Alert archive / North Carolina / Flash Flood Watches in 2014

Flash Flood Watch 4, NWS Raleigh, NC

September 8, 201423 counties in North Carolina

NWS Raleigh, NC issued this flash flood watch at Sep 8, 2014, 9:49 AM EDT for 23 counties in North Carolina. It took effect at Sep 8, 2014, 10:00 AM EDT. It was in force for 18 hr.

The area

The counties it named.

The facts

Issued: Sep 8, 2014, 9:49 AM EDT (13:49 UTC)
In effect from: Sep 8, 2014, 10:00 AM EDT
Expired: Sep 9, 2014, 3:39 AM EDT
In force: 18 hr
Issued by: NWS Raleigh, NC
Flood severity: None

All 23 counties

Chatham County, NC, Cumberland County, NC, Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Halifax County, NC, Harnett County, NC, Hoke County, NC, Johnston County, NC, Lee County, NC, Moore County, NC, Nash County, NC, Orange County, NC, Person County, NC, Richmond County, NC, Sampson County, NC, Scotland County, NC, Vance County, NC, Wake County, NC, Warren County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 15 km from the middle of the area, began a volume at 13:50 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, 1.8 hours before the alert went out and 120 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 543 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 242 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 watch went out at Sep 8, 7:20 AM EDT, 2 hours 29 minutes earlier.

Area forecast discussion, Sep 8, 7:20 AM EDT, 2 hours 29 minutes before

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Hazardous weather outlook, Sep 8, 4:00 AM EDT, 5 hours 49 minutes before

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In the hours before

Special weather statement, Sep 8, 5:48 AM EDT, 4 hours 1 minute before

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Special weather statement, Sep 8, 7:26 AM EDT, 2 hours 23 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 8, 5:48 AM EDT	Special Weather Statement	RAH	Cumberland, Edgecombe, Franklin, Granville, Halifax, Harnett and 12 more	57 min
Sep 8, 7:26 AM EDT	Special Weather Statement	RAH	Chatham, Cumberland, Durham, Edgecombe, Franklin, Granville and 16 more	79 min
Sep 8, 3:37 PM EDT	Areal Flood Advisory	RAH	Franklin, Harnett, Johnston, Nash, Wake, Warren	3 hr
Sep 8, 4:42 PM EDT	Flash Flood Warning	RAH	Johnston, Wake, Wayne, Wilson	11 hr
Sep 8, 5:22 PM EDT	Flash Flood Warning	RAH	Franklin, Halifax, Nash, Warren	12 hr
Sep 8, 5:49 PM EDT	Areal Flood Advisory	RAH	Sampson	3 hr
Sep 8, 6:10 PM EDT	Flash Flood Warning	RAH	Sampson	4 hr
Sep 8, 6:18 PM EDT	Areal Flood Advisory	RAH	Halifax	3 hr

Nearby

Flash Flood Watches in North Carolina, 2014 Every flash flood watch in 2014

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.