Alert archive / North Carolina / Severe Thunderstorm Warnings in 2015

Severe Thunderstorm Warning 157, NWS Raleigh, NC

July 13, 2015Harnett County, Johnston County, Wake County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 13, 2015, 7:21 AM EDT for Harnett County, Johnston County, Wake County, 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: Jul 13, 2015, 7:21 AM EDT (11:21 UTC)
Expired: Jul 13, 2015, 8:15 AM EDT
In force: 54 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon

Counties Harnett County, NC, Johnston County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 17 km from the middle of the area, began a volume at 11:23 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

Roanoke, VA (KRNK), launched 00:00Z, 11.4 hours before the alert went out and 198 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: 357 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 637 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 9 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 13, 4:08 AM EDT, 3 hours 13 minutes earlier.

Area forecast discussion, Jul 13, 4:08 AM EDT, 3 hours 13 minutes before

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Hazardous weather outlook, Jul 13, 4:30 AM EDT, 2 hours 51 minutes before

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In the hours before

Special weather statement, Jul 13, 6:00 AM EDT, 1 hour 21 minutes before

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Special weather statement, Jul 13, 6:19 AM EDT, 1 hour 2 minutes before

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Special weather statement, Jul 13, 6:53 AM EDT, 28 minutes before

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Special weather statement, Jul 13, 7:04 AM EDT, 17 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 13, 6:00 AM EDT	Special Weather Statement	RAH	Wake	60 min
Jul 13, 6:19 AM EDT	Special Weather Statement	RAH	Wake	56 min
Jul 13, 6:53 AM EDT	Special Weather Statement	RAH	Johnston	52 min
Jul 13, 7:04 AM EDT	Special Weather Statement	RAH	Harnett	56 min
Jul 13, 7:59 AM EDT	Special Weather Statement	RAH	Wayne	46 min
Jul 13, 8:14 AM EDT	Special Weather Statement	RAH	Wayne	61 min
Jul 13, 10:19 AM EDT	Special Weather Statement	RAH	Wayne	56 min
Jul 13, 11:21 AM EDT	Special Weather Statement	RAH	Wayne	24 min
Jul 13, 11:45 AM EDT	Tornado Warning	RAH	Sampson	45 min
Jul 13, 12:46 PM EDT	Severe Thunderstorm Warning	RAH	Cumberland, Sampson	59 min
Jul 13, 2:18 PM EDT	Special Weather Statement	RAH	Cumberland	57 min
Jul 13, 2:20 PM EDT	Special Weather Statement	RAH	Hoke	55 min
Jul 13, 2:44 PM EDT	Areal Flood Advisory	RAH	Cumberland	2 hr
Jul 13, 2:58 PM EDT	Special Weather Statement	RAH	Harnett	62 min
Jul 13, 6:03 PM EDT	Special Weather Statement	RAH	Davidson	42 min
Jul 13, 6:30 PM EDT	Special Weather Statement	RAH	Stanly	45 min
Jul 13, 6:38 PM EDT	Areal Flood Advisory	RAH	Davidson	3 hr
Jul 13, 7:18 PM EDT	Special Weather Statement	RAH	Alamance, Forsyth, Guilford	57 min
Jul 13, 7:27 PM EDT	Severe Thunderstorm Warning	RAH	Montgomery, Moore, Randolph	63 min
Jul 13, 7:46 PM EDT	Severe Thunderstorm Warning	RAH	Forsyth	59 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2015 Every severe thunderstorm warning in 2015

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.