Alert archive / North Carolina / Flash Flood Warnings in 2021

Flash Flood Warning 5, NWS Newport/Morehead City, NC

August 4, 20214 counties in North Carolina

NWS Newport/Morehead City, NC issued this flash flood warning at Aug 4, 2021, 7:13 AM EDT for 4 counties in North Carolina. It was in force for 3 hr. 8 reports 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: Aug 4, 2021, 7:13 AM EDT (11:13 UTC)
Expired: Aug 4, 2021, 10:08 AM EDT
In force: 3 hr
Issued by: NWS Newport/Morehead City, NC
Area: Storm-based polygon
Flood severity: None

Counties Carteret County, NC, Craven County, NC, Jones County, NC, Onslow County, NC

The radar

The Morehead City radar (KMHX), 19 km from the middle of the area, began a volume at 11:14 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
Aug 4, 7:45 AM EDT	FLOOD	1 Wsw Newport, NC	WATER RUNNING OVER ROBERTS ROAD NEAR THE CURVE BY CEDAR KEY. ROAD PASSABLE, WATER DEPTH ABOUT 5 INCHES.
Aug 4, 9:30 AM EDT	FLOOD	2 Wsw Wildwood, NC	ENTRANCE TO NEIGHBORHOOD COVERED WITH WATER, 2 TO 3 FEET DEEP. LOW LYING, POOR DRAINAGE AREA RIGHT OFF HIGHWAY 24.
Aug 4, 9:30 AM EDT	FLOOD	Bogue Inlet Pier, NC	EMERALD ISLE PUBLIC WORKS CLOSING REED DRIVE BETWEEN EAST AND WEST SEA VIEW DRIVES DUE TO HIGH WATER.
Aug 4, 9:30 AM EDT	FLASH FLOOD	2 Wsw Wildwood, NC	CORRECTS PREVIOUS FLOOD REPORT FROM 2 WSW WILDWOOD. ENTRANCE TO NEIGHBORHOOD COVERED WITH WATER, 2 TO 3 FEET DEEP. ENTRANCE NOT PASSABLE DUE TO HIGH WATER.
Aug 4, 9:30 AM EDT	FLASH FLOOD	Bogue Inlet Pier, NC	CORRECTS PREVIOUS FLOOD REPORT FROM BOGUE INLET PIER. EMERALD ISLE PUBLIC WORKS CLOSING REED DRIVE BETWEEN EAST AND WEST SEA VIEW DRIVES DUE TO HIGH WATER.
Aug 4, 9:32 AM EDT	FLASH FLOOD	1 Ese Merrimon, NC	MERRIMON ROAD FLOODED JUST BEFORE MERRIMON CHURCH. WATER ACROSS THE ROAD IN FIVE PLACES OUTSIDE JONAQUINâS SUBDIVISION. DOT HAS BEEN NOTIFIED. REPORT VIA FACEBOOK.
Aug 4, 9:32 AM EDT	FLASH FLOOD	1 Ese Merrimon, NC	MERRIMON ROAD FLOODED JUST BEFORE MERRIMON CHURCH. WATER ACROSS THE ROAD IN FIVE PLACES OUTSIDE JONAQUIN’S SUBDIVISION. DOT HAS BEEN NOTIFIED. REPORT VIA FACEBOOK.
Aug 4, 10:00 AM EDT	FLOOD	3 Ssw Newport, NC	NUMEROUS YARDS FLOODED ALONG HIBBS ROAD BETWEEN HIGHWAY 70 AND HIGHWAY 24. SOME HOMES ALMOST SURROUNDED BY WATER OR WATER UP TO NEAR THE HOUSE ITSELF.

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 00:00Z, 11.2 hours before the alert went out and 19 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: 162 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 481 m above ground
0-6 km bulk shear: 33 kt
0-1 km storm-relative helicity: 136 m²/s²
0-3 km storm-relative helicity: 228 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

As transmitted.

136 
WGUS52 KMHX 041113
FFWMHX
NCC031-049-103-133-041415-
/O.NEW.KMHX.FF.W.0005.210804T1113Z-210804T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Newport/Morehead City NC
713 AM EDT Wed Aug 4 2021

The National Weather Service in Newport/Morehead City has issued a

* Flash Flood Warning for...
  Carteret County in eastern North Carolina...
  Southeastern Craven County in eastern North Carolina...
  Southeastern Jones County in eastern North Carolina...
  East Central Onslow County in eastern North Carolina...

* Until 1015 AM EDT.

* At 713 AM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 4 and 6 inches of rain 
  have fallen. The expected rainfall rate is 1 to 2 inches in 1 
  hour. Additional rainfall amounts of 1 to 3 inches are possible in 
  the warned area. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Havelock, Morehead City, Newport, Harkers Island, Cedar Island, 
  Stella, Swansboro, South River, Cape Carteret, North River, 
  Straits, Smyrna, Merrimon, Marshallberg, Davis, Sealevel, 
  Atlantic, Pine Knoll Shores, Harlowe and Silverdale.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 3482 7727 3494 7691 3511 7602 3494 7608
      3479 7626 3458 7644 3459 7664 3462 7669
      3460 7712

FLASH FLOOD...RADAR INDICATED
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR

$$

8

1 follow-up statement

598 
WGUS72 KMHX 041408
FFSMHX

Flash Flood Statement
National Weather Service Newport/Morehead City NC
1008 AM EDT Wed Aug 4 2021

NCC031-049-103-133-041418-
/O.CAN.KMHX.FF.W.0005.000000T0000Z-210804T1415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Carteret NC-Craven NC-Jones NC-Onslow NC-
1008 AM EDT Wed Aug 4 2021

...FLASH FLOOD WARNING FOR CARTERET, SOUTHEASTERN CRAVEN, 
SOUTHEASTERN JONES AND EAST CENTRAL ONSLOW COUNTIES HAS BEEN 
REPLACED WITH A FLOOD ADVISORY...

LAT...LON 3482 7727 3494 7691 3511 7602 3494 7608
      3479 7626 3458 7644 3459 7664 3462 7669
      3460 7712

$$

5

The office that day

Everything else NWS Newport/Morehead City, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 3, 8:23 PM EDT	Flash Flood Warning	MHX	Carteret, Craven, Jones, Onslow	9 hr
Aug 3, 8:46 PM EDT	Beach Hazards Statement	MHX	Carteret, Dare, Hyde, Onslow	23 hr
Aug 3, 11:07 PM EDT	Special Marine Warning	MHX		38 min
Aug 4, 7:04 AM EDT	Flash Flood Warning	MHX	Dare, Hyde	3 hr
Aug 4, 9:20 AM EDT	Special Weather Statement	MHX	Dare	25 min
Aug 4, 10:08 AM EDT	Areal Flood Advisory	MHX	Carteret, Craven, Jones, Onslow	3 hr
Aug 4, 10:14 AM EDT	Areal Flood Advisory	MHX	Dare, Hyde	3 hr
Aug 4, 2:04 PM EDT	Areal Flood Advisory	MHX	Dare, Hyde	3 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.