Alert archive / North Carolina / Flash Flood Warnings in 2020
Flash Flood Warning 42, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this flash flood warning at Aug 6, 2020, 7:32 PM EDT for Davie County, North Carolina. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Aug 6, 2020, 7:32 PM EDT (23:32 UTC)
- Expired
- Aug 6, 2020, 10:01 PM EDT
- In force
- 2 hr
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
- Flood severity
- None
County Davie County, NC
The radar
The Roanoke radar (KFCX), 117 km from the middle of the area, began a volume at 23:32 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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
Greensboro/Hi Pt, NC (KGSO), launched 12:00Z, 11.5 hours before the alert went out and 51 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
- 864 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 667 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 55 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.8
The text
As transmitted.
049
WGUS52 KGSP 062332
FFWGSP
NCC059-070245-
/O.NEW.KGSP.FF.W.0042.200806T2332Z-200807T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Greenville-Spartanburg SC
732 PM EDT Thu Aug 6 2020
The National Weather Service in Greenville-Spartanburg has issued a
* Flash Flood Warning for...
Northeastern Davie County in the piedmont of North Carolina...
* Until 1045 PM EDT.
* At 732 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 2 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Doppler radar.
IMPACT...Flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other
drainage and low lying areas.
* Some locations that will experience flash flooding include...
Bermuda Run, Farmington and Advance.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Flash Flood Warning means that flooding is imminent or occurring.
If you are in the warned area move to higher ground immediately.
Residents living along streams and creeks should take immediate
precautions to protect life and property.
When it is safe to do so, please report flooding or landslides
threatening roads or property to the National Weather Service
Greenville-Spartanburg by calling toll free, 1, 800, 2 6 7, 8 1 0 1,
by posting on our Facebook page, or via Twitter using hashtag
NWSGSP. Your message should describe the specific location where
impacts occurred and the depth of flooding observed.
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, urban areas, highways, streets and underpasses
as well as other drainage areas and low lying spots.
&&
LAT...LON 3592 8058 3602 8057 3604 8045 3603 8044
3602 8042 3600 8041 3599 8042 3598 8041
3597 8040 3597 8039 3593 8038
FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1 INCH IN 1 HOUR
$$
Krentz1 follow-up statement
583
WGUS72 KGSP 070201
FFSGSP
Flash Flood Statement
National Weather Service Greenville-Spartanburg SC
1001 PM EDT Thu Aug 6 2020
NCC059-070211-
/O.CAN.KGSP.FF.W.0042.000000T0000Z-200807T0245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Davie NC-
1001 PM EDT Thu Aug 6 2020
...FLASH FLOOD WARNING FOR NORTHEASTERN DAVIE COUNTY HAS BEEN
REPLACED WITH A FLOOD WARNING...
LAT...LON 3592 8058 3602 8057 3604 8045 3603 8044
3602 8042 3600 8041 3599 8042 3598 8041
3597 8040 3597 8039 3593 8038
$$
KrentzWhat forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Greenville-Spartanburg, SC wrote its last area forecast discussion before this flash flood warning went out at Aug 6, 4:52 PM EDT, 2 hours 40 minutes earlier.
Area forecast discussion, Aug 6, 4:52 PM EDT, 2 hours 40 minutes before
Area Forecast Discussion
National Weather Service Greenville-Spartanburg SC
452 PM EDT Thu Aug 6 2020
.SYNOPSIS...
Passing upper-level disturbances will produce greater than
typical coverage of showers and thunderstorms through Friday. A
return to more typical isolated to scattered summertime thunderstorm
activity is expected over the weekend as weak drying arrives from
the west. Moisture will gradually return late in the weekend through
the middle of next week to support a more active pattern once again.
&&
.NEAR TERM /THROUGH FRIDAY/...
As of 450 PM Thursday: Convection remaining relatively sparse this
afternoon, better coverage over the northern mountains and Blue
Ridge. The CAMs are still suggesting that the bulk of the convective
activity will happen during the evening hours over the wrn Piedmont
and Upstate, while convection may carry on into the late evening
across the entire region. That seems reasonable as it is what often
happens on days with a late start. Still think we also remain on
track for scattered severe storms with a wind damage threat, given
sfc-based CAPE already around 2500 J/kg, dCAPE above 800 J/kg, and
some mid-level dry air seen on satellite imagery. Temps were in good
shape.
Persistence will be the rule for the weather and the forecast of
the same for the next 24 hours as the upper trof axis remains in
place to our west. Just like last night, we may keep showery precip
around parts of the forecast area for the better part of the tonight
period before it finally wanes in the pre-dawn hours. On Friday,
more of the same. Hard to say if there will be the same amount of
morning cloudiness that will delay the onset again, but the fcst
looks the same in terms of coverage that will go beyond climo in
the afternoon. The environment should be conducive to a few pulse
severe storms again as well, with sfc-based CAPE in the 2000 -
3000 J/kg range and sfc-delta Theta-e above 30 deg. Temps will be
near normal as well.
&&
.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
As of 1230 pm EDT Thursday: Deeper moisture and higher PWAT values
will be displaced off to our east this weekend as weak upper trough
axis translates east and fills. Essentially, for the upcoming
weekend, wx conds are expected to be pretty typical of early August,
featuring a developing weaker flow regime, and seasonable humidity
levels. Dirunally fired deeper convective chances will be close to
climo values with piedmont maximum apparent temperatures approaching
95 each day.
&&
.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
As of 100 pm EDT Thursday: Still expectimg a weak westerly flow
regime with embedded weak s/wv's rippling thru to exist atop the SE
CONUS to start off the work week. PWAT progs starting on Monday
depict a moisting trend after a weekend featuring below climo values.
Despite limited Gulf moisture fetch, expecting a daily uptick in
diurnal PoPs for showers and thunderstorms each day.
PoPs may increase further above climo Wednesday and Thursday as
moisture begins to pool over the region as a frontal boundary lays
out across the Mid-Atlantic to the north. Anticipate plenty of lower
90s Piedmont to upper 80s mountain valley max temperatures each
afternoon, with mins a degree or so above climo through the period.
&&
.AVIATION /21Z THURSDAY THROUGH TUESDAY/...
At KCLT and Elsewhere: Thunderstorms have moved away from the TAF
sites, but a cell will move near KAND in the next hour or two. Will
keep TEMPO/VCTS in place as convection should continue to develop
through the evening. Otherwise...VFR with a light wind that has a
southerly component. The CAMs are somewhat at odds as to the timing
of thunderstorms across the region, but agree that all sites will be
affected by one at SOME point through the evening hours. Rather than
mess with PROB30s that have to be resolved later, the fcst goes
straight to a TEMPO at all sites for some 4-hr window in the evening
hours. Any convection after that will be handled with amendments, as
it is possible the storms will persist into the early morning hours.
After some convective debris thins out, guidance remains on the
track of developing MVFR/IFR stratus and fog before daybreak across
much of the region. Several sites get at least an MVFR restriction
in ceiling and/or vis, but confidence not really high enough to go
IFR everywhere yet. Might be another late initiation again on
Friday, so only KCLT gets a thunderstorm mention after 18Z.
Southerly flow will also persist.
Outlook: Coverage of thunderstorms will be more isolated to
scattered during the afternoon and evening over the weekend. Morning
fog/stratus restrictions will also be possible, especially over
the usual mountain valleys. Diurnal storms will become more likely
again from Monday onward.
Confidence Table...
21-03z 03-09Z 09-15Z 15-18Z
KCLT High 100% High 98% Med 76% High 90%
KGSP High 100% High 100% Low 56% High 98%
KAVL High 100% High 93% Med 70% High 96%
KHKY High 100% High 90% Med 67% High 92%
KGMU High 100% High 100% Low 59% High 98%
KAND High 100% High 100% Med 68% High 90%
The percentage reflects the number of guidance members agreeing
with the scheduled TAF issuance flight rule category. Complete hourly
experimental aviation forecast consistency tables are available at
the following link:
www.weather.gov/gsp/aviation
&&
.GSP WATCHES/WARNINGS/ADVISORIES...
GA...None.
NC...None.
SC...None.
&&
SYNOPSIS...CSH
NEAR TERM...PM/RWH
SHORT TERM...CSH
LONG TERM...CSH
AVIATION...PM/RWHHazardous weather outlook, Aug 6, 4:08 AM EDT, 15 hours 24 minutes before
Hazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 408 AM EDT Thu Aug 6 2020 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-070815- Rabun-Habersham-Stephens-Franklin-Hart-Elbert-Avery-Alexander- Iredell-Davie-Madison-Yancey-Mitchell-Swain-Haywood-Buncombe-Catawba- Rowan-Graham-Northern Jackson-Macon-Southern Jackson-Transylvania- Henderson-Cleveland-Lincoln-Gaston-Mecklenburg-Cabarrus-Union NC- 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-Greater Oconee- Greater Pickens-Greater Greenville-Spartanburg-Cherokee-York- Anderson-Abbeville-Laurens-Union SC-Chester-Greenwood- 408 AM EDT Thu Aug 6 2020 This Hazardous Weather Outlook is for northeast Georgia, Piedmont North Carolina, western North Carolina and Upstate South Carolina. .DAY ONE...Today and tonight. Numerous thunderstorms are expected to develop across the region this afternoon and evening, with the most widespread coverage likely occurring across western North Carolina. Any of these thunderstorms will be capable of producing dangerous lightning, gusty winds, and torrential downpours. Some of these storms may become severe, with damaging wind gusts being the primary threat. Any locations repeatedly affected by thunderstorms over a short period of time will be prone to localized flash flooding from the heavy rainfall. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. HG
In the hours before
Local storm report, Aug 6, 6:48 PM EDT, 44 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
648 PM EDT THU AUG 06 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0440 PM TSTM WND DMG 2 NNW ELBERTON 34.14N 82.88W
08/06/2020 ELBERT GA 911 CALL CENTER
911 CALL CENTER REPORTED TREES AND LIMBS DOWN BLOCKING
ROADWAY ON THE INTERSECTION BREWERS BRIDGE RD AND KATHWOOD DR.
&&Local storm report, Aug 6, 6:52 PM EDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
652 PM EDT THU AUG 06 2020
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0440 PM TSTM WND DMG 2 WNW BOWMAN 34.21N 83.06W
08/06/2020 ELBERT GA 911 CALL CENTER
911 CALL CENTER REPORTED HUGE TREE SNAPPED ON THE
INTERSECTION OF W HENDRICKS ST. AND FIVE FORKS RD.
&&Special weather statement, Aug 6, 6:59 PM EDT, 33 minutes before
Special Weather Statement National Weather Service Greenville-Spartanburg SC 659 PM EDT Thu Aug 6 2020 NCZ502-504-062330- Greater Burke NC-Greater Caldwell NC- 659 PM EDT Thu Aug 6 2020 ...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL CALDWELL AND CENTRAL BURKE COUNTIES UNTIL 730 PM EDT... At 659 PM EDT, Doppler radar was tracking a strong thunderstorm 6 miles east of Morganton, or near Drexel, moving northeast at 15 mph. Locations to be impacted include... Lenoir, Morganton, Sawmills, Valdese, Cajah's Mountain, Drexel, Connelly Springs, Rutherford College, Lake Rhodhiss and Hudson. Wind gusts up to 40 mph, pea size hail and very heavy rainfall rates up to 2 inches per hour will be possible in these areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Gusty winds can blow down trees that are dead, or that have weakened root systems. Outdoor furniture and similar items can be tossed around if not anchored. Seek shelter indoors. Torrential rainfall may flood areas with poor drainage, such as ditches and underpasses. Avoid these areas and do not cross flooded roads. Water levels of small streams may also rise rapidly. Seek higher ground if threatened by flood waters. && LAT...LON 3569 8161 3578 8169 3590 8154 3578 8142 TIME...MOT...LOC 2259Z 238DEG 12KT 3577 8158 KRENTZ
Special weather statement, Aug 6, 7:03 PM EDT, 29 minutes before
Special Weather Statement National Weather Service Greenville-Spartanburg SC 703 PM EDT Thu Aug 6 2020 NCZ035-036-056-062330- Iredell NC-Alexander NC-Catawba NC- 703 PM EDT Thu Aug 6 2020 ...STRONG THUNDERSTORMS WILL IMPACT NORTH CENTRAL CATAWBA...SOUTHERN ALEXANDER AND CENTRAL IREDELL COUNTIES UNTIL 730 PM EDT... At 703 PM EDT, Doppler radar indicated strong thunderstorms along a line extending from near Taylorsville to 3 miles northwest of Statesville, and moving northeast at 25 mph. Locations to be impacted include... Statesville, Taylorsville, Troutman, Stony Point, Lookout Shoals Lake, Bethlehem, Lake Hickory, Hiddenite, Little River In Alexander County and Turnersburg. Wind gusts up to 40 mph and pea size hail will be possible in these areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... Gusty winds can blow down trees that are dead, or that have weakened root systems. Outdoor furniture and similar items can be tossed around if not anchored. Seek shelter indoors. Torrential rainfall may flood areas with poor drainage, such as ditches and underpasses. Avoid these areas and do not cross flooded roads. Water levels of small streams may also rise rapidly. Seek higher ground if threatened by flood waters. && LAT...LON 3591 8073 3567 8090 3585 8134 3595 8134 TIME...MOT...LOC 2303Z 205DEG 21KT 3593 8123 3583 8092 KRENTZ
Special weather statement, Aug 6, 7:08 PM EDT, 24 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
708 PM EDT Thu Aug 6 2020
NCZ051-062345-
Swain NC-
708 PM EDT Thu Aug 6 2020
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL SWAIN COUNTY UNTIL 745
PM EDT...
At 708 PM EDT, Doppler radar was tracking a strong thunderstorm near
Bryson City, or over Smoky Mountains-Deep Creek, moving northeast at
15 mph.
Locations to be impacted include...
Bryson City, Smoky Mountains-Deep Creek, Smoky Mountains-Clingmans
Dome, Smoky Mountains-Oconaluftee, Cherokee and Whittier.
Wind gusts up to 40 mph and pea size hail will be possible in these
areas.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
The combination of gusty winds and saturated soil conditions will
cause scattered trees and power lines to fall. Seek shelter inside an
interior room.
Torrential rainfall may flood areas with poor drainage, such as
ditches and underpasses. Avoid these areas and do not cross flooded
roads. Water levels of small streams may also rise rapidly. Seek
higher ground if threatened by flood waters.
&&
LAT...LON 3555 8349 3551 8332 3547 8334 3546 8335
3536 8340 3541 8353
TIME...MOT...LOC 2308Z 205DEG 12KT 3545 8345
KRENTZSpecial weather statement, Aug 6, 7:18 PM EDT, 14 minutes before
Special Weather Statement National Weather Service Greenville-Spartanburg SC 718 PM EDT Thu Aug 6 2020 NCZ048-053-062345- Buncombe NC-Madison NC- 718 PM EDT Thu Aug 6 2020 ...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL MADISON AND NORTHWESTERN BUNCOMBE COUNTIES UNTIL 745 PM EDT... At 717 PM EDT, Doppler radar was tracking a strong thunderstorm 7 miles southwest of Marshall, or 7 miles northwest of Leicester, moving northeast at 10 mph. Locations to be impacted include... Marshall, Canto, Walnut and Luck. Wind gusts up to 40 mph and pea size hail will be possible in these areas. PRECAUTIONARY/PREPAREDNESS ACTIONS... The combination of gusty winds and saturated soil conditions will cause scattered trees and power lines to fall. Seek shelter inside an interior room. Torrential rainfall may flood areas with poor drainage, such as ditches and underpasses. Avoid these areas and do not cross flooded roads. Water levels of small streams may also rise rapidly. Seek higher ground if threatened by flood waters. && LAT...LON 3565 8283 3571 8288 3585 8274 3574 8261 TIME...MOT...LOC 2317Z 232DEG 10KT 3573 8278 KRENTZ
The office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 8:01 PM EDT | Special Weather Statement | GSP | Catawba | 29 min |
| Aug 5, 8:06 PM EDT | Areal Flood Advisory | GSP | Alexander, Burke, Caldwell, Catawba, Iredell | 3 hr |
| Aug 5, 8:14 PM EDT | Flash Flood Warning | GSP | Burke, Caldwell, Catawba | 3 hr |
| Aug 5, 10:42 PM EDT | Areal Flood Advisory | GSP | Davie, Iredell | 3 hr |
| Aug 5, 11:22 PM EDT | Special Weather Statement | GSP | Davie | 38 min |
| Aug 5, 11:25 PM EDT | Special Weather Statement | GSP | Alexander | 35 min |
| Aug 5, 11:58 PM EDT | Special Weather Statement | GSP | Iredell | 32 min |
| Aug 6, 2:24 PM EDT | Special Weather Statement | GSP | Henderson | 36 min |
| Aug 6, 3:19 PM EDT | Special Weather Statement | GSP | Cabarrus | 41 min |
| Aug 6, 3:21 PM EDT | Special Weather Statement | GSP | Polk | 24 min |
| Aug 6, 3:40 PM EDT | Special Weather Statement | GSP | Madison | 35 min |
| Aug 6, 3:44 PM EDT | Special Weather Statement | GSP | Madison | 31 min |
| Aug 6, 3:48 PM EDT | Special Weather Statement | GSP | McDowell | 27 min |
| Aug 6, 4:01 PM EDT | Special Weather Statement | GSP | Stanly | 29 min |
| Aug 6, 4:16 PM EDT | Special Weather Statement | GSP | Avery | 29 min |
| Aug 6, 5:58 PM EDT | Special Weather Statement | GSP | Caldwell | 32 min |
| Aug 6, 6:22 PM EDT | Special Weather Statement | GSP | Buncombe | 23 min |
| Aug 6, 6:47 PM EDT | Special Weather Statement | GSP | Davie | 58 min |
| Aug 6, 6:59 PM EDT | Special Weather Statement | GSP | Burke | 31 min |
| Aug 6, 7:03 PM EDT | Special Weather Statement | GSP | Alexander, Iredell | 27 min |
| Aug 6, 7:08 PM EDT | Special Weather Statement | GSP | Swain | 37 min |
| Aug 6, 7:18 PM EDT | Special Weather Statement | GSP | Madison | 27 min |
| Aug 6, 7:24 PM EDT | Areal Flood Advisory | GSP | Alexander, Davie, Iredell | 3 hr |
| Aug 6, 7:35 PM EDT | Special Weather Statement | GSP | Polk | 25 min |
| Aug 6, 7:37 PM EDT | Special Weather Statement | GSP | Catawba | 23 min |
| Aug 6, 7:41 PM EDT | Special Weather Statement | GSP | Iredell, Rowan | 34 min |
| Aug 6, 7:50 PM EDT | Special Weather Statement | GSP | Yancey | 25 min |
| Aug 6, 7:56 PM EDT | Special Weather Statement | GSP | Burke, Caldwell | 34 min |
Nearby
Flash Flood Warnings in North Carolina, 2020Every flash flood warning in 2020
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.