Alert archive / North Carolina / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 27, NWS Raleigh, NC

April 7, 2020Halifax County, Warren County, North Carolina

NWS Raleigh, NC issued this severe thunderstorm warning at Apr 7, 2020, 2:53 PM EDT for Halifax County, Warren County, North Carolina. It was in force for 52 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: Apr 7, 2020, 2:53 PM EDT (18:53 UTC)
Expired: Apr 7, 2020, 3:45 PM EDT
In force: 52 min
Issued by: NWS Raleigh, NC
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Halifax County, NC, Warren County, NC

The radar

The Raleigh/Durham radar (KRAX), 92 km from the middle of the area, began a volume at 18:55 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 12:00Z, 6.9 hours before the alert went out and 174 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: 6 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 1126 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 81 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 Apr 7, 2:35 PM EDT, 18 minutes earlier.

Area forecast discussion, Apr 7, 2:35 PM EDT, 18 minutes before

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Hazardous weather outlook, Apr 7, 2:46 PM EDT, 7 minutes before

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In the hours before

Special weather statement, Apr 7, 2:22 PM EDT, 31 minutes before

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Special weather statement, Apr 7, 2:26 PM EDT, 27 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
Apr 6, 8:00 PM EDT	Special Weather Statement	RAH	Cumberland	30 min
Apr 6, 8:04 PM EDT	Special Weather Statement	RAH	Sampson	56 min
Apr 7, 4:32 AM EDT	Dense Fog Advisory	RAH	Durham, Edgecombe, Franklin, Granville, Halifax, Johnston and 8 more	5 hr
Apr 7, 2:22 PM EDT	Special Weather Statement	RAH	Forsyth, Guilford	53 min
Apr 7, 2:26 PM EDT	Special Weather Statement	RAH	Warren	64 min
Apr 7, 3:16 PM EDT	Special Weather Statement	RAH	Granville, Vance	59 min
Apr 7, 3:50 PM EDT	Special Weather Statement	RAH	Halifax	55 min
Apr 7, 4:42 PM EDT	Special Weather Statement	RAH	Edgecombe, Franklin, Nash, Wilson	63 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.