Severe Thunderstorm Warning 30, NWS Columbia, SC

Area Forecast Discussion
National Weather Service Columbia SC
248 PM EDT Mon Apr 3 2017

.SYNOPSIS...
Showers and thunderstorms, with some becoming severe, expected
this afternoon and evening associated with an approaching upper
disturbance and warm front. Dry and warm weather expected on
Tuesday before yet another strong system impacts the area on
Wednesday with another round of severe weather possible. Cooler
and dry Thursday into the weekend as high pressure settles over
the region but windy conditions expected Thursday.

&&

.NEAR TERM /THROUGH TONIGHT/...
Moisture and instability continue increasing across the forecast
area with showers and thunderstorms becoming more numerous.
Main concern through tonight remains the front currently moving
through eastern GA and the potential for severe weather. With
very strong winds aloft and plenty of instability have
coordinated with SPC in the issuance of tornado watch 119
through 9 pm. Expect the main threat of severe weather to begin
arriving in the CSRA between 3 and 4 pm and the Midlands between
4 and 5 pm. Along with the potential for tornadoes the freezing
level and wet bulb zero heights support potential for hail.
Although the cells will be progressing rapidly to the northeast
there is the potential for locally heavy rainfall with rainfall
rates up to 2 inches per hour. Main line of convection will
move east of the forecast area by 9 pm with a few showers and
thunderstorms lingering overnight. Winds will also remain strong
and gusty as the system crosses the area so the lake wind
advisory will remain in effect through 4 am. With cloud cover
and winds persisting overnight expect low temperatures in the
lower 60s.

&&

.SHORT TERM /TUESDAY THROUGH WEDNESDAY NIGHT/...
For Tuesday and Tuesday Night: A return to dry weather expected
behind the front. Do not anticipate much in the way of cooler
temperatures behind the weak front. With more sunshine expected,
afternoon temperatures should climb back into the 80s. The dry
weather will continue for the majority of the overnight hours
Tuesday night. Moisture will begin increasing once again late in
the night across the western counties in advance of the next
approaching weather system, but any rainfall will hold off until
sunrise or later on Wednesday. Lows Tuesday night will remain
mild in the 50s to around 60 degrees.

Wednesday and Wednesday night: Active weather returns. More
severe weather will be possible. Another strong upper trough
will be moving towards the region, with southwesterly flow aloft
in advance of the trough. A surface warm front will once again
be lifting northward through the cwa during the morning, while
the main cold front will still be well west of the area. In
advance of this cold front, a warm, moist, and unstable airmass
is expected to be setting up across the cwa through the day.
Aloft, a strong 850 mb jet will be moving through the area, with
55-60+ knots. The combination of a 500 mb flow that will be
diffluent over the region, and a strong jet max at 250 mb, will
both help to enhance lift over the region by the afternoon.
Strong thunderstorms are expected to develop in a moderately
unstable airmass by the afternoon hours. With the strong low-
level jet, a damaging wind threat will be possible with the
storms. With the expected instability, the threat for hail and
an isolated tornado will also remain. There could be a couple
of rounds of strong storms as well, the first during the
afternoon in the vicinity of the retreating warm front, then the
second round late Wednesday afternoon and into Wednesday night
ahead of the approaching cold front. High temperatures Wednesday
around 80 to the lower 80s, and lows Wednesday night in the
middle 50s.

&&

.LONG TERM /THURSDAY THROUGH MONDAY/...
The front will be exiting the region by Thursday morning, and
very windy conditions are forecast to develop behind the front.
Sustained winds around 20 mph, with wind gusts over 30 in many
areas, appear to be possible during the day. A Lake Wind
Advisory will likely be required during the daytime hours on
Thursday, with the possibility of another one on Friday.

As high pressure builds in behind the front, a return to dry
weather is expected through the entire long term period.
Winds will be out of a northwesterly downslope direction for
much of the period. There will be a noticeable cool down in
regards to temperatures behind this front associated with the
high pressure. Temperature readings will be at or below normal
Thursday through Saturday. By Sunday temperatures return back to
normal, with Monday above normal.

&&

.AVIATION /18Z MONDAY THROUGH SATURDAY/...
Restrictions expected for much of the TAF period...with strong
thunderstorms expected this afternoon and evening.

Line of strong thunderstorms continues marching toward AGS/DNL
with expected arrival time of the leading edge around 19z. Line
expected to arrive in CAE/CUB/OGB between 20 and 21z. Main
concern remains potential for damaging winds and tornadoes. Line
will move east of the terminals by 00z with showers and
isolated thunderstorms continuing into tonight. Expect MVFR
conditions through much of the night with improvement around
daybreak as high pressure and drier air will move into the area.
Winds will be strong and gusty into tonight before slowly
subsiding to around 10 knots overnight.

Potential for LLWS after 06z...however much will depend on
remaining convection and ability of inversion to develop. With
winds continuing overnight fog is not expected.

EXTENDED AVIATION OUTLOOK...Increasing confidence in
restrictions Wednesday and Wednesday night as another system
crosses the region with thunderstorms...possibly severe...along
with strong and gusty winds. Breezy...possibly
windy...conditions expected Wednesday night through Friday.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
GA...Lake Wind Advisory until 4 AM EDT Tuesday for GAZ040-063>065-
     077.
SC...Lake Wind Advisory until 4 AM EDT Tuesday for SCZ015-016-018-
     020>022-025>031-035>038-041.

&&

Hazardous Weather Outlook
National Weather Service Columbia SC
216 PM EDT Mon Apr 3 2017

GAZ040-063>065-077-SCZ018-020-021-025>028-030-035>037-041-041830-
Lincoln-McDuffie-Columbia-Richmond-Burke-McCormick-Newberry-
Fairfield-Edgefield-Saluda-Lexington-Richland-Aiken-Barnwell-
Orangeburg-Calhoun-Bamberg-
216 PM EDT Mon Apr 3 2017

...LAKE WIND ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY...
...TORNADO WATCH 119 IN EFFECT UNTIL 9 PM EDT THIS EVENING...

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Lake Wind Advisory.
   Tornado Watch.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Severe thunderstorms possible again on Wednesday and Wednesday night.
Breezy conditions expected Wednesday night through Friday with a lake
wind advisory likely needed.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

SCZ015-016-022-029-031-038-041830-
Lancaster-Chesterfield-Kershaw-Lee-Sumter-Clarendon-
216 PM EDT Mon Apr 3 2017

...LAKE WIND ADVISORY IN EFFECT UNTIL 4 AM EDT TUESDAY...

This Hazardous Weather Outlook is for the Midlands of South Carolina
and the Central Savannah River area of Georgia.

.DAY ONE...This Afternoon and Tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Lake Wind Advisory.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Severe thunderstorms possible again on Wednesday and Wednesday night.
Breezy conditions expected Wednesday night through Friday with a lake
wind advisory likely needed.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Special Weather Statement
National Weather Service Columbia SC
234 PM EDT MON APR 3 2017

GAZ077-031900-
Burke-
234 PM EDT MON APR 3 2017

...A STRONG THUNDERSTORM WILL AFFECT WESTERN BURKE COUNTY...

At 234 PM EDT, a strong thunderstorm was located 11 miles southwest
of Waynesboro, moving east at 30 mph.

Winds in excess of 40 mph are possible with this storm.

Locations impacted include...
Waynesboro and Vidette.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A tornado watch remains in effect until 900 PM EDT for east central
Georgia.

LAT...LON 3283 8224 3304 8229 3308 8229 3324 8187
      3298 8178 3292 8197 3292 8208 3288 8213
      3287 8213
TIME...MOT...LOC 1834Z 252DEG 26KT 3302 8219

fwa

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
326 PM EDT MON APR 3 2017

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

0310 PM     HAIL             WAYNESBORO              33.09N 82.02W
04/03/2017  U0.25 INCH       BURKE              GA   COUNTY OFFICIAL

            PEA SIZE HAIL REPORTED AT BURKE COUNTY EMA
            OFFICE. .

0308 PM     FUNNEL CLOUD     WAYNESBORO              33.09N 82.02W
04/03/2017                   BURKE              GA   AMATEUR RADIO

            FUNNEL CLOUD REPORTED NEAR THE INTERSECTION
            OF HWY 56 AND HWY 24. .

&&

NWS COLUMBIA SC
IRIS SYSTEM

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
338 PM EDT MON APR 3 2017

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

0315 PM     TSTM WND DMG     9 S LINCOLNTON          33.66N 82.48W
04/03/2017                   LINCOLN            GA   EMERGENCY MNGR

            REPORTED MORE THAN 20 TREES DOWN ALONG
            THOMSON HIGHWY NEAR THE AMITY COMMUNITY AND
            LAKE THURMOND. REPORTED 6 TO 8 TREES SNAPPED
            AT 15 TOP 20 FEET ABOVE THE GROUND. TREES
            ACROSS THE HIGHWAY. BOTH SOFTWOOD AND
            HARDWOOD TREES DAMAGED. .

&&

MJP/LCV

Special Weather Statement
National Weather Service Columbia SC
342 PM EDT MON APR 3 2017

SCZ022-032015-
Kershaw-
342 PM EDT MON APR 3 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT KERSHAW
COUNTY...

At 339 PM EDT, radar indicated a line of strong
thunderstorms in western Kershaw County moving toward
the Lugoff and Camden areas. The storms were moving
northeast near 40 mph.

The line likely contained wind gusts of 40 to 50 mph
and small hail along with brief heavy rain.

A tornado watch is in effect. Remain alert and be
ready to take cover. A small interior room on the
lowest floor usually offers the best protection
from tornadoes.

LAT...LON 3445 8042 3412 8055 3414 8080 3446 8069
TIME...MOT...LOC 1939Z 228DEG 35KT 3439 8072 3416 8080

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
358 PM EDT MON APR 3 2017

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

0330 PM     TSTM WND GST     11 NNW EVANS            33.66N 82.20W
04/03/2017  M49 MPH          COLUMBIA           GA   OFFICIAL NWS OBS

            OBSERVATION EQUIPMENT AT LAKE THURMOND DAM
            RECORDED A WIND GUST OF 49 MPH.

&&

MJP/LCV

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE COLUMBIA SC
405 PM EDT MON APR 3 2017

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

0349 PM     TSTM WND DMG     NORTH AUGUSTA           33.52N 81.96W
04/03/2017                   AIKEN              SC   AMATEUR RADIO

            REPORTED TREES DOWN IN NORTH AUGUSTA.

&&

MJP/LCV