Alert archive / North Carolina / Flash Flood Watches in 2020

Flash Flood Watch 1, NWS Wilmington, NC

May 19, 20206 counties in North Carolina; 5 counties in South Carolina

NWS Wilmington, NC issued this flash flood watch at May 19, 2020, 3:16 PM EDT for 6 counties in North Carolina; 5 counties in South Carolina. It was in force for 61 hr.

The area

The counties it named.

The facts

Issued: May 19, 2020, 3:16 PM EDT (19:16 UTC)
Expired: May 22, 2020, 4:00 AM EDT
In force: 61 hr
Issued by: NWS Wilmington, NC
Flood severity: None

Counties Bladen County, NC, Brunswick County, NC, Columbus County, NC, New Hanover County, NC, Pender County, NC, Robeson County, NC, Darlington County, SC, Dillon County, SC, Florence County, SC, Marion County, SC, Marlboro County, SC

The radar

The Wilmington radar (KLTX), 61 km from the middle of the area, began a volume at 19:18 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, 7.3 hours before the alert went out and 213 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: 1 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 486 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 238 m²/s²
0-3 km storm-relative helicity: 311 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

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 Wilmington, NC wrote its last area forecast discussion before this flash flood watch went out at May 18, 7:48 PM EDT, 19 hours 28 minutes earlier.

Area forecast discussion, May 18, 7:48 PM EDT, 19 hours 28 minutes before

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Hazardous weather outlook, May 18, 5:28 PM EDT, 21 hours 48 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 18, 8:30 PM EDT	Special Weather Statement	ILM	Columbus	45 min
May 18, 9:22 PM EDT	Special Weather Statement	ILM	Bladen	38 min
May 18, 10:00 PM EDT	Special Weather Statement	ILM	Bladen	45 min
May 19, 4:28 AM EDT	Special Marine Warning	ILM		47 min
May 19, 6:03 AM EDT	Special Marine Warning	ILM		27 min
May 19, 6:33 AM EDT	Special Marine Warning	ILM		14 min
May 19, 3:16 PM EDT	Small Craft Advisory	ILM		69 hr
May 19, 11:29 AM EDT	River Flood Warning	ILM	Florence, Marion	22 days
May 19, 11:29 AM EDT	River Flood Warning	ILM	Darlington, Florence	21 days

Nearby

Flash Flood Watches in North Carolina, 2020 Flash Flood Watches in South Carolina, 2020 Every flash flood watch in 2020

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.