Public Information Statement
Issued by NWS Columbia, SC

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Public Information Statement...Correct Date
National Weather Service
850 AM Fri May 19 2017

...Climate Summary for April 2017...

...Warmest April on Record at both Columbia and Augusta...
...Multiple Flash Flood Events at Rocky Branch Creek...
...Multiple Severe Weather Events across the area...
...Tornadoes in Aiken...Calhoun...Edgefield...Saluda and
Lexington Counties...


April was a very active month across the Midlands and Central
Savannah River Area. It was the warmest April on Record at both
Augusta and Columbia as temperatures averaged 5 to 7 degrees above
normal. Precipitation was generally above normal across the area.
There were several active events that produced
tornadoes...microburst...wind damage...flash flooding and river
flooding. Severe thunderstorms produced 5 tornadoes across the area
during April. There were two tornadoes in Aiken County, one an EF0
near the town of Aiken and the second an EF1 near Monetta. There was
an EF2 tornado in Calhoun county near the town of Cameron. There was
an EF2 tornado that moved from Edgefield county into Saluda county
affecting the towns of Johnston and Ward. There was an EF0 tornado
in Lexington county near the town of Lexington.


...Augusta Average Temperatures...

The average temperature at Augusta Regional Bush Field for April was
69.3 or 6.6 degrees above the normal of 62.7

...Columbia Average Temperatures...

The average temperature at Columbia Metro Airport for April was 69.4
degrees or 6.0 degrees above the normal of 63.4


...Augusta Rainfall...

Augusta Bush Field received 2.60 inches of rainfall during
April. Normal is 2.84 inches.

...Columbia Rainfall...

Columbia Metro Airport received 6.11 inches of rainfall during
April. Normal is 2.62 inches


Here are some of the highest rainfall CoCoRaHS Reports for April:

SC-SM-1   Sumter 1.3 SE...........9.32 inches
SC-RC-30  Hopkins 3.9 NNE.........9.30 inches
SC-LX-108 Lexington 5.6 SW........9.12 inches
SC-LX-43  Lexington 1.2 SW........8.62 inches
SC-SM-19  Sumter 0.4 SSE..........8.48 inches

GA-BK-8   Waynesboro 10.9 E.......5.63 inches
GA-MD-1   Thomson 2.5 S...........4.07 inches
GA-CU-3   Evans 2.1 NNW...........3.57 inches


Here are some of the highest NWS Coop Observer Reports for April:


HHLS1 Holly Hill..................7.84 inches
PLNS1 Pelion 4 N..................7.44 inches
NRTS1 North 5 NE..................6.97 inches
USCS1 Columbia Univ. of SC........6.73 inches
BLYS1 Cedar Creek.................6.30 inches


Highest Wind Gusts at ASOS Sites during April:

Columbia Metro Airport (CAE)..........68 mph on the 5th
Augusta Bush Field (AGS)..............47 mph on the 3rd
Orangeburg County Airport (OGB).......46 mph on the 3rd
Columbia Hamilton Owens Field (CUB)...45 mph on the 6th
Augusta Daniel Field (DNL)............36 mph on the 6th


Highest Wind Gusts on the area lakes during April:

Lake Murray Towers (IRMS1/USGS).......54 mph on the 6th
Lake Thurmond Dam (CHDS1).............50 mph on the 5th
Lake Murray Flotilla Island (LMFS1)...47 mph on the 6th
Lake Wateree Dam (WATS1)..............40 mph on the 3rd


Highest Wind Gusts at RCWINDS Mesonet Sites for April:

Williams Brice Stadium................65 mph on the 3rd
Lake Murray Dam.......................48 mph on the 6th
Elders Pond...........................46 mph on the 6th
Lake Murray Flotilla Island...........45 mph on the 6th
Pineview-Garners Ferry................45 mph on the 6th


Lake Murray Water Temperatures at The Towers:

Warmest...73.7 degrees on Apr. 21st and 22nd
Coolest...59.2 degrees on Apr. 4th


TEMPERATURE RECORDS TIED OR BROKEN DURING THE MONTH OF
April:

April 3rd...minimum temperature was 63 degrees. Tied the record of
63 set in 2012, 2007 and 1946+.

April 29th...minimum temperature was 70 degrees. Broke the record of
68 set in 1917.

April 30th...minimum temperature was 70 degrees. Broke the record of
68 set in 1881.

April 22nd...maximum temperature was 90 degrees. Tied the record of
90 set in 1985 and 1970.

April 28th...maximum temperature was 92 degrees. Broke the record of
91 degrees set in 2012, 1986 and 1985+.

April 29th...maximum temperature was 91 degrees. Tied the record of
91 set in 2016, 2012 and 1970+.


COLUMBIA...

April 22nd...minimum temperature was 66 degrees. Tied the record of
66 set in 1944 and 1920.

April 29th...minimum temperature was 71 degrees. Tied the record of
71 set in 2014.

April 30th...minimum temperature was 72 degrees. Broke the record of
70 set in 2014.



Events for April 2017...

April 3rd...An upper level trough over northern Texas lifted into the
Midwest. A series of upper level disturbances embedded in the trough
moved over the Southeast during the afternoon and evening. The
associated surface low developed across Missouri and Illinois with a
trailing cold front which moved eastward from Mississippi to South
Carolina through the day. The main area of thunderstorms developed
ahead of the cold front in a quickly advancing line with some
discrete supercells developing in southeastern Georgia. The main and
most significant band of convection, enhanced by a strong low level
jet and moisture transport off of the Gulf of Mexico, pushed quickly
across the Midlands and Central Savannah River Area during the
afternoon and early evening. The combination of moderate atmospheric
instability and very strong vertical wind shear set the stage for a
severe weather outbreak, which included a few tornadoes, strong
damaging straight line winds gusts and a few hail reports.

There were 3 tornadoes associated with this system. An EF0 tornado
touched down near the city of Aiken. The tornado downed several
trees and was on the ground for less than one tenth of a mile and
was 25 yards wide.

The second tornado, an EF1, touched down in Aiken County near Old
Shoals Road just south of Abney Road where it snapped numerous pine
trees. The tornado weakened as it moved in a general eastward
direction, snapping additional pine trees as it crossed Shealy Pond
Road and then Alberta Peach Road before dissipating. The path length
was 1 mile with a width of 100 yards.

The third tornado, and EF2, touched down near the town of Cameron in
Calhoun County. The tornado began near the Orangeburg/Calhoun County
line near Pasture Lane. It continued to move northeast for 6.5
miles. The tornado dissipated just before Highway 6 near Kings Grant
Road. The maximum width was one third of a mile. The most
significant damage occurred along Sikes Road near Belleville Road
and extended eastward to Mossdale Road. A row of power poles were
snapped near their base. Several structures were heavily damaged.
There were numerous hardwood and softwood trees that were either
uprooted or snapped along the path. A pivot tilt irrigation system
was overturned along Highway 176.


April 4th...A mean upper trough axis was west of the region, as a
lead impulse moved through our region in a Southwest flow aloft. At
the surface, a stationary front was stretched across central South
Carolina and Georgia. A cold front to the west came through the
region late that night. Upper energy, diurnal heating, strong low to
mid level jets, and the surface front contributed to moderate to
strong instabilities along with strong shear. This produced severe
thunderstorm activity, including a few tornadoes, along with
numerous reports of strong damaging straight line wind gusts and
large hail. In addition, training cells in a moisture rich
environment, contributed to locally heavy rainfall and flash
flooding.

There were 2 tornadoes associated with the activity. The first
tornado, an EF2, touched down on the east side of the town of
Johnston in Edgefield County near Winthrow Avenue. The tornado
continued northeast through the town of Ward before dissipating
northwest of Ridge Spring in Saluda County. The path was 7.3 miles
long and a maximum width of 1000 yards. The most significant damage
was near Ward where large hardwood trees were uprooted and snapped,
some with the bark stripped off. The top of a concrete silo was
destroyed. The second tornado touched down briefly in Lexington
county near the town of Lexington. The tornado uprooted a large tree
near the intersection of Rollingwood Drive and Old Cherokee Road.

The heavy rainfall produced Flash Flooding along Rocky Branch Creek
and Smith Branch Creek in Columbia. Rocky Branch Creek crested at
11.47 feet, flood stage is 7.2 feet. Smith Branch Creek crested at
10.29 feet, flood stage is 9.0 feet.

The heavy rainfall produced minor river flooding on the Congaree
River at Carolina Eastman. The river crested at 115.1 feet on the
6th, flood stage is 115.0 feet. Stevens Creek at Modoc crested at
22.68 feet, flood stage is 19.0 feet.


April 23-25...A closed upper level area of low pressure moved very
slowly across the Southeast portion of the country. The associated
surface low moved from Georgia across the Carolinas then gradually
off to the northeast of the region. This produced widespread heavy
rainfall across the area. Rainfall amounts for the event ranged from
2 to 6 inches. The heavy rainfall produced minor to moderate river
flooding. The Saluda River at Chappells crested at 14.44 feet on the
26th, flood stage is 14.0 feet. The Wateree River at Lake Wateree
pool crested at 100.98 feet, flood stage is 100.00 feet. The most
significant flooding occurred along the Great Pee Dee River at
Cheraw. Moderate flooding occurred as the river crested at 37.02
feet on the 27th. Flood stage is 30.0 feet.

Here are some rainfall amounts from the event:

Santee 6 WSW (CoCoRaHS).................5.75 inches
Lower Richland Fire Station (RCWINDS)...5.67 inches
Elgin 3 SW (CoCoRaHS)...................5.43 inches
Indian Land 4.7 S (CoCoRaHS)............5.38 inches
Horrell Hill (RCWINDS)..................5.35 inches
Hopkins Water Tower (RCWINDS)...........5.04 inches
Screaming Eagle Road (RCWINDS)..........5.04 inches
Wateree (RCWINDS).......................5.00 inches
Fort Jackson 2 SE (RAWS)................4.60 inches
Jefferson 6 E (RAWS)....................4.47 inches



YEAR TO DATE MONTHLY TEMPERATURE AND PRECIPITATION STATISTICS...

COLUMBIA SC METROPOLITAN AIRPORT 2015/2016/2017 MONTHLY AVERAGE
TEMPERATURES AND DEPARTURES FROM NORMAL...

          AVG HIGH/DEP   AVG LOW/DEP   AVG TEMP   NORM  DEPARTURE
JAN 2015  55.7/-0.3      33.7/ 0.0      44.7      44.8    -0.1
FEB       54.1/-6.2      32.1/-4.7      43.1      48.5    -5.4
MAR       70.3/+2.1      46.9/+3.9      58.6      55.6    +3.0
APR       77.8/+1.5      50.4/+5.7      67.0      63.4    +3.6
MAY       86.0/+2.2      61.0/+1.5      73.5      71.7    +1.8
JUN       93.6/+3.6      71.6/+3.4      82.6      79.1    +3.5
JUL       96.4/+3.7      74.3/+2.7      85.3      82.2    +3.1
AUG       92.9/+2.2      72.2/+1.2      82.6      80.8    +1.8
SEP       85.9/+0.7      67.6/+3.4      76.7      74.7    +2.0
OCT       75.6/-0.5      53.6/+1.5      64.6      64.1    +0.5
NOV       69.4/+2.1      48.6/+6.3      59.0      54.8    +4.2
DEC       70.1/+11.9     50.1/+14.8     60.1      46.7   +13.4

JAN 2016  55.1/-0.9      33.6/-0.1      44.3      44.8    -0.5
FEB       60.1/-0.2      37.9/+1.1      49.0      48.5    +0.5
MAR       75.0/+6.8      49.8/+6.8      62.4      55.6    +6.8
APR       78.1/+1.8      53.6/+3.2      65.8      63.4    +2.4
MAY       83.4/-0.4      61.9/+2.4      72.7      71.7    +1.0
JUN       94.2/+4.2      71.7/+3.5      83.0      79.1    +3.9
JUL       99.2/+6.5      75.2/+3.6      87.2      82.2    +5.0
AUG       93.8/+3.1      74.8/+3.8      84.3      80.8    +3.5
SEP       89.2/+4.0      69.6/+5.4      79.4      74.7    +4.7
OCT       80.5/+4.4      56.0/+3.9      68.3      64.1    +4.2
NOV       70.6/+3.3      41.8/-0.5      56.2      54.8    +1.4
DEC       59.6/+1.4      39.9/+4.6      49.7      46.7    +3.0

JAN 2017  64.5/+8.5      43.0/+9.3      53.7      44.8    +8.9
FEB       71.4/+11.1     43.1/+6.3      57.2      48.5    +8.7
MAR       70.9/+2.7      44.1/+1.1      57.5      55.6    +1.9
APR       81.0/+4.7      57.7/+7.3      69.4      63.4    +6.0


AUGUSTA GA BUSH FIELD 2015/2016/2017 MONTHLY AVERAGE TEMPERATURES
AND DEPARTURES FROM NORMAL...

          AVG HIGH/DEP   AVG LOW/DEP   AVG TEMP   NORM  DEPARTURE
JAN 2015  55.8/-2.1      32.1/-0.7     44.0       45.4    -1.4
FEB       55.4/-6.9      30.1/-5.8     42.8       49.1    -6.3
MAR       71.3/+1.4      45.3/+3.3     58.3       55.9    +2.4
APR       77.8/+0.5      54.9/+6.8     66.3       62.7    +3.6
MAY       86.7/+1.7      58.1/+0.8     72.4       71.1    +1.3
JUN       93.1/+2.1      68.1/+1.9     80.6       78.6    +2.0
JUL       95.8/+2.4      71.3/+1.5     83.6       81.6    +2.0
AUG       91.4/-0.4      69.8/+0.5     80.6       80.5    +0.1
SEP       85.5/-1.2      65.1/+2.5     75.3       74.6    +0.7
OCT       77.7/-2.1      52.4/+1.4     64.0       64.4    -0.4
NOV       70.2/+1.1      47.0/+5.6     58.6       55.2    +3.4
DEC       70.3/+10.3     48.3/+13.8    59.3       47.2   +12.1

JAN 2016  55.3/-2.6      33.1/+0.3     44.2       45.4    -1.2
FEB       61.7/-0.6      37.9/+2.0     49.8       49.0    +0.7
MAR       74.4/+4.5      47.1/+5.1     60.8       55.9    +4.9
APR       77.5/+0.2      50.1/+2.0     63.8       62.7    +1.2
MAY       83.2/-1.8      58.2/+0.9     70.7       71.1    -0.4
JUN       92.2/+1.2      68.8/+2.6     80.5       78.6    +1.9
JUL       97.5/+4.1      71.7/+1.9     84.6       81.6    +3.0
AUG       94.2/+2.4      72.1/+2.8     83.1       80.2    +2.6
SEP       88.9/+2.2      66.0/+3.4     77.4       74.6    +2.8
OCT       82.5/+4.8      53.8/+2.8     68.2       64.4    +3.8
NOV       73.4/+4.3      41.2/-0.2     57.3       55.2    +2.1
DEC       62.4/+2.4      41.8/+7.3     52.4       47.2    +5.2

JAN 2017  67.5/+9.6      43.5/+10.7    55.5       45.4   +10.1
FEB       73.2/+10.9     43.4/+7.5     58.3       49.1    +9.2
MAR       73.7/+3.8      43.8/+1.8     58.8       55.9    +2.9
APR       83.2/+5.9      55.4/+7.3     69.3       62.7    +6.6


COLUMBIA SC METROPOLITAN AIRPORT 2015/2016/2017 MONTHLY
PRECIPITATION...

               TOTAL   NORMAL   DEPARTURE
              (INCHES)
JAN 2015       2.60     3.58    -0.98
FEB            4.76     3.61    +1.15
MAR            2.78     3.73    -0.95
APR            4.03     2.62    +1.41
MAY            1.71     2.97    -1.26
JUN            8.79     4.69    +4.10
JUL            1.53     5.46    -3.93
AUG            4.85     5.26    -0.41
SEP            6.15     3.54    +2.61
OCT           14.46     3.17   +11.29
NOV            5.47     2.74    +2.73
DEC            6.45     3.22    +3.23
ANNUAL        63.58    44.59   +18.99

JAN 2016       1.94     3.58    -1.64
FEB            4.69     3.61    +1.08
MAR            1.88     3.73    -1.85
APR            2.80     2.62    +0.18
MAY            2.61     2.97    -0.36
JUN            2.39     4.69    -2.30
JUL            1.79     5.46    -3.67
AUG            4.83     5.26    -0.43
SEP            6.81     3.54    +3.27
OCT            2.09     3.27    -1.18
NOV            2.01     2.74    -0.73
DEC            3.35     3.22    +0.13
ANNUAL        39.55    44.59    -5.04

JAN 2017       7.04     3.58    +3.46
FEB            1.60     3.61    -2.01
MAR            2.38     3.73    -1.35
CAE            6.11     2.62    +3.49

AUGUSTA GA BUSH FIELD 2015/2016/2017 MONTHLY PRECIPITATION...

               TOTAL   NORMAL   DEPARTURE
              (INCHES)
JAN 2015       2.10     3.91     -1.81
FEB            4.70     3.92     +0.78
MAR            3.04     4.18     -1.14
APR            4.86     2.84     +2.02
MAY            0.93     2.65     -1.72
JUN            3.50     4.72     -1.22
JUL            3.52     4.33     -0.81
AUG            3.74     4.32     -0.58
SEP            4.05     3.22     +0.83
OCT            4.62     3.27     +1.35
NOV            5.41     2.82     +2.59
DEC            6.92     3.39     +3.53
ANNUAL        47.39    43.57     +3.82

JAN 2016       1.66     3.91     -2.25
FEB            3.76     3.92     -0.16
MAR            3.18     4.18     -1.00
APR            4.42     2.84     +1.58
MAY            5.71     2.65     +3.06
JUN            2.87     4.72     -1.85
JUL            1.31     4.33     -3.02
AUG            3.66     4.32     -0.66
SEP            6.81     3.54     +3.27
OCT            4.45     3.17     +1.28
NOV            0.62     2.82     -2.20
DEC            4.41     3.39     +1.02
ANNUAL        38.27    43.57     -5.02

JAN 2017      10.13     3.91     +6.22
FEB            2.11     3.92     -1.81
MAR            1.77     4.18     -2.41
APR            2.60     2.84     -0.24


THE 3-MONTH OUTLOOK FOR SUMMER (June/July/August)...

THE 3-MONTH OUTLOOK FOR June...July and August calls for a 40 to 50
percent chance of above normal temperatures with a equal chances of
above...below and normal precipitation.

GO TO THE CLIMATE PREDICTION CENTER WEB PAGE AT
WWW.CPC.NCEP.NOAA.GOV IN LOWER CASE LETTERS FOR MORE DETAILS AND THE
LATEST OUTLOOKS.


ENSO (EL NINO SOUTHERN OSCILLATION)...
...ENSO Neutral Conditions Are Present...

Equatorial sea surface temperatures are near to above average across
most of the Pacific Ocean. ENSO Neutral and El Nino are nearly
equally favored during the Northern Hemisphere Summer and Fall 2017.

CLIMATE OUTLOOKS AND ENSO DISCUSSIONS COURTESY NOAA CLIMATE
PREDICTION CENTER...WWW.CPC.NOAA.GOV.

Note...much appreciation goes out to our NWS Cooperative Weather
Observers...CoCoRaHS (Community...Collaborative...Rain...Hail and
Snow Network) Observers...South Carolina State Climate Office...
Southeast Regional Climate Center...Richland County Emergency
Services...USGS and local weather partners for the data they provide
throughout the year. Their hard work and dedication is greatly
appreciated.

Temperature records for Columbia go back to 1887 and for Augusta
back to 1873. Precipitation records for Columbia go back to 1878
and for Augusta back to 1871.

ADDITIONAL CLIMATE INFORMATION...INCLUDING CURRENT AND ARCHIVED
DAILY AND MONTHLY SUMMARIES...CAN BE FOUND ON THE NATIONAL WEATHER
SERVICE COLUMBIA SC HOME PAGE AT
HTTP://WWW.WEATHER.GOV/CAE .

$$

VAUGHAN



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