Alert archive / North Carolina / Flash Flood Warnings in 2024

Flash Flood Warning 26, NWS Raleigh, NC

July 24, 2024Alamance County, Guilford County, Orange County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 24, 2024, 11:43 PM EDT for Alamance County, Guilford 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: Jul 24, 2024, 11:43 PM EDT (03:43 UTC)
Expired: Jul 25, 2024, 2:15 AM EDT
In force: 3 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

Counties Alamance County, NC, Guilford County, NC, Orange County, NC

The nearest sounding before it

Roanoke, VA (KRNK), launched 00:00Z, 3.7 hours before the alert went out and 127 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: 132 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 927 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: -4 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

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
Jul 24, 10:35 PM EDT	Areal Flood Advisory	RAH	Franklin, Halifax, Nash, Warren	2 hr
Jul 24, 10:38 PM EDT	Special Weather Statement	RAH	Alamance	67 min
Jul 25, 12:01 AM EDT	Special Weather Statement	RAH	Guilford, Person	59 min
Jul 25, 11:44 AM EDT	Areal Flood Advisory	RAH	Alamance, Guilford, Orange, Randolph	2 hr
Jul 25, 12:23 PM EDT	Areal Flood Advisory	RAH	Franklin, Wake	4 hr
Jul 25, 12:36 PM EDT	Areal Flood Advisory	RAH	Edgecombe, Halifax, Nash	5 hr
Jul 25, 1:01 PM EDT	Areal Flood Advisory	RAH	Alamance, Chatham, Davidson, Durham, Montgomery, Orange and 2 more	3 hr
Jul 25, 2:16 PM EDT	Areal Flood Advisory	RAH	Chatham, Edgecombe, Franklin, Halifax, Harnett, Johnston and 5 more	96 min
Jul 25, 2:25 PM EDT	Flash Flood Warning Considerable damage threat	RAH	Wake	3 hr
Jul 25, 3:57 PM EDT	Areal Flood Advisory	RAH	Anson, Cumberland, Harnett, Hoke, Johnston, Lee and 6 more	2 hr
Jul 25, 5:04 PM EDT	Areal Flood Advisory	RAH	Cumberland, Edgecombe, Johnston, Sampson, Wayne, Wilson	3 hr
Jul 25, 5:55 PM EDT	Special Weather Statement	RAH	Sampson	80 min

Nearby

Flash Flood Warnings in North Carolina, 2024 Every flash flood warning in 2024

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.