Alert archive / South Carolina / Special Marine Warnings in 2021

Special Marine Warning 72, NWS Charleston, SC

July 20, 2021

NWS Charleston, SC issued this special marine warning at Jul 20, 2021, 3:41 PM EDT. It was in force for 68 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jul 20, 2021, 3:41 PM EDT (19:41 UTC)
Expired: Jul 20, 2021, 4:49 PM EDT
In force: 68 min
Issued by: NWS Charleston, SC
Area: Storm-based polygon
Hail: 0.0 in
Wind: 34.0 mph

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 Jul 20, 1:14 PM EDT, 2 hours 27 minutes earlier.

Area forecast discussion, Jul 20, 1:14 PM EDT, 2 hours 27 minutes before

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Hazardous weather outlook, Jul 20, 4:32 AM EDT, 11 hours 9 minutes before

Hazardous Weather Outlook
National Weather Service Charleston SC
432 AM EDT Tue Jul 20 2021

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>052-210845-
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-
432 AM EDT Tue Jul 20 2021

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

.DAY ONE...Today and tonight.

Excessive Rainfall: Numerous to widespread thunderstorms will
develop across portions of the South Carolina Lowcountry and
Southeast Georgia this afternoon and evening. Minor flooding
of low-lying and poor drainage areas is possible.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

AMZ330-350-352-354-374-210845-
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-
432 AM EDT Tue Jul 20 2021

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...Today and tonight.

Strong Thunderstorms: Clusters of thunderstorms are expected to push
across the nearshore and outer South Carolina and Georgia waters
late this afternoon and evening. These thunderstorms may produce
swaths of wind gusts of 35 knots or greater and excessive lightning.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

In the hours before

Local storm report, Jul 20, 10:31 AM EDT, 5 hours 10 minutes before

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Local storm report, Jul 20, 10:33 AM EDT, 5 hours 8 minutes before

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Local storm report, Jul 20, 10:35 AM EDT, 5 hours 6 minutes before

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Local storm report, Jul 20, 10:37 AM EDT, 5 hours 4 minutes before

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Local storm report, Jul 20, 3:30 PM EDT, 11 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
330 PM EDT TUE JUL 20 2021

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

0330 PM     HEAVY RAIN       3 S SHADOWMOSS          32.81N  80.08W
07/20/2021  M2.14 INCH       CHARLESTON         SC   MESONET

&&

EVENT NUMBER CHS2100458

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 8:32 PM EDT	Special Marine Warning	CHS		118 min
Jul 20, 10:28 AM EDT	Special Marine Warning	CHS		2 hr
Jul 20, 10:32 AM EDT	Special Marine Warning	CHS		118 min
Jul 20, 12:57 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Colleton, Dorchester	108 min
Jul 20, 1:30 PM EDT	Special Marine Warning	CHS		54 min
Jul 20, 2:23 PM EDT	Special Marine Warning	CHS		97 min
Jul 20, 2:47 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston, Dorchester	58 min
Jul 20, 7:39 PM EDT	Special Weather Statement	CHS	Screven	36 min

Nearby

Special Marine Warnings in South Carolina, 2021 Every 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.