Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 9, NWS Raleigh, NC

July 8, 20217 counties in North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 8, 2021, 3:31 PM EDT for 7 counties in 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: Jul 8, 2021, 3:31 PM EDT (19:31 UTC)
Expired: Jul 8, 2021, 5:43 PM EDT
In force: 2 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Durham County, NC, Franklin County, NC, Granville County, NC, Person County, NC, Vance County, NC, Wake County, NC, Warren County, NC

The radar

The Raleigh/Durham radar (KRAX), 58 km from the middle of the area, began a volume at 19:29 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, 7.5 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 715 J/kg
Mixed-layer CIN: -11 J/kg
Mixed-layer LCL: 720 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 90 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

553 
WGUS52 KRAH 081931
FFWRAH
NCC063-069-077-145-181-183-185-082230-
/O.NEW.KRAH.FF.W.0009.210708T1931Z-210708T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Raleigh NC
331 PM EDT Thu Jul 8 2021

The National Weather Service in Raleigh has issued a

* Flash Flood Warning for...
  Northeastern Durham County in central North Carolina...
  Northern Franklin County in central North Carolina...
  Granville County in central North Carolina...
  Eastern Person County in central North Carolina...
  Vance County in central North Carolina...
  North Central Wake County in central North Carolina...
  Warren County in central North Carolina...

* Until 630 PM EDT.

* At 331 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 2 and 3 inches of rain have fallen. 
  Additional rainfall amounts of 1 to 2 inches are possible in the 
  warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life threatening flash flooding. Heavy rain producing
           flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Henderson, Oxford, Creedmoor, Louisburg, Warrenton, Butner, 
  Norlina, Kittrell, Stem, Stovall, Middleburg, Macon, Centerville, 
  South Henderson, Gillburg, Dabney, Satterwhite Point Marina, 
  Ingleside, Steele Creek Marina & Campground and Drewry.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3654 7881 3654 7845 3654 7790 3621 7804
      3607 7810 3596 7817 3599 7838 3613 7832
      3616 7850 3617 7855 3600 7862 3601 7874
      3602 7877 3602 7881 3606 7882

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

CBL

1 follow-up statement

919 
WGUS72 KRAH 082143
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
543 PM EDT Thu Jul 8 2021

NCC063-069-077-145-181-183-185-082153-
/O.CAN.KRAH.FF.W.0009.000000T0000Z-210708T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Durham NC-Franklin NC-Granville NC-Person NC-Vance NC-Wake NC-Warren
NC-
543 PM EDT Thu Jul 8 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHEASTERN DURHAM, 
NORTHERN FRANKLIN, GRANVILLE, EASTERN PERSON, VANCE, NORTH CENTRAL 
WAKE AND WARREN COUNTIES...

Flood waters have receded. The heavy rain has ended. Flooding is no 
longer expected to pose a threat. Please continue to heed remaining 
road closures.

A Flash Flood Watch remains in effect until 600 PM EDT for a portion 
of central North Carolina.

LAT...LON 3654 7881 3654 7845 3654 7790 3621 7804
      3607 7810 3596 7817 3599 7838 3613 7832
      3616 7850 3617 7855 3600 7862 3601 7874
      3602 7877 3602 7881 3606 7882

$$

CBL

The office that day

Everything else NWS Raleigh, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 8, 8:13 AM EDT	Special Weather Statement	RAH	Cumberland, Hoke, Scotland	77 min
Jul 8, 8:52 AM EDT	Areal Flood Advisory	RAH	Cumberland, Hoke, Sampson	3 hr
Jul 8, 9:57 AM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Johnston, Sampson	78 min
Jul 8, 10:45 AM EDT	Special Weather Statement	RAH	Cumberland, Harnett, Johnston, Sampson, Wayne	90 min
Jul 8, 11:17 AM EDT	Tornado Warning	RAH	Wayne	28 min
Jul 8, 11:44 AM EDT	Areal Flood Advisory	RAH	Johnston, Wake, Wayne	3 hr
Jul 8, 11:54 AM EDT	Tornado Warning	RAH	Franklin, Nash	36 min
Jul 8, 12:22 PM EDT	Special Weather Statement	RAH	Edgecombe, Nash, Wilson	83 min
Jul 8, 12:31 PM EDT	Tornado Warning Tornado observed	RAH	Edgecombe, Wilson	15 min
Jul 8, 12:43 PM EDT	Special Weather Statement	RAH	Edgecombe	32 min
Jul 8, 1:32 PM EDT	Areal Flood Advisory	RAH	Johnston, Wake	3 hr
Jul 8, 1:41 PM EDT	Special Weather Statement	RAH	Edgecombe	49 min
Jul 8, 2:35 PM EDT	Special Weather Statement	RAH	Franklin, Granville, Nash, Vance, Wake, Warren	70 min
Jul 8, 2:46 PM EDT	Areal Flood Advisory	RAH	Johnston, Wake, Wayne	119 min
Jul 8, 3:07 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Franklin, Granville, Wake	2 hr
Jul 8, 5:00 PM EDT	Special Weather Statement	RAH	Halifax	45 min
Jul 8, 5:18 PM EDT	Special Weather Statement	RAH	Halifax	27 min

Nearby

Flash Flood Warnings in North Carolina, 2021 Every 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.