Alert archive / North Carolina / Flash Flood Warnings in 2014

Flash Flood Warning 7, NWS Raleigh, NC

May 15, 2014Orange County, North Carolina

NWS Raleigh, NC issued this flash flood warning at May 15, 2014, 6:35 PM EDT for Orange County, North Carolina. It was in force for 3 hr. 2 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
May 15, 2014, 6:35 PM EDT (22:35 UTC)
Expired
May 15, 2014, 9:30 PM EDT
In force
3 hr
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Flood severity
None

County Orange County, NC

The radar

The Raleigh/Durham radar (KRAX), 64 km from the middle of the area, began a volume at 22:37 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

TimeReportWhereRemark
May 15, 6:50 PM EDTFLASH FLOOD1 Ene Carrboro, NCBOLIN CREEK FLOODING AND UMSTEAD DR IMPASSABLE AND CLOSED DUE TO FLOODING.
May 15, 7:30 PM EDTFLASH FLOOD1 E Chapel Hill, NCREPORT FROM EMERGENCY MANAGEMENT OF EVACUATIONS TAKING PLACE AT THE CAMELOT VILLAGE APARTMENTS DUE TO 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 12:00Z, 10.6 hours before the alert went out and 71 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-pSkew-T log-p diagram, Greensboro/Hi Pt, NC at 12:00Z on 2014-05-15Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 114 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Greensboro/Hi Pt, NC at 12:00Z on 2014-05-15The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 133 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
114 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
582 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
133 m²/s²
0-3 km storm-relative helicity
130 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

366 
WGUS52 KRAH 152235
FFWRAH
NCC135-160130-
/O.NEW.KRAH.FF.W.0007.140515T2235Z-140516T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
635 PM EDT THU MAY 15 2014

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

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

* UNTIL 930 PM EDT

* AT 635 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS THAT WERE
  CONTINUOUSLY REDEVELOPING AND PRODUCING FLOODING OVER THE WARNED
  AREA.  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  CHAPEL HILL...CARRBORO AND CANE CREEK RESERVOIR. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM THE HEAVY RAIN WILL CAUSE FLASH FLOODING OF
CREEKS AND STREAMS...ROADS...LOW LYING AND POOR DRAINAGE AREAS. DO
NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. MANY
ROADS AND INTERSECTIONS IN THE AREA WILL QUICKLY FLOOD. WHEN
ENCOUNTERING FLOODED ROADS...TURN AROUND...DONT DROWN.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. FLOOD WATERS ARE USUALLY DEEPER THAN THEY APPEAR. THE WATER
DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY.  MOVE TO
HIGHER GROUND.

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

&&

LAT...LON 3586 7902 3586 7912 3588 7925 3590 7926
      3604 7926 3604 7899

$$

ELLIS
1 follow-up statement
469 
WGUS72 KRAH 152328
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
728 PM EDT THU MAY 15 2014

NCC135-160130-
/O.CON.KRAH.FF.W.0007.000000T0000Z-140516T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
ORANGE NC-
728 PM EDT THU MAY 15 2014

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 930 PM EDT FOR
SOUTHERN ORANGE COUNTY...

AT 727 PM EDT...EMERGENCY MANAGEMENT REPORTED FLASH FLOODING IN 
SOUTHERN ORANGE COUNTY. UP TO THREE INCHES OF RAIN HAVE ALREADY 
FALLEN. FLASH FLOODING IS ALREADY OCCURRING.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLASH FLOODING IS EXTREMELY DANGEROUS. NUMEROUD ROADS AND LOW LYING
AREAS WILL QUICKLY FLOOD. FLOOD WATERS WILL ALSO THREATEN SOME HOMES
AND BUSINESSES. IF YOU ARE EXPERIENCING FLOODING OR LIVE IN A FLOOD
PRONE AREA...MOVE TO HIGHER GROUND.

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

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY.  MOVE TO HIGHER GROUND.

&&

LAT...LON 3586 7902 3586 7912 3588 7925 3590 7926
      3604 7926 3604 7899

$$

ELLIS

The office that day

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

IssuedProductOfficeCountiesLasted
May 15, 3:55 AM EDTFlash Flood WatchRAHAlamance, Anson, Chatham, Cumberland, Davidson, Durham and 22 more25 hr
May 15, 8:47 AM EDTSpecial Weather StatementRAHForsyth58 min
May 15, 9:21 AM EDTSpecial Weather StatementRAHDavidson, Stanly39 min
May 15, 9:55 AM EDTSpecial Weather StatementRAHAnson, Montgomery, Stanly20 min
May 15, 9:57 AM EDTSpecial Weather StatementRAHGuilford33 min
May 15, 10:09 AM EDTSpecial Weather StatementRAHRandolph51 min
May 15, 10:38 AM EDTSpecial Weather StatementRAHRandolph37 min
May 15, 10:42 AM EDTAreal Flood AdvisoryRAHAnson, Davidson, Forsyth, Guilford, Montgomery, Moore and 3 more5 hr
May 15, 10:44 AM EDTSpecial Weather StatementRAHMontgomery, Richmond46 min
May 15, 11:14 AM EDTSpecial Weather StatementRAHAlamance46 min
May 15, 11:23 AM EDTSpecial Weather StatementRAHChatham37 min
May 15, 11:31 AM EDTSpecial Weather StatementRAHCumberland44 min
May 15, 11:47 AM EDTSpecial Weather StatementRAHLee43 min
May 15, 12:26 PM EDTSpecial Weather StatementRAHWake34 min
May 15, 12:42 PM EDTSpecial Weather StatementRAHWake33 min
May 15, 12:48 PM EDTSpecial Weather StatementRAHDurham27 min
May 15, 1:24 PM EDTSpecial Weather StatementRAHWake21 min
May 15, 1:28 PM EDTSevere Thunderstorm WarningRAHDurham, Granville, Wake47 min
May 15, 1:51 PM EDTAreal Flood AdvisoryRAHDurham, Orange, Wake114 min
May 15, 2:26 PM EDTSpecial Weather StatementRAHFranklin64 min
May 15, 3:19 PM EDTFlash Flood WarningRAHWake3 hr
May 15, 3:35 PM EDTSpecial Weather StatementRAHWayne25 min
May 15, 5:39 PM EDTSpecial Weather StatementRAHEdgecombe51 min
May 15, 5:54 PM EDTSevere Thunderstorm WarningRAHChatham, Durham, Granville, Orange66 min
May 15, 6:06 PM EDTTornado WarningRAHDurham24 min
May 15, 6:49 PM EDTSevere Thunderstorm WarningRAHGranville, Person56 min
May 15, 6:54 PM EDTTornado WarningRAHGranville, Person36 min
May 15, 7:06 PM EDTSpecial Weather StatementRAHDurham54 min

Nearby

Flash Flood Warnings in North Carolina, 2014Every flash flood warning in 2014

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.