Alert archive / South Carolina / Special Weather Statements in 2020

Special Weather Statement, NWS Charleston, SC

March 31, 2020Charleston County, South Carolina

NWS Charleston, SC issued this special weather statement at Mar 31, 2020, 6:01 PM EDT for Charleston County, South Carolina. It was in force for 44 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: Mar 31, 2020, 6:01 PM EDT (22:01 UTC)
Expired: Mar 31, 2020, 6:45 PM EDT
In force: 44 min
Issued by: NWS Charleston, SC

County Charleston County, SC

The radar

The Charleston,SC radar (KCLX), 135 km from the middle of the area, began a volume at 22:03 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, 10.0 hours before the alert went out and 34 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2897 m above ground
0-6 km bulk shear: 70 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 189 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 Mar 31, 5:26 PM EDT, 35 minutes earlier.

Area forecast discussion, Mar 31, 5:26 PM EDT, 35 minutes before

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Hazardous weather outlook, Mar 31, 5:20 PM EDT, 41 minutes before

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In the hours before

Special weather statement, Mar 31, 3:16 PM EDT, 2 hours 45 minutes before

Special Weather Statement
National Weather Service Charleston SC
316 PM EDT Tue Mar 31 2020

GAZ087-088-SCZ040-312000-
Jenkins-Screven-Allendale-
316 PM EDT Tue Mar 31 2020

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF SCREVEN...JENKINS AND
ALLENDALE COUNTIES...

At 316 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Alexander to
near Summertown, and moving east at 50 mph.

  HAZARD...strong winds 45 to 55 mph.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light, unsecured objects.

Some locations in the path of these storms include...
Allendale, Millen, Sylvania, Butts, Fairfax, Hiltonia, Sycamore and
Rocky Ford.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch is in effect. Thunderstorms can produce tornadoes
suddenly, sometimes with little or no warning. Be alert for rapidly
changing weather conditions and be ready to act quickly if severe
weather is observed or a warning is issued.

Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.

&&

LAT...LON 3289 8211 3292 8208 3292 8195 3295 8186
      3291 8176 3304 8156 3310 8161 3316 8154
      3311 8137 3312 8120 3307 8114 3264 8160
      3269 8209 3281 8215
TIME...MOT...LOC 1916Z 265DEG 43KT 3309 8185 3278 8226

Special weather statement, Mar 31, 4:44 PM EDT, 1 hour 17 minutes before

Special Weather Statement
National Weather Service Charleston SC
444 PM EDT Tue Mar 31 2020

SCZ044-045-312115-
Inland Berkeley-Dorchester-
444 PM EDT Tue Mar 31 2020

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

At 444 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Saint George to
near Canadys, and moving east at 65 mph.

  HAZARD...strong winds 45 to 55 mph.

  IMPACT...Expect minor damage to tree limbs and blowing around of
           light, unsecured objects.

Some locations in the path of these storms include...
Summerville, Moncks Corner, Saint George, Givhans Ferry State Park,
Ladson, Dorchester, Ridgeville and Harleyville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A tornado watch is in effect. Thunderstorms can produce tornadoes
suddenly, sometimes with little or no warning. Be alert for rapidly
changing weather conditions and be ready to act quickly if severe
weather is observed or a warning is issued.

Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.

&&

LAT...LON 3341 7997 3304 8005 3303 8039 3305 8040
      3306 8046 3306 8059 3310 8067 3328 8060
      3332 8054 3333 8050 3328 8049 3326 8043
      3326 8036 3328 8035 3327 8030 3330 8025
      3337 8024
TIME...MOT...LOC 2044Z 258DEG 56KT 3326 8054 3310 8061

Local storm report, Mar 31, 4:53 PM EDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
453 PM EDT TUE MAR 31 2020

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

0445 PM     TSTM WND DMG     1 NW SMOAKS             33.10N  80.83W
03/31/2020                   COLLETON           SC   911 CALL CENTER

            A 911 CALL CENTER REPORTED A TREE DOWN ON BEULAH ROAD.

&&

EVENT NUMBER CHS2000105

BRM

Local storm report, Mar 31, 5:04 PM EDT, 57 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHARLESTON SC
504 PM EDT TUE MAR 31 2020

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

0432 PM     TSTM WND DMG     1 NW SMOAKS             33.10N  80.83W
03/31/2020                   COLLETON           SC   911 CALL CENTER

            A 911 CALL CENTER REPORTED A TREE DOWN ON BEULAH ROAD.
            TIME ESTIMATED VIA RADAR DATA.

&&

CORRECTED EVENT TIME...REMARKS

EVENT NUMBER CHS2000105

BRM

Special weather statement, Mar 31, 5:32 PM EDT, 29 minutes before

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Special weather statement, Mar 31, 6:01 PM EDT, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 31, 3:16 PM EDT	Special Weather Statement	CHS	Allendale	44 min
Mar 31, 3:46 PM EDT	Severe Thunderstorm Warning	CHS	Allendale, Hampton	59 min
Mar 31, 4:03 PM EDT	Severe Thunderstorm Warning	CHS	Hampton	42 min
Mar 31, 4:17 PM EDT	Severe Thunderstorm Warning	CHS	Colleton	58 min
Mar 31, 4:29 PM EDT	Severe Thunderstorm Warning	CHS	Colleton, Hampton, Jasper	61 min
Mar 31, 4:34 PM EDT	Special Marine Warning	CHS		86 min
Mar 31, 4:44 PM EDT	Special Weather Statement	CHS	Dorchester	31 min
Mar 31, 5:09 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Charleston, Colleton, Dorchester, Hampton, Jasper	55 min
Mar 31, 5:32 PM EDT	Special Weather Statement	CHS	Berkeley	28 min
Mar 31, 6:00 PM EDT	Special Marine Warning	CHS		2 hr

Nearby

Special Weather Statements in South Carolina, 2020 Every special weather statement in 2020

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.