Alert archive / North Carolina / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 465, NWS Raleigh, NC

October 1, 20085 counties in North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Oct 1, 2008, 3:20 AM EDT for 5 counties in North Carolina. It was in force for 34 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: Oct 1, 2008, 3:20 AM EDT (07:20 UTC)
Expired: Oct 1, 2008, 3:54 AM EDT
In force: 34 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Franklin County, NC, Johnston County, NC, Nash County, NC, Wake County, NC, Wilson County, NC

The radar

The Raleigh/Durham radar (KRAX), 28 km from the middle of the area, began a volume at 07:21 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, 7.3 hours before the alert went out and 152 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: 1450 J/kg
Mixed-layer CIN: -7 J/kg
Mixed-layer LCL: 948 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 38 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.6

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 Oct 1, 3:03 AM EDT, 17 minutes earlier.

Area forecast discussion, Oct 1, 3:03 AM EDT, 17 minutes before

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Hazardous weather outlook, Sep 30, 11:56 PM EDT, 3 hours 24 minutes before

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In the hours before

Special weather statement, Sep 30, 11:34 PM EDT, 3 hours 46 minutes before

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Special weather statement, Sep 30, 11:37 PM EDT, 3 hours 43 minutes before

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Special weather statement, Oct 1, 12:27 AM EDT, 2 hours 53 minutes before

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Special weather statement, Oct 1, 12:31 AM EDT, 2 hours 49 minutes before

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Special weather statement, Oct 1, 2:11 AM EDT, 1 hour 9 minutes before

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Special weather statement, Oct 1, 2:37 AM EDT, 43 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
Sep 30, 8:35 PM EDT	Severe Thunderstorm Warning	RAH	Davidson	40 min
Sep 30, 9:15 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Montgomery, Randolph, Stanly	45 min
Sep 30, 9:34 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Guilford	41 min
Sep 30, 9:47 PM EDT	Severe Thunderstorm Warning	RAH	Davidson, Randolph	43 min
Sep 30, 10:24 PM EDT	Severe Thunderstorm Warning	RAH	Alamance, Guilford	27 min
Sep 30, 10:30 PM EDT	Severe Thunderstorm Warning	RAH	Randolph	45 min
Oct 1, 2:20 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Harnett, Johnston, Sampson	40 min
Oct 1, 2:25 PM EDT	Tornado Warning	RAH	Cumberland, Harnett, Sampson	35 min
Oct 1, 2:59 PM EDT	Severe Thunderstorm Warning	RAH	Johnston, Sampson, Wayne	34 min
Oct 1, 3:08 PM EDT	Tornado Warning	RAH	Johnston, Sampson, Wayne	52 min
Oct 1, 3:18 PM EDT	Areal Flood Advisory	RAH	Cumberland	55 min
Oct 1, 3:45 PM EDT	Tornado Warning	RAH	Wayne	18 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.