Alert archive / North Carolina / Flash Flood Watches in 2009
Flash Flood Watch 4, NWS Raleigh, NC
NWS Raleigh, NC issued this flash flood watch at Dec 1, 2009, 3:27 PM EST for 9 counties in North Carolina. It took effect at Dec 2, 2009, 12:00 PM EST. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Dec 1, 2009, 3:27 PM EST (20:27 UTC)
- In effect from
- Dec 2, 2009, 12:00 PM EST
- Expired
- Dec 2, 2009, 9:04 PM EST
- In force
- 9 hr
- Issued by
- NWS Raleigh, NC
- Flood severity
- None
Counties Alamance County, NC, Anson County, NC, Davidson County, NC, Forsyth County, NC, Guilford County, NC, Montgomery County, NC, Randolph County, NC, Richmond County, NC, Stanly County, NC
The radar
The Raleigh/Durham radar (KRAX), 131 km from the middle of the area, began a volume at 20:25 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 12:00Z, 8.5 hours before the alert went out and 54 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1975 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- -101 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
Nearby
Flash Flood Watches in North Carolina, 2009Every flash flood watch in 2009
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.