Alert archive / North Carolina / Flash Flood Warnings in 2016

Flash Flood Warning 39, NWS Raleigh, NC

September 28, 2016Alamance County, Orange County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Sep 28, 2016, 8:15 PM EDT for Alamance County, Orange County, North Carolina. It was in force for 3 hr. 6 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: Sep 28, 2016, 8:15 PM EDT (00:15 UTC)
Expired: Sep 28, 2016, 11:15 PM EDT
In force: 3 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

Counties Alamance County, NC, Orange County, NC

The radar

The Raleigh/Durham radar (KRAX), 76 km from the middle of the area, began a volume at 00:19 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
Sep 28, 9:00 PM EDT	FLOOD	1 Nne Burlington, NC	VEHICLES PARTIALLY SUBMERGED. WATER PART WAY UP THE DOORS.
Sep 28, 9:00 PM EDT	FLASH FLOOD	1 Nne Burlington, NC	VEHICLES PARTIALLY SUBMERGED. WATER PART WAY UP THE DOORS.
Sep 28, 9:30 PM EDT	FLOOD	1 Nne Burlington, NC	EMERGENCY MANAGEMENT AND POLICE DEPARTMENT REPORTED CONTINUED HIGH WATER WITH SOME ROAD CLOSURES IN BURLINGTON.
Sep 28, 9:30 PM EDT	FLASH FLOOD	1 Nne Burlington, NC	EMERGENCY MANAGEMENT AND POLICE DEPARTMENT REPORTED CONTINUED HIGH WATER WITH SOME ROAD CLOSURES IN BURLINGTON.
Sep 28, 10:30 PM EDT	FLOOD	1 E Pleasant Grove, NC	VIEWER REPORTED 14 FOOT HOLE ON TANGLE RIDGE TRAIL CAUSED BY FLOODING.
Sep 28, 10:30 PM EDT	FLASH FLOOD	1 E Pleasant Grove, NC	VIEWER REPORTED 14 FOOT HOLE ON TANGLE RIDGE TRAIL CAUSED BY FLOODING.

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, 0.3 hours before the alert went out and 61 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: 1262 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 849 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 162 m²/s²
0-3 km storm-relative helicity: 252 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.6

Open this sounding in Storm Lab

The text

As transmitted.

037 
WGUS52 KRAH 290015
FFWRAH
NCC001-135-290315-
/O.NEW.KRAH.FF.W.0039.160929T0015Z-160929T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
815 PM EDT WED SEP 28 2016

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  ORANGE COUNTY IN CENTRAL NORTH CAROLINA...
  ALAMANCE COUNTY IN CENTRAL NORTH CAROLINA...

* UNTIL 1115 PM EDT

* AT 813 PM EDT...DOPPLER RADAR INDICATED TRAINING THUNDERSTORMS
  THAT WERE CONTINUOUSLY REDEVELOPING ACROSS THE WARNED AREA. 2 TO
  LOCALLY 4 INCHES OF RAIN HAD ALREADY FALLEN NORTH OF BURLINGTON.
  ADDITIONAL AMOUNTS OF 1 TO 2 INCHES WILL PRODUCE FLASH FLOODING
  IN THE WARNED AREA.  

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BURLINGTON...GRAHAM...HILLSBOROUGH...MEBANE...ELON COLLEGE...
  GIBSONVILLE...HAW RIVER...SWEPSONVILLE...
  ALAMANCE AND LAKE MACKINTOSH MARINA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3624 7896 3597 7911 3587 7921 3588 7925
      3586 7925 3585 7924 3584 7953 3625 7953

$$

PWB

1 follow-up statement

440 
WGUS72 KRAH 290130
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
930 PM EDT WED SEP 28 2016

NCC001-135-290315-
/O.CON.KRAH.FF.W.0039.000000T0000Z-160929T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NC-ALAMANCE NC-
930 PM EDT WED SEP 28 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR
ORANGE AND ALAMANCE COUNTIES...

AT 926 PM EDT...RADAR INDICTED A WEAKENING TREND OF THE
THUNDERSTORMS OVER EASTERN GUILFORD AND ALAMANCE COUNTIES.
HOWEVER... THERE CONTINUED TO BE REPORTS FROM LOCAL LAW ENFORCEMENT
THE FLOODING CONTINUED IN NORTHERN AND CENTRAL ALAMANCE COUNTY
INCLUDING NUMEROUS REPORTS OF STREET FLOODING IN BURLINGTON.

RADAR INDICATED THAT BETWEEN 3 AND 5 INCHES OF RAIN HAD FALLEN NORTH
AND WEST OF BURLINGTON. ANY ADDITIONAL RAINFALL WILL PRODUCE
ADDITIONAL FLOODING. 

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BURLINGTON...GRAHAM...HILLSBOROUGH...MEBANE...ELON COLLEGE...
GIBSONVILLE...HAW RIVER...SWEPSONVILLE...
ALAMANCE AND LAKE MACKINTOSH MARINA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3624 7896 3597 7911 3587 7921 3588 7925
      3586 7925 3585 7924 3584 7953 3625 7953

$$

PWB

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 28, 8:02 PM EDT	Special Weather Statement	RAH	Cumberland	58 min
Sep 28, 8:10 PM EDT	Special Weather Statement	RAH	Montgomery, Stanly	65 min
Sep 28, 8:16 PM EDT	Special Weather Statement	RAH	Alamance, Randolph	59 min
Sep 28, 8:28 PM EDT	Flash Flood Warning	RAH	Guilford	3 hr
Sep 28, 9:11 PM EDT	Areal Flood Advisory	RAH	Montgomery, Stanly	3 hr
Sep 28, 9:30 PM EDT	Special Weather Statement	RAH	Cumberland	60 min
Sep 28, 10:24 PM EDT	Flash Flood Warning	RAH	Chatham, Montgomery, Moore, Randolph	3 hr
Sep 28, 11:27 PM EDT	Severe Thunderstorm Warning	RAH	Chatham, Harnett, Lee, Moore	48 min
Sep 28, 11:29 PM EDT	Special Weather Statement	RAH	Durham, Granville, Wake	46 min
Sep 29, 12:56 AM EDT	Areal Flood Advisory	RAH	Anson, Harnett, Hoke, Lee, Moore, Richmond and 1 more	3 hr
Sep 29, 1:01 AM EDT	River Flood Warning	RAH	Cumberland	4 days
Sep 29, 1:47 AM EDT	Flash Flood Warning	RAH	Anson, Harnett, Hoke, Lee, Moore, Richmond and 1 more	3 hr
Sep 29, 4:10 AM EDT	Areal Flood Advisory	RAH	Cumberland, Hoke, Sampson, Scotland	3 hr
Sep 29, 4:45 AM EDT	Flash Flood Warning	RAH	Harnett, Hoke, Moore, Richmond, Scotland	4 hr
Sep 29, 5:00 AM EDT	Flash Flood Warning Emergency	RAH	Cumberland, Harnett, Hoke	5 hr
Sep 29, 7:33 AM EDT	Areal Flood Advisory	RAH	Sampson	3 hr
Sep 29, 8:26 AM EDT	River Flood Warning	RAH	Chatham	21 hr
Sep 29, 8:32 AM EDT	Areal Flood Advisory	RAH	Edgecombe, Halifax, Nash, Wayne, Wilson	3 hr
Sep 29, 8:38 AM EDT	Areal Flood Warning	RAH	Harnett, Hoke, Moore, Richmond, Scotland	6 hr
Sep 29, 9:20 AM EDT	Flash Flood Warning	RAH	Wayne	3 hr
Sep 29, 10:01 AM EDT	Flash Flood Watch	RAH	Cumberland, Edgecombe, Harnett, Hoke, Johnston, Lee and 6 more	12 hr
Sep 29, 10:17 AM EDT	Areal Flood Warning	RAH	Cumberland, Harnett, Hoke, Sampson	6 hr
Sep 29, 10:40 AM EDT	Flash Flood Warning	RAH	Cumberland, Harnett	30 hr
Sep 29, 11:59 AM EDT	Flash Flood Warning	RAH	Cumberland, Hoke	30 hr
Sep 29, 12:14 PM EDT	Areal Flood Advisory	RAH	Wayne	3 hr
Sep 29, 1:21 PM EDT	Flash Flood Warning	RAH	Cumberland, Sampson	6 hr
Sep 29, 4:14 PM EDT	Areal Flood Warning	RAH	Cumberland, Harnett, Hoke, Sampson	6 hr
Sep 29, 6:48 PM EDT	Special Weather Statement	RAH	Anson	57 min
Sep 29, 7:18 PM EDT	Flash Flood Warning	RAH	Cumberland, Sampson	24 hr

Nearby

Flash Flood Warnings in North Carolina, 2016 Every flash flood warning in 2016

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.