Alert archive / North Carolina / Special Weather Statements in 2011

Special Weather Statement, NWS Raleigh, NC

August 12, 2011Alamance County, North Carolina

NWS Raleigh, NC issued this special weather statement at Aug 12, 2011, 5:45 PM EDT for Alamance County, North Carolina. It was in force for 60 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 12, 2011, 5:45 PM EDT (21:45 UTC)
Expired: Aug 12, 2011, 6:45 PM EDT
In force: 60 min
Issued by: NWS Raleigh, NC

County Alamance County, NC

The radar

The Raleigh/Durham radar (KRAX), 89 km from the middle of the area, began a volume at 21:49 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 12:00Z, 9.8 hours before the alert went out and 56 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: 185 J/kg
Mixed-layer CIN: -156 J/kg
Mixed-layer LCL: 1130 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 37 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 12, 3:23 PM EDT, 2 hours 22 minutes earlier.

Area forecast discussion, Aug 12, 3:23 PM EDT, 2 hours 22 minutes before

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Hazardous weather outlook, Aug 12, 3:08 PM EDT, 2 hours 37 minutes before

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In the hours before

Local storm report, Aug 12, 4:58 PM EDT, 47 minutes before

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Special weather statement, Aug 12, 5:19 PM EDT, 26 minutes before

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Special weather statement, Aug 12, 5:23 PM EDT, 22 minutes before

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Local storm report, Aug 12, 5:43 PM EDT, 2 minutes before

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Local storm report, Aug 12, 5:45 PM EDT, 0 minutes before

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Special weather statement, Aug 12, 5:45 PM EDT, 0 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
Aug 12, 9:23 AM EDT	Special Weather Statement	RAH	Nash	67 min
Aug 12, 10:08 AM EDT	Special Weather Statement	RAH	Franklin, Nash	52 min
Aug 12, 10:43 AM EDT	Severe Thunderstorm Warning	RAH	Franklin	47 min
Aug 12, 10:57 AM EDT	Areal Flood Advisory	RAH	Franklin, Nash, Wake	93 min
Aug 12, 11:09 AM EDT	Special Weather Statement	RAH	Wayne	36 min
Aug 12, 11:22 AM EDT	Severe Thunderstorm Warning	RAH	Johnston, Wayne	53 min
Aug 12, 11:40 AM EDT	Special Weather Statement	RAH	Wilson	50 min
Aug 12, 11:52 AM EDT	Special Weather Statement	RAH	Franklin	53 min
Aug 12, 11:53 AM EDT	Areal Flood Advisory	RAH	Johnston, Wayne	2 hr
Aug 12, 12:21 PM EDT	Special Weather Statement	RAH	Wilson	39 min
Aug 12, 12:31 PM EDT	Severe Thunderstorm Warning	RAH	Wilson	44 min
Aug 12, 12:38 PM EDT	Flash Flood Warning	RAH	Johnston, Wayne	85 min
Aug 12, 12:53 PM EDT	Special Weather Statement	RAH	Wayne	22 min
Aug 12, 12:58 PM EDT	Severe Thunderstorm Warning	RAH	Wayne	31 min
Aug 12, 1:39 PM EDT	Special Weather Statement	RAH	Harnett	66 min
Aug 12, 3:10 PM EDT	Special Weather Statement	RAH	Chatham	50 min
Aug 12, 3:31 PM EDT	Special Weather Statement	RAH	Chatham, Lee, Moore	59 min
Aug 12, 3:49 PM EDT	Areal Flood Advisory	RAH	Anson, Stanly	110 min
Aug 12, 4:02 PM EDT	Flash Flood Warning	RAH	Anson, Stanly	87 min
Aug 12, 4:31 PM EDT	Special Weather Statement	RAH	Stanly	59 min
Aug 12, 4:36 PM EDT	Special Weather Statement	RAH	Orange	39 min
Aug 12, 4:44 PM EDT	Special Weather Statement	RAH	Randolph	61 min
Aug 12, 4:57 PM EDT	Special Weather Statement	RAH	Scotland	63 min
Aug 12, 4:58 PM EDT	Areal Flood Advisory	RAH	Alamance, Chatham, Orange, Randolph	108 min
Aug 12, 5:06 PM EDT	Areal Flood Advisory	RAH	Scotland	2 hr
Aug 12, 5:19 PM EDT	Special Weather Statement	RAH	Orange	56 min
Aug 12, 5:23 PM EDT	Special Weather Statement	RAH	Alamance	52 min
Aug 12, 5:36 PM EDT	Flash Flood Warning	RAH	Richmond, Scotland	85 min
Aug 12, 5:55 PM EDT	Areal Flood Advisory	RAH	Guilford	24 min
Aug 12, 6:16 PM EDT	Flash Flood Warning	RAH	Guilford	71 min
Aug 12, 6:31 PM EDT	Special Weather Statement	RAH	Person	59 min

Nearby

Special Weather Statements in North Carolina, 2011 Every special weather statement in 2011

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.