Alert archive / North Carolina / Flash Flood Warnings in 2019

Flash Flood Warning 17, NWS Raleigh, NC

July 31, 2019Guilford County, North Carolina

NWS Raleigh, NC issued this flash flood warning at Jul 31, 2019, 7:22 PM EDT for Guilford County, North Carolina. It was in force for 9 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 31, 2019, 7:22 PM EDT (23:22 UTC)
Expired: Aug 1, 2019, 4:02 AM EDT
In force: 9 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

County Guilford County, NC

The radar

The Roanoke radar (KFCX), 114 km from the middle of the area, began a volume at 23:24 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

Roanoke, VA (KRNK), launched 12:00Z, 11.4 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: 7 J/kg
Mixed-layer CIN: -188 J/kg
Mixed-layer LCL: 1412 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: -5 m²/s²
0-3 km storm-relative helicity: 9 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 warning 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 warning went out at Jul 31, 3:20 PM EDT, 4 hours 2 minutes earlier.

Area forecast discussion, Jul 31, 3:20 PM EDT, 4 hours 2 minutes before

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Hazardous weather outlook, Jul 31, 2:35 PM EDT, 4 hours 47 minutes before

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In the hours before

Special weather statement, Jul 31, 5:15 PM EDT, 2 hours 7 minutes before

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Special weather statement, Jul 31, 5:38 PM EDT, 1 hour 44 minutes before

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Special weather statement, Jul 31, 5:53 PM EDT, 1 hour 29 minutes before

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Special weather statement, Jul 31, 6:14 PM EDT, 1 hour 8 minutes before

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Special weather statement, Jul 31, 6:27 PM EDT, 55 minutes before

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Special weather statement, Jul 31, 6:47 PM EDT, 35 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
Jul 31, 1:42 PM EDT	Special Weather Statement	RAH	Richmond	63 min
Jul 31, 2:24 PM EDT	Special Weather Statement	RAH	Chatham	51 min
Jul 31, 3:24 PM EDT	Special Weather Statement	RAH	Durham	51 min
Jul 31, 3:40 PM EDT	Special Weather Statement	RAH	Richmond	65 min
Jul 31, 3:43 PM EDT	Severe Thunderstorm Warning	RAH	Anson	29 min
Jul 31, 3:46 PM EDT	Special Weather Statement	RAH	Vance	44 min
Jul 31, 4:06 PM EDT	Areal Flood Advisory	RAH	Durham, Granville, Wake	108 min
Jul 31, 4:22 PM EDT	Areal Flood Advisory	RAH	Chatham	113 min
Jul 31, 4:42 PM EDT	Special Weather Statement	RAH	Scotland	48 min
Jul 31, 4:44 PM EDT	Special Weather Statement	RAH	Guilford	46 min
Jul 31, 4:51 PM EDT	Special Weather Statement	RAH	Chatham	24 min
Jul 31, 5:15 PM EDT	Special Weather Statement	RAH	Randolph	45 min
Jul 31, 5:32 PM EDT	Areal Flood Advisory	RAH	Guilford	118 min
Jul 31, 5:38 PM EDT	Special Weather Statement	RAH	Montgomery, Stanly	52 min
Jul 31, 5:53 PM EDT	Special Weather Statement	RAH	Anson	67 min
Jul 31, 6:14 PM EDT	Special Weather Statement	RAH	Alamance	46 min
Jul 31, 6:27 PM EDT	Special Weather Statement	RAH	Richmond	33 min
Jul 31, 6:47 PM EDT	Special Weather Statement	RAH	Guilford	43 min
Jul 31, 7:34 PM EDT	Special Weather Statement	RAH	Guilford	56 min

Nearby

Flash Flood Warnings in North Carolina, 2019 Every flash flood warning in 2019

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.