Severe Thunderstorm Warning 65, NWS Charleston, SC

162 
WWUS52 KCHS 302221
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
621 PM EDT TUE MAY 30 2017

GAC029-179-302300-
/O.CON.KCHS.SV.W.0065.000000T0000Z-170530T2300Z/
Bryan GA-Liberty GA-
621 PM EDT TUE MAY 30 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 700 PM EDT
FOR BRYAN AND LIBERTY COUNTIES...

At 621 PM EDT, a severe thunderstorm was located 16 miles south of
Richmond Hill, moving northeast at 20 mph.

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

SOURCE...Radar indicated. 

IMPACT...Expect damage to trees and powerlines. 

Locations impacted include...
Richmond Hill, Riceboro, Belfast, Halfmoon Landing, Retreat, Keller
and Sunbury.

This warning includes I-95 in Georgia between mile markers 70 and 88.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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

&&

LAT...LON 3195 8132 3192 8126 3191 8126 3191 8123
      3189 8124 3190 8122 3189 8122 3189 8120
      3186 8114 3180 8118 3179 8116 3176 8118
      3171 8115 3164 8123 3166 8132 3165 8137
      3171 8144
TIME...MOT...LOC 2221Z 217DEG 16KT 3170 8132 

HAIL...0.88IN
WIND...60MPH
 
$$

958 
WWUS52 KCHS 302239
SVSCHS

Severe Weather Statement
National Weather Service Charleston SC
639 PM EDT TUE MAY 30 2017

GAC029-179-302249-
/O.CAN.KCHS.SV.W.0065.000000T0000Z-170530T2300Z/
Bryan GA-Liberty GA-
639 PM EDT TUE MAY 30 2017

...THE SEVERE THUNDERSTORM WARNING FOR BRYAN AND LIBERTY COUNTIES 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 heavy rain is 
still possible with this thunderstorm.

LAT...LON 3195 8132 3192 8126 3191 8126 3191 8123
      3189 8124 3190 8122 3189 8122 3189 8120
      3186 8114 3180 8118 3179 8116 3176 8118
      3171 8115 3164 8123 3166 8132 3165 8137
      3171 8144
TIME...MOT...LOC 2237Z 203DEG 22KT 3180 8127 

$$

Area Forecast Discussion
National Weather Service Charleston SC
410 PM EDT Tue May 30 2017

.SYNOPSIS...
Weak high pressure will persist over the western Atlantic while
a surface trough resides inland through the weekend. A cold
front may impact the area early next week.

&&

.NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
Until Sunset: Radar indicates the bulk of convection has stayed
just south of our area. CAMs continue to hint at the convective
potential along the GA coast until sunset. However, these same
models have been off on the timing and location of the ongoing
convection. The cap has generally held and the sea breeze
remains within a few miles of the beaches. We backed off POPs to
account for this. However, MLCAPEs are easily exceeding 1,000
J/kg with DCAPEs around 1,000 J/kg. If storms due manage to
develop before sunset, some could become strong. There remains a
risk for damaging winds with some hail, but this risk decreases
as sunset approaches. Further north into SC, slight chance POPs
remain, but this may be overdone given the current trends.

Tonight: Southwesterly flow will persist as the region sits
between Atlantic high pressure and a large upper low situated
north of the Great Lakes. POPs will decrease across the land
areas this evening and overnight. However, new convection is
expected to develop offshore, near the Gulf Stream. With a warm
air mass in place and mostly cloudy skies, temperatures will
only fall into the low 70s for most areas.

&&

.SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/...
Wednesday: Models indicate that a weak mid level short wave will
move through the forecast area during the morning hours and then off
the SC coast early in the afternoon. There may be isolated
convective rains during the morning hours as moisture remains rather
deep across the entire region. During the afternoon, there is some
drying across SC zones and weak NVA in the wake of the short wave.
Diurnal convection during the afternoon and early evening would
likely need to be driven thermodynamically with the sea breeze a
factor in low level moisture convergence. With cloudiness around in
the morning, it will tend to diminish the amount of instability
later in the afternoon and the potential for severe convection
appears low. Our higher POPs were skewed across inland and southern
zones. Highs should average in the upper 80s.

Thursday: Zonal flow aloft will reside, while a weak surface trough
drifts southeast over the region. Drier low to mid levels along with
a lack of upper forcing should result in a mainly dry day along and
to the north of I-16 in GA but cannot rule out isolated convection
further north along the sea breeze in SC. We maintained only slight
diurnal POPs most areas, low end chance POPs along the Altamaha.
A few inland areas may reach 90 with upper 80s along the coastal
corridor.

Friday: Whatever is left of the weak surface front/trough will tend
to dissipate as elevated 1000-850 MB moisture advects northward into
southeast GA and eventually southern SC by late in the day. Isolated
to scattered showers and thunderstorms are expected to develop during
the afternoon and evening hours. Storm motions should be weak with
only modest instability during peak heating. POPs mainly in the low-
end chance across the area with highs once again upper 80s to near
90.

&&

.LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
A more pronounced upper trough pattern over the weekend will
bring increased moisture and better forcing for convection. It's
possible a cold front will move into the area Monday or
Tuesday. We continue to show higher pops during the long term
period.

&&

.AVIATION /20Z TUESDAY THROUGH SUNDAY/...
KCHS: VFR through 18Z Wednesday.
KSAV: VFR is expected through 18Z Wednesday. Radar indicates
thunderstorms to the south of the airport and more development
is possible into this evening. To account for this potential, we
kept VCTS in the TAF until 00Z.

Extended Aviation Outlook: Mainly VFR. Brief flight restrictions
possible in isolated afternoon/evening showers and tstms.

&&

.MARINE...
Tonight: A very weak pressure gradient will keep southwest
winds generally under 10 kt with seas 1-2 feet. Some
thunderstorms are possible, especially closer to the Gulf
Stream.

A weak pressure pattern will persist over the marine area Wednesday
through Friday. The flow will diurnally vary from offshore in the
morning to onshore in the afternoons both Wednesday and Thursday and
trend more onshore on Friday. Speeds will be less than 15 KT with
seas averaging near 2 ft. As subtropical high pressure offshore
strengthens over the weekend, slightly stronger wind fields will
result during the afternoons on Saturday and Sunday. No highlights
are expected. Isolated tstms are possible since steering flow is
from the west, Wednesday and then again on Friday.

&&

.EQUIPMENT...
Afternoon temperature readings from KSAV occasionally appear to
be erroneously running a couple of degrees warmer than
surrounding sites. Technicians have not indicated when they will
resolve the issue. As such, high temperature observations from
the site should be used with caution.

&&

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

&&

NEAR TERM...
SHORT TERM...
LONG TERM...JRL
AVIATION...
MARINE...
EQUIPMENT...

Hazardous Weather Outlook
National Weather Service Charleston SC
336 PM EDT Tue May 30 2017

AMZ330-350-352-354-374-GAZ087-088-099>101-114>119-137>141-SCZ040-
042>045-047>052-311945-
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-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-
336 PM EDT Tue May 30 2017

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

.DAY ONE...This Afternoon and Tonight.

The probability for widespread hazardous weather is low.

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

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
509 PM EDT TUE MAY 30 2017

GAZ140-141-302200-
Inland McIntosh-Coastal McIntosh-
509 PM EDT TUE MAY 30 2017

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

At 509 PM EDT, National Weather Service doppler radar indicated
strong thunderstorms along a line extending from near Mount Pleasant
to near Darien, and moving northeast at 15 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 these storms include...
Darien, Townsend, Crescent, Carnigan, Eulonia, Pine Harbor,
Blackbeard Island and Valona.

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
1-888-383-2024 when it is safe to do so. You can also email your
report to nws.charlestonsc@noaa.gov.

&&

LAT...LON 3135 8152 3140 8158 3143 8161 3144 8161
      3145 8162 3147 8161 3150 8165 3153 8167
      3158 8156 3153 8115 3150 8115 3134 8140
      3133 8145
TIME...MOT...LOC 2109Z 226DEG 11KT 3140 8171 3137 8150

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHARLESTON SC
605 PM EDT TUE MAY 30 2017

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

0541 PM     HAIL             TOWNSEND                31.54N  81.52W
05/30/2017  E1.75 INCH       MCINTOSH           GA   BROADCAST MEDIA

            MEDIA RELAYED A PUBLIC REPORT OF ESTIMATED GOLFBALL
            SIZE HAIL FALLING IN TOWNSEND GEORGIA. TIME ESTIMATED
            BASED ON RADAR.

&&

EVENT NUMBER CHS1700330

JMC