Alert archive / North Carolina / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 391, NWS Raleigh, NC

July 31, 2008Sampson County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 31, 2008, 6:08 PM EDT for Sampson County, North Carolina. It was in force for 52 min. 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, 2008, 6:08 PM EDT (22:08 UTC)
Expired: Jul 31, 2008, 7:00 PM EDT
In force: 52 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

County Sampson County, NC

The radar

The Raleigh/Durham radar (KRAX), 76 km from the middle of the area, began a volume at 22:10 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jul 31, 1:53 PM EDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Newport, NC (KMHX), launched 12:00Z, 10.1 hours before the alert went out and 138 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: 1212 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 993 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 79 m²/s²
0-3 km storm-relative helicity: 94 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 severe thunderstorm 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 severe thunderstorm warning went out at Jul 31, 4:25 PM EDT, 1 hour 43 minutes earlier.

Area forecast discussion, Jul 31, 4:25 PM EDT, 1 hour 43 minutes before

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Hazardous weather outlook, Jul 31, 5:55 PM EDT, 13 minutes before

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In the hours before

Local storm report, Jul 31, 4:53 PM EDT, 1 hour 15 minutes before

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Special weather statement, Jul 31, 5:00 PM EDT, 1 hour 8 minutes before

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Local storm report, Jul 31, 5:02 PM EDT, 1 hour 6 minutes before

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Local storm report, Jul 31, 5:38 PM EDT, 30 minutes before

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Local storm report, Jul 31, 5:54 PM EDT, 14 minutes before

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Local storm report, Jul 31, 6:02 PM EDT, 6 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, 1:40 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Forsyth	50 min
Jul 31, 2:16 PM EDT	Severe Thunderstorm Warning	RAH	Person	44 min
Jul 31, 2:37 PM EDT	Severe Thunderstorm Warning	RAH	Granville	38 min
Jul 31, 3:02 PM EDT	Severe Thunderstorm Warning	RAH	Vance	43 min
Jul 31, 3:20 PM EDT	Severe Thunderstorm Warning	RAH	Warren	40 min
Jul 31, 3:29 PM EDT	Severe Thunderstorm Warning	RAH	Chatham, Harnett, Lee	46 min
Jul 31, 3:31 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Johnston, Sampson	44 min
Jul 31, 3:51 PM EDT	Severe Thunderstorm Warning	RAH	Franklin, Halifax, Nash	54 min
Jul 31, 3:53 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Stanly	30 min
Jul 31, 3:56 PM EDT	Severe Thunderstorm Warning	RAH	Anson, Richmond	49 min
Jul 31, 4:15 PM EDT	Severe Thunderstorm Warning	RAH	Harnett, Johnston	29 min
Jul 31, 4:19 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Wilson	41 min
Jul 31, 4:22 PM EDT	Severe Thunderstorm Warning	RAH	Harnett, Lee, Moore	38 min
Jul 31, 4:26 PM EDT	Areal Flood Advisory	RAH	Anson, Richmond, Scotland	2 hr
Jul 31, 4:38 PM EDT	Severe Thunderstorm Warning	RAH	Edgecombe, Halifax	36 min
Jul 31, 4:40 PM EDT	Severe Thunderstorm Warning	RAH	Hoke, Scotland	50 min
Jul 31, 4:46 PM EDT	Severe Thunderstorm Warning	RAH	Richmond	44 min
Jul 31, 5:17 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Sampson	43 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2008 Every severe thunderstorm warning in 2008

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.