Alert archive / North Carolina / Areal Flood Advisories in 2018
Areal Flood Advisory 252, NWS Greenville-Spartanburg, SC
NWS Greenville-Spartanburg, SC issued this areal flood advisory at Aug 20, 2018, 7:03 PM EDT for Caldwell County, North Carolina. It was in force for 117 min.
The area
The counties it named.
The facts
- Issued
- Aug 20, 2018, 7:03 PM EDT (23:03 UTC)
- Expired
- Aug 20, 2018, 9:00 PM EDT
- In force
- 117 min
- Issued by
- NWS Greenville-Spartanburg, SC
- Area
- Storm-based polygon
County Caldwell County, NC
The radar
The Greer radar (KGSP), 134 km from the middle of the area, began a volume at 23:05 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, 11.1 hours before the alert went out and 149 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
- 430 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 516 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
What forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at Aug 20, 5:17 PM EDT, 1 hour 46 minutes earlier.
Area forecast discussion, Aug 20, 5:17 PM EDT, 1 hour 46 minutes before
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</html>Hazardous weather outlook, Aug 20, 4:08 PM EDT, 2 hours 55 minutes before
Hazardous Weather Outlook National Weather Service Greenville-Spartanburg SC 408 PM EDT Mon Aug 20 2018 GAZ010-017-018-026-028-029-NCZ033-035>037-048>053-056>059-062>065- 068>072-082-501>510-SCZ001>014-019-212015- 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- 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-Chester-Greenwood- 408 PM EDT Mon Aug 20 2018 This Hazardous Weather Outlook is for northeast Georgia, piedmont North Carolina, western North Carolina and upstate South Carolina. .DAY ONE...Tonight. Scattered to numerous thunderstorms will continue into the evening across the western Carolinas and northeast Georgia. The greatest threat will be frequent cloud to ground lightning. The storms may produce high rainfall rates that could lead to isolated urban, low lying, and small stream flooding. The flooding threat will be highest over the foothills and Piedmont of North Carolina. Additionally, a few storms could become severe and produce large hail and damaging wind gusts. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. On Tuesday, a robust cold front will approach the forecast area from the west and help to generate numerous thunderstorms. Some of these storms could become severe and produce large hail and damaging wind gusts. Isolated urban and small stream flooding is also a threat with these storms. The flooding threat will be greatest over the higher terrain. .SPOTTER INFORMATION STATEMENT... None.
In the hours before
Special weather statement, Aug 20, 4:57 PM EDT, 2 hours 6 minutes before
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</html>Special weather statement, Aug 20, 6:36 PM EDT, 27 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
636 PM EDT MON AUG 20 2018
NCZ501-502-202300-
Caldwell Mountains NC-Greater Caldwell NC-
636 PM EDT MON AUG 20 2018
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN CALDWELL COUNTY
UNTIL 700 PM EDT...
At 635 PM EDT, Doppler radar was tracking a strong thunderstorm 10
miles west of Boomer, or near Elkville, moving northeast at 15 mph.
Locations to be impacted include...
Kings Creek.
Wind gusts up to 50 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.
&&
LAT...LON 3609 8147 3609 8145 3607 8144 3607 8141
3605 8139 3604 8139 3604 8137 3600 8133
3598 8133 3594 8142 3603 8156 3610 8151
3610 8150
TIME...MOT...LOC 2235Z 223DEG 12KT 3603 8142
LANESpecial weather statement, Aug 20, 6:37 PM EDT, 26 minutes before
Special Weather Statement
National Weather Service Greenville-Spartanburg SC
637 PM EDT MON AUG 20 2018
NCZ053-202300-
Buncombe NC-
637 PM EDT MON AUG 20 2018
...A STRONG THUNDERSTORM WILL IMPACT SOUTH CENTRAL BUNCOMBE COUNTY
UNTIL 700 PM EDT...
At 637 PM EDT, Doppler radar was tracking a strong thunderstorm 9
miles north of Hendersonville, or near Arden, moving northeast at 20
mph.
Locations to be impacted include...
Fairview In Buncombe County, Arden and B.R. Parkway-Nc Arboretum To
East Asheville.
Wind gusts up to 50 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.
&&
LAT...LON 3551 8235 3547 8240 3547 8242 3546 8243
3545 8247 3545 8252 3557 8249
TIME...MOT...LOC 2237Z 212DEG 16KT 3546 8248
LANEThe office that day
Everything else NWS Greenville-Spartanburg, SC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 8:08 PM EDT | Special Weather Statement | GSP | Rowan | 37 min |
| Aug 19, 8:14 PM EDT | Special Weather Statement | GSP | Lincoln | 31 min |
| Aug 19, 8:45 PM EDT | Special Weather Statement | GSP | Cabarrus | 30 min |
| Aug 20, 4:14 AM EDT | Areal Flood Advisory | GSP | Cabarrus, Iredell, Rowan | 2 hr |
| Aug 20, 6:12 AM EDT | Areal Flood Advisory | GSP | Cabarrus, Iredell, Rowan | 2 hr |
| Aug 20, 4:57 PM EDT | Special Weather Statement | GSP | Buncombe | 18 min |
| Aug 20, 6:36 PM EDT | Special Weather Statement | GSP | Caldwell | 24 min |
| Aug 20, 6:37 PM EDT | Special Weather Statement | GSP | Buncombe | 23 min |
| Aug 20, 7:48 PM EDT | Special Weather Statement | GSP | Alexander | 42 min |
Nearby
Areal Flood Advisories in North Carolina, 2018Every areal flood advisory in 2018
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.