Alert archive / Georgia / Special Weather Statements in 2014

Special Weather Statement, NWS Atlanta, GA

September 4, 2014Chattahoochee County, Muscogee County, Georgia

NWS Atlanta, GA issued this special weather statement at Sep 4, 2014, 7:13 PM EDT for Chattahoochee County, Muscogee County, Georgia. It was in force for 47 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: Sep 4, 2014, 7:13 PM EDT (23:13 UTC)
Expired: Sep 4, 2014, 8:00 PM EDT
In force: 47 min
Issued by: NWS Atlanta, GA

Counties Chattahoochee County, GA, Muscogee County, GA

The radar

The Maxwell AFB radar (KMXX), 82 km from the middle of the area, began a volume at 23:16 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 11.2 hours before the alert went out and 114 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: 167 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 571 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 8 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.

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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 Atlanta, GA wrote its last area forecast discussion before this special weather statement went out at Sep 4, 3:33 PM EDT, 3 hours 40 minutes earlier.

Area forecast discussion, Sep 4, 3:33 PM EDT, 3 hours 40 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
333 PM EDT THU SEP 4 2014

.SHORT TERM /TONIGHT THROUGH FRIDAY NIGHT/...
VORT MAX THAT HELPED INCREASE CONVECTION YESTERDAY...HAS SPLIT WITH
A PORTION MOVING NE OF THE AREA AND ANOTHER RETROGRADING TO THE
WEST. STILL EXPECT SCATTERED CONVECTION THROUGH THIS EVENING...BUT
AGAIN SHOULD SEE A DECREASE IN ACTIVITY OVERNIGHT. REMAIN ON THE
WESTERN EDGE OF THE ATLANTIC RIDGE AND DEEP...TROPICAL MOISTURE WILL
REMAIN IN PLACE THROUGH THE SHORT TERM. RESULT IS DIURNAL CONVECTION
IN THE AFTERNOON INTO THE FIRST HALF OF THE NIGHT. WITH ANY SLOW
MOVING STORMS...FLASH FLOODING IS STILL POSSIBLE. WITH INSTABILITY
AROUND 2000 J/KG...ALSO A FEW STRONG TO SEVERE STORMS REMAIN
POSSIBLE WITH THE MAIN THREAT BEING DAMAGING WIND.

WITH CLOUDS EXPECTED...CONTINUED TO GO ON THE HIGHER SIDE OF
GUIDANCE FOR OVERNIGHT LOWS. STILL CONSIDERABLE DIFFERENCE IN MAX
TEMP GUIDANCE FOR TOMORROW AND FORECAST MAX TEMPS ARE NEAR A BLEND.

11

.LONG TERM /SATURDAY THROUGH THURSDAY/...
MEDIUM RANGE MODELS REMAIN CONSISTENT WITH RECENT PREVIOUS RUNS
SHOWING A GENERAL WEAKENING OF THE UPPER RIDGE RESULTING IN A FAIRLY
FLAT UPPER-LEVEL PATTERN THROUGH THE PERIOD. MOISTURE ALSO REMAINS
ABUNDANT THROUGH THE FORECAST. CURRENT LONG TERM FORECAST GRIDS
REFLECT THIS WELL AND MINIMAL CHANGES WERE MADE AT THIS TIME. PLEASE
SEE THE PREVIOUS LONG TERM FORECAST DISCUSSION BELOW.

20

PREVIOUS LONG TERM DISCUSSION /FRIDAY NIGHT THROUGH WEDNESDAY/...

MOIST ATMOSPHERE REMAINS IN PLACE AT THE START OF THE PERIOD.
UPPER TROUGH DEEPENS INTO THE NORTHEAST STATES LATE SATURDAY INTO
SUNDAY AND LOOKS LIKE A FRONTAL BOUNDARY GETS PUSHED INTO NORTH
GA. HOWEVER...A MOIST AIR MASS CONTINUES ACROSS THE FORECAST AREA
EVEN WITH THE FRONTAL BOUNDARY. HIGH PRESSURE THEN PUSHES INTO
NORTH GA...SETTING UP A WEDGE INTO THE FIRST OF THE WEEK. IN
GENERAL HAVE KEPT MOSTLY CHANCE POPS ACROSS NORTH AND CENTRAL GA
THROUGH THE PERIOD. HAVE KEPT POPS A BIT HIGHER...GOOD
CHANCE...FOR SUNDAY INTO MONDAY VICINITY OF BACKDOOR FRONT AND AN
INCREASE IN ATLANTIC MOISTURE. TEMPERATURES NOT AS WARM AFTER THE
WEEKEND WITH WEAKENING OF THE UPPER RIDGE AND INCREASING LOWER
LEVEL EASTERLY FLOW.

41

&&

AVIATION...
18Z UPDATE...
BIGGEST CHALLENGE AGAIN TODAY IS TIMING OF CONVECTION AT THE TAF
SITES. HAVE ALREADY SEEN DEVELOPMENT AFFECT ATL AND AHN. THINK
STORMS WILL CONTINUE INTO EARLY EVENING...THEN CHANCES WILL BEGIN
TO DECREASE. WITH PRECIPITATION TODAY...EXPECT LOW STRATUS TO
OCCUR AT MOST SITES AGAIN TOMORROW MORNING. LEAST CONFIDENT ON THE
STRATUS AT MCN AND CSG.

//ATL CONFIDENCE...18Z UPDATE...
MEDIUM CONFIDENCE ON ALL ELEMENTS DUE TO THUNDERSTORMS IMPACTING
VSBY...WIND AND CIGS.

11

&&

.PRELIMINARY POINT TEMPS/POPS...
ATHENS          69  90  70  90 /  40  30  30  40
ATLANTA         72  88  72  89 /  50  40  30  40
BLAIRSVILLE     66  81  66  84 /  40  40  40  40
CARTERSVILLE    69  88  69  89 /  40  40  30  40
COLUMBUS        71  91  73  92 /  50  30  30  40
GAINESVILLE     70  86  70  88 /  40  40  30  40
MACON           70  90  70  92 /  40  50  20  40
ROME            69  89  69  89 /  40  40  30  40
PEACHTREE CITY  69  87  68  89 /  50  40  30  40
VIDALIA         73  91  73  90 /  30  50  40  50

&&

.FFC WATCHES/WARNINGS/ADVISORIES...
NONE.
&&

SHORT TERM...11
LONG TERM....20
AVIATION...11

Hazardous weather outlook, Sep 4, 4:39 AM EDT, 14 hours 34 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
439 AM EDT THU SEP 4 2014

GAZ001>009-011>016-019>025-027-030>039-041>062-066>076-078>086-
089>098-102>113-050845-
BALDWIN-BANKS-BARROW-BARTOW-BIBB-BLECKLEY-BUTTS-CARROLL-CATOOSA-
CHATTAHOOCHEE-CHATTOOGA-CHEROKEE-CLARKE-CLAYTON-COBB-COWETA-
CRAWFORD-CRISP-DADE-DAWSON-DEKALB-DODGE-DOOLY-DOUGLAS-EMANUEL-
FANNIN-FAYETTE-FLOYD-FORSYTH-GILMER-GLASCOCK-GORDON-GREENE-
GWINNETT-HALL-HANCOCK-HARALSON-HARRIS-HEARD-HENRY-HOUSTON-JACKSON-
JASPER-JEFFERSON-JOHNSON-JONES-LAMAR-LAURENS-LUMPKIN-MACON-
MADISON-MARION-MERIWETHER-MONROE-MONTGOMERY-MORGAN-MURRAY-
MUSCOGEE-NEWTON-NORTH FULTON-OCONEE-OGLETHORPE-PAULDING-PEACH-
PICKENS-PIKE-POLK-PULASKI-PUTNAM-ROCKDALE-SCHLEY-SOUTH FULTON-
SPALDING-STEWART-SUMTER-TALBOT-TALIAFERRO-TAYLOR-TELFAIR-TOOMBS-
TOWNS-TREUTLEN-TROUP-TWIGGS-UNION-UPSON-WALKER-WALTON-WARREN-
WASHINGTON-WEBSTER-WHEELER-WHITE-WHITFIELD-WILCOX-WILKES-
WILKINSON-
439 AM EDT THU SEP 4 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH AND CENTRAL GEORGIA.

.DAY ONE...TODAY AND TONIGHT...

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED AGAIN TODAY INTO
TONIGHT.

LOCALIZED FLASH FLOODING WITH SLOW MOVING OR TRAINING
STORMS AND SOME ENHANCED DOWNBURST WINDS ARE POSSIBLE AND CANNOT
RULE OUT ISOLATED SEVERE DEVELOPMENT THIS AFTERNOON INTO EVENING.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH THE
PERIOD...MAINLY IN THE AFTERNOON AND EVENING. SOME OF THE STORMS
COULD BE STRONG WITH GUSTY WINDS AND LOCALLY HEAVY DOWNPOURS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED THROUGH TONIGHT.

In the hours before

Local storm report, Sep 4, 2:45 PM EDT, 4 hours 28 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
245 PM EDT THU SEP 04 2014

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

0620 PM     LIGHTNING        3 W BUFORD DAM-LAKE LAN 34.15N  84.12W
09/03/2014                   FORSYTH            GA   EMERGENCY MNGR

            LIGHTNING STRUCK 10 INDIVIDUAL RESIDENCES RESULTING IN
            4 STRUCTURE FIRES.

&&

EVENT NUMBER FFC1400874

20

Local storm report, Sep 4, 2:47 PM EDT, 4 hours 26 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
247 PM EDT THU SEP 04 2014

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

0625 PM     TSTM WND DMG     3 W BUFORD DAM-LAKE LAN 34.15N  84.12W
09/03/2014                   FORSYTH            GA   EMERGENCY MNGR

            2 TREES BLOWN DOWN RESULTING IN DOWNED POWER LINES.

&&

EVENT NUMBER FFC1400875

20

Special weather statement, Sep 4, 5:18 PM EDT, 1 hour 55 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
518 PM EDT THU SEP 4 2014

GAZ057-042200-
518 PM EDT THU SEP 4 2014

...SIGNIFICANT WEATHER ADVISORY FOR 40 MPH WINDS IN HENRY COUNTY
UNTIL 600 PM EDT...

AT 515 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER MCDONOUGH...MOVING NORTHWEST AT 10 MPH.

THIS STORM HAS THE POTENTIAL TO PRODUCE SIZED HAIL...FREQUENT CLOUD
TO GROUND LIGHTNING AND WIND GUSTS TO 40 MPH AS IT MOVES ACROSS HENRY
COUNTY THROUGH 600 PM EDT. SOME LOCATIONS IN THE PATH OF THIS STORM
INCLUDE BLACKSVILLE...OLA...MCDONOUGH...FLIPPEN...KELLEYTOWN...EAGLES
LANDING AND STOCKBRIDGE. HEAVY DOWNPOURS WILL CAUSE PONDING OF WATER
ON ROADWAYS.

&&

LAT...LON 3355 8426 3358 8426 3364 8418 3356 8413
      3357 8411 3355 8408 3346 8401 3336 8411
      3349 8428 3353 8428 3355 8429
TIME...MOT...LOC 2118Z 138DEG 10KT 3348 8412

Special weather statement, Sep 4, 5:36 PM EDT, 1 hour 37 minutes before

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Special weather statement, Sep 4, 5:45 PM EDT, 1 hour 28 minutes before

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Special weather statement, Sep 4, 7:13 PM EDT, 0 minutes before

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The office that day

Everything else NWS Atlanta, GA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Sep 3, 8:22 PM EDT	Special Weather Statement	FFC	Wilkinson	38 min
Sep 3, 8:59 PM EDT	Special Weather Statement	FFC	Wilkinson	61 min
Sep 3, 9:03 PM EDT	Special Weather Statement	FFC	Dawson	57 min
Sep 3, 10:03 PM EDT	Special Weather Statement	FFC	DeKalb	42 min
Sep 3, 10:11 PM EDT	Special Weather Statement	FFC	Warren	49 min
Sep 4, 2:20 PM EDT	Special Weather Statement	FFC	Crawford	25 min
Sep 4, 5:18 PM EDT	Special Weather Statement	FFC	Henry	42 min
Sep 4, 5:32 PM EDT	Severe Thunderstorm Warning	FFC	Henry, Rockdale	28 min
Sep 4, 5:36 PM EDT	Special Weather Statement	FFC	Webster	39 min
Sep 4, 5:45 PM EDT	Special Weather Statement	FFC	Rockdale	30 min
Sep 4, 7:44 PM EDT	Special Weather Statement	FFC	Muscogee	46 min

Nearby

Special Weather Statements in Georgia, 2014 Every special weather statement in 2014

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.