Alert archive / North Carolina / Flash Flood Warnings in 2012
Flash Flood Warning 47, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Sep 8, 2012, 7:09 PM EDT for Wake County, North Carolina. It was in force for 3 hr. 10 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 8, 2012, 7:09 PM EDT (23:09 UTC)
- Expired
- Sep 8, 2012, 10:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Flood severity
- None
County Wake County, NC
The radar
The Raleigh/Durham radar (KRAX), 16 km from the middle of the area, began a volume at 23:11 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 8, 7:16 PM EDT | HEAVY RAIN 1.06 | 3 Wsw Raleigh, NC | 1.06 INCHES OF RAIN BETWEEN 6...50 AND 7...16 PM - WADE AVENUE AND RIDGE ROAD |
| Sep 8, 7:17 PM EDT | HEAVY RAIN 1 | 5 Ssw Rolesville, NC | 1.00 INCHES OF RAIN BETWEEN 6...40 AND 7...17 PM ON ARDEN BRANCH ROAD |
| Sep 8, 7:45 PM EDT | FLASH FLOOD | 1 E Raleigh, NC | WATER ACROSS THE ROADWAY AT ATLANTIC AVE AND HODGES ST. |
| Sep 8, 7:45 PM EDT | FLASH FLOOD | 4 Sw Raleigh, NC | WATER OVER AVENT FERRY RD AT TRAILWOOD RD. ROAD IS IMPASSABLE |
| Sep 8, 7:45 PM EDT | FLASH FLOOD | 5 E Cary, NC | HILLSBOROUGH STREET IS FLOODED AT SEVERAL LOCATIONS NEAR CHAPEL HILL RD. |
| Sep 8, 7:50 PM EDT | HEAVY RAIN 1.6 | 5 Ssw Rolesville, NC | FELL BETWEEN 640 PM AND 745 PM |
| Sep 8, 7:53 PM EDT | HEAVY RAIN 1.73 | 3 Wsw Raleigh, NC | FELL BETWEEN 650 PM AND 745 PM |
| Sep 8, 8:00 PM EDT | HEAVY RAIN 1.15 | 4 Sw Raleigh, NC | RAINFALL BETWEEN 630 PM AND 8 PM |
| Sep 8, 8:28 PM EDT | FLASH FLOOD | 3 W Raleigh, NC | TRAINED SPOTTER REPORTS 6 INCHES OF WATER ON LAKE BOONE TRAIL AND HORTON DRIVE. |
| Sep 8, 8:50 PM EDT | HEAVY RAIN 2.25 | 5 Ssw Rolesville, NC | 2.25 INCHES OF RAIN BETWEEN 6...40 AND 8...50 PM. ARDEN BRANCH LANE |
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, 11.2 hours before the alert went out and 125 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.
- Mixed-layer CAPE
- 305 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 814 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 68 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
085
WGUS52 KRAH 082309
FFWRAH
NCC183-090200-
/O.NEW.KRAH.FF.W.0047.120908T2309Z-120909T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE RALEIGH NC
709 PM EDT SAT SEP 8 2012
THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A
* FLASH FLOOD WARNING FOR...
WAKE COUNTY IN CENTRAL NORTH CAROLINA
* UNTIL 1000 PM EDT
* AT 702 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAIN PRODUCING FLOODING OVER WAKE
COUNTY. DOPPLER RADAR ESTIMATED THAT AS MUCH AS 1 TO 2 INCHES OF
RAIN HAS FALLEN OVER PORTIONS OF CENTRAL WAKE COUNTY.
* LOCATIONS THREATENED WITH FLOODING INCLUDE APEX... RALEIGH...
GARNER... AND CARY... INCLUDING SWIFT CREEK AND CRABTREE
CREEK.
AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL ARE STILL POSSIBLE RESULTING
IN ADDITIONAL FLOODING.
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.
PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.
&&
LAT...LON 3593 7836 3591 7835 3590 7831 3585 7827
3581 7827 3574 7838 3571 7847 3563 7857
3559 7864 3558 7872 3564 7898 3587 7891
3587 7883 3590 7882 3592 7874
$$
773 follow-up statements
337
WGUS72 KRAH 082346
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
746 PM EDT SAT SEP 8 2012
NCC183-090200-
/O.CON.KRAH.FF.W.0047.000000T0000Z-120909T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAKE NC-
746 PM EDT SAT SEP 8 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR WAKE
COUNTY...
AT 734 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE THUNDERSTORMS WITH VERY HEAVY RAIN OVER PORTIONS OF WAKE
COUNTY. DOPPLER RADAR ESTIMATED THAT AS MUCH AS TWO TO TWO AND A
HALF INCHES OF RAIN HAS FALLEN OVER PORTIONS OF THE WARNED AREA.
FLASH FLOODING HAS BEEN REPORTED AT THE INTERSECTION OF HODGES
STREET AND ATLANTIC AVENUE.
LOCATIONS THREATENED WITH FLOODING INCLUDE APEX... RALEIGH...
GARNER... AND CARY... INCLUDING SWIFT CREEK AND CRABTREE CREEK.
AN ADDITIONAL ONE TO TWO INCHES OF RAINFALL ARE STILL POSSIBLE
RESULTING IN ADDITIONAL FLOODING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. DO NOT DRIVE
YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD. MANY ROADS AND
INTERSECTIONS IN THE AREA WILL QUICKLY FLOOD. WHEN ENCOUNTERING
FLOODED ROADS TURN AROUND...DONT DROWN.
PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT
SATURDAY EVENING FOR CENTRAL NORTH CAROLINA.
&&
LAT...LON 3591 7835 3589 7830 3585 7827 3581 7827
3574 7840 3571 7847 3563 7857 3559 7864
3558 7872 3564 7898 3583 7892 3584 7888
3593 7851 3593 7836
$$
77000
WGUS72 KRAH 090110
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
910 PM EDT SAT SEP 8 2012
NCC183-090200-
/O.CON.KRAH.FF.W.0047.000000T0000Z-120909T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAKE NC-
910 PM EDT SAT SEP 8 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1000 PM EDT FOR WAKE
COUNTY...
AT 905 PM EDT...LOCAL LAW ENFORCEMENT REPORTED SEVERAL ROADS ACROSS
THE CITY OF RALEIGH REMAINED CLOSED DUE TO HIGH WATER. DOPPLER RADAR
ESTIMATED THAT AS MUCH AS 3 INCHES INCHES OF RAIN HAS FALLEN OVER
PORTIONS OF WAKE COUNTY. ALTHOUGH THE RAINFALL HAS GENERALLY ENDED
ACROSS THE COUNTY THE FLASH FLOOD WARNING WILL CONTINUE DUE TO THE
ONGOING FLASH FLOODING.
FLASH FLOODING HAS BEEN REPORTED AT THE INTERSECTION OF HODGES
STREET AND ATLANTIC AVENUE... AVENT FERRY ROAD AT TRAILWOOD ROAD...
AND LAKE BOONE TRAIL AT HORTON STREET.
LOCATIONS THREATENED WITH CONTINUED FLOODING INCLUDE APEX...
RALEIGH... AND CARY.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. BE ESPECIALLY
CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF
FLOODING.
PLEASE REPORT FLOODING TO THE NATIONAL WEATHER SERVICE BY CALLING...
1...8 7 7...6 3 3...6 7 7 2 OR NOTIFY YOUR LOCAL LAW ENFORCEMENT
AGENCY.
&&
LAT...LON 3591 7835 3589 7830 3585 7827 3581 7827
3574 7840 3571 7847 3563 7857 3559 7864
3558 7872 3564 7898 3583 7892 3584 7888
3593 7851 3593 7836
$$
77761
WGUS72 KRAH 090159
FFSRAH
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE RALEIGH NC
959 PM EDT SAT SEP 8 2012
NCC183-090206-
/O.EXP.KRAH.FF.W.0047.000000T0000Z-120909T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WAKE NC-
959 PM EDT SAT SEP 8 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 1000 PM EDT FOR WAKE
COUNTY...
FLASH FLOODING HAS ENDED ACROSS WAKE COUNTY AND LAW ENFORCEMENT HAS
REPORTED ALL FLOODED ROADS HAVE BEEN REOPENED.
LAT...LON 3591 7835 3589 7830 3585 7827 3581 7827
3574 7840 3571 7847 3563 7857 3559 7864
3558 7872 3564 7898 3583 7892 3584 7888
3593 7851 3593 7836
$$
77The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 8, 2:09 PM EDT | Severe Thunderstorm Warning | RAH | Forsyth | 66 min |
| Sep 8, 3:11 PM EDT | Severe Thunderstorm Warning | RAH | Forsyth, Guilford | 64 min |
| Sep 8, 3:27 PM EDT | Special Weather Statement | RAH | Davidson | 63 min |
| Sep 8, 3:28 PM EDT | Special Weather Statement | RAH | Alamance | 62 min |
| Sep 8, 3:31 PM EDT | Special Weather Statement | RAH | Anson | 59 min |
| Sep 8, 3:41 PM EDT | Special Weather Statement | RAH | Johnston | 49 min |
| Sep 8, 3:57 PM EDT | Special Weather Statement | RAH | Durham, Orange | 63 min |
| Sep 8, 4:01 PM EDT | Severe Thunderstorm Warning | RAH | Alamance, Guilford | 38 min |
| Sep 8, 4:07 PM EDT | Special Weather Statement | RAH | Person | 53 min |
| Sep 8, 4:32 PM EDT | Special Weather Statement | RAH | Davidson | 43 min |
| Sep 8, 4:40 PM EDT | Special Weather Statement | RAH | Person | 65 min |
| Sep 8, 4:41 PM EDT | Special Weather Statement | RAH | Anson, Richmond | 64 min |
| Sep 8, 4:52 PM EDT | Special Weather Statement | RAH | Randolph | 53 min |
| Sep 8, 4:57 PM EDT | Special Weather Statement | RAH | Stanly | 48 min |
| Sep 8, 5:02 PM EDT | Special Weather Statement | RAH | Orange | 58 min |
| Sep 8, 5:11 PM EDT | Severe Thunderstorm Warning | RAH | Davidson, Montgomery, Randolph, Stanly | 64 min |
| Sep 8, 5:27 PM EDT | Special Weather Statement | RAH | Chatham | 63 min |
| Sep 8, 5:37 PM EDT | Severe Thunderstorm Warning | RAH | Durham, Orange | 26 min |
| Sep 8, 5:44 PM EDT | Special Weather Statement | RAH | Warren | 46 min |
| Sep 8, 5:58 PM EDT | Special Weather Statement | RAH | Granville | 62 min |
| Sep 8, 6:07 PM EDT | Severe Thunderstorm Warning | RAH | Chatham, Moore, Randolph | 38 min |
| Sep 8, 6:22 PM EDT | Special Weather Statement | RAH | Wake | 53 min |
| Sep 8, 6:37 PM EDT | Special Weather Statement | RAH | Warren | 53 min |
| Sep 8, 6:42 PM EDT | Severe Thunderstorm Warning | RAH | Chatham, Lee, Moore | 48 min |
| Sep 8, 6:46 PM EDT | Special Weather Statement | RAH | Franklin | 59 min |
| Sep 8, 6:58 PM EDT | Areal Flood Advisory | RAH | Chatham, Wake | 85 min |
| Sep 8, 7:18 PM EDT | Severe Thunderstorm Warning | RAH | Franklin, Nash | 32 min |
| Sep 8, 7:30 PM EDT | Special Weather Statement | RAH | Wake | 60 min |
| Sep 8, 7:43 PM EDT | Special Weather Statement | RAH | Halifax | 92 min |
| Sep 8, 7:58 PM EDT | Special Weather Statement | RAH | Edgecombe, Nash, Wilson | 62 min |
Nearby
Flash Flood Warnings in North Carolina, 2012Every flash flood warning in 2012
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.