Severe Thunderstorm Warning 93, NWS Charleston, SC

073 
WWUS52 KCHS 312102
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
502 PM EDT THU AUG 31 2017

GAC267-312145-
/O.CON.KCHS.SV.W.0093.000000T0000Z-170831T2145Z/
Tattnall GA-
502 PM EDT THU AUG 31 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR TATTNALL COUNTY...

At 502 PM EDT, a severe thunderstorm was located near Reidsville,
moving east at 30 mph.

HAZARD...60 mph wind gusts and quarter size hail. 

SOURCE...Radar indicated. 

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and powerlines. 

Locations impacted include...
Reidsville, Collins, Cobbtown, Manassas and Gordonia Altamaha State
Park.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Report damage directly to the Charleston National Weather Service at
1-888-383-2024 when it is safe to do so.

&&

LAT...LON 3228 8203 3204 8197 3201 8221 3204 8221
      3218 8218 3223 8221 3232 8223
TIME...MOT...LOC 2102Z 259DEG 24KT 3217 8211 

HAIL...1.00IN
WIND...60MPH
 
$$

753 
WWUS52 KCHS 312116
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
516 PM EDT THU AUG 31 2017

GAC267-312125-
/O.CAN.KCHS.SV.W.0093.000000T0000Z-170831T2145Z/
Tattnall GA-
516 PM EDT THU AUG 31 2017

...THE SEVERE THUNDERSTORM WARNING FOR TATTNALL COUNTY IS
CANCELLED...
                
The storm which prompted the Warning has weakened below severe 
limits, and no longer pose an immediate threat to life or property.
Therefore the Warning has been cancelled.  However gusty winds 
and heavy rain are still possible with this thunderstorm.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
Charleston.

LAT...LON 3228 8203 3204 8197 3201 8221 3204 8221
      3218 8218 3223 8221 3232 8223
TIME...MOT...LOC 2110Z 261DEG 24KT 3218 8200 

$$

Area Forecast Discussion
National Weather Service Charleston SC
356 PM EDT Thu Aug 31 2017

.SYNOPSIS...
A warm front will lift north of the region through Friday
morning as Tropical Depression Harvey moves across the lower
Mississippi Valley. A cold front will approach from the north
this weekend. High pressure will then prevail early next week
before another front approaches the region during the second
half of next week.

&&

.NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
Isolated to scattered convection has developed across the area
this afternoon as instability has increased while a fairly
cohesive band of convection also approaches from the west.
Storms could intensify as they push east toward the coast as
they meet up with the sea breeze and damaging winds are possible
within the strongest storms. Also cannot completely rule out an
isolated tornado well inland closer to the warm front and
highest low- level helicity. After this line pushes offshore
this evening we expect mostly dry conditions overnight.
Increasing low-level jetting will keep temperatures warmer than
last night, mainly mid to upper 70s.

&&

.SHORT TERM /6 AM FRIDAY MORNING THROUGH SUNDAY/...
Friday and Saturday: Southerly flow between the remnants of Harvey
inland and Atlantic high pressure will continue to advect deep
moisture into the region as a cold front extending from a low
pressure system north of Maine sinks south into North Carolina. This
pattern supports a chance of showers beginning early Friday,
increasing to numerous showers and thunderstorms through the
afternoon and evening. Sufficient surface-based CAPE and shear will
support some strong to marginally-severe thunderstorms, with
greatest potential in northern zones due to closer proximity to the
front. Despite continual degradation of Harvey's remnants, residual
lower surface pressure and heights aloft will make it easy for a
parent low pressure system in Canada to induce secondary, downstream
low pressure formation over the mid-Atlantic states. Guidance
suggests this low pressure will slide offshore into the mid-Atlantic
coastal waters by Sunday evening as it races northeast. Divergence
overhead under the right-entrance region of a passing upper
level jet will contribute to the formation of numerous showers
and thunderstorms over much of the area Friday night into
Saturday, until the bulk of deep-layered moisture shifts
offshore Saturday evening. Temperatures through the period will
be within 1-2 degrees of normal.

Sunday: A relatively drier atmospheric column is expected to fill in
behind the low pressure as it departs the mid-Atlantic region. While
the majority of precipitation will remain offshore, a few showers or
isolated thunderstorms near the coast during the afternoon cannot be
ruled out. Near-normal temperatures are anticipated.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
Dry high pressure will build from the west early next week behind a
low pressure system shifting off the Mid-Atlantic and Northeast
coasts. However, a few showers and/or thunderstorms will be possible
near coastal locations Monday, followed by slightly greater precip
coverage on Tuesday as mid/upper lvl energy shifts along the western
edge of a mid/upper lvl ridge axis over Florida. High pressure
should prevail into mid week ahead of a large mid/upper lvl trough
of low pressure expanding over the Central United States. A cold
front associated with this feature should then sweep across much of
the Eastern Conus during the middle of next week. Given the setup, a
southerly flow ahead of the front should support increasing chances
of showers and/or thunderstorms through Wednesday. High temps will
be dependent on cloudy skies and precip coverage, but should peak in
the upper 80s to around 90 degrees, warmest in Southeast Georgia.
Overnight lows should range in the upper 60s/lower 70s Sunday night,
then lower to middle 70s into the middle of next week.

&&

.AVIATION /19Z THURSDAY THROUGH TUESDAY/...
Mainly VFR but guidance coming into better agreement in bringing
a line of thunderstorms through the terms from about 23-02Z,
mainly at KSAV. Strong winds will be possible with these
storms. Low clouds could develop late tonight but confidence is
low so we maintained no mention in the 18Z TAFs.

Extended Aviation Outlook: Probabilities for periods of restrictions
at either terminal due to direct impacts from showers/thunderstorms
will generally increase each day into the weekend. Prevailing VFR
conditions are expected early next week.

&&

.MARINE...
Tonight: Southerly winds to increase as a warm front passes
north through the waters and a stronger low-level jet sets up.
Speeds will increase to 15-20 kt for the Georgia waters with 15
kt across the South Carolina waters. Seas will increase as a
result, reaching 2-4 ft nearshore waters with a solid 4 ft over
the offshore waters. There could be a few gusts to 25 kt after
midnight, mainly near the Gulf Stream, but do not anticipate
the durations to be frequent enough to justify a Small Craft
Advisory.

Friday through Monday: The coastal waters will generally remain
under the influence of Atlantic high pressure, with conditions
expected to remain below Small Craft Advisory levels this weekend
and early next week. In general, south winds will periodically veer
southwest while peaking 15-20 knots early this weekend, before
turning offshore and gradually diminishing to around 10 kts or less
early next week. Seas will range 2-4 feet.

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...None.
SC...None.
MARINE...None.

&&

NEAR TERM...RJB
SHORT TERM...JMC
LONG TERM...
AVIATION...JMC/RJB
MARINE...JMC/RJB

Hazardous Weather Outlook
National Weather Service Charleston SC
1251 PM EDT Thu Aug 31 2017

AMZ330-350-352-354-374-011000-
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 extending from 20 to
60 nm-
1251 PM EDT Thu Aug 31 2017

This Hazardous Weather Outlook is for Atlantic coastal waters.

.DAY ONE...This Afternoon and Tonight.

The probability for widespread hazardous weather is low.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>052-011000-
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-
1251 PM EDT Thu Aug 31 2017

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

.DAY ONE...This Afternoon and Tonight.

Severe Thunderstorms...There is a low potential for a few strong
thunderstorms late this afternoon through early evening capable of
producing damaging winds. Isolated tornadoes will also be possible,
mainly well inland toward the Central Savannah River Area and
southern Midlands.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

The probability for widespread hazardous weather is low.

.SPOTTER INFORMATION STATEMENT...

Spotter assistance is not anticipated at this time.

Special Weather Statement
National Weather Service Charleston SC
433 PM EDT THU AUG 31 2017

GAZ114-312115-
Tattnall-
433 PM EDT THU AUG 31 2017

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF TATTNALL COUNTY...

At 433 PM EDT, National Weather Service doppler radar indicated a
strong thunderstorm 7 miles south of Santa Claus, or 9 miles south of
Lyons, moving east at 25 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 this storm include...
Reidsville, Collins, Cobbtown, Manassas, Gordonia Altamaha State Park
and Mendes.

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 3228 8203 3196 8196 3191 8222 3208 8221
      3218 8218 3223 8221 3232 8223
TIME...MOT...LOC 2033Z 264DEG 20KT 3207 8234

NED