Alert archive / North Carolina / Areal Flood Warnings in 2017

Areal Flood Warning 3, NWS Raleigh, NC

April 24, 20178 counties in North Carolina

NWS Raleigh, NC issued this areal flood warning at Apr 24, 2017, 9:50 PM EDT for 8 counties in North Carolina. It was in force for 14 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 24, 2017, 9:50 PM EDT (01:50 UTC)
Expired: Apr 25, 2017, 11:45 AM EDT
In force: 14 hr
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Flood severity: None

Counties Durham County, NC, Edgecombe County, NC, Franklin County, NC, Granville County, NC, Nash County, NC, Person County, NC, Vance County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 50 km from the middle of the area, began a volume at 01:51 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 00:00Z, 1.8 hours before the alert went out and 140 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: 0 J/kg
Mixed-layer LCL: 436 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 366 m²/s²
0-3 km storm-relative helicity: 354 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 areal 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 areal flood warning went out at Apr 24, 8:27 PM EDT, 1 hour 23 minutes earlier.

Area forecast discussion, Apr 24, 8:27 PM EDT, 1 hour 23 minutes before

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Hazardous weather outlook, Apr 24, 3:53 PM EDT, 5 hours 57 minutes before

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In the hours before

Special weather statement, Apr 24, 6:08 PM EDT, 3 hours 42 minutes before

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Local storm report, Apr 24, 9:01 PM EDT, 49 minutes before

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Local storm report, Apr 24, 9:06 PM EDT, 44 minutes before

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Local storm report, Apr 24, 9:09 PM EDT, 41 minutes before

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Local storm report, Apr 24, 9:14 PM EDT, 36 minutes before

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Local storm report, Apr 24, 9:32 PM EDT, 18 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE RALEIGH NC
932 PM EDT MON APR 24 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0919 PM     HEAVY RAIN       2 SSW APEX              35.70N  78.86W
04/24/2017  M4.10 INCH       WAKE               NC   TRAINED SPOTTER

            STORM TOTAL RAINFALL OF 4.10 INCHES.

&&

EVENT NUMBER RAH1700436

BSD

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 24, 8:07 PM EDT	Areal Flood Advisory	RAH	Edgecombe, Franklin, Granville, Nash, Person, Wilson	6 hr
Apr 24, 11:02 PM EDT	River Flood Warning	RAH	Johnston	5 days
Apr 24, 11:02 PM EDT	River Flood Warning	RAH	Johnston	61 hr
Apr 25, 1:12 AM EDT	Flash Flood Warning	RAH	Wake	6 hr
Apr 25, 1:16 AM EDT	Areal Flood Warning	RAH	Alamance, Chatham, Davidson, Forsyth, Guilford, Harnett and 3 more	6 hr
Apr 25, 6:33 AM EDT	Flash Flood Warning Emergency	RAH	Wake	4 hr
Apr 25, 7:38 AM EDT	Areal Flood Warning	RAH	Chatham, Orange	4 hr
Apr 25, 9:39 AM EDT	River Flood Warning	RAH	Edgecombe, Halifax, Nash	4 days
Apr 25, 9:47 AM EDT	River Flood Warning	RAH	Edgecombe	5 days
Apr 25, 10:54 AM EDT	River Flood Warning	RAH	Harnett	38 hr
Apr 25, 10:54 AM EDT	River Flood Warning	RAH	Cumberland	61 hr
Apr 25, 11:04 AM EDT	River Flood Warning	RAH	Wayne	10 days
Apr 25, 11:39 AM EDT	Areal Flood Warning	RAH	Chatham, Durham, Edgecombe, Franklin, Granville, Johnston and 6 more	24 hr

Nearby

Areal Flood Warnings in North Carolina, 2017 Every areal flood warning in 2017

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.