Alert archive / Georgia / Flood Watches in 2012
Flood Watch 3, NWS Atlanta, GA
NWS Atlanta, GA issued this flood watch at Sep 17, 2012, 5:44 PM EDT for 5 counties in Georgia. It was in force for 19 hr.
The area
The counties it named.
The facts
- Issued
- Sep 17, 2012, 5:44 PM EDT (21:44 UTC)
- Expired
- Sep 18, 2012, 1:01 PM EDT
- In force
- 19 hr
- Issued by
- NWS Atlanta, GA
- Flood severity
- None
Counties Catoosa County, GA, Dade County, GA, Murray County, GA, Walker County, GA, Whitfield County, GA
The radar
The Northeast Alabama radar (KHTX), 88 km from the middle of the area, began a volume at 21:46 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, 9.7 hours before the alert went out and 171 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.
- Mixed-layer CAPE
- 573 J/kg
- Mixed-layer CIN
- -41 J/kg
- Mixed-layer LCL
- 860 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
298 WGUS62 KFFC 172144 FFAFFC URGENT - IMMEDIATE BROADCAST REQUESTED FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 544 PM EDT MON SEP 17 2012 GAZ001>005-180545- /O.NEW.KFFC.FA.A.0003.120917T2144Z-120918T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DADE-WALKER-CATOOSA-WHITFIELD-MURRAY- 544 PM EDT MON SEP 17 2012 ...FLOOD WATCH IN EFFECT THROUGH TUESDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN PEACHTREE CITY HAS ISSUED A * FLOOD WATCH FOR A PORTION OF NORTHWEST GEORGIA. * THROUGH TUESDAY AFTERNOON. * SHOWERS AND THUNDERSTORMS OVER THE AREA WILL ALLOW FOR 2.5 TO 3 INCHES OF RAIN ACROSS NORTHWEST GEORGIA WITH ISOLATED HIGHER AMOUNTS. * ALTHOUGH SOILS HAVE BEEN DRY ACROSS NORTHWEST GEORGIA...EXPECTED RAINFALL AMOUNTS THROUGH TUESDAY AFTERNOON WILL ALLOW FOR POSSIBLE MINOR FLOODING OF SMALLER CREEKS...STREAMS...AND LOW- LYING FLOOD PRONE AREAS. LOOKOUT CREEK...WEST CHICKAMAUGA CREEK AND SOUTH CHICKAMAUGA CREEK SHOULD BE MONITORED CLOSELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$
3 follow-up statements
207 WGUS62 KFFC 180214 FFAFFC FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 1014 PM EDT MON SEP 17 2012 GAZ001>005-181015- /O.CON.KFFC.FA.A.0003.000000T0000Z-120918T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DADE-WALKER-CATOOSA-WHITFIELD-MURRAY- 1014 PM EDT MON SEP 17 2012 ...FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY AFTERNOON... THE FLOOD WATCH CONTINUES FOR * A PORTION OF NORTHWEST GEORGIA. * THROUGH TUESDAY AFTERNOON * GENERALLY 1 TO 1.5 INCHES OF RAIN HAS FALLEN ACROSS PORTIONS OF NORTHWEST GEORGIA WITH 2 TO 2.5 INCHES ALONG THE RIDGES. AN ADDITIONAL 1 TO 2 INCHES IS POSSIBLE THROUGH TUESDAY AFTERNOON. * ALTHOUGH SOILS HAVE BEEN DRY ACROSS NORTHWEST GEORGIA... EXPECTED RAINFALL AMOUNTS THROUGH TUESDAY AFTERNOON WILL ALLOW FOR POSSIBLE MINOR FLOODING OF SMALLER CREEKS... STREAMS...AND LOW LYING FLOOD PRONE AREAS. LOOKOUT CREEK... WEST CHICKAMAUGA CREEK AND SOUTH CHICKAMAUGA CREEK SHOULD BE MONITORED CLOSELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$
864 WGUS62 KFFC 180725 FFAFFC FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 325 AM EDT TUE SEP 18 2012 GAZ001>005-181530- /O.CON.KFFC.FA.A.0003.000000T0000Z-120918T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DADE-WALKER-CATOOSA-WHITFIELD-MURRAY- 325 AM EDT TUE SEP 18 2012 ...FLOOD WATCH REMAINS IN EFFECT UNTIL 2 PM EDT THIS AFTERNOON... THE FLOOD WATCH CONTINUES FOR * A PORTION OF NORTHWEST GEORGIA. * UNTIL 2 PM EDT THIS AFTERNOON * GENERALLY 2 TO 3 INCHES OF RAIN HAS ALREADY FALLEN ACROSS PORTIONS OF NORTHWEST GEORGIA. UP TO AN ADDITIONAL 1 INCH OF RAIN IS POSSIBLE THROUGH THIS AFTERNOON. * EXPECTED RAINFALL AMOUNTS THROUGH THIS AFTERNOON WILL ALLOW FOR POSSIBLE MINOR FLOODING OF SMALLER CREEKS...STREAMS...AND LOW LYING FLOOD PRONE AREAS. LOOKOUT CREEK... WEST CHICKAMAUGA CREEK AND SOUTH CHICKAMAUGA CREEK SHOULD BE MONITORED CLOSELY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FLOOD WATCH MEANS THERE IS A POTENTIAL FOR FLOODING BASED ON CURRENT FORECASTS. YOU SHOULD MONITOR LATER FORECASTS AND BE ALERT FOR POSSIBLE FLOOD WARNINGS. THOSE LIVING IN AREAS PRONE TO FLOODING SHOULD BE PREPARED TO TAKE ACTION SHOULD FLOODING DEVELOP. && $$
630 WGUS62 KFFC 181701 FFAFFC FLOOD WATCH NATIONAL WEATHER SERVICE PEACHTREE CITY GA 101 PM EDT TUE SEP 18 2012 GAZ001>005-181815- /O.CAN.KFFC.FA.A.0003.000000T0000Z-120918T1800Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ DADE-WALKER-CATOOSA-WHITFIELD-MURRAY- 101 PM EDT TUE SEP 18 2012 ...FLOOD WATCH IS CANCELLED... THE FLOOD WATCH THAT WAS IN EFFECT FOR A PORTION OF NORTHWEST GEORGIA HAS BEEN CANCELLED. HEAVY RAIN FELL OVERNIGHT AND EARLY THIS MORNING...WITH WIDESPREAD AMOUNTS REACHING 2.5 TO 3 INCHES ACROSS DADE...WALKER...CAROOSA...WHITFIELD...AND MURRAY COUNTIES. MINOR FLOODING RESULTED FROM THE HEAVY RAIN...INCLUDING AT LOOKOUT CREEK AT NEW ENGLAND. WHILE SOME LOCATIONS MAY STILL SEE MINOR FLOODING BEFORE THE CREEKS RECEDE OVERNIGHT AND WEDNESDAY MORNING...NO ADDITIONAL SIGNIFICANT HEAVY RAIN IS EXPECTED. $$
The office that day
Everything else NWS Atlanta, GA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 17, 5:34 PM EDT | Special Weather Statement | FFC | Walker | 26 min |
Nearby
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.