Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 24, NWS Raleigh, NC

October 9, 20215 counties in North Carolina

NWS Raleigh, NC issued this flash flood warning at Oct 9, 2021, 3:47 AM EDT for 5 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, 3:47 AM EDT (07:47 UTC)
Expired: Oct 9, 2021, 5:48 AM EDT
In force: 2 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Anson County, NC, Chatham County, NC, Montgomery County, NC, Moore County, NC, Richmond County, NC

The radar

The Raleigh/Durham radar (KRAX), 95 km from the middle of the area, began a volume at 07:47 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, 5:00 AM EDT	FLASH FLOOD	3 Nnw Cumnock, NC	FLOODING OF GEORGES CREEK AND ROCKY BRANCH, IMPACTING ROSSER ROAD.

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

The nearest sounding before it

Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 7.8 hours before the alert went out and 85 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: 195 J/kg
Mixed-layer CIN: -59 J/kg
Mixed-layer LCL: 579 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

508 
WGUS52 KRAH 090747
FFWRAH
NCC007-037-123-125-153-091045-
/O.NEW.KRAH.FF.W.0024.211009T0747Z-211009T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Raleigh has issued a

* Flash Flood Warning for...
  Eastern Anson County in central North Carolina...
  Central Chatham County in central North Carolina...
  Montgomery County in central North Carolina...
  Moore County in central North Carolina...
  Richmond County in central North Carolina...

* Until 645 AM EDT.

* At 347 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 3 inches of rain 
  have fallen. 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...
  Rockingham, Wadesboro, Pittsboro, Troy, Carthage, Pinehurst, 
  Hamlet, Biscoe, Goldston, Mount Gilead, Robbins, Ellerbe, Foxfire, 
  Star, Dobbins Heights, Candor, Taylortown, Lilesville, Morven and 
  Norman.

This includes Interstate 74 south of Seagrove, Highway 421 between 
Siler City and Sanford, and Highways 1, 501, 64 and 220.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Be 
especially cautious at night when it is harder to recognize the 
dangers of flooding.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3481 8005 3514 8008 3539 7993 3551 7978
      3552 7956 3561 7955 3584 7908 3580 7901
      3568 7902 3562 7915 3556 7921 3557 7924
      3555 7925 3555 7930 3552 7935 3547 7936
      3540 7930 3512 7958 3492 7959 3482 7966

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

$$

10

3 follow-up statements

757 
WGUS72 KRAH 090844
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
444 AM EDT Sat Oct 9 2021

NCC007-090854-
/O.CAN.KRAH.FF.W.0024.000000T0000Z-211009T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Anson NC-
444 AM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN ANSON COUNTY...

A flood advisory remains in effect. Please continue to heed 
remaining road closures.

LAT...LON 3511 7996 3539 7993 3551 7978 3552 7956
      3561 7955 3584 7908 3580 7901 3568 7902
      3556 7921 3552 7935 3547 7936 3540 7930
      3512 7958 3492 7959 3482 7966 3481 7992
      3490 7985 3500 7990 3504 7988 3512 7992

$$

NCC037-123-125-153-091045-
/O.CON.KRAH.FF.W.0024.000000T0000Z-211009T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chatham NC-Montgomery NC-Moore NC-Richmond NC-
444 AM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM EDT THIS 
MORNING FOR CENTRAL CHATHAM, EASTERN MONTGOMERY, MOORE AND RICHMOND 
COUNTIES...

At 444 AM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across the warned area. Between 2 and 4 inches of rain have 
fallen. 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...
  Rockingham, Pittsboro, Carthage, Pinehurst, Hamlet, Biscoe, 
  Goldston, Robbins, Ellerbe, Foxfire, Star, Dobbins Heights, 
  Candor, Taylortown, Norman, Seven Lakes, Eagle Springs, Highfalls 
  and Derby.

Travel on highways and interstates across the advisory area may be 
difficult. Slow down and use caution.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Be 
especially cautious at night when it is harder to recognize the 
dangers of flooding.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3511 7996 3539 7993 3551 7978 3552 7956
      3561 7955 3584 7908 3580 7901 3568 7902
      3556 7921 3552 7935 3547 7936 3540 7930
      3512 7958 3492 7959 3482 7966 3481 7992
      3490 7985 3500 7990 3504 7988 3512 7992

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

$$

10

529 
WGUS72 KRAH 090922
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
522 AM EDT Sat Oct 9 2021

NCC123-125-153-090932-
/O.CAN.KRAH.FF.W.0024.000000T0000Z-211009T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Montgomery NC-Moore NC-Richmond NC-
522 AM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING IS CANCELLED FOR EASTERN MONTGOMERY, MOORE 
AND RICHMOND COUNTIES...

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

LAT...LON 3561 7955 3584 7908 3580 7901 3568 7902
      3562 7911 3562 7914 3556 7921 3556 7922
      3557 7924 3555 7925 3554 7929 3555 7928
      3555 7930 3554 7932 3553 7931 3552 7935
      3552 7956

$$

NCC037-091045-
/O.CON.KRAH.FF.W.0024.000000T0000Z-211009T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chatham NC-
522 AM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 AM EDT THIS 
MORNING FOR CENTRAL CHATHAM COUNTY...

At 522 AM EDT, Doppler radar indicated thunderstorms producing heavy 
rain across 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...
  Pittsboro, Goldston, Bynum, Seaforth Boat Dock, Harpers 
  Crossroads, Fearrington, Jordan Lake State Rec Area and Jordan 
  Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Be 
especially cautious at night when it is harder to recognize the 
dangers of flooding.

Please report observed flooding to local emergency services or law 
enforcement and request they pass this information to the National 
Weather Service when you can do so safely.

&&

LAT...LON 3561 7955 3584 7908 3580 7901 3568 7902
      3562 7911 3562 7914 3556 7921 3556 7922
      3557 7924 3555 7925 3554 7929 3555 7928
      3555 7930 3554 7932 3553 7931 3552 7935
      3552 7956

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

$$

10

097 
WGUS72 KRAH 090948
FFSRAH

Flash Flood Statement
National Weather Service Raleigh NC
548 AM EDT Sat Oct 9 2021

NCC037-090958-
/O.CAN.KRAH.FF.W.0024.000000T0000Z-211009T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Chatham NC-
548 AM EDT Sat Oct 9 2021

...FLASH FLOOD WARNING IS CANCELLED FOR CENTRAL CHATHAM COUNTY...

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

LAT...LON 3561 7955 3584 7908 3580 7901 3568 7902
      3562 7911 3562 7914 3556 7921 3556 7922
      3557 7924 3555 7925 3554 7929 3555 7928
      3555 7930 3554 7932 3553 7931 3552 7935
      3552 7956

$$

10

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, 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, 12:56 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Johnston, Nash, Wayne, Wilson	2 hr
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.