Alert archive / North Carolina / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 122, NWS Raleigh, NC

May 11, 20084 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at May 11, 2008, 10:06 PM EDT for 4 counties in North Carolina. It was in force for 54 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: May 11, 2008, 10:06 PM EDT (02:06 UTC)
Expired: May 11, 2008, 11:00 PM EDT
In force: 54 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Harnett County, NC, Johnston County, NC, Wayne County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 27 km from the middle of the area, began a volume at 02:09 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
May 11, 7:47 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Newport, NC (KMHX), launched 00:00Z, 2.1 hours before the alert went out and 150 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: 628 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1382 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: 328 m²/s²
0-3 km storm-relative helicity: 369 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 8.3

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 May 11, 8:19 PM EDT, 1 hour 47 minutes earlier.

Area forecast discussion, May 11, 8:19 PM EDT, 1 hour 47 minutes before

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Hazardous weather outlook, May 11, 8:04 PM EDT, 2 hours 2 minutes before

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In the hours before

Local storm report, May 11, 7:20 PM EDT, 2 hours 46 minutes before

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Local storm report, May 11, 9:03 PM EDT, 1 hour 3 minutes before

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Special weather statement, May 11, 9:12 PM EDT, 54 minutes before

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Local storm report, May 11, 9:44 PM EDT, 22 minutes before

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Special weather statement, May 11, 9:51 PM EDT, 15 minutes before

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Local storm report, May 11, 9:52 PM EDT, 14 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
May 11, 8:34 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Chatham, Davidson, Guilford, Randolph	41 min
May 12, 4:06 AM EDT	Wind Advisory	RAH	Davidson, Forsyth, Guilford, Person, Randolph	11 hr

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.