Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 93, NWS Raleigh, NC

July 4, 2020Franklin County, Wake County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Jul 4, 2020, 6:31 PM EDT for Franklin County, Wake County, North Carolina. It was in force for 44 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 4, 2020, 6:31 PM EDT (22:31 UTC)
Expired: Jul 4, 2020, 7:15 PM EDT
In force: 44 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Franklin County, NC, Wake County, NC

The radar

The Raleigh/Durham radar (KRAX), 30 km from the middle of the area, began a volume at 22:34 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, 10.5 hours before the alert went out and 130 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: 63 J/kg
Mixed-layer CIN: -80 J/kg
Mixed-layer LCL: 1844 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 26 m²/s²
0-3 km storm-relative helicity: 33 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 4, 4:08 PM EDT, 2 hours 23 minutes earlier.

Area forecast discussion, Jul 4, 4:08 PM EDT, 2 hours 23 minutes before

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Hazardous weather outlook, Jul 4, 4:12 PM EDT, 2 hours 19 minutes before

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In the hours before

Special weather statement, Jul 4, 3:06 PM EDT, 3 hours 25 minutes before

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Special weather statement, Jul 4, 4:32 PM EDT, 1 hour 59 minutes before

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Special weather statement, Jul 4, 4:41 PM EDT, 1 hour 50 minutes before

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Special weather statement, Jul 4, 5:01 PM EDT, 1 hour 30 minutes before

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Special weather statement, Jul 4, 6:03 PM EDT, 28 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 4, 3:06 PM EDT	Special Weather Statement	RAH	Halifax	54 min
Jul 4, 4:32 PM EDT	Special Weather Statement	RAH	Edgecombe	58 min
Jul 4, 4:41 PM EDT	Special Weather Statement	RAH	Chatham	64 min
Jul 4, 5:01 PM EDT	Special Weather Statement	RAH	Nash	59 min
Jul 4, 6:03 PM EDT	Special Weather Statement	RAH	Wilson	57 min
Jul 4, 6:14 PM EDT	Severe Thunderstorm Warning	RAH	Wilson	46 min
Jul 4, 6:41 PM EDT	Special Weather Statement	RAH	Alamance	64 min
Jul 4, 6:56 PM EDT	Severe Thunderstorm Warning	RAH	Nash	49 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2020 Every severe thunderstorm warning in 2020

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.