Alert archive / South Carolina / Special Weather Statements in 2021

Special Weather Statement, NWS Charleston, SC

September 22, 2021Colleton County, South Carolina

NWS Charleston, SC issued this special weather statement at Sep 22, 2021, 7:36 PM EDT for Colleton County, South Carolina. It was in force for 24 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
Sep 22, 2021, 7:36 PM EDT (23:36 UTC)
Expired
Sep 22, 2021, 8:00 PM EDT
In force
24 min
Issued by
NWS Charleston, SC
Hail
0.00 in
Wind
55

County Colleton County, SC

The radar

The Charleston,SC radar (KCLX), 54 km from the middle of the area, began a volume at 23:38 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 12:00Z, 11.6 hours before the alert went out and 51 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 2021-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 773 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 2021-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 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
773 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
721 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
-1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 weather statement went out at Sep 22, 3:45 PM EDT, 3 hours 51 minutes earlier.

Area forecast discussion, Sep 22, 3:45 PM EDT, 3 hours 51 minutes before
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Hazardous weather outlook, Sep 22, 3:22 AM EDT, 16 hours 14 minutes before
Hazardous Weather Outlook
National Weather Service Charleston SC
322 AM EDT Wed Sep 22 2021

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>052-230730-
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-
Jenkins-Screven-Candler-Bulloch-Effingham-Tattnall-Evans-
Inland Bryan-Coastal Bryan-Inland Chatham-Coastal Chatham-Long-
Inland Liberty-Coastal Liberty-Inland McIntosh-Coastal McIntosh-
Allendale-Hampton-Inland Colleton-Dorchester-Inland Berkeley-
Inland Jasper-Beaufort-Coastal Colleton-Charleston-Coastal Jasper-
Tidal Berkeley-
322 AM EDT Wed Sep 22 2021

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

.DAY ONE...Today and tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

In the hours before

Special weather statement, Sep 22, 6:14 PM EDT, 1 hour 22 minutes before
Special Weather Statement
National Weather Service Charleston SC
614 PM EDT Wed Sep 22 2021

SCZ044-045-222245-
Inland Berkeley-Dorchester-
614 PM EDT Wed Sep 22 2021

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BERKELEY AND
DORCHESTER COUNTIES...

At 614 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Saint George to
8 miles northeast of Dorchester, and moving east at 10 mph.

HAZARD...excessive cloud to ground lightning.

SOURCE...Radar Indicated.

IMPACT...All outdoor activities should cease. Move indoors
         immediately.

Some locations in the path of these storms include...
Saint George, Dorchester, Ridgeville, Harleyville and Reevesville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms and may lead
to flooding of low lying and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Excessive cloud to ground lightning is occurring with these storms.
Lightning can strike 15 miles away from a thunderstorm. Seek safe
shelter inside a building or vehicle.

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 3313 8003 3306 8059 3306 8061 3321 8071
      3328 8048 3326 8043 3327 8039 3326 8036
      3328 8035 3327 8030 3330 8025 3334 8025
      3336 8023
TIME...MOT...LOC 2214Z 253DEG 10KT 3315 8058 3323 8028

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<45 MPH
Special weather statement, Sep 22, 6:33 PM EDT, 1 hour 3 minutes before
Special Weather Statement
National Weather Service Charleston SC
633 PM EDT Wed Sep 22 2021

GAZ116-137-138-140-222245-
Inland McIntosh-Inland Liberty-Inland Bryan-Long-
633 PM EDT Wed Sep 22 2021

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BRYAN, LIBERTY,
MCINTOSH AND LONG COUNTIES...

At 633 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near McIntosh to
near Gardi, and moving east at 30 mph.

HAZARD...excessive cloud to ground lightning.

SOURCE...Radar Indicated.

IMPACT...All outdoor activities should cease. Move indoors
         immediately.

Some locations in the path of these storms include...
Tibet, Jones, Walthourville, Midway, Riceboro, Flemington, Allenhurst
and Eulonia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms and may lead
to flooding of low lying and poor drainage areas. Do not drive your
vehicle through flooded roadways.

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 3139 8157 3145 8162 3147 8161 3151 8166
      3154 8166 3155 8169 3158 8170 3162 8176
      3182 8157 3177 8127 3176 8126 3172 8127
      3137 8151
TIME...MOT...LOC 2233Z 249DEG 27KT 3181 8149 3157 8173

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<45 MPH
Special weather statement, Sep 22, 6:44 PM EDT, 52 minutes before
Special Weather Statement
National Weather Service Charleston SC
644 PM EDT Wed Sep 22 2021

GAZ116>119-137>141-SCZ047-051-222330-
Inland McIntosh-Coastal Liberty-Inland Liberty-Coastal Chatham-Inland
Chatham-Inland Bryan-Coastal McIntosh-Coastal Bryan-Long-Inland
Jasper-Coastal Jasper-
644 PM EDT Wed Sep 22 2021

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BRYAN, LIBERTY,
MCINTOSH, CHATHAM, LONG AND JASPER COUNTIES...

At 644 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Hardeeville to
near Midway to 6 miles southwest of Tibet, and moving east at 15 mph.

HAZARD...excessive cloud to ground lightning.

SOURCE...Radar Indicated.

IMPACT...All outdoor activities should cease. Move indoors
         immediately.

Some locations in the path of these storms include...
Pooler, Bluffton, Richmond Hill, Tybee Island, Darien, Tibet,
Bellinger Hill Area and Savannah International Airport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms and may lead
to flooding of low lying and poor drainage areas. Do not drive your
vehicle through flooded roadways.

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 3129 8139 3138 8155 3154 8167 3207 8133
      3223 8114 3235 8105 3235 8093 3230 8094
      3230 8100 3222 8101 3217 8095 3212 8096
      3214 8091 3208 8091 3210 8085 3196 8083
      3171 8110 3162 8110 3140 8122 3130 8124
TIME...MOT...LOC 2244Z 274DEG 14KT 3225 8110 3184 8142 3153 8165

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<45 MPH
Special weather statement, Sep 22, 6:46 PM EDT, 50 minutes before
Special Weather Statement
National Weather Service Charleston SC
646 PM EDT Wed Sep 22 2021

SCZ042>045-047>049-051-222330-
Inland Berkeley-Coastal Colleton-Inland Jasper-Coastal
Jasper-Hampton-Beaufort-Inland Colleton-Dorchester-
646 PM EDT Wed Sep 22 2021

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BEAUFORT, HAMPTON,
COLLETON, BERKELEY, DORCHESTER AND JASPER COUNTIES...

At 645 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Canadys to near
Yemassee to near Sheldon, and moving northeast at 20 mph.

HAZARD...excessive cloud to ground lightning.

SOURCE...Radar Indicated.

IMPACT...All outdoor activities should cease. Move indoors
         immediately.

Some locations in the path of these storms include...
Beaufort, Walterboro, Yemassee, Givhans Ferry State Park, Dorchester,
Clarendon, Ridgeville and Cottageville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms and may lead
to flooding of low lying and poor drainage areas. Do not drive your
vehicle through flooded roadways.

Excessive cloud to ground lightning is occurring with these storms.
Lightning can strike 15 miles away from a thunderstorm. Seek safe
shelter inside a building or vehicle.

&&

LAT...LON 3335 8021 3287 8041 3281 8041 3276 8045
      3274 8045 3271 8042 3252 8043 3247 8090
      3272 8095 3311 8070 3326 8039 3326 8036
      3328 8035 3327 8030 3330 8025 3333 8025
TIME...MOT...LOC 2245Z 245DEG 19KT 3307 8069 3272 8088 3254 8085

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<45 MPH
Special weather statement, Sep 22, 7:29 PM EDT, 7 minutes before
Special Weather Statement
National Weather Service Charleston SC
729 PM EDT Wed Sep 22 2021

GAZ138>141-230015-
Inland McIntosh-Coastal Liberty-Inland Liberty-Coastal McIntosh-
729 PM EDT Wed Sep 22 2021

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF LIBERTY AND MCINTOSH
COUNTIES...

At 729 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Sunbury to near
Cox, and moving southeast at 15 mph.

HAZARD...excessive cloud to ground lightning.

SOURCE...Radar Indicated.

IMPACT...All outdoor activities should cease. Move indoors
         immediately.

Some locations in the path of these storms include...
Darien, Jones, Wolf Island, Harris Neck, Eulonia, Valona, Little
Saint Simons Island and South Newport.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with these storms and may lead
to flooding of low lying and poor drainage areas. Do not drive your
vehicle through flooded roadways.

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 3129 8141 3133 8144 3145 8162 3147 8161
      3155 8164 3157 8157 3159 8156 3168 8141
      3165 8128 3162 8122 3154 8118 3157 8116
      3153 8115 3145 8119 3129 8133
TIME...MOT...LOC 2329Z 330DEG 14KT 3178 8123 3140 8157

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...<45 MPH
Special weather statement, Sep 22, 7:36 PM EDT, 0 minutes before
Special Weather Statement
National Weather Service Charleston SC
736 PM EDT Wed Sep 22 2021

SCZ043-044-230000-
Inland Colleton-Dorchester-
736 PM EDT Wed Sep 22 2021

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF COLLETON AND
DORCHESTER COUNTIES...

At 736 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm over Round O, or 7 miles east of Walterboro,
moving northeast at 20 mph.

HAZARD...strong winds 45 to 55 mph and excessive cloud to ground
         lightning.

SOURCE...Radar Indicated.

IMPACT...Expect minor damage to tree limbs and blowing around of
         light, unsecured objects. All outdoor activities should
         cease. Move indoors immediately.

Some locations in the path of this storm include...
Walterboro, Cottageville and Round O.

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 3280 8062 3293 8069 3309 8047 3288 8032
TIME...MOT...LOC 2336Z 238DEG 15KT 3292 8055

MAX HAIL SIZE...0.00 IN
MAX WIND GUST...55 MPH

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 22, 4:48 PM EDTSpecial Weather StatementCHSAllendale27 min
Sep 22, 5:27 PM EDTSpecial Weather StatementCHSJasper33 min
Sep 22, 5:41 PM EDTSpecial Weather StatementCHSDorchester34 min
Sep 22, 6:14 PM EDTSpecial Weather StatementCHSDorchester31 min
Sep 22, 6:46 PM EDTSpecial Weather StatementCHSColleton, Dorchester44 min
Sep 22, 6:55 PM EDTAreal Flood AdvisoryCHSBeaufort, Jasper64 min
Sep 22, 7:13 PM EDTAreal Flood AdvisoryCHSBerkeley, Dorchester62 min
Sep 22, 5:02 PM EDTSpecial Weather StatementCHSEffingham28 min
Sep 22, 6:05 PM EDTSpecial Weather StatementCHSBryan, Liberty40 min
Sep 22, 6:33 PM EDTSpecial Weather StatementCHSMcIntosh12 min
Sep 22, 6:44 PM EDTSpecial Weather StatementCHSChatham, Liberty, McIntosh46 min
Sep 22, 7:29 PM EDTSpecial Weather StatementCHSMcIntosh46 min

Nearby

Special Weather Statements in South Carolina, 2021Every special weather statement 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.