Lake Wind Advisory 9, NWS Charleston, SC

013 
WWUS72 KCHS 202056
NPWCHS

URGENT - WEATHER MESSAGE
National Weather Service Charleston SC
456 PM EDT Sun Jun 20 2021

SCZ045-210500-
/O.CON.KCHS.LW.Y.0009.000000T0000Z-210621T0900Z/
Inland Berkeley-
Including the cities of Goose Creek and Moncks Corner
456 PM EDT Sun Jun 20 2021

...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT MONDAY FOR
LAKE MOULTRIE...

* WHAT...Southwest winds 15 to 25 knots with gusts up to 30 
  knots and waves 2 to 3 feet.

* WHERE...Lake Moultrie.

* WHEN...Until 5 AM EDT Monday.

* IMPACTS...Strong winds and rough waves on Lake Moultrie will 
  create hazardous conditions for small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters on Lake Moultrie should use extra caution since strong
winds and rough waves can overturn small craft.

&&

$$

150 
WWUS72 KCHS 210249
NPWCHS

URGENT - WEATHER MESSAGE
National Weather Service Charleston SC
1049 PM EDT Sun Jun 20 2021

SCZ045-210900-
/O.CON.KCHS.LW.Y.0009.000000T0000Z-210621T0900Z/
Inland Berkeley-
Including the cities of Goose Creek and Moncks Corner
1049 PM EDT Sun Jun 20 2021

...LAKE WIND ADVISORY REMAINS IN EFFECT UNTIL 5 AM EDT MONDAY FOR
LAKE MOULTRIE...

* WHAT...Southwest winds 10 to 20 knots with gusts up to 30 
  knots and waves 1 to 2 feet.

* WHERE...Lake Moultrie.

* WHEN...Until 5 AM EDT Monday.

* IMPACTS...Strong winds and rough waves on Lake Moultrie will 
  create hazardous conditions for small craft.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Boaters on Lake Moultrie should use extra caution since strong
winds and rough waves can overturn small craft.

&&

$$

902 
WWUS72 KCHS 210720
NPWCHS

URGENT - WEATHER MESSAGE
National Weather Service Charleston SC
320 AM EDT Mon Jun 21 2021

SCZ045-210830-
/O.CAN.KCHS.LW.Y.0009.000000T0000Z-210621T0900Z/
Inland Berkeley-
Including the cities of Goose Creek and Moncks Corner
320 AM EDT Mon Jun 21 2021

...LAKE WIND ADVISORY IS CANCELLED FOR LAKE MOULTRIE...

$$

Area Forecast Discussion
National Weather Service Charleston SC
1154 AM EDT Sun Jun 20 2021

.SYNOPSIS...
Tropical Depression Claudette will move through the Carolinas
tonight and Monday. A cold front will pass through the local
area Tuesday through Wednesday. A broad low pressure trough
will then linger across the region into next weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
Tropical Depression Claudette will move east-northeast from
north central Georgia late this morning to the northern half of
South Carolina by this evening, then to a position near the
North Carolina coast by Monday morning.

Showers and thunderstorms will be possible just about any time
today with a juicy tropical airmass in place, noted by PWats
over 2 inches, but the models continue to indicate higher
coverage will arrive with bands moving in from the southwest
early this afternoon and then shifting towards the northern tier
of counties across southeast South Carolina this evening.
Current storm total rainfall is forecast to be between 2-3
inches over most of the area, although locally higher amounts
are certainly possible as is hinted by some probabilistic
guidance. Coastal southeast Georgia is expected to see slightly
lesser totals with averages of 1-2 inches. Torrential downpours
could lead to localized flooding, and Flood Advisories and
potentially Flash Flood Warnings could be needed. A Flash Flood
Watch remains in effect.

The other main concern is potential for severe weather. Low LCLs
and favorable low level wind fields could support isolated
tornadoes, and SPC continues to highlight the area under a
Slight Risk for severe weather. A Tornado Watch could be
needed. In addition, any of the rainbands will be able to
produce winds of 40-50 mph due to the strength of the low level
jet. Even if those winds are not technically severe, due to the
wet grounds, these could be enough to cause some trees and
powerlines to come down.

Despite extensive cloud cover and the high convective rain
coverage, given how warm it is already, temperatures will still
make it to the lower and middle 80s today. Lows tonight will
only decline about 8-12F from the daytime hours.

Lake Winds: As TC Claudette tracks just north and west of the
region, a Lake Wind Advisory could be needed for Lake Moultrie
this evening. Wind gusts around 20 kt are expected with the
potential for occasional gusts near 25 kt. A Lake Wind Advisory
could be needed.

&&

.SHORT TERM /MONDAY THROUGH WEDNESDAY/...
The remnants of Claudette should be pulling away from the area
Monday morning. A shortwave ridge will build across the
Southeast while a pocket of slightly drier air pushes into the
area. A relatively warm day is in store with highs in the lower
90s. Convective coverage should be reduced by the lack of upper
forcing, however there will be enough moisture and a sea breeze
to trigger at least isolated showers and tstms.

A series of upper shortwaves will move through on Tuesday while
a surface front gradually drops toward the area. Deep tropical
moisture will advect in ahead of the front with PWATs around
2.15". In the afternoon we'll see an increase in upper level
divergence as the right-entrance region of a 115 kt jet streak
moves overhead. Numerous to widespread showers and tstms
expected Tuesday into Tuesday night.

Although the front will continue to push offshore on Wednesday,
an inverted coastal trough will setup along the SC/GA coast.
Plenty of low-level moisture will remain in place. The
combination of convergence within the trough and moderate
surface-based instability should support scattered to numerous
showers/tstms, especially Wednesday afternoon. Although shear
parameters will be quite weak, there could be enough instability
to support a few strong storms.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/...
A weak upper trough is expected to linger to our west late week
into the weekend while an elongated coastal trough at the
surface sits just offshore. Scattered showers and tstms expected
each day, especially during the afternoon and evening. Temps
will be a tad below normal much of the period.

&&

.AVIATION /16Z SUNDAY THROUGH THURSDAY/...
It'll stay unsettled today into tonight due to the affects of
TC Claudette, resulting in periodic flight restrictions, most
especially late this morning, afternoon and at least the first
part of tonight. While we have VCSH and VCTS as the prevailing
weather this morning, we anticipate some heavier bands to move
through from time to time. Any of these bands can produce TSRA,
SHRA or even +SHRA, and flight restrictions at least down into
the MVFR category. In addition, due to strengthening winds
fields across the area as Claudette draws closer by, gusty
surface winds of at least 25-35kt can occur at times.

Late tonight as Claudette moves into North Carolina, the
convective rains will start to diminish in both strength and
coverage. In response, ceilings will drop into the low end range
of MVFR, with even a chance of IFR to occur.

Extended Aviation Outlook: Occasional, brief flight restrictions
are possible in showers/thunderstorms.

&&

.MARINE...
Today through tonight: Tropical Depression Claudette will move
east-northeast from north central Georgia late this morning to
the northern half of South Carolina by this evening, then to a
position near the North Carolina coast by Monday morning.
Although mixing is somewhat curtailed by warm advection, given
geostrophic winds as high as 40 kt, a low level jet of 40-45 kt
and as much as a 3 millibar spread across the marine area,
conditions will become quite hazardous for mariners.

Small Craft Advisories are ongoing across all coastal waters.
We upgraded the Gale Watch to Gale Warnings for all SC zones,
including the Charleston Harbor, for this evening given latest
trends as Claudette passes nearby.

Marine interests should also be alert for bands of heavier
showers with embedded thunderstorms throughout the period.
Expect winds of 30-40 kt at times to occur in the convection,
but even some risk for stronger winds and waterspouts is also
possible. Marine Weather Statements and/or Special marine
Warnings are likely to be periodically issued.

Monday through Friday: Small Craft Advisory conditions could
persist across the Charleston nearshore waters through Monday
night before the SW gradient relaxes. Fairly potent SW flow will
continue into Tuesday across all zones until a front pushes
offshore and the flow weakens. A period of relatively weak winds
is then expected into Thu before a SE flow develops on the
western periphery of Atlantic high pressure.

Rip Currents: Winds will increase significantly today as TC
Claudette moves through Georgia and into South carolina late in
the day. That along with some swell energy and 3-4 foot
breakers, will result in a Moderate Risk of life threatening rip
currents at all beaches today.

Even after TC Claudette pulls further away on Monday, winds
remain elevated, and that along with residual swell energy will
produce an enhanced risk of rip currents again over at least the
South carolina beaches.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...Flash Flood Watch through Monday morning for GAZ087-088-
     099>101-114>119-137>141.
SC...Flash Flood Watch through Monday morning for SCZ040-042>045-
     047>052.
MARINE...Small Craft Advisory until 7 PM EDT this evening for AMZ330-
     350-352.
     Gale Warning from 7 PM this evening to 2 AM EDT Monday for
     AMZ352.
     Gale Warning from 7 PM this evening to 5 AM EDT Monday for
     AMZ330-350.
     Small Craft Advisory until 5 AM EDT Monday for AMZ354.
     Small Craft Advisory until 11 AM EDT Monday for AMZ374.

&&

NEAR TERM...
SHORT TERM...JRL
LONG TERM...JRL
AVIATION...
MARINE...

Hazardous Weather Outlook
National Weather Service Charleston SC
1132 AM EDT Sun Jun 20 2021

GAZ087-088-099>101-114>116-118-137-138-140-SCZ040-042>044-047-052-
211545-
Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans-
Inland Bryan-Inland Chatham-Long-Inland Liberty-Inland McIntosh-
Allendale-Hampton-Inland Colleton-Dorchester-Inland Jasper-
Tidal Berkeley-
1132 AM EDT Sun Jun 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY MORNING...

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

.DAY ONE...This afternoon and tonight.

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

   Flash Flood Watch.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief tornadoes.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

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

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

AMZ330-350-211545-
Charleston Harbor-
Waters from South Santee River to Edisto Beach SC out 20 NM-
1132 AM EDT Sun Jun 20 2021

...GALE WARNING IN EFFECT FROM 7 PM THIS EVENING TO 5 AM EDT
MONDAY...

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This afternoon and tonight.

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

   Gale Warning.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief waterspouts.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

AMZ354-374-211545-
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 from 20 to 60 NM-
1132 AM EDT Sun Jun 20 2021

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This afternoon and tonight.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief waterspouts.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

AMZ352-211545-
Waters from Edisto Beach SC to Savannah GA out 20 NM-
1132 AM EDT Sun Jun 20 2021

...GALE WARNING IN EFFECT FROM 7 PM THIS EVENING TO 2 AM EDT
MONDAY...

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This afternoon and tonight.

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

   Gale Warning.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief waterspouts.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ045-211545-
Inland Berkeley-
1132 AM EDT Sun Jun 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY MORNING...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...This afternoon and tonight.

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

   Flash Flood Watch.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief tornadoes.

Lake Winds: A Lake Wind Advisory could be needed for Lake Moultrie
this evening into Monday morning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

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

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

GAZ117-119-139-141-211545-
Coastal Bryan-Coastal Chatham-Coastal Liberty-Coastal McIntosh-
1132 AM EDT Sun Jun 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY MORNING...
...MODERATE RISK FOR RIP CURRENTS IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for southeast Georgia.

.DAY ONE...This afternoon and tonight.

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

   Flash Flood Watch.
   Moderate Risk for Rip Currents.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief tornadoes.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

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

   Flash Flood Watch.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

SCZ048>051-211545-
Beaufort-Coastal Colleton-Charleston-Coastal Jasper-
1132 AM EDT Sun Jun 20 2021

...FLASH FLOOD WATCH IN EFFECT THROUGH MONDAY MORNING...
...MODERATE RISK FOR RIP CURRENTS IN EFFECT THROUGH MONDAY EVENING...

This Hazardous Weather Outlook is for southeast South Carolina.

.DAY ONE...This afternoon and tonight.

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

   Flash Flood Watch.
   Moderate Risk for Rip Currents.

Severe Thunderstorms: Scattered thunderstorms are possible through
tonight. Conditions could become favorable for isolated damaging
wind gusts or brief tornadoes.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

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

   Flash Flood Watch.
   Moderate Risk for Rip Currents.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
1208 PM EDT SUN JUN 20 2021

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

0300 PM     NON-TSTM WND DMG 3 SW LADSON             32.95N  80.14W
06/19/2021                   DORCHESTER         SC   SOCIAL MEDIA

            SOCIAL MEDIA REPORT SHOWED A TREE DOWN IN THE HARMONY
            SENIOR LIVING PARKING LOT. TIME ESTIMATED FROM RADAR.
            THE WIND GUSTS WERE FROM AN OUTFLOW BOUNDARY.

&&

EVENT NUMBER CHS2100275

CHS