Alert archive / North Carolina / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 51, NWS Newport/Morehead City, NC

July 20, 2011Washington County, North Carolina

NWS Newport/Morehead City, NC issued this severe thunderstorm warning at Jul 20, 2011, 4:36 PM EDT for Washington County, North Carolina. It was in force for 24 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 20, 2011, 4:36 PM EDT (20:36 UTC)
Expired: Jul 20, 2011, 5:00 PM EDT
In force: 24 min
Issued by: NWS Newport/Morehead City, NC
Area: Storm-based polygon

County Washington County, NC

The radar

The Morehead City radar (KMHX), 121 km from the middle of the area, began a volume at 20:39 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

Newport, NC (KMHX), launched 12:00Z, 8.6 hours before the alert went out and 121 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: 911 J/kg
Mixed-layer CIN: -77 J/kg
Mixed-layer LCL: 967 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 50 m²/s²
0-3 km storm-relative helicity: 88 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 Newport/Morehead City, NC wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 3:10 PM EDT, 1 hour 26 minutes earlier.

Area forecast discussion, Jul 20, 3:10 PM EDT, 1 hour 26 minutes before

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Hazardous weather outlook, Jul 20, 3:43 PM EDT, 53 minutes before

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In the hours before

Special weather statement, Jul 20, 1:54 PM EDT, 2 hours 42 minutes before

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Special weather statement, Jul 20, 3:35 PM EDT, 1 hour 1 minute before

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Special weather statement, Jul 20, 3:51 PM EDT, 45 minutes before

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Special weather statement, Jul 20, 4:26 PM EDT, 10 minutes before

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Special weather statement, Jul 20, 4:26 PM EDT, 10 minutes before

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The office that day

Everything else NWS Newport/Morehead City, NC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 20, 2:37 PM EDT	Heat Advisory	MHX	Beaufort, Dare, Duplin, Greene, Hyde, Jones and 6 more	29 hr
Jul 20, 3:35 PM EDT	Special Weather Statement	MHX	Beaufort	55 min
Jul 20, 3:51 PM EDT	Special Weather Statement	MHX	Hyde	39 min
Jul 20, 4:38 PM EDT	Special Weather Statement	MHX	Jones	52 min
Jul 20, 5:00 PM EDT	Special Weather Statement	MHX	Beaufort	30 min
Jul 20, 5:10 PM EDT	Special Weather Statement	MHX	Duplin	35 min
Jul 20, 5:30 PM EDT	Special Weather Statement	MHX	Onslow	45 min
Jul 20, 5:52 PM EDT	Special Weather Statement	MHX	Craven	38 min
Jul 20, 6:04 PM EDT	Special Weather Statement	MHX	Martin	56 min
Jul 20, 6:12 PM EDT	Special Weather Statement	MHX	Duplin	48 min
Jul 20, 7:52 PM EDT	Special Weather Statement	MHX	Pitt	23 min

Nearby

Severe Thunderstorm Warnings in North Carolina, 2011 Every severe thunderstorm warning 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.