Alert archive / Georgia / Special Weather Statements in 2016

Special Weather Statement, NWS Atlanta, GA

July 25, 2016Catoosa County, Dade County, Walker County, Georgia

NWS Atlanta, GA issued this special weather statement at Jul 25, 2016, 3:43 PM EDT for Catoosa County, Dade County, Walker 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: Jul 25, 2016, 3:43 PM EDT (19:43 UTC)
Expired: Jul 25, 2016, 4:30 PM EDT
In force: 47 min
Issued by: NWS Atlanta, GA

Counties Catoosa County, GA, Dade County, GA, Walker County, GA

The radar

The Northeast Alabama radar (KHTX), 74 km from the middle of the area, began a volume at 19:46 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, 7.7 hours before the alert went out and 182 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: 494 J/kg
Mixed-layer CIN: -62 J/kg
Mixed-layer LCL: 1243 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: -1 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Jul 25, 3:41 PM EDT, 2 minutes earlier.

Area forecast discussion, Jul 25, 3:41 PM EDT, 2 minutes before

Area Forecast Discussion
National Weather Service Peachtree City GA
341 PM EDT MON JUL 25 2016

.SHORT TERM /Tonight through Tuesday Night/...
No major changes in the short term forecast. We have been in this
pattern for at least 2 maybe 3 weeks now and there appears to be
no changes in the near future. The East-west oriented upper ridge
continues to control the weather pattern across the southern
CONUS. A wave developing over the central gulf is forecast to
intensify overnight and move toward the MS/LA coast Tuesday
morning. As it pushes onshore it should help to increase moisture
a bit across Southwestern/West Central GA. This will help to
increase the convective coverage across those areas for Tuesday
afternoon and evening but still only expecting General storms to
develop. All in all afternoon/evening diurnal convection will
continue with maximum coverage around 30-40 percent Tuesday.
SBCAPE values are expected to get a bit stronger Tuesday with
reading in the 1500-2500 J/kg range so may see a bit more
potential for wet microbursts and lightning. Temps should continue
slightly above normal with Heat Index values remaining below 105
so no advisory expected.

01

.LONG TERM /Wednesday through Monday/...
Models remain in good agreement for the week. There are some
differences toward the weekend per location of the deep moisture.
Through at least the end of the work week a ridge of high pressure
will be the dominant feature with diurnally driven convection each
afternoon and evening. By the weekend a trough sets up over the
Mississippi Valley...but the H5 ridge will keep it from pushing too
far east. This is where differences occur. The GFS brings the gulf
moisture into much of the CWA while the ECMWF and Canadian models
keep the moisture to the west of the CWA. Will maintain chance pops
through Friday and raise pops to high chance...mainly across north
Georgia...by the weekend and early next week.

16

&&

.AVIATION...
18Z Update...
Afternoon and evening showers and thunderstorms have begun to
generate across the area. Will see this convective activity
continue through the evening hours then subside by 02z-04z. Winds
are mainly out of the W-SW and will stay there through the TAF
period. Wind speeds will stay 10kt or less with some gust to 20kt
in and around TSRA activity. Not expecting any issues with
ceilings of VSBYs. Will see another round of SHRA/TSRA Tuesday
afternoon between 19z-00z.

//ATL Confidence...18Z Update...
Confidence high on all elements.

01

&&

.PRELIMINARY POINT TEMPS/POPS...
Athens          73  95  74  95 /  30  20  20  30
Atlanta         74  93  74  93 /  30  30  20  30
Blairsville     67  88  69  88 /  30  40  30  50
Cartersville    72  94  73  94 /  30  30  20  30
Columbus        74  94  75  94 /  20  30  20  30
Gainesville     74  93  74  93 /  30  30  20  30
Macon           74  96  74  96 /  20  30  20  30
Rome            72  94  72  94 /  30  40  20  40
Peachtree City  71  93  71  93 /  20  30  20  30
Vidalia         74  95  75  97 /  20  20  10  20

&&

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

SHORT TERM...01
LONG TERM....16
AVIATION...01

Hazardous weather outlook, Jul 25, 6:19 AM EDT, 9 hours 24 minutes before

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In the hours before

Special weather statement, Jul 25, 3:43 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
343 PM EDT MON JUL 25 2016

GAZ001>004-011-252030-
DADE GA-CATOOSA GA-WHITFIELD GA-CHATTOOGA GA-WALKER GA-
343 PM EDT MON JUL 25 2016

...SIGNIFICANT WEATHER ADVISORY FOR DADE...CATOOSA...NORTHWESTERN
WHITFIELD...NORTHWESTERN CHATTOOGA AND WALKER COUNTIES UNTIL 430 PM
EDT...

AT 343 PM EDT...A LINE OF STRONG THUNDERSTORMS WAS ALONG A LINE
EXTENDING FROM NEAR FORT OGLETHORPE TO 7 MILES WEST OF LAFAYETTE...
AND MOVING NORTH AT 10 MPH.

  HAZARD...UP TO 40 MPH WIND...FREQUENT CLOUD TO GROUND LIGHTNING
           AND HEAVY RAIN.

  IMPACT...PEOPLE OUTDOORS SHOULD SEEK SHELTER IMMEDIATELY. EXPECT
           MINOR DAMAGE TO TREE LIMBS AND BLOWING AROUND OF
           LIGHT...UNSECURED OBJECTS. LIGHTNING IS ONE OF NATURE'S
           LEADING KILLERS. REMEMBER...IF YOU CAN HEAR THUNDER...YOU
           ARE CLOSE ENOUGH TO BE STRUCK BY LIGHTNING. ELECTRICAL
           APPLIANCES SHOULD NOT BE USED UNLESS IN AN EMERGENCY.
           MOTORISTS SHOULD SLOW DOWN AND BE PREPARED FOR POSSIBLE
           LOSS OF CONTROL DUE TO HYDROPLANING. ALSO...THE HEAVY
           RAIN MAY CAUSE TEMPORARY STREET FLOODING OR ROAD PONDING
           IN SLOW DRAINAGE AREAS. WHEN WATER COVERS THE
           ROAD...REMEMBER TO TURN AROUND DON'T DROWN.

SOME LOCATIONS IN THE PATH OF THESE STORMS INCLUDE
LAFAYETTE...RINGGOLD...TRENTON...FORT OGLETHORPE...ROSSVILLE...
CHICKAMAUGA...VARNELL...LOOKOUT MOUNTAIN...TUNNEL
HILL...MENLO...RISING
FAWN...LAKEVIEW...NAOMI...CLOUDLAND...BOYNTON...NOBLE...COOPER
HEIGHTS...NEW ENGLAND...COLE CITY AND INDIAN SPRINGS.

LAT...LON 3499 8500 3489 8498 3444 8548 3497 8560
      3498 8559
TIME...MOT...LOC 1943Z 184DEG 9KT 3495 8521 3473 8541

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 5:22 PM EDT	Special Weather Statement	FFC	Heard	23 min
Jul 25, 6:33 PM EDT	Special Weather Statement	FFC	Haralson	27 min

Nearby

Special Weather Statements in Georgia, 2016 Every special weather statement in 2016

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.