National Weather Service United States Department of Commerce

PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE COLUMBIA SC
520 AM EST MAY 1 2013

...APRIL 2013 WEATHER SUMMARY FOR THE MIDLANDS AND CSRA...

...DROUGHT AS ENDED ACCORDING SC DROUGHT RESPONSE COMMITTEE...
...WAKE LOW PRODUCES GUSTY WINDS ACROSS PORTIONS OF THE AREA ON THE
14TH...
...ABOVE NORMAL PRECIPITATION FOR THE MONTH...
...WIDESPREAD SEVERE WEATHER ACROSS THE AREA ON THE 19TH...
...TWO EF0 TORNADOES TOUCHDOWNED ON THE 28TH...
...HEAVY RAIN THAT ACCOMPANIED THE SEVERE WEATHER ON THE 28TH
CONTINUES TO PRODUCE RIVER FLOODING...


THE PERIOD OF ABOVE NORMAL RAINFALL THAT BEGAN IN DECEMBER 2012
FINALLY BROUGHT AN END TO THE DROUGHT ACROSS SOUTH CAROLINA. ON
APRIL 24TH...THE SOUTH CAROLINA DROUGHT RESPONSE COMMITTEE DECLARED
THAT THE DROUGHT HAD ENDED ACROSS THE STATE. THE SC STATE
CLIMATOLOGIST REPORTED THAT MOST STATIONS ACROSS THE STATE HAVE
REPORTED 100 PERCENT TO 225 PERCENT OF NORMAL RAINFALL OVER THE PAST
60 DAYS. HOWEVER...THE MOST IMPORTANT FACTOR ENDING THE DROUGHT HAS
BEEN ADEQUATE RAINFALL FOR AN EXTENDED 5 MONTH PERIOD WHICH
COINCIDED WITH THE HYDROLOGIC RECHARGE SEASON. THE ACTIVE WEATHER
PATTERN THAT BEGAN IN FEBRUARY CONTINUED THROUGH THE MONTH. THIS
RESULTED IN TEMPERATURES BEING CLOSE TO NORMAL ACROSS THE REGION
WITH ABOVE NORMAL RAINFALL AT MOST LOCATIONS. THE SEVERE WEATHER
SEASON THAT HAD BEEN QUIET FOR MUCH OF THE SPRING BECAME MORE ACTIVE
DURING APRIL AS THERE WERE 3 SEVERE WEATHER EVENTS. MOST OF THE
EVENTS PRODUCED DAMAGING WINDS...HOWEVER 2 EF0 TORNADOES OCCURRED ON
THE 28TH. ONE OF THE TORNADOES WAS IN COLUMBIA COUNTY GA AND THE
OTHER IN FAIRFIELD COUNTY SC.

THE AVERAGE TEMPERATURE AT AUGUSTA REGIONAL BUSH FIELD WAS 62.4
DEGREES OR 0.3 DEGREES BELOW THE NORMAL OF 62.7 DEGREES. THE AVERAGE
TEMPERATURE AT COLUMBIA METRO AIRPORT WAS 65.0 DEGREES OR 1.6
DEGREES ABOVE THE NORMAL OF 63.4 DEGREES.

PRECIPITATION WAS ABOVE NORMAL AT BOTH AUGUSTA AND COLUMBIA FOR THE
MONTH. RAINFALL ACROSS THE AREA AVERAGED BETWEEN 3 AND 5 INCHES. THE
TOTAL RAINFALL AT AUGUSTA REGIONAL BUSH FIELD WAS 4.23 INCHES OR
1.39 INCHES ABOVE THE NORMAL OF 2.84 INCHES. THE TOTAL RAINFALL AT
COLUMBIA METRO AIRPORT WAS 4.63 INCHES OR 2.01 INCHES ABOVE THE
NORMAL OF 2.62 INCHES.

HERE ARE SOME OF RAINFALL TOTALS FROM OUR COCORAHS AND NWS COOP
OBSERVERS:

COCORAHS:

SC-AK-23 AIKEN 1.0 SSW........7.55 INCHES
SC-FR-5  RIDGEWAY 2.8 NE......5.95 INCHES
SC-MC-5  MCCORMICK 2.3 W......5.77 INCHES
SC-AK-14 AIKEN 7.8 SSE........5.34 INCHES
SC-AK-16 AIKEN 8.1 SSE........5.28 INCHES

NWS COOPERATIVE OBSERVERS:

SPRINGFIELD (SPRS1)...........6.54 INCHES
LONGTOWN (LNTS1)..............5.68 INCHES
WAYNESBORO (WYNG1)............5.56 INCHES
WINNSBORO (WNBS1).............5.48 INCHES
ORANGEBURG 2 (ORBS1)..........5.25 INCHES


EVENTS DURING APRIL:

ON THE 11TH...SEVERE PULSE TYPE STORMS DEVELOPED AHEAD OF AN
APPROACHING COLD FRONT. QUARTER SIZE HAIL WAS REPORTED IN
ORANGEBURG...KERSHAW...NEWBERRY AND FAIRFIELD COUNTIES. TREES WERE
REPORTED DOWN IN AIKEN AND NEWBERRY COUNTIES.

ON THE 14TH...AN AREA OF LOW PRESSURE KNOWN AS A WAKE LOW TRACKED
SOUTH OF THE AREA AND BROUGHT A PERIOD OF GUSTY WINDS TO THE CENTRAL
SAVANNAH RIVER AREA AND SOUTHERN MIDLANDS DURING THE EVENING HOURS.
A WAKE LOW IS A MESOSCALE AREA OF LOW PRESSURE THAT TRAILS A
MESOSCALE AREA OF HIGH PRESSURE FOLLOWING A SQUALL LINE. THE TIGHT
GRADIENT BETWEEN THE TWO SYSTEMS CAN PRODUCE STRONG WINDS WHICH ARE
OFTEN ACCOMPANIED BY CLEAR SKIES.

HERE ARE SOME OF THE PEAK WIND GUSTS REPORTED:

AUGUSTA BUSH FIELD (AGS).................41 MPH
COLUMBIA METRO AIRPORT (CAE).............41 MPH
LAKE MURRAY FLOTILLA ISLAND (LMFS1)......40 MPH
BARNWELL REGIONAL AIRPORT (BNL)..........38 MPH
AIKEN MUNICIPAL AIRPORT (AIK)............36 MPH


ON THE 19TH...THIS WAS THE MOST WIDESPREAD EVENT OF THE MONTH AND OF
THE SEVERE WEATHER SEASON. A SQUALL LINE ALONG WITH A FEW INDIVIDUAL
CELLS DEVELOPED AHEAD OF AN APPROACHING COLD FRONT. BOW ECHOES ALONG
THE LINE PRODUCED STRONG DAMAGING WIND GUSTS DOWNING TREES AND
POWERLINES ACROSS THE AREA. THE HARDEST HIT AREA WAS SUMTER COUNTY
AROUND THE TOWN OF DALZELL. ONE SUBDIVISION IN DALZELL REPORTED 47
TREES DOWNED OR LEANING FROM THE STRONG WIND GUSTS.

HERE ARE SOME OF THE PEAK WIND GUSTS REPORTED:

SHAW AFB (SSC)...........................82 MPH
LAKE MURRAY DAM (RICHLAND CO. MESONET)...62 MPH
ORANGEBURG COUNTY AIRPORT (OGB)..........51 MPH
IRMO (RICHLAND CO. MESONET)..............50 MPH


ON THE 28TH...A WARM FRONTAL BOUNDARY THAT STRETCHED FROM THE
NORTHERN CENTRAL SAVANNAH RIVER AREA NORTH AND NORTHEAST INTO THE
WESTERN MIDLANDS WAS A FOCUS FOR ISOLATED SEVERE THUNDERSTORMS. A
SUPERCELL THUNDERSTORM MOVED ACROSS LINCOLN AND COLUMBIA COUNTIES IN
GEORGIA ALONG THE LITTLE RIVER BRANCH OF LAKE THURMOND. THE STORM
DOWNED TREES AND LARGE LIMBS ALONG THE LAKE. IT ALSO PRODUCED AN EF0
TORNADO NEAR THE FT. GORDON RECREATION AREA ON THE LAKE. ANOTHER
STRONG THUNDERSTORM BRIEFLY PRODUCED AN EF0 TORNADO NEAR RIDGEWAY IN
FAIRFIELD COUNTY. THE TORNADO DOWNED TREES ON AN OUT BUILDING AND A
CAR.

THE SYSTEM ALSO PRODUCE WIDESPREAD HEAVY RAIN ACROSS THE AREA WITH
AMOUNTS FROM 2 TO 3 INCHES COMMON. THE HEAVY RAIN PRODUCED RIVER
FLOODING ALONG THE CONGAREE RIVER AT CAROLINA EASTMAN AND ALSO AT
GADSDEN NEAR THE CONGAREE NATIONAL PARK. THE RIVER FLOODING WILL
CONTINUE INTO EARLY MAY.

HERE ARE SOME 24 HOUR RAINFALL AMOUNTS AS REPORTED ON THE MORNING OF
THE 29TH:

SC-FR-5  RIDGEWAY 2.8 NE (COCORAHS).........4.15 INCHES
LONGTOWN (LNTS1) (COOP).....................3.12 INCHES
WATER PLANT WINNSBORO (WNBS1)(COOP).........3.12 INCHES
SC-FR-1  WINNSBORO 0.1 NE (COCORAHS)........3.11 INCHES
SC-AK-16 AIKEN 8.1 SSE (COCORAHS)...........3.09 INCHES
SC-AK-14 AIKEN 7.8 SSE (COCORAHS)...........3.04 INCHES
SC-AK-44 AIKEN 9.8 NNE (COCORAHS)...........3.04 INCHES
SPRINGFIELD (SPRS1) (COOP)..................2.90 INCHES
SC-AK-39 NORTH AUGUSTA 1.5 WSW (COCORAHS)...2.85 INCHES
SAVANNAH BELOW LAKE THURMOND DAM (USGS).....2.76 INCHES

 


BELOW ARE THE HIGHEST RECORDED WIND GUSTS DURING THE MONTH:

ORANGEBURG COUNTY AIRPORT (OGB).........51 MPH ON THE 19TH
AUGUSTA DANIEL FIELD (DNL)..............43 MPH ON THE 19TH
AUGUSTA REGIONAL BUSH FIELD (AGS).......41 MPH ON THE 14TH
COLUMBIA METRO AIRPORT (CAE)............41 MPH ON THE 14TH
COLUMBIA HAMILTON-OWENS AIRPORT (CUB)...33 MPH ON THE 19TH


RECORDS TIED OR BROKEN DURING THE MONTH AT COLUMBIA:
NONE...

RECORDS TIED OR BROKEN DURING THE MONTH AT AUGUSTA:
ON THE 4TH...HIGH WAS 51 DEGREES WHICH BROKE THE RECORD LOW MAX OF
53 DEGREES SET IN 1987


.YEAR TO DATE MONTHLY TEMPERATURE AND PRECIPITATION STATISTICS...

COLUMBIA SC METROPOLITAN AIRPORT 2012 MONTHLY AVERAGE TEMPERATURES
AND DEPARTURES FROM NORMAL...

          AVG HIGH/DEP   AVG LOW/DEP   AVG TEMP   NORM  DEPARTURE
JAN 2012  61.8/+5.8      36.9/+3.2      49.4      44.8    +4.6
FEB       64.1/+3.8      40.3/+3.5      52.2      48.5    +3.7
MAR       77.7/+9.5      53.2/+10.2     65.4      55.6    +9.8
APR       79.3/+3.0      54.7/+4.3      67.0      63.4    +3.6
MAY       85.8/+2.0      64.9/+5.4      75.4      71.7    +3.7
JUN       88.4/-1.6      66.6/-1.6      77.5      79.1    -1.6
JUL       95.8/+3.1      74.2/+2.6      85.0      82.2    +2.8
AUG       89.5/-1.2      71.3/+0.3      80.4      80.8    -0.4
SEP       85.9/+0.7      65.1/+0.9      75.5      74.7    +0.8
OCT       76.6/+0.5      53.4/+1.3      65.0      64.1    +0.9     
NOV       65.5/-1.8      42.3/-3.9      52.0      54.8    -2.8
DEC       63.2/+5.0      41.9/+6.6      52.5      46.7    +5.8

2012 AVERAGE TEMPERATURE                66.5      63.9    +2.4

JAN 2013  64.0/+8.0      41.1/+7.4      52.5      44.8    +7.7
FEB       59.2/-1.1      36.2/-0.6      47.7      48.5    -0.8
MAR       63.5/-4.7      38.5/-4.5      51.0      55.6    -4.6
APR       76.7/+0.4      53.4/+3.0      65.0      63.4    +1.6

AUGUSTA GA BUSH FIELD 2012 MONTHLY AVERAGE TEMPERATURES AND
DEPARTURES FROM NORMAL...

          AVG HIGH/DEP   AVG LOW/DEP  AVG TEMP    NORM  DEPARTURE
JAN 2012  63.4/+5.5      34.3/+1.5     48.8       45.4    +3.4
FEB       65.6/+3.3      39.1/+3.2     52.4       49.1    +3.3
MAR       77.0/+7.1      51.0/+9.0     64.0       55.9    +8.1 
APR       79.4/+2.0      51.3/+3.2     65.4       62.7    +2.7
MAY       86.0/+1.0      61.6/+4.3     73.8       71.1    +2.7
JUN       87.6/-3.4      61.8/-4.4     74.7       78.6    -3.9
JUL       96.0/+2.6      71.5/+1.7     83.7       81.6    +2.1
AUG       88.6/-3.2      69.0/-0.3     78.8       80.5    -1.7
SEP       85.4/-1.3      62.2/-0.4     73.8       74.9    -0.8
OCT       77.4/-0.3      52.0/+1.0     64.7       64.4    +0.3   
NOV       65.7/-3.4      41.4/-5.3     50.9       55.2    -4.3
DEC       62.7/+2.7      39.3/+4.8     51.0       47.2    +3.8

2012 AVERAGE TEMPERATURE               65.2       63.9    +1.3

JAN 2013 65.4/+7.5       39.4/+6.6     52.4       45.4    +7.0
FEB      59.8/-2.5       35.5/-0.4     47.6       49.1    -1.5
MAR      63.8/-6.1       37.9/-4.1     50.8       55.9    -5.1
APR      76.2/-1.1       48.5/+0.4     62.4       62.7    -0.3

COLUMBIA SC METROPOLITAN AIRPORT 2012 MONTHLY PRECIPITATION...

               TOTAL   NORMAL  DEPARTURE
              (INCHES)
JAN 2012       1.76     3.58    -1.82
FEB            2.46     3.61    -1.15
MAR            2.21     3.73    -1.52
APR            2.28     2.62    -0.34
MAY            4.71     2.97    +1.74
JUN            4.18     4.69    -0.51
JUL            6.96     5.46    +1.50
AUG            9.81     5.26    +4.55
SEP            1.84     3.54    -1.70
OCT            1.42     3.17    -1.75
NOV            1.62     2.74    -1.12
DEC            3.51     3.22    +0.29

2012 TOTAL    42.76    44.59    -1.83

JAN 2013       1.21     3.58    -2.37
FEB            5.51     3.61    +1.90
MAR            3.65     3.73    -0.08
APR            4.63     2.62    +2.01


AUGUSTA GA BUSH FIELD 2012 MONTHLY PRECIPITATION...

               TOTAL   NORMAL   DEPARTURE 
              (INCHES) 
JAN 2012       1.40     3.91     -2.51
FEB            1.12     3.92     -2.80
MAR            2.28     4.18     -1.90
APR            1.45     2.84     -1.39
MAY            4.56     2.65     +1.91
JUN            2.48     4.72     -2.24
JUL            1.54     4.33     -2.79
AUG           12.28     4.32     +7.96
SEP            1.84     3.22     -1.38
OCT            1.36     3.27     -1.91
NOV            1.10     2.82     -1.72
DEC            4.67     3.39     +1.28

2012 TOTAL    36.08    43.57     -7.49

JAN 2013       0.60     3.91     -3.31
FEB            9.40     3.92     +5.48
MAR            3.11     4.18     -1.07
APR            4.23     2.84     +1.39


THE OUTLOOK FOR MAY...

THE FORECAST CALLS FOR EQUAL CHANCES OF ABOVE...BELOW OR NORMAL
TEMPERATURES FOR MAY. THIS MEANS THERE IS NO CLEAR CLIMATE SIGNAL
THAT TEMPERATURES WILL BE ABOVE...BELOW OR NEAR NORMAL. THERE IS A
33 TO 40 PERCENT CHANCE OF ABOVE NORMAL PRECIPITATION FOR MAY. THIS
MEANS THAT THERE IS A CLIMATE SIGNAL THAT PRECIPITATION MAY BE 
ABOVE NORMAL.  


.NOTE...
MUCH APPRECIATION GOES OUT TO OUR NWS COOPERATIVE WEATHER
OBSERVERS...COCORAHS (COMMUNITY...COLLABORATIVE...RAIN...HAIL AND
SNOW NETWORK) OBSERVERS...SOUTHEAST REGIONAL CLIMATE CENTER AND
LOCAL WEATHER PARTNERS FOR THE DATA THEY PROVIDE THROUGHOUT THE
YEAR. THEIR HARD WORK AND DEDICATION IS INVALUABLE.

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