Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 27, NWS Raleigh, NC

October 9, 20214 counties in North Carolina

NWS Raleigh, NC issued this flash flood warning at Oct 9, 2021, 12:56 PM EDT for 4 counties in North Carolina. It was in force for 2 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Oct 9, 2021, 12:56 PM EDT (16:56 UTC)
Expired: Oct 9, 2021, 3:18 PM EDT
In force: 2 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Johnston County, NC, Nash County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 28 km from the middle of the area, began a volume at 16:58 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.

What was reported inside it

Time	Report	Where	Remark
Oct 9, 2:00 PM EDT	FLASH FLOOD	1 W Kenly, NC	OLD ROUTE 22 FLOODED BETWEEN J HOWELL RD AND BAY VALLEY RD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 4.9 hours before the alert went out and 152 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: 951 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 710 m above ground
0-6 km bulk shear: 20 kt
0-1 km storm-relative helicity: 54 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

955 
WGUS52 KRAH 091656
FFWRAH
NCC101-127-191-195-092100-
/O.NEW.KRAH.FF.W.0027.211009T1656Z-211009T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Raleigh NC
1256 PM EDT Sat Oct 9 2021

The National Weather Service in Raleigh has issued a

* Flash Flood Warning for...
  Eastern Johnston County in central North Carolina...
  Southwestern Nash County in central North Carolina...
  Northwestern Wayne County in central North Carolina...
  Southwestern Wilson County in central North Carolina...

* Until 500 PM EDT.

* At 1256 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 3 inches of rain have 
  fallen. Additional rainfall amounts of 1 to 3 inches are possible 
  in the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           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...
  Goldsboro, Fremont, Bailey, Micro, Selma, Pine Level, Kenly, 
  Princeton, Lucama, Middlesex, Pikeville, Sims, Buckhorn Reservoir, 
  Nahunta, Emit and Mar-Mac.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3534 7822 3538 7824 3547 7827 3559 7831
      3569 7833 3576 7834 3579 7831 3581 7826
      3582 7826 3583 7825 3584 7824 3586 7821
      3588 7814 3587 7813 3578 7802 3566 7797
      3551 7792 3541 7794 3533 7807 3533 7821

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

$$

28

2 follow-up statements

573 
WGUS72 KRAH 091806
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
206 PM EDT Sat Oct 9 2021

NCC101-127-191-195-092100-
/O.CON.KRAH.FF.W.0027.000000T0000Z-211009T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnston NC-Nash NC-Wayne NC-Wilson NC-
206 PM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 PM EDT THIS 
AFTERNOON FOR EASTERN JOHNSTON, SOUTHWESTERN NASH, NORTHWESTERN 
WAYNE AND SOUTHWESTERN WILSON COUNTIES...

At 206 PM EDT, emergency management reported Old Route 22 is flooded 
between J Howell Rd and Bay Valley Rd. . Between 2 and 4 inches of 
rain have fallen. Additional rainfall amounts up to 1 inch are 
possible in the warned area. Flash flooding is ongoing or expected 
to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Emergency management reported.

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

Some locations that will experience flash flooding include...
  Goldsboro, Fremont, Bailey, Micro, Selma, Pine Level, Kenly, 
  Princeton, Lucama, Middlesex, Pikeville, Sims, Buckhorn Reservoir, 
  Nahunta, Emit and Mar-Mac.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3534 7822 3538 7824 3547 7827 3559 7831
      3569 7833 3576 7834 3579 7831 3581 7826
      3582 7826 3583 7825 3584 7824 3586 7821
      3588 7814 3587 7813 3578 7802 3566 7797
      3551 7792 3541 7794 3533 7807 3533 7821

FLASH FLOOD...OBSERVED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

28

885 
WGUS72 KRAH 091918
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
318 PM EDT Sat Oct 9 2021

NCC101-127-191-195-091928-
/O.CAN.KRAH.FF.W.0027.000000T0000Z-211009T2100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Johnston NC-Nash NC-Wayne NC-Wilson NC-
318 PM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN JOHNSTON, 
SOUTHWESTERN NASH, NORTHWESTERN WAYNE AND SOUTHWESTERN WILSON 
COUNTIES...

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

LAT...LON 3534 7822 3538 7824 3547 7827 3559 7831
      3569 7833 3576 7834 3579 7831 3581 7826
      3582 7826 3583 7825 3584 7824 3586 7821
      3588 7814 3587 7813 3578 7802 3566 7797
      3551 7792 3541 7794 3533 7807 3533 7821

$$

28

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 9, 2:10 AM EDT	Areal Flood Advisory	RAH	Anson, Chatham, Lee, Montgomery, Moore, Randolph and 2 more	3 hr
Oct 9, 3:47 AM EDT	Flash Flood Warning Considerable damage threat	RAH	Anson, Chatham, Montgomery, Moore, Richmond	2 hr
Oct 9, 4:34 AM EDT	Areal Flood Advisory	RAH	Chatham, Durham, Lee, Moore, Wake	3 hr
Oct 9, 5:44 AM EDT	Flash Flood Warning Considerable damage threat	RAH	Wake	8 hr
Oct 9, 8:15 AM EDT	Areal Flood Advisory	RAH	Edgecombe, Nash, Wilson	3 hr
Oct 9, 8:24 AM EDT	Areal Flood Advisory	RAH	Edgecombe, Halifax, Nash	3 hr
Oct 9, 8:46 AM EDT	Areal Flood Advisory	RAH	Cumberland, Harnett, Johnston, Sampson, Wayne	4 hr
Oct 9, 9:17 AM EDT	Flash Flood Warning Considerable damage threat	RAH	Johnston, Wayne	3 hr
Oct 9, 11:12 AM EDT	Areal Flood Advisory	RAH	Johnston, Nash, Wilson	106 min
Oct 9, 1:45 PM EDT	Areal Flood Advisory	RAH	Wake	3 hr
Oct 9, 5:32 PM EDT	Areal Flood Advisory	RAH	Wake	6 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.