Alert archive / Georgia / Special Weather Statements in 2013

Special Weather Statement, NWS Atlanta, GA

April 17, 2013Dade County, Georgia

NWS Atlanta, GA issued this special weather statement at Apr 17, 2013, 2:49 PM EDT for Dade County, Georgia. It was in force for 26 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: Apr 17, 2013, 2:49 PM EDT (18:49 UTC)
Expired: Apr 17, 2013, 3:15 PM EDT
In force: 26 min
Issued by: NWS Atlanta, GA

County Dade County, GA

The radar

The Northeast Alabama radar (KHTX), 58 km from the middle of the area, began a volume at 18:50 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

Nashville Metro, TN (KBNA), launched 12:00Z, 6.8 hours before the alert went out and 181 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: 1987 J/kg
Mixed-layer CIN: -28 J/kg
Mixed-layer LCL: 747 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 130 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.7

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 Apr 17, 1:48 PM EDT, 1 hour 1 minute earlier.

Area forecast discussion, Apr 17, 1:48 PM EDT, 1 hour 1 minute before

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Hazardous weather outlook, Apr 17, 10:25 AM EDT, 4 hours 24 minutes before

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In the hours before

Special weather statement, Apr 17, 2:07 PM EDT, 42 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
207 PM EDT WED APR 17 2013

GAZ016-171830-
207 PM EDT WED APR 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN WHITE COUNTY UNTIL
230 PM EDT...

AT 200 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER ANNA RUBY FALLS...MOVING SOUTHWEST AT 5 MPH.

RUNOFF FROM THESE STORMS WILL CAUSE MINOR FLOODING OF SMALL CREEKS
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES ACROSS
WHITE COUNTY...INCLUDING AREAS AROUND UNICOI STATE PARK...ANNA RUBY
FALLS...SAUTEE...ROBERTSTOWN...HELEN...LOW GAP SHELTER...WHITLEY GAP
SHELTER...QUALATCHEE LAKE...SMITHGALL WOODS CONSERVATION AREA AND
CAMP COLEMAN LAKE. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG
THE BANKS OF CREEKS AND STREAMS ARE SUBJECT TO MINOR FLOODING.
AROUND 1.50 TO 2.00 INCHES OF RAIN HAVE FALLEN WITHIN THE LAST HOUR.

&&

LAT...LON 3476 8362 3473 8362 3470 8363 3456 8381
      3463 8388 3472 8386 3473 8383 3478 8383
      3480 8376 3480 8368
TIME...MOT...LOC 1806Z 052DEG 5KT 3474 8375

Special weather statement, Apr 17, 2:49 PM EDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PEACHTREE CITY GA
249 PM EDT WED APR 17 2013

GAZ001-002-171915-
249 PM EDT WED APR 17 2013

...SIGNIFICANT WEATHER ADVISORY FOR HEAVY RAIN IN WALKER AND DADE
COUNTIES UNTIL 315 PM EDT...

AT 247 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM OVER CEDAR GROVE...MOVING NORTH AT 5 MPH.

RUNOFF FROM THESE STORMS WILL CAUSE MINOR FLOODING OF SMALL CREEKS
AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES ACROSS
WALKER AND DADE COUNTIES...INCLUDING AREAS AROUND CEDAR GROVE...
RISING FAWN...CHICKAMAUGA...COOPER HEIGHTS...CLOUDLAND CANYON STATE
PARK...NEW ENGLAND AND TRENTON. ADDITIONALLY...COUNTRY ROADS AND
FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS ARE SUBJECT TO MINOR
FLOODING. BRIEF WIND GUSTS MAY ACCOMPANY THIS STORM.

&&

LAT...LON 3493 8554 3489 8527 3465 8534 3467 8556
      3469 8556
TIME...MOT...LOC 1848Z 189DEG 6KT 3475 8544

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 17, 2:07 PM EDT	Special Weather Statement	FFC	White	23 min
Apr 17, 4:01 PM EDT	Special Weather Statement	FFC	Polk	29 min
Apr 17, 4:39 PM EDT	Special Weather Statement	FFC	Polk	36 min
Apr 17, 5:23 PM EDT	Special Weather Statement	FFC	Union	37 min
Apr 17, 5:54 PM EDT	Special Weather Statement	FFC	Catoosa, Dade	51 min
Apr 17, 6:04 PM EDT	Flash Flood Warning	FFC	Union	4 hr
Apr 17, 6:08 PM EDT	Special Weather Statement	FFC	Fannin	37 min
Apr 17, 6:51 PM EDT	Special Weather Statement	FFC	Fannin	24 min
Apr 17, 6:53 PM EDT	Special Weather Statement	FFC	Catoosa, Dade, Whitfield	37 min

Nearby

Special Weather Statements in Georgia, 2013 Every special weather statement in 2013

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.