Alert archive / Georgia / Special Weather Statements in 2012

Special Weather Statement, NWS Charleston, SC

July 28, 2012Long County, Georgia

NWS Charleston, SC issued this special weather statement at Jul 28, 2012, 3:28 PM EDT for Long County, Georgia. It was in force for 32 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 28, 2012, 3:28 PM EDT (19:28 UTC)
Expired: Jul 28, 2012, 4:00 PM EDT
In force: 32 min
Issued by: NWS Charleston, SC

County Long County, GA

The radar

The Charleston,SC radar (KCLX), 104 km from the middle of the area, began a volume at 19:28 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 7.5 hours before the alert went out and 161 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1585 J/kg
Mixed-layer CIN: -20 J/kg
Mixed-layer LCL: 716 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -44 m²/s²
0-3 km storm-relative helicity: -12 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Charleston, SC wrote its last area forecast discussion before this special weather statement went out at Jul 28, 2:25 PM EDT, 1 hour 3 minutes earlier.

Area forecast discussion, Jul 28, 2:25 PM EDT, 1 hour 3 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHARLESTON SC
225 PM EDT SAT JUL 28 2012

.SYNOPSIS...
A PERSISTENT TROUGH OF LOW PRESSURE WILL REMAIN INLAND THIS WEEKEND
AS A COLD FRONT APPROACHES THE REGION FROM THE NORTHWEST. THE FRONT
WILL LIKELY STALL JUST TO THE NORTH OF THE AREA BY EARLY NEXT WEEK
BEFORE DISSIPATING THROUGH THE MIDDLE OF THE WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
A POTENTIALLY ACTIVE DAY IS IN STORE GIVEN SEVERAL SYNOPTIC-SCALE
AND MESOSCALE FEATURES AT PLAY. ALOFT...THE REGION WILL BE UNDER
THE RIGHT ENTRANCE REGION OF AN 85 KT JET STREAK STRETCHING FROM
THE MID-ATLANTIC TO NEW ENGLAND...ENHANCING UPPER DIVERGENCE. AT
MID LEVELS A PRONOUNCED SHORTWAVE DISTURBANCE IS EVIDENT ON
MORNING WATER VAPOR IMAGERY AND PROGGED TO MOVE EAST TODAY. A
RIBBON OF ALTOSTRATUS ASSOCIATED WITH THE LEADING EDGE OF THE
SHORTWAVE IS MOVING ACROSS CENTRAL GA/SC AT THIS TIME. AS IT
SLOWLY PUSHES INTO OUR WESTERN ZONES THROUGH EARLY AFTERNOON WE
MAY SEE SOME DIFFERENTIAL HEATING BOUNDARIES FORM.

MODIFIED 12Z SOUNDINGS FROM CHS AND JAX SHOW QUITE A BIT OF MID-
LEVEL DRY AIR WITH DOWNDRAFT CAPES EXCEEDING 1300 J/KG. HOWEVER
THIS IS LIKELY DECEIVING BECAUSE THERE WILL BE SOME MOISTENING
THROUGH THE DAY AS THE SHORTWAVE APPROACHES. NAM MODEL SOUNDINGS
SHOW DCAPE VALUES DROPPING BELOW 700 J/KG BY 20Z. LOW-LEVEL
MOISTURE PROFILES ARE QUITE GOOD TODAY AND CONVECTIVE TEMPS ARE IN
THE LOWER 90S. INITIAL CONVECTION WILL START POPPING BY EARLY
AFTERNOON WITH INCREASING COVERAGE AS MANY DIFFERENT FEATURES
BEGIN TO INTERACT. THE SEABREEZE WILL ALSO AID IN CONVECTIVE
POTENTIAL LATER THIS AFTERNOON. NO CHANGES TO CURRENT POP GRIDS AS
THESE STILL LOOK GOOD. SEVERE WEATHER POTENTIAL IS DIFFICULT TO
PIN DOWN UNTIL WE START SEEING SOME TRENDS IN THE REAL-TIME
MESOANALYSIS DATA AND QUANTIFY THE AMOUNT OF MID-LEVEL DRY AIR
AVAILABLE FOR DOWNDRAFTS. HOWEVER...THE FACT THAT WE COULD SEE A
BIT MORE CONVECTIVE ORGANIZATION INDICATES A SLIGHTLY GREATER
CHANCE FOR DAMAGING WIND GUSTS WITH SOME STORMS.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH TUESDAY/...
SCATTERED CONVECTION SHOULD GRADUALLY DIMINISH AFTER A LATE AFTERNOON
PEAK...HOWEVER TSTMS COULD CONTINUE TO BUILD INTO ANY UNTAPPED
INLAND REGIONS OF SE GEORGIA OR SOUTH CAROLINA THIS EVENING. REMNANT
LIGHTER RAINS FROM DISSIPATING CUMULONIMBI SHOULD ALSO DECREASE IN
COVERAGE LATER THIS EVENING. OVERNIGHT A FEW SHOWERS AND TSTMS
REMAIN POSSIBLE JUST ABOUT ANYWHERE BUT CONTINUED TREND OF A
DIURNAL DECREASE OVER LAND AREAS WITH TIME. LOWS WILL BE IN THE
70S WITH SOME LATE NIGHT CLEARING PROBABLE.

SUNDAY AND SUNDAY NIGHT...THE UPPER TROUGH WILL CONTINUE TO BECOME
MORE PRONOUNCED ACROSS THE EASTERN UNITED STATES WHILE AT THE
SURFACE...AN INLAND TROUGH REMAINS ACROSS THE CENTRAL CAROLINAS.
MODEL SOUNDINGS SHOW SUFFICIENT MOISTURE WITH PWATS NEAR 2 INCHES AND
MODERATE INSTABILITY ACROSS THE AREA. THIS COMBINATION SHOULD ALLOW
AT LEAST ISOLATED TO SCATTERED CONVECTION DEVELOPMENT ALONG THE SEA
BREEZE BY MIDDAY...WHILE ADDITIONAL DEVELOPMENT WILL IGNITE ACROSS
INLAND SC CLOSER TO THE INLAND TROUGH. BY LATER IN THE
AFTERNOON...EXPECT CONVECTION/BOUNDARY INTERACTION TO RESULT IN
ADDITIONAL DEVELOPMENT WHICH WILL LIKELY TRANSITION BACK ACROSS
SOUTHEAST GEORGIA. CAN NOT RULE OUT A FEW STRONG TO SEVERE STORMS AS
CONVECTION WILL LIKELY EXHIBIT TYPICAL SUMMERTIME PULSE BEHAVIOR.
GENERALLY...EXPECT HIGH TEMPERATURES TO TOP OUT IN THE LOW TO MID
90S INLAND WITH NEAR 90 DEGREES EXPECTED ALONG THE BEACHES. LOW
TEMPERATURES WILL BOTTOM OUT IN THE LOW TO MID 70S AWAY FROM THE
COAST.

MONDAY THROUGH TUESDAY...THE UPPER TROUGH WILL CONTINUE TO MAINTAIN
CONTROL OVER THE EASTERN COAST WHILE ITS ASSOCIATED COLD FRONT
STALLS JUST NORTHWEST OF THE AREA. WITH THE FRONT IN THE VICINITY OF
THE CWA...AMPLE MOISTURE AND A PROGRESSIVE SEA BREEZE...EXPECT AT
LEAST ISOLATED TO SCATTERED CONVECTION DURING BOTH AFTERNOONS. HIGH
TEMPERATURES WILL BE NEAR SEASONAL NORMALS WITH LOW TO MID 90S
EXPECTED AWAY FROM THE COAST. LOW TEMPERATURES WILL DIP INTO THE LOW
70S INLAND AND REMAIN IN THE MID 70S CLOSER TO THE BEACHES.

&&

.LONG TERM /TUESDAY NIGHT THROUGH FRIDAY/...
THE BROAD UPPER TROUGH WILL REMAIN IN PLACE ACROSS THE EASTERN
UNITED STATES THROUGH MUCH OF THE EXTENDED PERIOD. IT REMAINS
DIFFICULT TO DECIPHER ONE DAY TO THE NEXT AS MODELS SHOW SEVERAL
SHORTWAVE DISTURBANCES AFFECTING THE AREA. OVERALL...EXPECT AT LEAST
ISOLATED TO SCATTERED CONVECTION...TYPICALLY DURING THE USUAL
AFTERNOON HOURS...WHILE TEMPERATURES WILL REMAIN NEAR SEASONAL
NORMALS. BY THE END OF THE PERIOD...MODELS SHOW A MORE ZONAL FLOW
ALOFT DEVELOPING AS THE UPPER TROUGH BEGINS TO DISSIPATE AND THE
RIDGE ACROSS THE MIDDLE OF THE UNITED STATES STRENGTHEN.

&&

.AVIATION /18Z SATURDAY THROUGH THURSDAY/...
WE MAINTAINED VCTS AT BOTH TERMINALS UNTIL 22Z DUE TO SEVERAL
FACTORS COMBINING TO INCREASE COVERAGE OF TSTMS THIS AFTERNOON.
INITIATION IS A BIT SLOWER TODAY BUT COVERAGE SHOULD INCREASE BY
LATE AFTERNOON. WITHOUT MUCH ON RADAR AS OF YET...COULD NOT PIN
DOWN TIMING WITH A TEMPO GROUP IN 18Z TAFS. ACTIVITY SHOULD WANE
AFTER SUNSET WITH VFR CONDITIONS THE REMAINDER OF THE PERIOD.

EXTENDED AVIATION OUTLOOK...PRIMARILY VFR EXCEPT FOR SHORT-LIVED
RESTRICTIONS POSSIBLE IN MAINLY AFTERNOON/EVENING SHOWERS AND
THUNDERSTORMS.

&&

.MARINE...
ATLANTIC HIGH PRESSURE WILL PREVAIL AS A TROUGH OF LOW PRESSURE
LINGERS INLAND THROUGH THE MIDDLE OF NEXT WEEK. THIS PATTERN WILL
MAINTAIN A SOUTH TO SOUTHWEST FLOW ACROSS THE WATERS. WINDS COULD
REACH UPWARDS OF 15-20 KT AT TIMES...ESPECIALLY WITH NOCTURNAL
SURGING. HOWEVER...WINDS AND SEAS ARE EXPECTED TO REMAIN BELOW SMALL
CRAFT ADVISORY CRITERIA IN THE 2-4 FT RANGE THROUGH THE FORECAST
PERIOD.

&&

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

&&

SYNOPSIS...
NEAR TERM...JRL
SHORT TERM...JHP
LONG TERM...JHP
AVIATION...JRL
MARINE...

Hazardous weather outlook, Jul 28, 10:24 AM EDT, 5 hours 4 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHARLESTON SC
1024 AM EDT SAT JUL 28 2012

AMZ330-350-352-354-374-291430-
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-
1024 AM EDT SAT JUL 28 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS.

.DAY ONE...TODAY AND TONIGHT.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

GAZ087-088-099>101-114>119-137>141-SCZ040-042>045-047>052-291430-
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-
1024 AM EDT SAT JUL 28 2012

...SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST GEORGIA AND
SOUTHEAST SOUTH CAROLINA.

.DAY ONE...TODAY AND TONIGHT.

SEVERE THUNDERSTORMS...SCATTERED THUNDERSTORMS ARE EXPECTED TO
DEVELOP ACROSS SOUTHEAST GEORGIA AND SOUTHERN SOUTH CAROLINA THIS
AFTERNOON AND CONTINUE INTO THE EARLY EVENING HOURS. A FEW OF THE
STORMS COULD BECOME SEVERE WITH THE MAIN THREAT BEING DAMAGING
STRAIGHT LINE WINDS AND DEADLY CLOUD TO GROUND LIGHTNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

PLEASE RELAY ANY REPORTS OF HAZARDOUS WEATHER INCLUDING...BUT NOT
LIMITED TO LARGE HAIL...DAMAGING WINDS...AND FLOODING TO THE
NATIONAL WEATHER SERVICE IN CHARLESTON AT 1-888-383-2024.

In the hours before

Special weather statement, Jul 28, 3:18 PM EDT, 10 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
318 PM EDT SAT JUL 28 2012

SCZ045-050-281945-
CHARLESTON-INLAND BERKELEY-
318 PM EDT SAT JUL 28 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF CHARLESTON AND
BERKELEY COUNTIES THROUGH 345 PM EDT...

AT 314 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS...EXTENDING FROM GERMANTOWN TO SMITH...MOVING
NORTHEAST AT 5 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
AWENDAW AND HAMPTON PLANTATION STATE PARK...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...
PENNY SIZE HAIL...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FREQUENT LIGHTNING IS OCCURRING WITH THESE THUNDERSTORMS. IF
OUTDOORS...STAY AWAY FROM ISOLATED TALL OBJECTS. IF INDOORS...STAY
AWAY FROM WINDOWS AND DOORS. AVOID USING PLUMBING AND ELECTRICAL
APPLIANCES UNLESS IT IS AN EMERGENCY.

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.

&&

LAT...LON 3299 7967 3306 7980 3326 7955 3325 7951
      3324 7950 3325 7949 3321 7941 3319 7940
      3318 7940
TIME...MOT...LOC 1918Z 034DEG 5KT 3320 7950 3304 7972

JAQ

Special weather statement, Jul 28, 3:28 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHARLESTON SC
328 PM EDT SAT JUL 28 2012

GAZ114-137-138-282000-
INLAND LIBERTY-LONG-TATTNALL-
328 PM EDT SAT JUL 28 2012

...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF TATTNALL...LIBERTY
AND LONG COUNTIES THROUGH 400 PM EDT...

AT 328 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM...NEAR GLENNVILLE...MOVING EAST AT 10 MPH.

SOME LOCATIONS THAT WILL BE AFFECTED INCLUDE...
GLENNVILLE...GUM BRANCH...MENDES AND MIDWAY...

PREPARE NOW FOR THE FOLLOWING HAZARDS...
GUSTY WINDS OF 40 TO 50 MPH...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ALERT FOR RAPIDLY CHANGING WEATHER CONDITIONS AS STORMS APPROACH.
BE READY TO TAKE IMMEDIATE ACTION IN CASE A SEVERE THUNDERSTORM
WARNING IS ISSUED FOR YOUR LOCATION.

&&

LAT...LON 3201 8161 3180 8162 3187 8199 3205 8200
TIME...MOT...LOC 1929Z 277DEG 9KT 3195 8190

The office that day

Everything else NWS Charleston, SC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 28, 3:32 PM EDT	Special Weather Statement	CHS	Bryan	28 min
Jul 28, 3:59 PM EDT	Special Weather Statement	CHS	Bryan, Chatham, Liberty	31 min
Jul 28, 4:15 PM EDT	Special Marine Warning	CHS		60 min
Jul 28, 4:18 PM EDT	Special Marine Warning	CHS		87 min
Jul 28, 4:41 PM EDT	Special Weather Statement	CHS	Chatham, Liberty	34 min
Jul 28, 5:01 PM EDT	Areal Flood Advisory	CHS	Chatham	59 min
Jul 28, 5:05 PM EDT	Severe Thunderstorm Warning	CHS	Bryan, Chatham, Liberty	55 min
Jul 28, 5:10 PM EDT	Special Marine Warning	CHS		95 min
Jul 28, 5:16 PM EDT	Special Weather Statement	CHS	Long, McIntosh	59 min
Jul 28, 5:24 PM EDT	Severe Thunderstorm Warning	CHS	Liberty, Long, McIntosh	66 min
Jul 28, 5:42 PM EDT	Special Marine Warning	CHS		2 hr
Jul 28, 5:42 PM EDT	Special Weather Statement	CHS	Chatham	33 min
Jul 28, 6:30 PM EDT	Severe Thunderstorm Warning	CHS	Liberty, McIntosh	60 min
Jul 28, 6:38 PM EDT	Special Marine Warning	CHS		103 min
Jul 28, 7:44 PM EDT	Special Marine Warning	CHS		2 hr
Jul 27, 10:44 PM EDT	Special Weather Statement	CHS	Beaufort	31 min
Jul 28, 3:18 PM EDT	Special Weather Statement	CHS	Berkeley	27 min
Jul 28, 3:41 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	64 min
Jul 28, 3:50 PM EDT	Special Weather Statement	CHS	Berkeley	25 min
Jul 28, 3:53 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	67 min
Jul 28, 4:48 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	87 min
Jul 28, 4:52 PM EDT	Special Weather Statement	CHS	Charleston	53 min
Jul 28, 5:18 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	57 min
Jul 28, 5:29 PM EDT	Severe Thunderstorm Warning	CHS	Beaufort, Jasper	49 min
Jul 28, 5:39 PM EDT	Special Weather Statement	CHS	Charleston	66 min
Jul 28, 6:00 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley, Charleston	60 min
Jul 28, 6:13 PM EDT	Areal Flood Advisory	CHS	Berkeley, Charleston	92 min
Jul 28, 7:03 PM EDT	Special Weather Statement	CHS	Berkeley, Charleston	42 min
Jul 28, 7:19 PM EDT	Severe Thunderstorm Warning	CHS	Berkeley	56 min
Jul 28, 7:35 PM EDT	Special Weather Statement	CHS	Charleston	25 min

Nearby

Special Weather Statements in Georgia, 2012 Every special weather statement in 2012

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.