Alert archive / North Carolina / Areal Flood Advisories in 2021
Areal Flood Advisory 55, NWS Raleigh, NC
NWS Raleigh, NC issued this areal flood advisory at Jul 19, 2021, 9:56 AM EDT for Alamance County, Guilford County, Orange County, North Carolina. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 19, 2021, 9:56 AM EDT (13:56 UTC)
- Expired
- Jul 19, 2021, 1:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
Counties Alamance County, NC, Guilford County, NC, Orange County, NC
The radar
The Raleigh/Durham radar (KRAX), 96 km from the middle of the area, began a volume at 13:56 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
Roanoke, VA (KRNK), launched 12:00Z, 1.9 hours before the alert went out and 127 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
- 1 J/kg
- Mixed-layer CIN
- -146 J/kg
- Mixed-layer LCL
- 1072 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -19 m²/s²
- 0-3 km storm-relative helicity
- 9 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Raleigh, NC wrote its last area forecast discussion before this areal flood advisory went out at Jul 19, 9:25 AM EDT, 31 minutes earlier.
Area forecast discussion, Jul 19, 9:25 AM EDT, 31 minutes before
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</html>Hazardous weather outlook, Jul 19, 4:18 AM EDT, 5 hours 38 minutes before
Hazardous Weather Outlook National Weather Service Raleigh NC 418 AM EDT Mon Jul 19 2021 NCZ007>011-021>028-038>043-073>078-083>086-088-089-201200- Person-Granville-Vance-Warren-Halifax-Forsyth-Guilford-Alamance- Orange-Durham-Franklin-Nash-Edgecombe-Davidson-Randolph-Chatham-Wake- Johnston-Wilson-Stanly-Montgomery-Moore-Lee-Harnett-Wayne-Anson- Richmond-Scotland-Hoke-Cumberland-Sampson- 418 AM EDT Mon Jul 19 2021 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...Today and tonight. Showers and isolated thunderstorms will occur throughout the day today. Periods of heavy rain could lead to flooding, especially in low lying or poor drainage areas. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 8:33 PM EDT | Special Weather Statement | RAH | Chatham, Randolph | 57 min |
| Jul 18, 8:42 PM EDT | Areal Flood Advisory | RAH | Chatham, Montgomery, Moore, Randolph | 3 hr |
| Jul 18, 8:46 PM EDT | Special Weather Statement | RAH | Edgecombe, Halifax, Nash | 59 min |
| Jul 18, 8:54 PM EDT | Special Weather Statement | RAH | Durham | 36 min |
| Jul 18, 10:20 PM EDT | Areal Flood Advisory | RAH | Davidson, Montgomery, Randolph, Stanly | 3 hr |
| Jul 18, 11:19 PM EDT | Areal Flood Advisory | RAH | Granville, Person, Vance, Warren | 3 hr |
| Jul 19, 6:26 AM EDT | Areal Flood Advisory | RAH | Forsyth, Guilford | 3 hr |
| Jul 19, 10:53 AM EDT | Areal Flood Advisory | RAH | Durham, Orange | 3 hr |
| Jul 19, 12:19 PM EDT | Areal Flood Advisory | RAH | Alamance, Chatham, Durham, Franklin, Granville, Orange and 2 more | 3 hr |
| Jul 19, 1:57 PM EDT | Areal Flood Advisory | RAH | Cumberland, Harnett, Johnston | 3 hr |
| Jul 19, 3:28 PM EDT | Areal Flood Advisory | RAH | Cumberland, Harnett, Johnston, Sampson, Wayne | 3 hr |
| Jul 19, 4:49 PM EDT | Areal Flood Advisory | RAH | Cumberland, Sampson, Wayne | 85 min |
| Jul 19, 5:12 PM EDT | Special Weather Statement | RAH | Wayne | 48 min |
| Jul 19, 5:28 PM EDT | Flash Flood Warning | RAH | Cumberland, Hoke, Sampson | 3 hr |
Nearby
Areal Flood Advisories in North Carolina, 2021Every areal flood advisory 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.