Alert archive / North Carolina / Areal Flood Advisories in 2021
Areal Flood Advisory 1, NWS Raleigh, NC
NWS Raleigh, NC issued this areal flood advisory at Jan 1, 2021, 9:47 PM EST for 16 counties in North Carolina. It was in force for 58 min.
The area
The counties it named.
The facts
- Issued
- Jan 1, 2021, 9:47 PM EST (02:47 UTC)
- Expired
- Jan 1, 2021, 10:45 PM EST
- In force
- 58 min
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
Counties Anson County, NC, Chatham County, NC, Durham County, NC, Franklin County, NC, Granville County, NC, Harnett County, NC, Hoke County, NC, Lee County, NC, Montgomery County, NC, Moore County, NC, Orange County, NC, Richmond County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren County, NC
The radar
The Raleigh/Durham radar (KRAX), 54 km from the middle of the area, began a volume at 02:50 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 00:00Z, 2.8 hours before the alert went out and 89 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
- 6 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 416 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 883 m²/s²
- 0-3 km storm-relative helicity
- 1043 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 Jan 1, 8:30 PM EST, 1 hour 17 minutes earlier.
Area forecast discussion, Jan 1, 8:30 PM EST, 1 hour 17 minutes before
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</html>Hazardous weather outlook, Jan 1, 6:35 AM EST, 15 hours 12 minutes before
Hazardous Weather Outlook National Weather Service Raleigh NC 635 AM EST Fri Jan 1 2021 NCZ008>011-025>028-040>043-075>078-084>086-088-089-021200- Granville-Vance-Warren-Halifax-Durham-Franklin-Nash-Edgecombe- Chatham-Wake-Johnston-Wilson-Moore-Lee-Harnett-Wayne-Richmond- Scotland-Hoke-Cumberland-Sampson- 635 AM EST Fri Jan 1 2021 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...Today and tonight. Areas of fog may become widespread and dense this afternoon into at least early tonight. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. NCZ007-021>024-038-039-073-074-083-021200- Person-Forsyth-Guilford-Alamance-Orange-Davidson-Randolph-Stanly- Montgomery-Anson- 635 AM EST Fri Jan 1 2021 This Hazardous Weather Outlook is for central North Carolina. .DAY ONE...Today and tonight. Areas of fog may become widespread and dense this afternoon and evening, then again late tonight and Saturday morning. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. Areas of dense fog may linger for a few hours Saturday morning. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
In the hours before
Special weather statement, Jan 1, 7:45 PM EST, 2 hours 2 minutes before
Special Weather Statement
National Weather Service Raleigh NC
745 PM EST Fri Jan 1 2021
NCZ007>010-023>026-040-041-020145-
Chatham NC-Franklin NC-Vance NC-Durham NC-Alamance NC-Person NC-
Warren NC-Wake NC-Granville NC-Orange NC-
745 PM EST Fri Jan 1 2021
...AN AREA OF HEAVY RAIN WILL AFFECT EASTERN ALAMANCE...PERSON...
NORTHWESTERN WARREN...VANCE...ORANGE...GRANVILLE...WAKE...EASTERN
CHATHAM...DURHAM AND WESTERN FRANKLIN COUNTIES UNTIL 845 PM EST...
At 744 PM EST, Doppler radar was tracking an area of heavy rain along
a line extending from near Milton to near Pittsboro. Movement was
east at 55 mph.
Wind gusts up to 40 mph will be possible along with heavy downpours.
Locations impacted include...
Raleigh, Durham, Cary, Chapel Hill, Henderson, Oxford, Roxboro,
Hillsborough, Creedmoor and Pittsboro.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is occurring with these storms, and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 3581 7828 3574 7839 3559 7932 3624 7932
3625 7915 3654 7914 3654 7826
TIME...MOT...LOC 0044Z 250DEG 47KT 3660 7920 3570 7921The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 7:45 PM EST | Special Weather Statement | RAH | Chatham, Durham, Franklin, Granville, Orange, Person and 2 more | 60 min |
| Jan 2, 8:15 AM EST | Dense Fog Advisory | RAH | Alamance, Anson, Chatham, Davidson, Durham, Forsyth and 14 more | 3 hr |
| Jan 2, 10:14 AM EST | River Flood Warning | RAH | Halifax, Northampton | 7 days |
| Jan 2, 11:29 AM EST | River Flood Warning | RAH | Wayne | 10 days |
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.