Alert archive / North Carolina / Flash Flood Warnings in 2012
Flash Flood Warning 17, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Jul 9, 2012, 10:42 PM EDT for Guilford County, North Carolina. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 9, 2012, 10:42 PM EDT (02:42 UTC)
- Expired
- Jul 10, 2012, 12:49 AM EDT
- In force
- 2 hr
- Issued by
- NWS Raleigh, NC
- Area
- Storm-based polygon
- Flood severity
- None
County Guilford County, NC
The radar
The Roanoke radar (KFCX), 114 km from the middle of the area, began a volume at 02:43 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.
The nearest sounding before it
Roanoke, VA (KRNK), launched 00:00Z, 2.7 hours before the alert went out and 131 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
- 440 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 900 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -35 m²/s²
- 0-3 km storm-relative helicity
- 28 m²/s²
- Significant tornado parameter
- -0.1
- Supercell composite
- -1.1
The text
As transmitted, in the capitals the NWS used until 2016.
371 WGUS52 KRAH 100242 FFWRAH NCC081-100545- /O.NEW.KRAH.FF.W.0017.120710T0242Z-120710T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE RALEIGH NC 1042 PM EDT MON JUL 9 2012 THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A * FLASH FLOOD WARNING FOR... GUILFORD COUNTY IN CENTRAL NORTH CAROLINA * UNTIL 145 AM EDT * AT 1037 PM EDT...LOCAL LAW ENFORCEMENT REPORTED THUNDERSTORMS THAT WERE CONTINUOUSLY REDEVELOPING AND PRODUCING FLOODING OVER CENTRAL GUILFORD COUNTY. FLASH FLOODING CURRENTLY ONGOING HAS CLOSED I-40 WESTBOUND AT HIGHWAY 68 IN GREENSBORO. LIGHT TO MODERATE SHOWERS WILL CONTINUE FOR THE NEXT HOUR OR SO. * LOCATIONS THREATENED WITH FLOODING INCLUDE GREENSBORO. 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. NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROAD. AS LITTLE AS 6 INCHES OF WATER CAN CAUSE YOU TO LOSE CONTROL OF YOUR VEHICLE. TWO FEET OF RUSHING WATER CAN CARRY AWAY MOST VEHICLES INCLUDING SPORT UTILITY VEHICLES AND PICKUP TRUCKS. 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 3599 7972 3599 8001 3616 8002 3615 7973 $$ ELLIS
2 follow-up statements
059 WGUS72 KRAH 100402 FFSRAH FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RALEIGH NC 1202 AM EDT TUE JUL 10 2012 NCC081-100545- /O.CON.KRAH.FF.W.0017.000000T0000Z-120710T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GUILFORD NC- 1202 AM EDT TUE JUL 10 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 AM EDT FOR CENTRAL GUILFORD COUNTY... AT 1155 PM EDT...THE HEAVY RAINFALL WAS DIMINISHING ACROSS GREENSBORO. WHILE AREA CREEKS AND STREAMS WERE BEGINNING TO RECEDE...WATER LEVELS WERE STILL HIGH AND WATER WAS FLOWING SWIFTLY. ONCE MOST CREEKS AND STREAMS RETURN TO THEIR BANKS...THE FLASH FLOOD WARNING WILL BE CANCELED. PRECAUTIONARY/PREPAREDNESS ACTIONS... EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS AND UNDERPASSES AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. && LAT...LON 3599 7972 3599 8001 3616 8002 3615 7973 $$ WSS
658 WGUS72 KRAH 100449 FFSRAH FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE RALEIGH NC 1249 AM EDT TUE JUL 10 2012 NCC081-100505- /O.CAN.KRAH.FF.W.0017.000000T0000Z-120710T0545Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ GUILFORD NC- 1249 AM EDT TUE JUL 10 2012 ...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CENTRAL GUILFORD COUNTY... AT 1241 AM EDT...THE VERY HEAVY RAINFALL THAT OCCURRED MONDAY EVENING HAS DISSIPATED AND CREEKS AND STREAMS HAVE RETURNED TO THEIR BANKS. SINCE THE THREAT OF FLASH FLOODING HAS ENDED...THE FLASH FLOOD WARNING HAS BEEN CANCELED. GUILFORD COUNTY OFFICIALS REPORT I-40 WESTBOUND HAS REOPENED AS WELL AS OTHER STREETS THAT WERE CLOSED EARLIER DUE TO HIGH WATER. LAT...LON 3599 7972 3599 8001 3616 8002 3615 7973 $$ WSS
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 8:08 PM EDT | Special Weather Statement | RAH | Alamance, Davidson, Durham, Guilford, Orange, Vance and 1 more | 52 min |
| Jul 9, 8:15 PM EDT | Areal Flood Advisory | RAH | Franklin, Halifax, Nash, Warren | 2 hr |
| Jul 9, 8:46 PM EDT | Special Weather Statement | RAH | Edgecombe, Franklin, Halifax, Nash, Wilson | 59 min |
| Jul 9, 8:57 PM EDT | Special Weather Statement | RAH | Alamance, Chatham, Davidson, Durham, Guilford, Lee and 3 more | 93 min |
| Jul 9, 9:28 PM EDT | Areal Flood Advisory | RAH | Chatham, Randolph | 75 min |
| Jul 9, 10:49 PM EDT | Special Weather Statement | RAH | Harnett | 56 min |
| Jul 10, 12:58 PM EDT | Special Weather Statement | RAH | Alamance, Durham, Franklin, Orange | 47 min |
| Jul 10, 2:24 PM EDT | Special Weather Statement | RAH | Davidson | 66 min |
| Jul 10, 2:44 PM EDT | Areal Flood Advisory | RAH | Edgecombe, Nash, Wilson | 2 hr |
| Jul 10, 3:29 PM EDT | Special Weather Statement | RAH | Davidson | 61 min |
| Jul 10, 4:11 PM EDT | Special Weather Statement | RAH | Montgomery, Randolph | 64 min |
| Jul 10, 4:17 PM EDT | Areal Flood Advisory | RAH | Davidson | 2 hr |
| Jul 10, 5:09 PM EDT | Special Weather Statement | RAH | Montgomery, Moore | 66 min |
| Jul 10, 5:14 PM EDT | Severe Thunderstorm Warning | RAH | Montgomery, Moore, Richmond | 46 min |
| Jul 10, 5:22 PM EDT | Special Weather Statement | RAH | Anson | 53 min |
| Jul 10, 5:50 PM EDT | Areal Flood Advisory | RAH | Anson, Montgomery, Moore, Richmond, Stanly | 100 min |
| Jul 10, 6:10 PM EDT | Special Weather Statement | RAH | Cumberland | 65 min |
| Jul 10, 6:17 PM EDT | Special Weather Statement | RAH | Hoke, Moore | 58 min |
| Jul 10, 6:26 PM EDT | Special Weather Statement | RAH | Scotland | 64 min |
| Jul 10, 6:35 PM EDT | Areal Flood Advisory | RAH | Cumberland, Hoke, Sampson, Scotland | 3 hr |
| Jul 10, 6:45 PM EDT | Severe Thunderstorm Warning | RAH | Hoke, Scotland | 45 min |
| Jul 10, 7:10 PM EDT | Special Weather Statement | RAH | Anson | 50 min |
| Jul 10, 7:13 PM EDT | Flash Flood Warning | RAH | Cumberland | 3 hr |
| Jul 10, 7:31 PM EDT | Special Weather Statement | RAH | Cumberland | 59 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.