Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 8, NWS Raleigh, NC

July 8, 2021Franklin County, Granville County, Wake County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 8, 2021, 3:07 PM EDT for Franklin County, Granville County, Wake County, 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: Jul 8, 2021, 3:07 PM EDT (19:07 UTC)
Expired: Jul 8, 2021, 5:30 PM EDT
In force: 2 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Franklin County, NC, Granville County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 28 km from the middle of the area, began a volume at 19:06 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
Jul 8, 4:32 PM EDT	FLASH FLOOD	2 Ese Purnell, NC	ROAD WAS CLOSED AT 4:32 PM AT THE INTERSECTION OF PURNELL RD AND JACKSON RD IN WAKE FOREST DUE TO FLASH FLOODING. THE ROAD IS NOW PASSABLE BUT CAUTION IS ADVISED.

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 12:00Z, 7.1 hours before the alert went out and 126 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.

091 
WGUS52 KRAH 081907
FFWRAH
NCC069-077-183-082130-
/O.NEW.KRAH.FF.W.0008.210708T1907Z-210708T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

The National Weather Service in Raleigh has issued a

* Flash Flood Warning for...
  West Central Franklin County in central North Carolina...
  Southeastern Granville County in central North Carolina...
  Central Wake County in central North Carolina...

* Until 530 PM EDT.

* At 307 PM EDT, Doppler radar indicated heavy rain across the 
  warned area. Between 3 and 3.5 inches of rain have fallen. 
  Additional rainfall amounts of 1 to 1.5 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...
  Raleigh, Wake Forest, Garner, Franklinton, Knightdale, Rolesville, 
  Youngsville, Purnell, Falls Lake and Lake Wheeler.

Also, portions of Crabtree Creek are running high, nearing flood 
stage of 12 feet at  Old Wake Forest Road.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3615 7857 3613 7834 3595 7840 3568 7850
      3568 7851 3569 7872

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

$$

CBL

2 follow-up statements

031 
WGUS72 KRAH 082022
FFSRAH

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

NCC069-077-183-082130-
/O.CON.KRAH.FF.W.0008.000000T0000Z-210708T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin NC-Granville NC-Wake NC-
422 PM EDT Thu Jul 8 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM EDT THIS 
AFTERNOON FOR WEST CENTRAL FRANKLIN, SOUTHEASTERN GRANVILLE AND 
CENTRAL WAKE COUNTIES...

At 422 PM EDT, Doppler radar indicated that the heavy rain has 
shifted north of the warned area, with 3 to 4 inches of rain have 
fallen. Any lingering flash flooding will gradually recede over the 
next hour, including flood waters
along Crabtree and Walnut Creeks. 

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...
  Raleigh, Wake Forest, Garner, Franklinton, Knightdale, Rolesville, 
  Youngsville, Purnell, Falls Lake and Lake Wheeler.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3615 7857 3613 7834 3595 7840 3568 7850
      3568 7851 3569 7872

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

$$

CBL

936 
WGUS72 KRAH 082121
FFSRAH

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

NCC069-077-183-082131-
/O.EXP.KRAH.FF.W.0008.000000T0000Z-210708T2130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Franklin NC-Granville NC-Wake NC-
521 PM EDT Thu Jul 8 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 530 PM EDT THIS AFTERNOON FOR 
WEST CENTRAL FRANKLIN, SOUTHEASTERN GRANVILLE AND CENTRAL WAKE 
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 3615 7857 3613 7834 3595 7840 3568 7850
      3568 7851 3569 7872

$$

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, 3:31 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Durham, Franklin, Granville, Person, Vance, Wake and 1 more	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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.