Alert archive / North Carolina / Flash Flood Warnings in 2023

Flash Flood Warning 2, NWS Raleigh, NC

April 7, 2023Durham County, Orange County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Apr 7, 2023, 11:11 AM EDT for Durham County, Orange 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: Apr 7, 2023, 11:11 AM EDT (15:11 UTC)
Expired: Apr 7, 2023, 2:15 PM EDT
In force: 3 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Durham County, NC, Orange County, NC

The radar

The Raleigh/Durham radar (KRAX), 63 km from the middle of the area, began a volume at 15:12 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

Newport, NC (KMHX), launched 12:00Z, 3.2 hours before the alert went out and 238 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: 5 J/kg
Mixed-layer CIN: -54 J/kg
Mixed-layer LCL: 833 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 56 m²/s²
0-3 km storm-relative helicity: 23 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 8:00 PM EDT	Special Weather Statement	RAH	Granville, Person	60 min
Apr 7, 1:25 AM EDT	Special Weather Statement	RAH	Warren	65 min
Apr 7, 6:42 AM EDT	Areal Flood Advisory	RAH	Harnett, Johnston, Wake	2 hr
Apr 7, 7:17 AM EDT	Flash Flood Warning Considerable damage threat	RAH	Harnett, Wake	3 hr
Apr 7, 7:45 AM EDT	Areal Flood Advisory	RAH	Chatham, Harnett, Lee, Wake	3 hr
Apr 7, 9:40 AM EDT	Areal Flood Advisory	RAH	Davidson, Randolph	3 hr
Apr 7, 9:51 AM EDT	Special Weather Statement	RAH	Durham	54 min
Apr 7, 10:14 AM EDT	Areal Flood Warning	RAH	Harnett, Wake	5 hr
Apr 7, 10:46 AM EDT	Areal Flood Advisory	RAH	Alamance, Chatham, Durham, Orange	3 hr
Apr 7, 2:12 PM EDT	Areal Flood Advisory	RAH	Durham, Orange	5 hr
Apr 7, 5:49 PM EDT	Areal Flood Advisory	RAH	Chatham, Orange	3 hr
Apr 7, 5:57 PM EDT	Areal Flood Warning	RAH	Durham, Orange	7 hr
Apr 7, 7:07 PM EDT	River Flood Warning	RAH	Chatham	11 hr

Nearby

Flash Flood Warnings in North Carolina, 2023 Every flash flood warning in 2023

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.