Alert archive / North Carolina / Flash Flood Warnings in 1999
Flash Flood Warning 5, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood warning at Aug 26, 1999, 7:03 AM EDT for Franklin County, Wake County, North Carolina. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 26, 1999, 7:03 AM EDT (11:03 UTC)
- Expired
- Aug 26, 1999, 10:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS Raleigh, NC
- Area
- Whole counties
Counties Franklin County, NC, Wake County, NC
The radar
The Raleigh/Durham radar (KRAX), 30 km from the middle of the area, began a volume at 11:07 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
Greensboro/Hi Pt, NC (KGSO), launched 00:00Z, 11.1 hours before the alert went out and 130 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
- 1009 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 990 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 74 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KRDU 261106 COR FFWRDU NCC069-183-261400- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING....CORRECTED... NATIONAL WEATHER SERVICE RALEIGH NC 703 AM EDT THU AUG 26 1999 THE NATIONAL WEATHER SERVICE IN RALEIGH HAS ISSUED A * FLASH FLOOD WARNING FOR... FRANKLIN COUNTY IN NORTH CAROLINA NORTHERN WAKE COUNTY IN NORTH CAROLINA * UNTIL 1000 AM EDT * AT 650 AM EDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN FROM LOUISBURG SOUTHWEST ACROSS WAKE FOREST TO RALEIGH... MOVING NORTHEAST AROUND 30 MPH. * A SECOND ROUND OF HEAVY RAIN PRODUCING THUNDERSTORMS IS MOVING ACROSS NORTHERN WAKE AND FRANKLIN COUNTIES. RADAR ESTIMATES THAT UP TO 6 INCHES OF RAIN HAVE FALLEN IN SOME AREAS OF SOUTHERN FRANKLIN COUNTY. THIS SECOND ROUND OF STORMS WILL CAUSE SMALLER STREAMS TO FLOOD. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! ...CORRECTED FOR FLASH FLOOD WARNING IN EFFECT FOR ALL OF FRANKL0IN COUNTY.... MLM/RA
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Raleigh, NC wrote its last area forecast discussion before this flash flood warning went out at Aug 26, 1:47 AM EDT, 5 hours 16 minutes earlier.
Area forecast discussion, Aug 26, 1:47 AM EDT, 5 hours 16 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RALEIGH NC 147 AM EDT THU AUG 26 1999 SHORT TERM.... CONVECTION CONTINUING ACROSS NORTHERN TIER COUNTIES OF CWA. THIS ACTIVITY FIRING ALONG VORT SPOKE AHEAD OF MAIN SYSTEM. EXPECT THIS TO DIMINISH/END BEFORE PRESS TIME. MODELS IN GENERAL AGREEMENT IN SLOWLY MOVING CLOSED UPPER LOW NORTHEAST DURING THIS PERIOD WITH LOW BECOMING OPEN WAVE 36-48 HOURS. AS UPPER LOW ROTATES AND MOVE NORTHEAST...DRY AIR FILTERING IN MID/UPPER LEVELS OVER THE AREA...ABOVE 700 MB. BUT LOW LEVELS REMAIN QUITE MOIST AND FAIRLY UNSTABLE. DECENT AMOUNT OF PVA/OMEGA MOVING IN THIS AFTERNOON ALONG WITH FRONTAL BOUNDARY APPROACHING CWA AND AFTERNOON HEATING. ALL THIS COMBINED WILL WARRANT A CHANCE FOR TSTM ACTIVITY TODAY. MAY NUDGE POPS UP A TAD EVENTHOUGH BOTH MOS GUIDANCE HAVE LOWER POPS IN THE WEST. TONIGHT/FRIDAY.... CONTINUED CHANCE FOR SCATTERED CONVECTION. ANOTHER SPOKE OF VORT WILL MOVE ACROSS TONIGHT. THUS CURRENT 30 PERCENTS LOOKS GOOD. LESSER CHANCE FOR FRIDAY AS UPPER SYSTEM PULLS AWAY BUT MINOR RIPPLE TO MOVE THROUGH. ALSO FRONTAL BOUNDARY IN AREA AND AFTERNOON HEATING WILL BE ENOUGH TO KEEP IN A SMALL CHANCE. TEMPERATURES....LOW TO MID 80S TODAY. WARMER FRIDAY AS BETWEEN SYSTEMS AND LESSER CHANCE FOR TSTMS. EXTENDED...STILL SOME UNCERTAINITY AS DEPENDANT UPON WHETHER/HOW CLOSE DENNIS WILL APPROACH MID ATLC COAST. THIS WILL DEPEND ON UPPER TROUGH AS WHETHER IT WILL BE STRONG ENOUGH TO KEEP AWAY OR WEAKEN AND DENNIS MOVE CLOSER TO SOUTHEAST MID ATLC COAST. AGAIN NGM TOO FAST AND TENDS TO WASH SYSTEM OUT BY END OF PERIOD...AVN/ETA MORE REALISTIC AS STORM MOVING VERY SLOW. FOR NOW WILL KEEP A CHANCE OF SCATTERED CONVECTION IN THROUGH THE PERIOD. ENJOY THE DAY. .RAH...NONE. RA
The office that day
Everything else NWS Raleigh, NC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 10:20 PM EDT | Severe Thunderstorm Warning | RAH | Vance | 35 min |
| Aug 26, 7:36 AM EDT | Flash Flood Warning | RAH | Halifax, Nash | 3 hr |
| Aug 26, 2:58 PM EDT | Severe Thunderstorm Warning | RAH | Wilson | 32 min |
| Aug 26, 4:19 PM EDT | Severe Thunderstorm Warning | RAH | Harnett | 36 min |
| Aug 26, 4:44 PM EDT | Severe Thunderstorm Warning | RAH | Harnett | 21 min |
| Aug 26, 4:58 PM EDT | Severe Thunderstorm Warning | RAH | Moore | 32 min |
| Aug 26, 5:22 PM EDT | Severe Thunderstorm Warning | RAH | Franklin | 33 min |
| Aug 26, 5:25 PM EDT | Severe Thunderstorm Warning | RAH | Moore | 35 min |
| Aug 26, 5:34 PM EDT | Severe Thunderstorm Warning | RAH | Warren | 31 min |
| Aug 26, 6:10 PM EDT | Severe Thunderstorm Warning | RAH | Harnett | 35 min |
Nearby
Flash Flood Warnings in North Carolina, 1999Every flash flood warning in 1999
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.