Alert archive / North Carolina / Flash Flood Warnings in 2016

Flash Flood Warning 19, NWS Raleigh, NC

July 31, 2016Davidson County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 31, 2016, 9:25 PM EDT for Davidson County, North Carolina. It was in force for 5 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 31, 2016, 9:25 PM EDT (01:25 UTC)
Expired
Aug 1, 2016, 2:15 AM EDT
In force
5 hr
Issued by
NWS Raleigh, NC
Area
Storm-based polygon
Flood severity
None

County Davidson County, NC

The radar

The Roanoke radar (KFCX), 136 km from the middle of the area, began a volume at 01:26 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
Jul 31, 9:30 PM EDTFLASH FLOOD5 Nne Gordontown, NCWATER RESCUE AT THE 1100 BLOCK OF LEE RD... SOUTH OF THOMASVILLE. HIGH WATER WAS ALSO REPORTED ON LIGHT RD AND ON LEE RD NEAR HWY 109.

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, 1.4 hours before the alert went out and 39 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 00:00Z on 2016-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 537 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 00:00Z on 2016-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 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
537 J/kg
Mixed-layer CIN
-66 J/kg
Mixed-layer LCL
1704 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
64 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

As transmitted.

460 
WGUS52 KRAH 010125
FFWRAH
NCC057-010315-
/O.NEW.KRAH.FF.W.0019.160801T0125Z-160801T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
925 PM EDT SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL DAVIDSON COUNTY IN CENTRAL NORTH CAROLINA...

* UNTIL 1115 PM EDT
  
* AT 919 PM EDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. FLASH FLOODING IS EXPECTED TO
  BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LEXINGTON...THOMASVILLE...GORDONTOWN AND HIGH ROCK LAKE. 

THIS INCLUDES THE FOLLOWING FLOOD PRONE AREAS...HAMBY CREEK AT
TURNER ROAD...HAMBY CREEK AT REMER-REGAN ROAD...AND DAMS ON CEDAR DR
AND MAY ROAD ALONG CEDAR LODGE ROAD.

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.

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

&&

LAT...LON 3588 8023 3590 8005 3568 8006 3567 8024

$$

10
4 follow-up statements
111 
WGUS72 KRAH 010240
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
1040 PM EDT SUN JUL 31 2016

NCC057-010315-
/O.CON.KRAH.FF.W.0019.000000T0000Z-160801T0315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON NC-
1040 PM EDT SUN JUL 31 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1115 PM EDT FOR
EAST CENTRAL DAVIDSON COUNTY...

AT 1037 PM EDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. LEE RD NEAR HIGHWAY 109 AND LIGHT
RD NEAR DENTON RD BOTH EXPERIENCED HIGH WATER DUE TO THE HEAVY RAIN.
ADDITIONAL RAINFALL MAY CAUSE THESE AREAS TO BECOME DANGEROUS ONCE
AGAIN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LEXINGTON...THOMASVILLE...GORDONTOWN AND HIGH ROCK LAKE. 

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.

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

&&

LAT...LON 3588 8023 3590 8005 3568 8006 3567 8024

$$

10
489 
WGUS52 KRAH 010312
FFWRAH
NCC057-010615-
/O.EXT.KRAH.FF.W.0019.000000T0000Z-160801T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
1112 PM EDT SUN JUL 31 2016

THE NATIONAL WEATHER SERVICE IN RALEIGH HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL DAVIDSON COUNTY IN CENTRAL NORTH CAROLINA...

* UNTIL 215 AM EDT

* AT 1109 PM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED ROAD
  CLOSURES DUE TO FLOODING ON LIGHT ROAD NEAR DENTON ROAD...LEE ROAD
  NEAR HIGHWAY 109...AND LEE ROAD NEAR KENNEDY ROAD. MODERATE TO
  HEAVY RAIN CONTINUES TO FALL ACROSS THE WARNED AREA. FLASH
  FLOODING IS ALREADY OCCURRING.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LEXINGTON...THOMASVILLE...GORDONTOWN AND HIGH ROCK LAKE. 

ADDITIONAL RAINFALL AMOUNTS OF AN INCH OR MORE IS POSSIBLE IN THE
WARNED AREA OVER THE NEXT FEW HOURS AS THUNDERSTORMS CONTINUE TO
MOVE IN.

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.

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

&&

LAT...LON 3588 8023 3590 8005 3568 8006 3567 8024

$$

10
436 
WGUS72 KRAH 010506
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
106 AM EDT MON AUG 1 2016

NCC057-010615-
/O.CON.KRAH.FF.W.0019.000000T0000Z-160801T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON NC-
106 AM EDT MON AUG 1 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 215 AM EDT FOR
EAST CENTRAL DAVIDSON COUNTY...

AT 102 AM EDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED ROAD
CLOSURES DUE TO FLOODING ON LIGHT ROAD NEAR DENTON ROAD...LEE ROAD
NEAR HIGHWAY 109...AND LEE ROAD NEAR KENNEDY ROAD. THREE TO FIVE
INCHES OF RAIN HAVE FALLEN SINCE LAST EVENING.  WHILE RAIN RATES
HAVE DECREASED OVER THE PAST HOUR, ANOTHER THUNDERSTORM WITH HEAVY
RAIN IS MOVING EAST ACROSS NORTHERN DAVIDSON COUNTY AND WILL
CONTINUE THE THREAT OF FLASH FLOODING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LEXINGTON...THOMASVILLE...GORDONTOWN AND HIGH ROCK LAKE. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3588 8023 3590 8005 3568 8006 3567 8024

$$

22
466 
WGUS72 KRAH 010613
FFSRAH

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
213 AM EDT MON AUG 1 2016

NCC057-010619-
/O.EXP.KRAH.FF.W.0019.000000T0000Z-160801T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
DAVIDSON NC-
213 AM EDT MON AUG 1 2016

...THE FLASH FLOOD WARNING FOR EAST CENTRAL DAVIDSON COUNTY WILL
EXPIRE AT 215 AM EDT...

LAW ENFORCEMENT IN DAVIDSON COUNTY REPORTS THAT FLOOD WATERS HAVE
RECEDED IN THE THOMASVILLE AREA...AND ARE NO LONGER EXPECTED TO POSE
A THREAT TO LIFE OR PROPERTY.  HOWEVER..ANOTHER THUNDERSTORM WITH
RAIN RATES AROUND ONE INCH PER HOUR IS MOVING EAST ACROSS CENTRAL
DAVIDSON COUNTY AND MAY CAUSE SOME SWOLLEN CREEKS TO RISE OUT OF
THEIR BANKS AGAIN. PLEASE CONTINUE TO HEED ANY ROAD CLOSURES.

LAT...LON 3588 8023 3590 8005 3568 8006 3567 8024

$$

22

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 8:04 PM EDTSevere Thunderstorm WarningRAHAlamance, Chatham, Durham, Orange41 min
Jul 31, 8:09 PM EDTFlash Flood WarningRAHOrange96 min
Jul 31, 8:26 PM EDTSevere Thunderstorm WarningRAHDavidson, Randolph49 min
Jul 31, 8:43 PM EDTAreal Flood AdvisoryRAHDavidson, Randolph2 hr
Jul 31, 8:46 PM EDTSpecial Weather StatementRAHChatham, Durham, Wake74 min
Jul 31, 9:14 PM EDTAreal Flood AdvisoryRAHAlamance, Chatham, Durham, Orange2 hr
Jul 31, 9:27 PM EDTSevere Thunderstorm WarningRAHChatham, Durham, Harnett, Johnston, Lee, Wake36 min
Aug 1, 12:18 AM EDTAreal Flood AdvisoryRAHDavidson, Guilford, Randolph3 hr
Aug 1, 2:18 AM EDTAreal Flood AdvisoryRAHDavidson, Randolph3 hr
Aug 1, 4:19 PM EDTSpecial Weather StatementRAHSampson41 min
Aug 1, 4:24 PM EDTSpecial Weather StatementRAHRichmond36 min
Aug 1, 5:40 PM EDTSpecial Weather StatementRAHWayne65 min

Nearby

Flash Flood Warnings in North Carolina, 2016Every 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.