Alert archive / North Carolina / Flash Flood Warnings in 2021
Flash Flood Warning 15, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Aug 7, 2021, 9:28 AM EDT for Guilford County, North Carolina. It was in force for 81 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
- Aug 7, 2021, 9:28 AM EDT (13:28 UTC)
- Expired
- Aug 7, 2021, 10:49 AM EDT
- In force
- 81 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Flood severity
- None
County Guilford County, NC
The radar
The Roanoke radar (KFCX), 117 km from the middle of the area, began a volume at 13:31 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, 1.5 hours before the alert went out and 10 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
- 17 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 543 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 67 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
736
WGUS52 KRAH 071328
FFWRAH
NCC081-071530-
/O.NEW.KRAH.FF.W.0015.210807T1328Z-210807T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Raleigh NC
928 AM EDT Sat Aug 7 2021
The National Weather Service in Raleigh has issued a
* Flash Flood Warning for...
Central Guilford County in central North Carolina...
* Until 1130 AM EDT.
* At 928 AM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Greensboro, High Point, McLeansville, Pleasant Garden, Jamestown,
Lake Jeanette Marina, Lake Townsend, Forest Oaks, Lake Brandt,
Lake Townsend Marina, Monticello and Oak Hollow Marina.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 3594 8003 3607 8001 3622 7977 3621 7955
3609 7957 3594 7972 3594 7973
FLASH FLOOD...RADAR INDICATED
$$1 follow-up statement
970
WGUS72 KRAH 071449
FFSRAH
Flash Flood Statement
National Weather Service Raleigh NC
1049 AM EDT Sat Aug 7 2021
NCC081-071459-
/O.CAN.KRAH.FF.W.0015.000000T0000Z-210807T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Guilford NC-
1049 AM EDT Sat Aug 7 2021
...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL GUILFORD COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat.
LAT...LON 3594 8003 3607 8001 3622 7977 3621 7955
3609 7957 3594 7972 3594 7973
$$The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 6:22 AM EDT | Special Weather Statement | RAH | Alamance, Guilford, Randolph | 53 min |
| Aug 7, 6:38 AM EDT | Special Weather Statement | RAH | Wayne, Wilson | 52 min |
| Aug 7, 8:05 AM EDT | Flash Flood Warning | RAH | Randolph | 3 hr |
| Aug 7, 8:53 AM EDT | Areal Flood Advisory | RAH | Davidson, Forsyth, Guilford, Randolph | 112 min |
| Aug 7, 10:14 AM EDT | Areal Flood Advisory | RAH | Durham, Granville, Orange, Wake | 61 min |
| Aug 7, 11:41 AM EDT | Areal Flood Advisory | RAH | Franklin, Vance, Warren | 64 min |
| Aug 7, 12:18 PM EDT | Special Weather Statement | RAH | Halifax, Nash | 57 min |
| Aug 7, 6:21 PM EDT | Flash Flood Warning | RAH | Sampson, Wayne | 2 hr |
Nearby
Flash Flood Warnings in North Carolina, 2021Every flash flood warning 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.