Alert archive / South Carolina / Special Marine Warnings in 2021
Special Marine Warning 2, NWS Charleston, SC
NWS Charleston, SC issued this special marine warning at Feb 15, 2021, 7:39 PM EST. It was in force for 87 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Feb 15, 2021, 7:39 PM EST (00:39 UTC)
- Expired
- Feb 15, 2021, 9:06 PM EST
- In force
- 87 min
- Issued by
- NWS Charleston, SC
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 50.0 mph
The radar
The Charleston,SC radar (KCLX), 128 km from the middle of the area, began a volume at 00:38 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 00:00Z, 0.7 hours before the alert went out and 141 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.
- Mixed-layer CAPE
- 17 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 440 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- 622 m²/s²
- 0-3 km storm-relative helicity
- 717 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted.
568
WHUS52 KCHS 160039
SMWCHS
AMZ352-372-374-160245-
/O.NEW.KCHS.MA.W.0002.210216T0039Z-210216T0245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Special Marine Warning
National Weather Service Charleston SC
739 PM EST Mon Feb 15 2021
The National Weather Service in Charleston has issued a
* Special Marine Warning for...
Coastal waters from Edisto Beach SC to Savannah GA out 20 nm...
Waters from Edisto Beach SC to Savannah GA extending from 20 nm to
40 nm...
Waters from Savannah GA to Altamaha Sound GA extending from 20 nm
to 60 nm...
* Until 945 PM EST.
* At 738 PM EST, a severe thunderstorm capable of producing
waterspouts was located 10 nm southeast of Tug Rio Caroni, or 22 nm
southwest of R2 Tower, moving northeast at 40 knots.
HAZARD...Waterspouts, wind gusts in excess of 50 knots, and large
hail.
SOURCE...Radar indicated.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Boats could suffer significant structural
damage in high winds and hail. Small craft could capsize
in suddenly higher waves.
* Locations impacted include...
Sayler Barge... Tug Delta Diamond...
R7 Tower... Honey Barge...
Tug Senasqua... Latex Barge...
Dredge Henry... R2 Tower...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor immediately until this storm passes.
wind gusts in excess of 50 knots, large hail, high waves, dangerous
lightning, and heavy rain are possible with this storm.
Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.
Frequent lightning is occurring with this storm. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.
&&
LAT...LON 3124 8092 3161 8077 3172 8064 3185 8055
3213 8024 3197 7982 3195 7987 3181 8000
3171 8014 3158 7988 3114 8043
TIME...MOT...LOC 0038Z 211DEG 38KT 3111 8086
WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...50KTS
$$4 follow-up statements
344
FZUS72 KCHS 160110
MWSCHS
Marine Weather Statement
National Weather Service Charleston SC
810 PM EST Mon Feb 15 2021
AMZ352-372-374-160245-
/O.CON.KCHS.MA.W.0002.000000T0000Z-210216T0245Z/
810 PM EST Mon Feb 15 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM EST...
For the following areas...
Coastal waters from Edisto Beach SC to Savannah GA out 20 nm...
Waters from Edisto Beach SC to Savannah GA extending from 20 nm to 40
nm...
Waters from Savannah GA to Altamaha Sound GA extending from 20 nm to
60 nm...
At 810 PM EST, a severe thunderstorm capable of producing waterspouts
was located near R2 Tower, moving northeast at 35 knots.
HAZARD...Waterspouts, wind gusts in excess of 50 knots, and large
hail.
SOURCE...Radar indicated.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Boats could suffer significant structural
damage in high winds and hail. Small craft could capsize in
suddenly higher waves.
Locations impacted include...
Sayler Barge... Tug Delta Diamond...
R7 Tower... Honey Barge...
Tug Senasqua... Latex Barge...
Dredge Henry... R2 Tower...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor immediately until this storm passes.
wind gusts in excess of 50 knots, large hail, high waves, dangerous
lightning, and heavy rain are possible with this storm.
Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.
Frequent lightning is occurring with this storm. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.
&&
LAT...LON 3134 8087 3161 8077 3172 8064 3185 8055
3213 8024 3197 7982 3195 7987 3181 8000
3171 8014 3158 7988 3117 8046
TIME...MOT...LOC 0110Z 231DEG 37KT 3132 8057
WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...50KTS
$$183
FZUS72 KCHS 160132
MWSCHS
Marine Weather Statement
National Weather Service Charleston SC
832 PM EST Mon Feb 15 2021
AMZ352-372-374-160245-
/O.CON.KCHS.MA.W.0002.000000T0000Z-210216T0245Z/
832 PM EST Mon Feb 15 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM EST...
For the following areas...
Coastal waters from Edisto Beach SC to Savannah GA out 20 nm...
Waters from Edisto Beach SC to Savannah GA extending from 20 nm to 40
nm...
Waters from Savannah GA to Altamaha Sound GA extending from 20 nm to
60 nm...
At 832 PM EST, a severe thunderstorm capable of producing
waterspouts was located 1 nm northeast of R2 Tower, moving northeast
at 40 knots.
HAZARD...Waterspouts, wind gusts 35 knots or greater, and large
hail.
SOURCE...Radar indicated.
IMPACT...Waterspouts can easily overturn boats and create locally
hazardous seas. Small craft could be damaged in briefly
higher winds and suddenly higher waves. Large hail could
result in structural damage.
Locations impacted include...
R7 Tower... Sayler Barge...
Tug Senasqua... Tug Delta Diamond...
Latex Barge... Dredge Henry...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor immediately until this storm passes.
wind gusts 35 knots or greater, large hail, high waves, dangerous
lightning, and heavy rain are possible with this storm.
Thunderstorms can produce sudden waterspouts. Waterspouts can easily
overturn boats and create locally hazardous seas. Seek safe harbor
immediately.
Frequent lightning is occurring with this storm. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.
&&
LAT...LON 3161 8076 3172 8064 3185 8055 3213 8024
3197 7982 3195 7987 3181 8000 3171 8014
3158 7988 3130 8028
TIME...MOT...LOC 0132Z 231DEG 41KT 3147 8036
WATERSPOUT...POSSIBLE
HAIL...>.75IN
WIND...>34KTS
$$655
FZUS72 KCHS 160156
MWSCHS
Marine Weather Statement
National Weather Service Charleston SC
856 PM EST Mon Feb 15 2021
AMZ352-160205-
/O.CAN.KCHS.MA.W.0002.000000T0000Z-210216T0245Z/
856 PM EST Mon Feb 15 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Coastal waters from Edisto Beach SC to Savannah GA out 20 nm...
The thunderstorm has moved out of the warned area and no longer
poses a significant threat to boaters.
LAT...LON 3164 8034 3180 8029 3203 8000 3197 7982
3195 7987 3181 8000 3171 8014 3158 7988
3147 8015
TIME...MOT...LOC 0155Z 231DEG 33KT 3160 8016
$$
AMZ372-374-160245-
/O.CON.KCHS.MA.W.0002.000000T0000Z-210216T0245Z/
856 PM EST Mon Feb 15 2021
...A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 945 PM EST...
For the following areas...
Waters from Edisto Beach SC to Savannah GA extending from 20 nm to 40
nm...
Waters from Savannah GA to Altamaha Sound GA extending from 20 nm to
60 nm...
At 855 PM EST, a severe thunderstorm was located
14 nm southeast of R7 Tower, moving northeast at 35 knots.
HAZARD...Wind gusts 35 knots or greater and large hail.
SOURCE...Radar indicated.
IMPACT...Small craft could be damaged in briefly higher winds and
suddenly higher waves. Large hail could result in
structural damage.
The severe thunderstorm will remain over mainly open waters.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Boaters should seek safe harbor immediately until this storm passes.
wind gusts 35 knots or greater, large hail, high waves, dangerous
lightning, and heavy rain are possible with this storm.
Frequent lightning is occurring with this storm. If caught on the
open water stay below deck if possible, keep away from ungrounded
metal objects.
&&
LAT...LON 3164 8034 3180 8029 3203 8000 3197 7982
3195 7987 3181 8000 3171 8014 3158 7988
3147 8015
TIME...MOT...LOC 0155Z 231DEG 33KT 3160 8016
HAIL...>.75IN
WIND...>34KTS
$$973
FZUS72 KCHS 160206
MWSCHS
Marine Weather Statement
National Weather Service Charleston SC
906 PM EST Mon Feb 15 2021
AMZ372-374-160216-
/O.CAN.KCHS.MA.W.0002.000000T0000Z-210216T0245Z/
906 PM EST Mon Feb 15 2021
...THE SPECIAL MARINE WARNING IS CANCELLED...
The affected areas were...
Waters from Edisto Beach SC to Savannah GA extending from 20 nm to 40
nm...
Waters from Savannah GA to Altamaha Sound GA extending from 20 nm to
60 nm...
The thunderstorm has moved out of the area and no longer poses a
significant threat to boaters.
LAT...LON 3164 8034 3180 8029 3203 8000 3197 7982
3195 7987 3181 8000 3171 8014 3158 7988
3147 8015
TIME...MOT...LOC 0204Z 211DEG 38KT 3170 8009
$$What forecasters said that day
The local office's own words before this special marine 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 special marine warning went out at Feb 15, 6:38 PM EST, 1 hour 1 minute earlier.
Area forecast discussion, Feb 15, 6:38 PM EST, 1 hour 1 minute before
Area Forecast Discussion
National Weather Service Charleston SC
638 PM EST Mon Feb 15 2021
.SYNOPSIS...
A warm front will lift north through this area this evening as
low pressure passes well to the west. A trailing cold front
will push though late tonight and early Tuesday, with high
pressure to then prevail into Wednesday. A warm front will lift
through the area Wednesday night and early Thursday, followed
by another cold front late Thursday and Thursday night. High
pressure will then prevail through the weekend.
&&
.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
As of early evening the warm front is starting to lift into our
Georgia counties from the south, with a broad surface low moving
into western Georgia. Showers and t-storms will continue to
develop in response to the northward moving front, increasing in
coverage across our area by mid evening.
So far there hasn't been much in the way of surface based
instability, but given the increase in shear and vertical wind
fields along with an increase in buoyancy, some surface based
instability should develop during the mid and late evening. Thus
we still anticipate at least isolated severe t-storms will
occur. This risk can occur either as the line approaching from
the west moves in, but weakens during the late evening and
overnight, and/or as storms come in from the southwest and more
in association with the warm front. Given SIG TOR's that are
non- zero and Supercell Composites as high as 4 to 8 units,
there does remain a low end tornado risk. The SSCRAM and HRRR
guidance depicts an increasing potential for severe winds and
large hail in any t-storms the first part of the night. In fact
the Significant hail Parameter is forecast to be around 1 or 1.5
units, suggesting a large hail risk in isolated storms.
We increased fog coverage based on recent trends and latest
guidance. But given that showers and t-storms will increase in
coverage and winds will also climb as they veer, we do not
anticipate anything more than locally dense fog. The coverage of
all fog will diminish overnight in wake of the cold front.
Minor tweaks were required for temps, dew points and winds based
on latest trends. But the overall consensus is that temperatures
will start to climb with the passage of the warm front, then
fall again behind the cold front late.
Previous discussion...
A surface warm front across the FL panhandle extending northeast
off the GA/SC coasts will gain steam and shift north through
the area this evening as strengthening low pressure across
southern AL moves northeast through the SC Upstate. Increasing
deep moisture, forcing and instability will cause widespread
showers and some thunderstorms across the SC Lowcountry/GA
Coastal Empire at least the first part of the night before
showers end from the southwest after midnight. Low clouds and
some fog are expected into this evening with attention then
quickly turning to the threat for a few severe storms with
damaging winds and/or tornadoes from about 8 pm to 2 am after
the warm front passes and before the cold front passes, ending
earliest across inland GA and lasting latest near the central SC
coast. At this point the threat appears low given the limited
surface- based instability expected but deep layer shear (60+
kt) will be quite conducive for organized convection. In
addition, sea fog could develop and affect coastal areas a good
part of the night.
Temperatures still in the 40s inland to near 60 across eastern
GA will increase this evening ahead of the rain, likely into the
lower to mid 60s (warmest east) which means the daily highs
should be set near midnight. Lows, which could occur after
daybreak in some spots, should range from the mid to upper 40s
inland to lower to mid 50s near and east of I-95.
&&
.SHORT TERM /6 AM TUESDAY MORNING THROUGH THURSDAY/...
Tuesday: We finally get a respite from the wet and soggy pattern of
the past several days, as heights climb aloft with the flow becoming
more zonal or at least quasi-zonal, and surface high pressure builds
from the west behind the departing cold front offshore. It'll take a
few hours before enough dry air penetrates into the area within a
downsloping flow off the Appalachians. But the sunshine will make a
return, and the late morning and afternoon will become mostly sunny
to sunny. However, despite the westerly trajectories, cold advection
in the morning and the saturated grounds negating some of the
effects of the insolation, max temperatures will only be able to
achieve the lower 60s along the coastal corridor, the mid and upper
50s further inland, with even a few lower 50s west of US-301. Winds
much of the day will be gusting, reaching as high as 20 or 25 mph,
maybe even occasionally higher.
Tuesday night: Mainly clear or clear skies along with light winds
will allow for a fairly cold night. Radiational cooling won't be
ideal, but enough to get min temperatures down into the lower and
middle 30s near and west of US-17, with even a few places far inland
down to near or below freezing. Downtown Charleston, near Lake
Moultrie and close to the coast will be in the upper 30s to near 40F.
Wednesday and Wednesday night: Short wave ridging will prevail
aloft, while the next upstream short wave drops through the Central
Plains toward the lower Mississippi Valley. This will cause
cyclogenesis to occur in the northwest Gulf of Mexico. Closer to the
local region, high pressure to the north will weaken and gives way
to a coastal trough/warm front offshore, that lifts into the area at
night.
The first part of Wednesday is still rainfree and the day begins
with mostly sunny skies. But an increase in moisture and isentropic
ascent will lead to skies becoming mostly cloudy in the afternoon.
Eventually there is enough lift provided by the proximity to the
offshore front and also from some upper difluence, to allow for
isolated to scattered showers to develop the second half of the day.
Rain chances will climb further after dark, as forcing
intensifies and moisture deepens considerably. This will lead
to numerous to widespread showers, and given some elevated
instability, there could even be a few t-storms as the warm
front approaches. QPF will be less than 1/10 inch Wednesday, but
as much as 1/4 to 1/2 inch Wednesday night with deepening, warm
cloud layers.
Max temperatures Wednesday will be dependent upon how quickly the
clouds increase and thicken Wednesday. But they presently look to
reach the mid and upper 50s. Temperatures at night will drop several
degrees early on, then hold steady or even climb during the late
evening and overnight hours. By daybreak, some places could be near
60F if the inland wedge is able to break down enough.
Thursday: A highly amplified and deep layered trough will cover much
of the central states and into the Southeast, as a digging short
wave trough aloft drops through the Arklatex and heads toward the
lower Mississippi Valley and western Tennessee Valley.
Simultaneously at the surface, low pressure lifts northeast from the
Gulf of Mexico and reaches in the vicinity of the Central Savannah
River Valley by 00Z Friday. This should allow for the warm front to
have lifted north of the entire region, before a trailing cold front
starts to approach from the west late in the day.
Strengthening wind fields, strong wind shear and considerable
moisture will again lead to elevated PoP, with at least scattered to
numerous coverage of showers to develop. There is also evidence of
more sufficient surface based instability, so not only is there a
risk of t-storms, but also potentially a severe risk if enough
destabilization of the boundary layer is able to occur.
Given the strength of the shear and the proximity to the surface
low, storms will likely organize into a squall line or QLCS
situation upstream, and could reach the forecast area late in the
day and/or at night. QPF looks to average 1/4 to 3/4 inches, but
given the risk for t-storms, locally higher amounts can occur.
850 mb temperatures are as great as 13-14C, and with considerable
warm air advection we still look to reach into the 70s across many
area away from the shoreline.
&&
.LONG TERM /THURSDAY NIGHT THROUGH MONDAY/...
Overnight Thursday, the cold front will sweep through the region,
and numerous showers will continue to impact the area. There still
lies some uncertainty with the progress of the cold front. The
latest 00Z GFS and ECMWF have the cold front progressing
offshore by sunrise on Friday morning. For now, have decreased
POPs to slight chance to chance to account for any lingering
deep moisture associated with the departing surface low. On
Friday, high pressure will build in from the west and drier
air/subsidence will allow for clearing skies and breezy
conditions will last through Friday evening. Thereafter, a
rainfree weekend is then expected with mostly sunny skies.
Temperatures could be tricky overnight on Thursday depending on how
quickly the cold front and precip departs. Though, expect low
temperatures to be above average and in the upper 40s to mid 50s.
Then, through the rest of the weekend, temps will be near or below
average. Generally, highs in the 50s to 60s. Lows will be in the 30s
on Friday and Saturday night.
&&
.AVIATION /23Z MONDAY THROUGH SATURDAY/...
KCHS/KSAV: Moderate confidence through about 15Z/16 with high
confidence thereafter. LIFR ceilings and LIFR/IFR vsbys will
generally prevail until about 06Z followed by improving conditions
for the rest of the overnight with VFR likely returning by 15Z.
Heavier showers and possible thunderstorms will move through this
evening until about 06Z with a few lighter showers possibly
lingering a bit longer. Due to the increasing low-level jet ahead of
an approaching cold front and light surface winds to start the
period there will initially be a risk for low-level wind shear.
Surface winds will increase and become gusty after daybreak with
some gusts near 25 kt, mainly through about 21Z.
Extended Aviation Outlook: VFR will prevail into Wednesday.
Then, with increased moisture from an approaching low pressure
system, flight restrictions will then be possible in low ceilings,
possibly reduced visibilities and periods of showers starting
late Wednesday or Wednesday night, then continuing into early
Friday morning. There could also be isolated t-storms late
Wednesday night into Thursday night. Gusty winds are also
expected Thursday and Friday, and we will need to watch for LLWS
as well. VFR will then return for the bulk of Friday, and
continue into Saturday.
&&
.MARINE...
The warm front has lifted into the southernmost waters, and will
continue to progress north into the South carolina waters during
the mid evening. Winds will veer around to the SE to S and
eventually the SW with the passage of the warm front, with
speeds increasing enough where we still have Small Craft
Advisories on all waters but AMZ354, which will be close to
advisory levels.
The biggest change for the evening update was to increase the
coverage of the fog to "areas". Webcams, coastal observations
and a report from the Charleston Pilots indicate that the fog is
not dense enough to require a Dense Fog Advisory. Given the
increasing winds and also the upcoming convection, we anticipate
that fog coverage will shrink during the overnight period.
Previous discussion...
Tonight: A warm front will move north through the waters this
evening followed by a cold front nearing from the west late.
Increasing winds/seas are expected due to a strengthening
pressure gradient/low-level jet to cause Small Craft Advisory
conditions for all waters, except near the GA coast, although
even there conditions will be pretty close. Otherwise, warmer
and more humid air will move into the area this evening after
the passage of the warm front and this will likely lead to some
sea fog, mainly within 20-30 nm of the coast over the cooler
shelf waters. Increasing winds should keep vsbys from becoming
too low, but a Dense Fog Advisory can not be ruled out. Also,
some strong storms could impact the waters with gusts in excess
of 35 kt and/or isolated waterspouts and Special Marine Warnings
may be needed.
Tuesday: In wake of the exiting cold front, cold air advection along
with large isallobaric pressure rises will equate to a continuation
of Small Craft Advisories for all waters, except AMZ354 as we
begin the day. Eventually the pressure rises will slow and cold
advection will wane, and this will allow for the advisory on the
Edisto to Savannah waters out 20 nm to come to an end by 18Z,
but taking until 21Z to come down in Charleston Harbor, the
AMZ350 and AMZ374 waters.
Tuesday night: Much better marine conditions will encompass the
area, under the control of continental high pressure. Winds and seas
will be well beneath any advisory thresholds.
Wednesday through Thursday night: High pressure to the north will
give way to the development of an inverted trough late in the day,
that transitions into a warm front at night, and lifts north of the
area Thursday. Low pressure that forms in the northwest Gulf of
Mexico Wednesday moves into the Southeast Thursday, with a trailing
cold front to sweep through Thursday night. Winds and seas will
again be on the rise, leading to the potential for Small Craft
Advisories once again beginning late Wednesday or Wednesday night.
There could be a small window of opportunity for sea fog to occur
before winds get too great, and there is also a slight chance of
strong to perhaps severe t-storms Wednesday night through Thursday
night.
Friday through Saturday: Continental high pressure will build from
the west late in the week. Advisory conditions Friday will come down
on Saturday as the core of the high approaches.
&&
.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...Small Craft Advisory from 10 PM this evening to 5 PM EST
Tuesday for AMZ330-350-374.
Small Craft Advisory from 10 PM this evening to 1 PM EST
Tuesday for AMZ352.
&&
NEAR TERM...
SHORT TERM...
LONG TERM...
AVIATION...
MARINE...Hazardous weather outlook, Feb 15, 5:01 PM EST, 2 hours 38 minutes before
Hazardous Weather Outlook National Weather Service Charleston SC 501 PM EST Mon Feb 15 2021 GAZ087-088-099>101-114>118-137>141-SCZ040-042>045-047-161015- Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans- Inland Bryan-Coastal Bryan-Inland Chatham-Long-Inland Liberty- Coastal Liberty-Inland McIntosh-Coastal McIntosh-Allendale-Hampton- Inland Colleton-Dorchester-Inland Berkeley-Inland Jasper- 501 PM EST Mon Feb 15 2021 This Hazardous Weather Outlook is for southeast Georgia and southeast South Carolina. .DAY ONE...Tonight. Severe Thunderstorms: A few severe storms are possible this evening through around midnight across the South Carolina Lowcountry and Georgia Coastal Empire. Damaging winds will be the main threat but can't rule out an isolated tornado or large hail. Stay tuned to NOAA Weather Radio, TV, or your local news source throughout the day for the latest weather information. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Please relay any reports of hazardous weather including, but not limited to large hail, damaging winds and flooding to the National Weather Service in Charleston at 1-888-383-2024. AMZ330-350-352-354-374-161015- Charleston Harbor- Waters from South Santee River to Edisto Beach SC out 20 NM- 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 from 20 to 60 NM- 501 PM EST Mon Feb 15 2021 This Hazardous Weather Outlook is for Atlantic coastal waters. .DAY ONE...Tonight. Severe Thunderstorms: A few severe storms are possible this evening through around midnight across the South Carolina Lowcountry and Georgia Coastal Empire. Damaging winds will be the main threat but can't rule out an isolated tornado or large hail. Stay tuned to NOAA Weather Radio, TV, or your local news source throughout the day for the latest weather information. Dense Fog: Sea fog is expected to develop across the Atlantic waters this evening as warm, moist air moves into the region from the south. At least patchy dense fog could occur with visibilities of 1/2 NM or less. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Please relay any reports of hazardous weather including, but not limited to large hail, damaging winds and flooding to the National Weather Service in Charleston at 1-888-383-2024. GAZ119-SCZ048>052-161015- Coastal Chatham-Beaufort-Coastal Colleton-Charleston-Coastal Jasper- Tidal Berkeley- 501 PM EST Mon Feb 15 2021 This Hazardous Weather Outlook is for southeast Georgia and southeast South Carolina. .DAY ONE...Tonight. Severe Thunderstorms: A few severe storms are possible this evening through around midnight across the South Carolina Lowcountry and Georgia Coastal Empire. Damaging winds will be the main threat but can't rule out an isolated tornado or large hail. Stay tuned to NOAA Weather Radio, TV, or your local news source throughout the day for the latest weather information. Dense Fog: Sea fog is expected to develop across the Atlantic waters this evening as warm, moist air moves into the region from the south. At least patchy dense fog could occur with visibilities of 1/2 NM or less. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Please relay any reports of hazardous weather including, but not limited to large hail, damaging winds and flooding to the National Weather Service in Charleston at 1-888-383-2024.
In the hours before
Special weather statement, Feb 15, 6:33 PM EST, 1 hour 6 minutes before
Special Weather Statement
National Weather Service Charleston SC
633 PM EST Mon Feb 15 2021
GAZ116-117-138>141-160000-
Inland McIntosh-Coastal Liberty-Inland Liberty-Inland Bryan-Coastal
McIntosh-Coastal Bryan-
633 PM EST Mon Feb 15 2021
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BRYAN, LIBERTY AND
MCINTOSH COUNTIES...
At 633 PM EST, National Weather Service doppler radar indicated a
strong thunderstorm over South Newport, or 12 miles east of Tibet,
moving northeast at 65 mph.
HAZARD...up to nickel sized hail.
IMPACT...Minor damage to plants, trees and crops is possible.
Damage to windshields is unlikely.
Some locations in the path of this storm include...
Richmond Hill, Jones, Midway, Riceboro, Harris Neck, South Newport,
Sunbury and Belfast.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3157 8152 3195 8137 3185 8114 3182 8116
3182 8118 3179 8118 3179 8117 3150 8133
TIME...MOT...LOC 2333Z 204DEG 56KT 3162 8139
JRLLocal storm report, Feb 15, 7:14 PM EST, 25 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
714 PM EST MON FEB 15 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0653 PM HAIL RICHMOND HILL 31.94N 81.30W
02/15/2021 M1.00 INCH BRYAN GA SOCIAL MEDIA
MULTIPLE REPORTS VIA SOCIAL MEDIA OF VARYING SIZED HAIL
IN RICHMOND HILL. ONE IMAGE SHOWS HAIL STONES THAT
MEASURE 1 INCH (QUARTER-SIZE).
&&
EVENT NUMBER CHS2100034
BRMSpecial weather statement, Feb 15, 7:19 PM EST, 20 minutes before
Special Weather Statement
National Weather Service Charleston SC
719 PM EST Mon Feb 15 2021
GAZ101-SCZ047-160045-
Effingham-Inland Jasper-
719 PM EST Mon Feb 15 2021
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF EFFINGHAM AND JASPER
COUNTIES...
At 719 PM EST, National Weather Service doppler radar indicated a
strong thunderstorm over Purysburgh, or 9 miles southeast of
Springfield, moving north at 65 mph.
HAZARD...strong winds 45 to 55 mph and up to penny sized hail.
IMPACT...Expect minor damage to tree limbs and blowing around of
light, unsecured objects. Minor hail damage to plants,
trees and crops is possible. Damage to windshields is
unlikely.
Some locations in the path of this storm include...
Ridgeland, Rincon, Hardeeville, Purysburgh, Grahamville, Ebenezer,
Coosawhatchie and Tillman.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Report damage directly to the Charleston National Weather Service at
888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.
&&
LAT...LON 3262 8115 3261 8084 3232 8100 3220 8106
3226 8126
TIME...MOT...LOC 0019Z 197DEG 55KT 3230 8116
JRLLocal storm report, Feb 15, 7:22 PM EST, 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
722 PM EST MON FEB 15 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0707 PM HAIL 2 N POOLER 32.14N 81.25W
02/15/2021 E1.50 INCH CHATHAM GA TRAINED SPOTTER
A TRAINED SPOTTER REPORTED APPROXIMATE PING-PONG BALL
SIZE HAIL VIA A SOCIAL MEDIA IMAGE NEAR THE INTERSECTION
OF POOLER PKWY AND OUTLETS WAY.
&&
EVENT NUMBER CHS2100035
BRMLocal storm report, Feb 15, 7:37 PM EST, 2 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
737 PM EST MON FEB 15 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 PM HAIL POOLER 32.12N 81.25W
02/15/2021 E1.00 INCH CHATHAM GA PUBLIC
NUMEROUS REPORTS FROM THE PUBLIC OF QUARTER-SIZE HAIL
IN THE POOLER/BLOOMINGDALE AREA.
&&
EVENT NUMBER CHS2100036
BRMThe office that day
Everything else NWS Charleston, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 15, 7:01 PM EST | Severe Thunderstorm Warning | CHS | Jasper | 29 min |
| Feb 15, 7:19 PM EST | Special Weather Statement | CHS | Jasper | 26 min |
| Feb 15, 7:27 PM EST | Severe Thunderstorm Warning | CHS | Hampton, Jasper | 32 min |
| Feb 15, 8:59 PM EST | Special Marine Warning | CHS | 61 min | |
| Feb 15, 9:33 PM EST | Special Marine Warning | CHS | 57 min | |
| Feb 15, 9:39 PM EST | Special Marine Warning | CHS | 110 min | |
| Feb 15, 10:15 PM EST | Special Marine Warning | CHS | 2 hr | |
| Feb 15, 10:32 PM EST | Special Marine Warning | CHS | 21 min | |
| Feb 16, 12:07 AM EST | Special Marine Warning | CHS | 33 min | |
| Feb 16, 3:24 AM EST | Marine Dense Fog Advisory | CHS | 5 hr | |
| Feb 16, 11:33 AM EST | River Flood Warning | CHS | Evans | 8 days |
Nearby
Special Marine Warnings in South Carolina, 2021Every special marine 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.