Alert archive / Georgia / Special Weather Statements in 2017

Special Weather Statement, NWS Charleston, SC

September 1, 2017Effingham County, Georgia

NWS Charleston, SC issued this special weather statement at Sep 1, 2017, 2:50 PM EDT for Effingham County, Georgia. It was in force for 25 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 1, 2017, 2:50 PM EDT (18:50 UTC)
Expired: Sep 1, 2017, 3:15 PM EDT
In force: 25 min
Issued by: NWS Charleston, SC

County Effingham County, GA

The radar

The Charleston,SC radar (KCLX), 52 km from the middle of the area, began a volume at 18:53 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, 6.8 hours before the alert went out and 149 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: 1452 J/kg
Mixed-layer CIN: -40 J/kg
Mixed-layer LCL: 797 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 122 m²/s²
0-3 km storm-relative helicity: 146 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 4.8

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 1, 1:23 PM EDT, 1 hour 27 minutes earlier.

Area forecast discussion, Sep 1, 1:23 PM EDT, 1 hour 27 minutes before

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Hazardous weather outlook, Sep 1, 3:39 AM EDT, 11 hours 11 minutes before

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In the hours before

Local storm report, Sep 1, 2:31 PM EDT, 19 minutes before

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Special weather statement, Sep 1, 2:32 PM EDT, 18 minutes before

Special Weather Statement
National Weather Service Charleston SC
232 PM EDT FRI SEP 1 2017

GAZ101-SCZ042-047-011900-
Effingham-Inland Jasper-Hampton-
232 PM EDT FRI SEP 1 2017

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF EFFINGHAM...HAMPTON
AND JASPER COUNTIES...

At 231 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm over Shawnee, or 7 miles north of Springfield,
moving northeast at 30 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, Furman, Garnett, Shawnee, Pineland, Tillman, Tarboro and
Robertville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3238 8145 3253 8148 3274 8108 3247 8098
TIME...MOT...LOC 1831Z 243DEG 36KT 3248 8136

ECT

Special weather statement, Sep 1, 2:50 PM EDT, 0 minutes before

Special Weather Statement
National Weather Service Charleston SC
250 PM EDT FRI SEP 1 2017

GAZ100-101-011915-
Bulloch-Effingham-
250 PM EDT FRI SEP 1 2017

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF BULLOCH AND EFFINGHAM
COUNTIES...

At 250 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm near Stilson, or 8 miles northeast of Bay, moving
northeast at 30 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...
Springfield, Rincon, Guyton, Pineora, Egypt, Marlow, Shawnee and
Stillwell.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3223 8154 3238 8164 3253 8134 3231 8117
TIME...MOT...LOC 1850Z 243DEG 29KT 3232 8150

ECT

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 1, 2:32 PM EDT	Special Weather Statement	CHS	Jasper	28 min
Sep 1, 4:32 PM EDT	Special Weather Statement	CHS	Jasper	28 min
Sep 1, 4:57 PM EDT	Special Weather Statement	CHS	Colleton	48 min
Sep 1, 5:01 PM EDT	Severe Thunderstorm Warning	CHS	Charleston, Colleton, Dorchester	44 min
Sep 1, 5:11 PM EDT	Special Weather Statement	CHS	Jasper	49 min
Sep 1, 5:19 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Colleton, Jasper	56 min
Sep 1, 6:33 PM EDT	Special Marine Warning	CHS		117 min
Sep 1, 4:05 PM EDT	Special Weather Statement	CHS	Effingham	40 min

Nearby

Special Weather Statements in Georgia, 2017 Every special weather statement in 2017

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.