charleston. Saltwater inundation will occur 2 to 3 hours
before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
Time of high total tides are approximate to the nearest hour.
Charleston Harbor SC
MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft
MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 8.4 2.6 1.2 N/A Major
06/10 PM 7.1 1.3 1.2 N/A Minor
07/10 AM 7.4 1.6 0.4 N/A Minor
07/10 PM 6.4 0.6 0.7 N/A None
08/11 AM 7.3 1.5 0.5 N/A Minor
08/10 PM 6.1 0.3 0.8 N/A None
&&
$$
SCZ052-061545-
/O.NEW.KCHS.CF.Y.0037.211106T1200Z-211106T1600Z/
Tidal Berkeley-
339 AM EDT Sat Nov 6 2021
...COASTAL FLOOD ADVISORY IN EFFECT FROM 8 AM THIS MORNING TO
NOON EDT TODAY...
* WHAT...Up to one half foot of inundation above ground level
expected along shorelines and tidal waterways (8.3 to 8.5 feet
Mean Lower Low Water at Charleston).
* WHERE...Southern Berkeley County including Daniel Island.
* WHEN...From 8 AM this morning to noon EDT today.
* IMPACTS...Water may cover some roads and encroach on yards on
Daniel Island.
* ADDITIONAL DETAILS...High tide will occur around 9:40 AM today
at Charleston. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
Time of high total tides are approximate to the nearest hour.
Tidal Berkeley SC
MLLW Categories - Minor 8.0 ft, Moderate 8.5 ft, Major 9.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 2.7 ft, Major 3.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 8.4 2.6 1.2 N/A Minor
06/10 PM 7.1 1.3 1.2 N/A None
07/10 AM 7.4 1.6 0.4 N/A None
07/10 PM 6.4 0.6 0.7 N/A None
08/11 AM 7.3 1.5 0.5 N/A None
08/10 PM 6.1 0.3 0.8 N/A None
&&
$$3 follow-up statements
846
WHUS42 KCHS 061101
CFWCHS
Coastal Hazard Message
National Weather Service Charleston SC
701 AM EDT Sat Nov 6 2021
GAZ117-119-139-141-SCZ048-051-061915-
/O.CON.KCHS.CF.W.0003.211106T1200Z-211106T1600Z/
/O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/
Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh-
Beaufort-Coastal Jasper-
701 AM EDT Sat Nov 6 2021
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY...
* WHAT...For the Coastal Flood Warning, one to two feet of
inundation above ground level expected along shorelines and
tidal waterways (10.5 to 10.7 feet Mean Lower Low Water at
Fort Pulaski). For the High Surf Advisory, large breaking
waves of 5 feet or higher in the surf zone.
* WHERE...In South Carolina, Beaufort and Coastal Jasper
Counties. In Georgia, Coastal Bryan, Coastal Chatham, Coastal
Liberty and Coastal McIntosh Counties.
* WHEN...For the Coastal Flood Warning, from 8 AM this morning
to noon EDT today. For the High Surf Advisory, until 6 AM EST
Sunday.
* IMPACTS...Numerous roads will be flooded, along with some
properties. Highway 80 to Tybee Island will be impassable.
Dangerous swimming and surfing conditions and localized beach
erosion.
* ADDITIONAL DETAILS...High tide will occur around 9:45 AM today
at Fort Pulaski. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
Time of high total tides are approximate to the nearest hour.
Fort Pulaski GA
MLLW Categories - Minor 9.5 ft, Moderate 10.0 ft, Major 10.5 ft
MHHW Categories - Minor 2.0 ft, Moderate 2.5 ft, Major 3.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 10.6 3.1 1.5 N/A Major
06/10 PM 8.8 1.3 1.0 N/A None
07/10 AM 9.3 1.8 0.4 N/A None
07/10 PM 8.1 0.6 0.6 N/A None
08/11 AM 9.0 1.5 0.4 N/A None
08/11 PM 7.9 0.4 0.7 N/A None
&&
$$
SCZ049-050-061915-
/O.CON.KCHS.CF.W.0003.211106T1200Z-211106T1600Z/
/O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/
Coastal Colleton-Charleston-
701 AM EDT Sat Nov 6 2021
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY...
* WHAT...For the Coastal Flood Warning, one to two feet of
inundation above ground level expected along shorelines and
tidal waterways (8.3 to 8.5 feet Mean Lower Low Water at
Charleston). For the High Surf Advisory, large breaking waves
of 5 feet or higher in the surf zone.
* WHERE...Coastal Colleton and Charleston Counties.
* WHEN...For the Coastal Flood Warning, from 8 AM this morning
to noon EDT today. For the High Surf Advisory, until 6 AM EST
Sunday.
* IMPACTS...Significant saltwater inundation will render
numerous roads impassable. Properties may also flood.
Dangerous swimming and surfing conditions and localized beach
erosion.
* ADDITIONAL DETAILS...High tide will occur around 9:40 AM today
at Charleston. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
Time of high total tides are approximate to the nearest hour.
Charleston Harbor SC
MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft
MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 8.4 2.6 1.2 N/A Major
06/10 PM 7.1 1.3 1.2 N/A Minor
07/10 AM 7.4 1.6 0.4 N/A Minor
07/10 PM 6.4 0.6 0.7 N/A None
08/11 AM 7.3 1.5 0.5 N/A Minor
08/10 PM 6.1 0.3 0.8 N/A None
&&
$$
SCZ052-061600-
/O.CON.KCHS.CF.Y.0037.211106T1200Z-211106T1600Z/
Tidal Berkeley-
701 AM EDT Sat Nov 6 2021
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL NOON EDT
TODAY...
* WHAT...Up to one half foot of inundation above ground level
expected along shorelines and tidal waterways (8.3 to 8.5 feet
Mean Lower Low Water at Charleston).
* WHERE...Southern Berkeley County including Daniel Island.
* WHEN...From 8 AM this morning to noon EDT today.
* IMPACTS...Water may cover some roads and encroach on yards on
Daniel Island.
* ADDITIONAL DETAILS...High tide will occur around 9:40 AM today
at Charleston. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
Time of high total tides are approximate to the nearest hour.
Tidal Berkeley SC
MLLW Categories - Minor 8.0 ft, Moderate 8.5 ft, Major 9.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 2.7 ft, Major 3.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 8.4 2.6 1.2 N/A Minor
06/10 PM 7.1 1.3 1.2 N/A None
07/10 AM 7.4 1.6 0.4 N/A None
07/10 PM 6.4 0.6 0.7 N/A None
08/11 AM 7.3 1.5 0.5 N/A None
08/10 PM 6.1 0.3 0.8 N/A None
&&
$$543
WHUS42 KCHS 061317
CFWCHS
Coastal Hazard Message
National Weather Service Charleston SC
917 AM EDT Sat Nov 6 2021
GAZ117-119-139-141-SCZ048-051-062130-
/O.CAN.KCHS.CF.W.0003.000000T0000Z-211106T1600Z/
/O.EXA.KCHS.CF.Y.0037.000000T0000Z-211106T1600Z/
/O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/
Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh-
Beaufort-Coastal Jasper-
917 AM EDT Sat Nov 6 2021
...COASTAL FLOOD ADVISORY IN EFFECT UNTIL NOON EDT TODAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...
...COASTAL FLOOD WARNING IS CANCELLED...
* WHAT...For the High Surf Advisory, large breaking waves of 5
feet or higher in the surf zone. For the Coastal Flood
Advisory, up to one foot of inundation above ground level along
shorelines and tidal waterways (10.0 to 10.2 feet Mean Lower Low
Water at Fort Pulaski).
* WHERE...In South Carolina, Beaufort and Coastal Jasper
Counties. In Georgia, Coastal Bryan, Coastal Chatham, Coastal
Liberty and Coastal McIntosh Counties.
* WHEN...For the High Surf Advisory, until 6 AM EST Sunday. For
the Coastal Flood Advisory, until noon EDT today.
* IMPACTS...Numerous roads may be flooded, along with some
properties. Dangerous swimming and surfing conditions and
localized beach erosion.
* ADDITIONAL DETAILS...High tide will occur around 9:45 AM today
at Fort Pulaski. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
Time of high total tides are approximate to the nearest hour.
Fort Pulaski GA
MLLW Categories - Minor 9.5 ft, Moderate 10.0 ft, Major 10.5 ft
MHHW Categories - Minor 2.0 ft, Moderate 2.5 ft, Major 3.0 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 10.1 2.6 1.0 N/A Moderate
06/10 PM 9.1 1.6 1.3 N/A None
07/10 AM 8.9 1.4 0.0 N/A None
07/10 PM 7.5 0.0 0.0 N/A None
08/11 AM 8.6 1.1 0.0 N/A None
08/11 PM 7.2 -0.3 0.0 N/A None
&&
$$
SCZ049-050-062130-
/O.CON.KCHS.CF.W.0003.000000T0000Z-211106T1600Z/
/O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/
Coastal Colleton-Charleston-
917 AM EDT Sat Nov 6 2021
...COASTAL FLOOD WARNING REMAINS IN EFFECT UNTIL NOON EDT TODAY...
...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY...
* WHAT...For the Coastal Flood Warning, one to two feet of
inundation above ground level along shorelines and tidal
waterways (8.1 to 8.3 feet Mean Lower Low Water at Charleston).
For the High Surf Advisory, large breaking waves of 5 feet or
higher in the surf zone.
* WHERE...Charleston and Coastal Colleton Counties.
* WHEN...For the Coastal Flood Warning, until noon EDT today.
For the High Surf Advisory, until 6 AM EST Sunday.
* IMPACTS...Significant saltwater inundation will render
numerous roads impassable. Properties may also flood.
Dangerous swimming and surfing conditions and localized beach
erosion.
* ADDITIONAL DETAILS...High tide will occur around 9:40 AM today
at Charleston. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Take the necessary actions to protect flood-prone property. If
travel is required, do not drive around barricades or through
water of unknown depth.
Inexperienced swimmers should remain out of the water due to
dangerous surf conditions.
&&
Time of high total tides are approximate to the nearest hour.
Charleston Harbor SC
MLLW Categories - Minor 7.0 ft, Moderate 7.5 ft, Major 8.0 ft
MHHW Categories - Minor 1.2 ft, Moderate 1.7 ft, Major 2.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 8.2 2.4 1.0 N/A Major
06/10 PM 7.3 1.5 1.4 N/A Minor
07/10 AM 7.0 1.2 0.0 N/A Minor
07/10 PM 5.7 -0.1 0.0 N/A None
08/11 AM 6.8 1.0 0.0 N/A None
08/11 PM 5.4 -0.4 0.0 N/A None
&&
$$
SCZ052-061600-
/O.CON.KCHS.CF.Y.0037.000000T0000Z-211106T1600Z/
Tidal Berkeley-
917 AM EDT Sat Nov 6 2021
...COASTAL FLOOD ADVISORY REMAINS IN EFFECT UNTIL NOON EDT
TODAY...
* WHAT...Up to one half foot of inundation above ground level
along shorelines and tidal waterways (8.1 to 8.3 feet Mean
Lower Low Water at Charleston).
* WHERE...Southern Berkeley County including Daniel Island.
* WHEN...Until noon EDT today.
* IMPACTS...Water may cover some roads and encroach on yards on
Daniel Island.
* ADDITIONAL DETAILS...High tide will occur around 9:40 AM today
at Charleston. Saltwater inundation will be possible 1 to 2
hours before and after high tide.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If travel is required, allow extra time as some roads may be
closed. Do not drive around barricades or through water of
unknown depth. Take the necessary actions to protect flood-prone
property.
&&
Time of high total tides are approximate to the nearest hour.
Tidal Berkeley SC
MLLW Categories - Minor 8.0 ft, Moderate 8.5 ft, Major 9.0 ft
MHHW Categories - Minor 2.2 ft, Moderate 2.7 ft, Major 3.2 ft
Total Total Departure
Day/Time Tide Tide from Norm Waves Flood
ft MLLW ft MHHW ft ft Impact
-------- --------- --------- --------- ------- --------
06/10 AM 8.2 2.4 1.0 N/A Minor
06/10 PM 7.3 1.5 1.4 N/A None
07/10 AM 7.0 1.2 0.0 N/A None
07/10 PM 5.7 -0.1 0.0 N/A None
08/11 AM 6.8 1.0 0.0 N/A None
08/11 PM 5.4 -0.4 0.0 N/A None
&&
$$704 WHUS42 KCHS 061602 CFWCHS Coastal Hazard Message National Weather Service Charleston SC 1202 PM EDT Sat Nov 6 2021 SCZ049-050-070015- /O.EXP.KCHS.CF.W.0003.000000T0000Z-211106T1600Z/ /O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/ Coastal Colleton-Charleston- 1202 PM EDT Sat Nov 6 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY... ...COASTAL FLOOD WARNING HAS EXPIRED... * WHAT...Large breaking waves of 5 feet or higher in the surf zone. * WHERE...Charleston and Coastal Colleton Counties. * WHEN...Until 6 AM EST Sunday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. && $$ GAZ117-119-139-141-SCZ048-051-070015- /O.EXP.KCHS.CF.Y.0037.000000T0000Z-211106T1600Z/ /O.CON.KCHS.SU.Y.0003.000000T0000Z-211107T1100Z/ Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh- Beaufort-Coastal Jasper- 1202 PM EDT Sat Nov 6 2021 ...HIGH SURF ADVISORY REMAINS IN EFFECT UNTIL 6 AM EST SUNDAY... ...COASTAL FLOOD ADVISORY HAS EXPIRED... * WHAT...Large breaking waves of 5 feet or higher in the surf zone. * WHERE...Georgia Beaches, Coastal Jasper, and Beaufort. * WHEN...Until 6 AM EST Sunday. * IMPACTS...Dangerous swimming and surfing conditions and localized beach erosion. PRECAUTIONARY/PREPAREDNESS ACTIONS... Inexperienced swimmers should remain out of the water due to dangerous surf conditions. && $$ SCZ052-061715- /O.EXP.KCHS.CF.Y.0037.000000T0000Z-211106T1600Z/ Tidal Berkeley- 1202 PM EDT Sat Nov 6 2021 ...COASTAL FLOOD ADVISORY HAS EXPIRED... The Coastal Flood Advisory has expired. $$
What forecasters said that day
The local office's own words before this coastal flood warning 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 coastal flood warning went out at Nov 6, 1:34 AM EDT, 2 hours 5 minutes earlier.
Area forecast discussion, Nov 6, 1:34 AM EDT, 2 hours 5 minutes before
Area Forecast Discussion
National Weather Service Charleston SC
134 AM EDT Sat Nov 6 2021
.SYNOPSIS...
A coastal storm will bring unsettled weather to our area
through Saturday night. High pressure will then build into the
region next week.
&&
.NEAR TERM /UNTIL 6 AM THIS MORNING/...
Low pressure will be situated off the northeast and east part of
the Florida peninsula, with a strong blocking ridge of high
pressure over the Northeast. Aloft we find a closed low over
southern georgia and northeast Florida shifting east.
Rain will occur in two distinct regions; one along the coastal
counties and over the Atlantic where the best low level
convergence and moisture transport will occur, with a second
region across Georgia in proximity to the low aloft and embedded
short wave energy.
Additional QPF through 6 am looks to be no more than about 1/4
to 1/2 inch.
Temps will drop just a bit more due to evaporative cooling from
the rains, and will end up below climo.
No changes to the Wind Advisory and the Lake Wind Advisory.
&&
.SHORT TERM /6 AM THIS MORNING THROUGH MONDAY/...
Saturday: The mid-levels will consist of a strengthening/amplifying
trough and a closed low within it that'll be moving over the
Southeast. At the surface, strong High pressure over the
northeastern U.S. in the morning will trend offshore with time.
Meanwhile, a strong storm will continue to trend to the northeast
with time, paralleling our coast. The storm is expected to start
moving away from our area overnight. Models still have a deep plume
of moisture on the eastern half of the storm. In fact, PWATs
exceeding 1.5" appear to be right along or just off our coast. These
values are well above normal for this time of year. All of the
models remain in great agreement showing a large area of showers
with this coastal storm. They have come into better agreement
regarding the location and timing of the widespread/heavier showers
and the timing. We don't have the time to break down these details
in this discussion, but the general trend has been wetter. For this
reason, we raised both the POPs and the QPF. The highest QPF remains
along the immediate coast, tapering as one heads inland. The worst
conditions are expected Saturday morning. Winds will be very gusty,
especially along the immediate coast. We have Wind Advisories in
effect for some locations along with a Lake Wind Advisory for
Moultrie. Conditions will improve from southwest to northeast
overnight as the coastal storm moves away and high pressure starts
to build from the west. It's entirely reasonable our GA counties
could be rain-free by daybreak Sunday. Finally, due to all the rain
and north to northeast winds, high temperatures will be well below
normal.
Sunday and Monday: The mid-level trough and its closed low will
slowly move off the coast. The coastal storm will be moving away
from our area Sunday, followed by high pressure building from the
west. The high should settle over the Southeast by Monday. There
could be some remnant showers over our SC counties Sunday morning.
But these will quickly dissipate and move away by Sunday afternoon
as drier air moves into the area. Dry conditions are then anticipate
Sunday night into Monday. Gusty N to NW winds Sunday afternoon will
keep high temperatures well below normal. Low temperatures Sunday
night will also be well below normal due to northwest winds in a
cold air mass. High temperatures are expected to warm up on Monday,
being just a few degrees below normal.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
High pressure will bring dry weather and warmer daytime temperatures
to our area through Thursday. A cold front could bring showers on
Friday.
&&
.AVIATION /06Z SATURDAY THROUGH WEDNESDAY/...
The terminals will remain between deepening low pressure off the
coast of northeast Florida, with a strong ridge of high pressure
from the Northeast into the western Carolinas. This pattern
will support N-NE winds of at least 15-20 kts with gusts as high
as near 30 kt through much of the 06Z TAF period. In addition,
NE winds between 1-2 kft will be as high as 45-50 kt, which will
result in low level wind shear through the majority of the 24
hour TAF cycle.
Light to moderate rains will accompany the winds, eventually
allowing for ceilings to lower into the MVFR or IFR range.
Extended Aviation Outlook: A coastal storm should bring IFR and low-
level wind shear through Saturday night. Gusty NE winds are expected
through Sunday evening.
&&
.MARINE...
Update: ASCAT data this evening indicate that 45 kt winds was
over portions of the outer GA waters. It is reasonable to
assume that Storm force wind gusts were occurring over AMZ374.
In addition, recent runs of the RAP indicate that gusts around
50 kts will occur more frequently Saturday morning into the
early afternoon. Gusts to around 50 kts across the outer GA
waters was also supported by HREF prob of 50kt winds with dBZ>20
over the outer GA waters on Sat, ranging from 30-50 percent. A
Storm Warning is in effect until 7 PM Saturday.
Tonight: Hazardous marine conditions are expected over all coastal
waters tonight as a tight pressure gradient remains in place
between high pressure inland and low pressure lifting off the
northeast Florida and Georgia coasts. Gale Warnings are now in
effect for all waters through the night. The worst conditions
are expected after 06z when gusts to 45 kt will be common,
except around 35 kt in the Charleston Harbor. There is also a
potential for storm force gusts over the outer Georgia waters
late tonight, but confidence in duration and frequency were too
low to hoist a Storm Warning at this time. Seas will build to
7-10 ft across the nearshore waters and 10-15 ft beyond.
Saturday: Dangerous marine conditions are expected. Strong High
pressure over the northeastern U.S. in the morning will trend
offshore with time. Meanwhile, a strong storm will continue to trend
to the northeast with time, paralleling our coast. The interaction
between these two synoptic features will generate a steep surface
gradient. Gale force winds are expected across all of the ocean
waters, with gusts exceeding 40 kt beyond 10 nm during the day and
evening. For the Charleston Harbor, a Gale Warning is in effect
through the evening. Then, near gale force gusts will persist
during the overnight hours for the harbor. As for seas, very
steep, short-period wind waves are expected. Seas are expected
to exceed 10 ft beyond 10 nm and reach near 15 ft across the GA
waters beyond 20 nm. Winds and waves will start to lower late at
night as the low moves away.
Sunday: The coastal low will gradually move away to the northeast.
Meanwhile, high pressure will build from the west. This will cause
winds and seas to trend lower across the waters. The remaining
Gale Warnings should expire during this time period, replaced by
Small Craft Advisories due to gusty winds and elevated seas.
Monday and Tuesday: High pressure will be over the Southeast. Winds
and seas are expected to continue their downward trends, with wind
gusts dropping below 25 kt for all of our ocean waters by late
Monday. However, seas may remain elevated just enough for the GA
waters beyond 20 nm that a Small Craft Advisory could persist there
through Tuesday.
&&
.TIDES/COASTAL FLOODING...
A considerable coastal flood event will continue through Sunday
morning due to a combination of high astronomical tides, strong
NNE winds, and low pressure. Minor to moderate coastal flooding
is anticipated with Saturday evening's high tide while major
coastal flooding is expected during the Saturday/Sunday morning
high tides. It still looks like the Saturday morning high tide
will be the highest of the event since the wind direction/speeds
will be most favorable for surge, and a Coastal Flood Watch has
been issued. Models are trending toward a more offshore wind
component by Sunday morning which should start to bring down the
anomalies late Saturday night.
Another important aspect of the forecast will be the extent of
rainfall. If showers occur around/at the time of high tide, any
future or ongoing flooding could be exacerbated. The best chance
for precip will be this evening through Saturday evening.
In addition, large waves and the strong winds will occur in
tandem with the high tides, resulting in erosion along
beachfront locations.
High Surf: Breakers over 5 feet are expected late tonight into
Saturday in the surf zone. A High Surf Advisory has been issued.
&&
.CLIMATE...
Record Low Maximum Temperatures for Nov 5
CHS: 50 set in 1995
CXM: 52 set in 1950
SAV: 54 set in 1950
Record Low Maximum Temperatures for Nov 6
CHS: 49 set in 1953
CXM: 50 set in 1953
SAV: 54 set in 1953
&&
.CHS WATCHES/WARNINGS/ADVISORIES...
GA...High Surf Advisory until 6 AM EST Sunday for GAZ117-119-139-
141.
Coastal Flood Watch from 8 AM this morning to noon EDT today
for GAZ117-119-139-141.
Wind Advisory until 3 PM EDT this afternoon for GAZ117-119-139-
141.
SC...High Surf Advisory until 6 AM EST Sunday for SCZ048>051.
Coastal Flood Watch from 8 AM this morning to noon EDT today
for SCZ048>051.
Wind Advisory until 3 PM EDT this afternoon for SCZ048-051.
Lake Wind Advisory until 6 AM EST Sunday for SCZ045.
MARINE...Gale Warning until 7 AM EST Sunday for AMZ352-354.
Gale Warning until 11 AM EST Sunday for AMZ350.
Storm Warning until 7 PM EDT this evening for AMZ374.
Gale Warning until midnight EDT tonight for AMZ330.
&&
NEAR TERM...
SHORT TERM...
LONG TERM...
AVIATION...
MARINE...
TIDES/COASTAL FLOODING...
CLIMATE...Hazardous weather outlook, Nov 5, 10:37 PM EDT, 5 hours 2 minutes before
Hazardous Weather Outlook National Weather Service Charleston SC 1037 PM EDT Fri Nov 5 2021 SCZ049-050-070245- Coastal Colleton-Charleston- 1037 PM EDT Fri Nov 5 2021 ...HIGH SURF ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY TO 6 AM EST SUNDAY... ...COASTAL FLOOD WATCH IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SATURDAY MORNING... 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 Surf Advisory. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Surf Advisory. Coastal Flood Watch. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. GAZ117-119-139-141-SCZ048-051-070245- Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh- Beaufort-Coastal Jasper- 1037 PM EDT Fri Nov 5 2021 ...HIGH SURF ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY TO 6 AM EST SUNDAY... ...WIND ADVISORY IN EFFECT FROM 2 AM TO 3 PM EDT SATURDAY... ...COASTAL FLOOD WATCH IN EFFECT FROM 8 AM EDT SATURDAY THROUGH SATURDAY MORNING... 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 Surf Advisory. Wind Advisory. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. High Surf Advisory. Wind Advisory. Coastal Flood Watch. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. AMZ350-070245- Waters from South Santee River to Edisto Beach SC out 20 NM- 1037 PM EDT Fri Nov 5 2021 ...GALE WARNING IN EFFECT UNTIL 11 AM EST SUNDAY... 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. Gale Warning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. AMZ352-354-070245- 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- 1037 PM EDT Fri Nov 5 2021 ...GALE WARNING IN EFFECT UNTIL 7 AM EST SUNDAY... 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. Gale Warning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. GAZ087-088-099>101-114>116-118-137-138-140-SCZ040-042>044-047-070245- Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans- Inland Bryan-Inland Chatham-Long-Inland Liberty-Inland McIntosh- Allendale-Hampton-Inland Colleton-Dorchester-Inland Jasper- 1037 PM EDT Fri Nov 5 2021 This Hazardous Weather Outlook is for southeast Georgia and southeast South Carolina. .DAY ONE...Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. AMZ330-070245- Charleston Harbor- 1037 PM EDT Fri Nov 5 2021 ...GALE WARNING IN EFFECT UNTIL MIDNIGHT EDT SATURDAY NIGHT... 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. Gale Warning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Gale Warning. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. SCZ045-070245- Inland Berkeley- 1037 PM EDT Fri Nov 5 2021 ...LAKE WIND ADVISORY IN EFFECT FROM 2 AM EDT SATURDAY TO 6 AM EST SUNDAY FOR LAKE MOULTRIE... 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. Lake Wind Advisory. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Lake Wind Advisory. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. SCZ052-070245- Tidal Berkeley- 1037 PM EDT Fri Nov 5 2021 This Hazardous Weather Outlook is for southeast South Carolina. .DAY ONE...Tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Minor to moderate coastal flooding is expected with the Saturday morning and Sunday morning high tides. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time. AMZ374-070245- Waters from Savannah GA to Altamaha Sound GA from 20 to 60 NM- 1037 PM EDT Fri Nov 5 2021 ...STORM WARNING IN EFFECT UNTIL 7 PM EDT SATURDAY... 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. Storm Warning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Storm Warning. .SPOTTER INFORMATION STATEMENT... Spotter assistance is not anticipated at this time.
In the hours before
Local storm report, Nov 5, 10:37 PM EDT, 5 hours 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1037 PM EDT FRI NOV 05 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0954 PM HIGH ASTR TIDES 1 E CHARLESTON 32.78N 79.93W
11/05/2021 CHARLESTON SC TIDE GAGE
A MAXIMUM TIDE LEVEL OF 7.17 FT MLLW (1.41 FT MHHW) WAS
OBSERVED AT THE CHARLESTON HARBOR TIDE GAGE. SHALLOW
COASTAL FLOODING TYPICALLY BEGINS ALONG THE COASTS OF
CHARLESTON AND COLLETON COUNTIES WHEN TIDE LEVELS REACH
7.0 FT MLLW (1.24 FT MHHW) IN THE CHARLESTON HARBOR.
&&
EVENT NUMBER CHS2100743
CPMThe office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 5, 9:46 PM EDT | Storm Warning | CHS | 18 hr | |
| Nov 6, 3:39 AM EDT | Coastal Flood Advisory | CHS | 8 hr | |
| Nov 6, 6:59 PM EDT | Coastal Flood Advisory | CHS | 4 hr |
Nearby
Coastal Flood Warnings in South Carolina, 2021Coastal Flood Warnings in Georgia, 2021Every coastal flood warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.