Alert archive / North Carolina / Flash Flood Watches in 2021
Flash Flood Watch 9, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood watch at Sep 20, 2021, 3:01 PM EDT for Habersham County, Rabun County, Georgia; 13 counties in North Carolina. It took effect at Sep 20, 2021, 8:00 PM EDT. It was in force for 15 hr.
The area
The counties it named.
The facts
- Issued
- Sep 20, 2021, 3:01 PM EDT (19:01 UTC)
- In effect from
- Sep 20, 2021, 8:00 PM EDT
- Expired
- Sep 21, 2021, 10:32 AM EDT
- In force
- 15 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Flood severity
- None
Counties Habersham County, GA, Rabun County, GA, Avery County, NC, Buncombe County, NC, Burke County, NC, Caldwell County, NC, Henderson County, NC, Jackson County, NC, Macon County, NC, McDowell County, NC, Mitchell County, NC, Polk County, NC, Rutherford County, NC, Transylvania County, NC, Yancey County, NC
The radar
The Greer radar (KGSP), 70 km from the middle of the area, began a volume at 19:06 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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 7.0 hours before the alert went out and 242 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
- 48 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 789 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
527 WGUS62 KGSP 201901 FFAGSP URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Greenville-Spartanburg SC 301 PM EDT Mon Sep 20 2021 .Abundant moisture across the region will lead to widespread rain, especially over the mountains and adjacent foothills through the middle of the week. GAZ010-017-NCZ062>065-507>510-SCZ001>003-210315- /O.NEW.KGSP.FF.A.0009.210921T0000Z-210922T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Rabun-Habersham-Macon-Southern Jackson-Transylvania-Henderson- Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk- Oconee Mountains-Pickens Mountains-Greenville Mountains- Including the cities of Forest City, Tigerville, Westminster, Brevard, Pumpkintown, Hollywood, East Flat Rock, Mountain Rest, Clarkesville, Columbus, Tryon, Saluda, Mountain City, Clayton, Gowensville, Chimney Rock State Park, Cashiers, Cedar Mountain, Rutherfordton, Little River, Rainbow Springs, Highlands, Spindale, Pine Mountain, Mill Spring, Cleveland, Kyle, Walhalla, Wolf Mountain, Franklin, Etowah, Dana, Slater-Marietta, Tuxedo, Demorest, Hendersonville, Fletcher, Cornelia, and Baldwin 301 PM EDT Mon Sep 20 2021 ...FLASH FLOOD WATCH IN EFFECT FROM 8 PM EDT THIS EVENING THROUGH TUESDAY EVENING... The National Weather Service in Greenville-Spartanburg has issued a * Flash Flood Watch for portions of northeast Georgia, western North Carolina and upstate South Carolina, including the following areas, in northeast Georgia, Habersham and Rabun. In western North Carolina, Eastern Polk, Greater Rutherford, Henderson, Macon, Polk Mountains, Rutherford Mountains, Southern Jackson and Transylvania. In upstate South Carolina, Greenville Mountains, Oconee Mountains and Pickens Mountains. * From 8 PM EDT this evening through Tuesday evening. * A plume of sub-tropical moisture will surge into the area tonight into Tuesday. Upslope flow will provide periods of heavy rainfall, especially along the southern Blue Ridge Escarpment. Rainfall will be ongoing between this evening and throughout the day Tuesday. Rainfall amounts will be 2-4" with locally higher amounts possible through Tuesday. * With the amount of rainfall expected, this could cause rapid rises in streams and creeks. Minor mainstem river flooding can't be ruled out especially in the Upper French Broad River Valley. Urban flooding will be possible as well, mainly in poor drainage and low-lying areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rainfall of more than five inches in similar storms has been associated with an increased risk of landslides and rockslides. If you live on a mountainside or in a cove at the base of a mountain, especially near a stream, be ready to leave in advance of the storm or as quickly as possible should rising water, moving earth, or rocks threaten. Consider postponing travel along mountain roads during periods of heavy rainfall. && $$ CAC
3 follow-up statements
944 WGUS62 KGSP 210148 FFAGSP URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Greenville-Spartanburg SC 948 PM EDT Mon Sep 20 2021 .Abundant moisture across the region will lead to widespread rain, especially over the mountains and North Carolina foothills through the middle of the week. NCZ033-049-050-053-501>506-211000- /O.EXA.KGSP.FF.A.0009.000000T0000Z-210922T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Avery-Yancey-Mitchell-Buncombe-Caldwell Mountains-Greater Caldwell- Burke Mountains-Greater Burke-McDowell Mountains-Eastern McDowell- Including the cities of Banner Elk, Nebo, Lenoir, Burnsville, Dysartsville, Jonas Ridge, Woodlawn, Morganton, Newland, Celo, Ashford, Sugar Hill, Micaville, Patterson, Ingalls, Asheville, Old Fort, Candler, Spruce Pine, Ramseytown, Poplar, Kings Creek, Swiss, Pleasant Grove, Black Mountain, Busick, Fero, Sawmills, Glenwood, Marion, Granite Falls, and Valdese 948 PM EDT Mon Sep 20 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH TUESDAY EVENING... The National Weather Service in Greenville-Spartanburg has expanded the * Flash Flood Watch to include a portion of western North Carolina, including the following areas, Avery, Buncombe, Burke Mountains, Caldwell Mountains, Eastern McDowell, Greater Burke, Greater Caldwell, McDowell Mountains, Mitchell and Yancey. * Through Tuesday evening. * A plume of sub-tropical moisture will continue to overspread the area tonight into Tuesday. Upslope flow will result in periods of heavy rainfall, especially along the Blue Ridge Escarpment. The peak of the heavy rainfall is expected throughout the daylight hours Tuesday. Rainfall totals of 2-4" with locally higher amounts are expected through Tuesday. * With the amount of rainfall expected, rapid rises will occur along smaller creeks and streams, with some likely overflowing their banks into low-lying areas and roads. Minor mainstem river flooding can't be ruled out. Urban flooding will be possible as well, mainly in poor drainage and low-lying areas. $$ GAZ010-017-NCZ062>065-507>510-SCZ001>003-211000- /O.CON.KGSP.FF.A.0009.000000T0000Z-210922T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Rabun-Habersham-Macon-Southern Jackson-Transylvania-Henderson- Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk- Oconee Mountains-Pickens Mountains-Greenville Mountains- Including the cities of Forest City, Tigerville, Westminster, Brevard, Pumpkintown, Hollywood, East Flat Rock, Mountain Rest, Clarkesville, Columbus, Tryon, Saluda, Mountain City, Clayton, Gowensville, Chimney Rock State Park, Cashiers, Cedar Mountain, Rutherfordton, Little River, Rainbow Springs, Highlands, Spindale, Pine Mountain, Mill Spring, Cleveland, Kyle, Walhalla, Wolf Mountain, Franklin, Etowah, Dana, Slater-Marietta, Tuxedo, Demorest, Hendersonville, Fletcher, Cornelia, and Baldwin 948 PM EDT Mon Sep 20 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH TUESDAY EVENING... The Flash Flood Watch continues for * Portions of northeast Georgia, western North Carolina and upstate South Carolina, including the following areas, in northeast Georgia, Habersham and Rabun. In western North Carolina, Eastern Polk, Greater Rutherford, Henderson, Macon, Polk Mountains, Rutherford Mountains, Southern Jackson and Transylvania. In upstate South Carolina, Greenville Mountains, Oconee Mountains and Pickens Mountains. * Through Tuesday evening. * A plume of sub-tropical moisture will continue to overspread the area tonight into Tuesday. Upslope flow will result in periods of heavy rainfall, especially along the Blue Ridge Escarpment. The peak of the heavy rainfall is expected late tonight through Tuesday morning. Rainfall totals of 2-4" are expected through Tuesday. * With the amount of rainfall expected, rapid rises will occur along smaller creeks and streams, with some likely overflowing their banks into low-lying areas and roads. Minor mainstem river flooding can't be ruled out. Urban flooding will be possible as well, mainly in poor drainage and low-lying areas. $$ Lane
591 WGUS62 KGSP 210741 FFAGSP Flood Watch National Weather Service Greenville-Spartanburg SC 341 AM EDT Tue Sep 21 2021 GAZ010-017-NCZ062-210845- /O.CAN.KGSP.FF.A.0009.000000T0000Z-210922T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Rabun-Habersham-Macon- Including the cities of Clarkesville, Highlands, Pine Mountain, Demorest, Kyle, Mountain City, Clayton, Franklin, Cornelia, Hollywood, Baldwin, and Rainbow Springs 341 AM EDT Tue Sep 21 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of northeast Georgia and western North Carolina, including the following areas, in northeast Georgia, Habersham and Rabun. In western North Carolina, Macon has been cancelled. The Flood Watch is cancelled. The amount of rainfall today is not expected to be enough to cause flooding. $$ NCZ033-049-050-053-063>065-501>510-SCZ001>003-211545- /O.CON.KGSP.FF.A.0009.000000T0000Z-210922T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Avery-Yancey-Mitchell-Buncombe-Southern Jackson-Transylvania- Henderson-Caldwell Mountains-Greater Caldwell-Burke Mountains- Greater Burke-McDowell Mountains-Eastern McDowell-Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk-Oconee Mountains-Pickens Mountains-Greenville Mountains- Including the cities of Banner Elk, Nebo, Lenoir, Burnsville, Tigerville, Dysartsville, Jonas Ridge, Woodlawn, Morganton, Westminster, Newland, Brevard, Ashford, Sugar Hill, Pumpkintown, Micaville, East Flat Rock, Mountain Rest, Columbus, Cleveland, Patterson, Etowah, Saluda, Forest City, Ingalls, Asheville, Glenwood, Gowensville, Chimney Rock State Park, Marion, Cashiers, Cedar Mountain, Rutherfordton, Little River, Granite Falls, Spindale, Old Fort, Candler, Spruce Pine, Mill Spring, Ramseytown, Poplar, Kings Creek, Swiss, Walhalla, Pleasant Grove, Black Mountain, Dana, Busick, Slater-Marietta, Tuxedo, Fero, Sawmills, Celo, Hendersonville, Fletcher, Tryon, Wolf Mountain, and Valdese 341 AM EDT Tue Sep 21 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THIS EVENING... The Flash Flood Watch continues for * Portions of western North Carolina and upstate South Carolina, including the following areas, in western North Carolina, Avery, Buncombe, Burke Mountains, Caldwell Mountains, Eastern McDowell, Eastern Polk, Greater Burke, Greater Caldwell, Greater Rutherford, Henderson, McDowell Mountains, Mitchell, Polk Mountains, Rutherford Mountains, Southern Jackson, Transylvania and Yancey. In upstate South Carolina, Greenville Mountains, Oconee Mountains and Pickens Mountains. * Through this evening. * A plume of sub-tropical moisture will move across the region, mainly through the early afternoon. A southeasterly upslope flow will aid in the development of periods of heavy rain, especially along and near the Blue Ridge Escarpment in North Carolina. Rainfall totals of 2 to 3 inches are possible by sunset across the Watch area. * With the amount of rainfall expected, rapid rises will occur along smaller creeks and streams, with some likely overflowing their banks into low-lying areas and roads. Minor mainstem river flooding can't be ruled out. Urban flooding will be possible as well, mainly in poor drainage and low-lying areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Rainfall of up to three inches could be enough to cause some slope failures near the Blue Ridge Escarpment. Be careful when driving along mountain roads. As always, never attempt to drive through flooded roadways, especially where water is flowing over the roadway. && $$ Moore
275 WGUS62 KGSP 211432 FFAGSP Flood Watch National Weather Service Greenville-Spartanburg SC 1032 AM EDT Tue Sep 21 2021 NCZ033-049-050-053-063>065-501>510-SCZ001>003-211545- /O.CAN.KGSP.FF.A.0009.000000T0000Z-210922T0000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Avery-Yancey-Mitchell-Buncombe-Southern Jackson-Transylvania- Henderson-Caldwell Mountains-Greater Caldwell-Burke Mountains- Greater Burke-McDowell Mountains-Eastern McDowell-Rutherford Mountains-Greater Rutherford-Polk Mountains-Eastern Polk-Oconee Mountains-Pickens Mountains-Greenville Mountains- Including the cities of Banner Elk, Nebo, Lenoir, Burnsville, Tigerville, Dysartsville, Jonas Ridge, Woodlawn, Morganton, Westminster, Newland, Brevard, Ashford, Sugar Hill, Pumpkintown, Micaville, East Flat Rock, Mountain Rest, Columbus, Cleveland, Patterson, Etowah, Saluda, Forest City, Ingalls, Asheville, Glenwood, Gowensville, Chimney Rock State Park, Marion, Cashiers, Cedar Mountain, Rutherfordton, Little River, Granite Falls, Spindale, Old Fort, Candler, Spruce Pine, Mill Spring, Ramseytown, Poplar, Kings Creek, Swiss, Walhalla, Pleasant Grove, Black Mountain, Dana, Busick, Slater-Marietta, Tuxedo, Fero, Sawmills, Celo, Hendersonville, Fletcher, Tryon, Wolf Mountain, and Valdese 1032 AM EDT Tue Sep 21 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of western North Carolina and upstate South Carolina, including the following areas, in western North Carolina, Avery, Buncombe, Burke Mountains, Caldwell Mountains, Eastern McDowell, Eastern Polk, Greater Burke, Greater Caldwell, Greater Rutherford, Henderson, McDowell Mountains, Mitchell, Polk Mountains, Rutherford Mountains, Southern Jackson, Transylvania and Yancey. In upstate South Carolina, Greenville Mountains, Oconee Mountains and Pickens Mountains has been cancelled. The Flood Watch is cancelled. Flooding is no longer expected to pose a threat. Please continue to heed remaining road closures. $$ JPT
Nearby
Flash Flood Watches in North Carolina, 2021Flash Flood Watches in Georgia, 2021Flash Flood Watches in South Carolina, 2021Every flash flood watch in 2021
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.