Alert archive / Georgia / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 154, NWS Tallahassee, FL

June 18, 2015Worth County, Georgia

NWS Tallahassee, FL issued this severe thunderstorm warning at Jun 18, 2015, 6:42 PM EDT for Worth County, Georgia. It was in force for 27 min. 4 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 18, 2015, 6:42 PM EDT (22:42 UTC)
Expired: Jun 18, 2015, 7:09 PM EDT
In force: 27 min
Issued by: NWS Tallahassee, FL
Area: Storm-based polygon

County Worth County, GA

The radar

The Moody AFB radar (KVAX), 106 km from the middle of the area, began a volume at 22:44 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.

What was reported inside it

Time	Report	Where	Remark
Jun 18, 6:45 PM EDT	TSTM WND DMG	5 S Poulan, GA	TREE DOWN ON WRIGHTS CHAPEL ROAD
Jun 18, 6:48 PM EDT	TSTM WND DMG	3 S Poulan, GA	TREE DOWN NEAR WARRIOR CREEK
Jun 18, 6:50 PM EDT	TSTM WND DMG	2 S Poulan, GA	TREE DOWN ON HIGHWAY 256 SOUTH OF POULAN
Jun 18, 7:03 PM EDT	TSTM WND DMG	5 N Ty Ty, GA	TREE DOWN ON LITTLE RIVER ROAD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 4 storm reports to this severe thunderstorm warning; the first came 3 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 10.7 hours before the alert went out and 134 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: 817 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1252 m above ground
0-6 km bulk shear: 11 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 50 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.

915 
WUUS52 KTAE 182242
SVRTAE
GAC321-182330-
/O.NEW.KTAE.SV.W.0154.150618T2242Z-150618T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TALLAHASSEE FL
642 PM EDT THU JUN 18 2015

THE NATIONAL WEATHER SERVICE IN TALLAHASSEE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  WORTH COUNTY IN SOUTH CENTRAL GEORGIA...

* UNTIL 730 PM EDT

* AT 642 PM EDT...THE NATIONAL WEATHER SERVICE HAS DETECTED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60
  MPH. THIS STORM WAS LOCATED NEAR POULAN...OR NEAR SYLVESTER...AND
  MOVING NORTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  SYLVESTER...POULAN...MARINE CORPS LOGISTICS BASE...TERRELL...
  SUMNER...ISABELLA...CRESTWOOD...SYLVESTER AIRPORT...GAMMAGE...RED
  ROCK...ACREE...GORDY...SHINGLER...TEMPY...PARKERVILLE...ALFORDS AND
  POWELLTOWN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE IMMEDIATELY INSIDE A STRONG BUILDING AND AWAY FROM WINDOWS UNTIL
THIS STORM PASSES.

&&

LAT...LON 3165 8379 3162 8379 3162 8374 3159 8367
      3157 8366 3157 8365 3149 8365 3148 8367
      3143 8366 3134 8378 3145 8400 3146 8400
      3146 8398 3148 8398 3148 8400 3158 8400
      3171 8394
TIME...MOT...LOC 2242Z 218DEG 9KT 3146 8381 

$$

42-DVD

2 follow-up statements

011 
WWUS52 KTAE 182258
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
658 PM EDT THU JUN 18 2015

GAC321-182330-
/O.CON.KTAE.SV.W.0154.000000T0000Z-150618T2330Z/
WORTH GA-
658 PM EDT THU JUN 18 2015

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 730 PM EDT
FOR CENTRAL WORTH COUNTY...

AT 658 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED OVER POULAN...OR OVER SYLVESTER...MOVING NORTH AT 10 MPH.

LOCATIONS IMPACTED INCLUDE...
SYLVESTER...POULAN...TERRELL...SUMNER...SHINGLER...TEMPY...
ISABELLA...SYLVESTER AIRPORT...GAMMAGE...RED ROCK AND GORDY.

LAT...LON 3165 8379 3162 8379 3162 8374 3159 8367
      3157 8366 3157 8365 3149 8365 3148 8367
      3143 8366 3143 8378 3150 8395 3158 8400
      3171 8394
TIME...MOT...LOC 2258Z 202DEG 10KT 3151 8380 

$$

42-DVD

620 
WWUS52 KTAE 182309
SVSTAE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
709 PM EDT THU JUN 18 2015

GAC321-182319-
/O.CAN.KTAE.SV.W.0154.000000T0000Z-150618T2330Z/
WORTH GA-
709 PM EDT THU JUN 18 2015

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL WORTH COUNTY IS
CANCELLED...
                
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
THEREFORE THE WARNING HAS BEEN CANCELLED.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
TALLAHASSEE.

LAT...LON 3165 8379 3162 8379 3162 8374 3159 8367
      3157 8366 3157 8365 3149 8365 3148 8367
      3143 8366 3143 8378 3150 8395 3158 8400
      3171 8394
TIME...MOT...LOC 2307Z 218DEG 9KT 3153 8378 

$$

42-DVD

What forecasters said that day

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

NWS Tallahassee, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 18, 3:34 PM EDT, 3 hours 8 minutes earlier.

Area forecast discussion, Jun 18, 3:34 PM EDT, 3 hours 8 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TALLAHASSEE FL
334 PM EDT THU JUN 18 2015

.NEAR TERM [THROUGH TONIGHT]...

STACKED HIGH PRESSURE HAS SHIFTED EASTWARD, ALLOWING LOW LEVEL
WINDS TO SHIFT TO THE SOUTHWEST. LOCAL RADAR IMAGERY SHOWS
THUNDERSTORMS BEGINNING TO DEVELOP ACROSS NORTH FLORIDA.
THUNDERSTORMS WILL CONTINUE TO FILL IN OVER SOUTHEAST ALABAMA AND
SOUTHWEST GEORGIA LATER IN THE AFTERNOON. BY THE EARLY EVENING
HOURS, WE MAY ALSO SEE SOME STORMS FROM THE EAST COAST SEA-BREEZE
ENTER OUR EASTERN ZONES.

TEMPERATURES WILL BE QUITE HIGH TODAY, PEAKING IN THE UPPER 90S,
LOW-MID 90S CLOSER TO THE COAST. THESE HIGH TEMPERATURES WILL
MEAN MORE UNSTABLE AIR OVER LAND AND COULD ALLOW SOME OF THE
THUNDERSTORMS THAT FORM THIS AFTERNOON TO BECOME SEVERE. THE MAIN
THREAT WITH THE STORMS TODAY WILL BE DAMAGING WIND GUSTS AND SMALL
HAIL. OVERNIGHT, LOWS WILL DIP INTO THE LOW TO MID 70S.

.SHORT TERM [FRIDAY THROUGH SATURDAY NIGHT]...

RATHER HOT CONDITIONS WILL CONTINUE THROUGH THE SHORT TERM WITH
HIGH PRESSURE THE DOMINANT FEATURE. TEMPERATURES ARE EXPECTED TO
AVERAGE AROUND 5 DEGREES ABOVE NORMAL WITH MID 90S FOR HIGHS AND
LOW TO MID 70S FOR LOWS. POPS ARE EXPECTED TO BE LIMITED TO THE
20-30% RANGE WITH THE PRESENCE OF SOME MID-LEVEL DRY AIR AND THE
RIDGE ALONG WITH THE LACK OF A CLEAR LIFTING MECHANISM OTHER THAN
THE AFTERNOON SEA BREEZE.

.LONG TERM [SUNDAY THROUGH THURSDAY]...

THE HOT SUMMER PATTERN WILL CONTINUE FOR THE LONG TERM PERIOD.
ANOTHER RIDGE OVER THE WESTERN US WILL MOVE EAST THROUGH EARLY
NEXT WEEK. POPS WILL BE TYPICAL OF SUMMER SEA BREEZE CONVECTION,
AROUND 30 PERCENT. HIGH PRESSURE AT THE SURFACE WILL KEEP
TEMPERATURES HOT, WITH HIGHS IN THE UPPER 90S AND LOWS IN THE MID
TO UPPER 70S.

&&

.AVIATION...

[THROUGH 18Z FRIDAY] SCATTERED THUNDERSTORMS WILL DEVELOP ACROSS
NORTH FLORIDA THIS AFTERNOON AND MOVE NORTH, FILLING IN OVER
SOUTHEAST ALABAMA AND SOUTHWEST GEORGIA, SO KEPT VCTS AT ALL
TERMINALS EXCEPT ECP. SOME OF THE GUIDANCE IS SUGGESTING THE
POSSIBILITY OF MVFR VSBYS LATE TONIGHT. THE GFS SHOWS IT OVER MOST
OF OUR LOCAL TERMINALS, WHILE LOCAL HI-RES GUIDANCE ONLY SHOWS
IT DEVELOPING NEAR ECP/DHN, AND SREF DOESN'T SHOW ANY AT ALL.
BECAUSE OF THE LOW CONFIDENCE, LEFT BR OUT OF THIS TAF ISSUANCE.

&&

.MARINE...

HIGH PRESSURE SOUTH OF THE OFFSHORE WATERS WILL KEEP WINDS AROUND
10 KNOTS FROM THE WEST OR SOUTHWEST THROUGH THE PERIOD. SEAS WILL
BE AROUND 1 TO 2 FEET.

&&

.FIRE WEATHER...

FAIRLY TYPICAL SUMMERTIME CONDITIONS ARE EXPECTED FOR THE NEXT
SEVERAL DAYS WITH NO RED FLAG CONCERNS.

&&

.HYDROLOGY...

OUR TYPICAL SUMMERTIME PATTERN OF SCATTERED AFTERNOON AND EVENING
THUNDERSTORMS WILL CONTINUE FOR THE NEXT WEEK WITH CHANCES FOR RAIN
DAILY. HOWEVER COVERAGE WILL REMAIN SCATTERED AND THEREFORE WILL
NOT CAUSE WIDESPREAD FLOODING.

&&

.PRELIMINARY POINT TEMPS/POPS...

TALLAHASSEE   74  97  74  97  74 /  10  20  10  20  10
PANAMA CITY   78  88  77  87  78 /  10  10  10  10  10
DOTHAN        74  95  74  95  73 /  20  20  10  20  10
ALBANY        74  97  74  97  74 /  30  20  10  20  10
VALDOSTA      75  98  72  96  73 /  30  20  10  30  10
CROSS CITY    75  95  73  95  74 /  20  30  10  40  20
APALACHICOLA  76  91  76  91  77 /  10  10  10  10  10

&&

.TAE WATCHES/WARNINGS/ADVISORIES...
FL...HIGH RIP CURRENT RISK UNTIL 9 PM EDT THIS EVENING FOR COASTAL
     BAY.

GA...NONE.
AL...NONE.
GM...NONE.
&&

NEAR TERM...MOORE
SHORT TERM...DVD
LONG TERM...WESTON
AVIATION...MOORE
MARINE...WESTON
FIRE WEATHER...DVD
HYDROLOGY...MOORE

In the hours before

Local storm report, Jun 18, 4:51 PM EDT, 1 hour 51 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TALLAHASSEE FL
451 PM EDT THU JUN 18 2015

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

0423 PM     TSTM WND DMG     4 WSW MADISON           30.44N 83.48W
06/18/2015                   MADISON            FL   911 CALL CENTER

            TREES DOWN NEAR I-10 MILE MARKER 250

&&

DVD

Local storm report, Jun 18, 5:16 PM EDT, 1 hour 26 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE TALLAHASSEE FL
516 PM EDT THU JUN 18 2015

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

0423 PM     TSTM WND DMG     4 WSW MADISON           30.44N 83.48W
06/18/2015                   MADISON            FL   911 CALL CENTER

            TREES DOWN ON I-10 MILE MARKER 250 BLOCKING BOTH
            WESTBOUND LANES. UPDATED TO INCLUDE ADDITIONAL INFO

&&

DVD

The office that day

Everything else NWS Tallahassee, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 17, 9:20 PM EDT	Severe Thunderstorm Warning	TAE	Randolph, Terrell	29 min
Jun 18, 6:36 PM EDT	Severe Thunderstorm Warning	TAE	Clay, Quitman, Randolph	54 min
Jun 18, 7:23 PM EDT	Severe Thunderstorm Warning	TAE	Terrell	35 min

Nearby

Severe Thunderstorm Warnings in Georgia, 2015 Every severe thunderstorm warning in 2015

Sources

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