Alert archive / North Carolina / Tornado Warnings in 2011

Tornado Warning 20, NWS Newport/Morehead City, NC

April 16, 2011Dare County, North Carolina

NWS Newport/Morehead City, NC issued this tornado warning at Apr 16, 2011, 9:27 PM EDT for Dare County, North Carolina. It was in force for 33 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 16, 2011, 9:27 PM EDT (01:27 UTC)
Expired: Apr 16, 2011, 10:00 PM EDT
In force: 33 min
Issued by: NWS Newport/Morehead City, NC
Area: Storm-based polygon

County Dare County, NC

The radar

The Norfolk radar (KAKQ), 146 km from the middle of the area, began a volume at 01:31 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.

What was reported inside it

Time	Report	Where	Remark
Apr 16, 9:35 PM EDT	TORNADO	Duck, NC	2 ROOFS BLOWN OFF HOUSES. RELAYED FROM LWX.
Apr 16, 9:36 PM EDT	TORNADO	Duck, NC	TREES AND POWERLINES DOWN IN DUCK AND SOUTHERN SHORES. TIME ESTIMATED BY RADAR.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 16, 12:02 PM EDT	Tornado Watch PDS	SPC	11 hr

The nearest sounding before it

Newport, NC (KMHX), launched 00:00Z, 1.5 hours before the alert went out and 183 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: 2506 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 466 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 576 m²/s²
0-3 km storm-relative helicity: 688 m²/s²
Significant tornado parameter: 9.2
Supercell composite: 37.9

Open this sounding in Storm Lab

The text

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

347 
WFUS52 KMHX 170127
TORMHX
NCC055-170200-
/O.NEW.KMHX.TO.W.0020.110417T0127Z-110417T0200Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE NEWPORT/MOREHEAD CITY NC
927 PM EDT SAT APR 16 2011

THE NATIONAL WEATHER SERVICE IN NEWPORT HAS ISSUED A

* TORNADO WARNING FOR...
  EXTREME NORTH CENTRAL DARE COUNTY IN EASTERN NORTH CAROLINA

* UNTIL 1000 PM EDT

* AT 922 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  TORNADO 10 MILES WEST OF KITTY HAWK...OR 12 MILES SOUTHWEST OF
  DUCK...MOVING NORTHEAST AT 65 MPH. QUARTER SIZED HAIL AND DAMAGING
  WINDS IN EXCESS OF 58 MPH ARE ALSO LIKELY WITH THIS STORM.

* LOCATIONS IMPACTED INCLUDE...
  DUCK...SANDERLING...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER. IF NO SHELTER IS
AVAILABLE LIE DOWN IN A LOW LYING AREA. PROTECT YOURSELF FROM FLYING
DEBRIS.

PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE BY
CALLING...1...8 0 0...8 8 9...6 8 8 9 OR NOTIFY YOUR LOCAL LAW
ENFORCEMENT AGENCY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1100 PM EDT SATURDAY EVENING
FOR EASTERN NORTH CAROLINA.

&&

LAT...LON 3622 7576 3619 7575 3617 7574 3608 7570
      3605 7574 3606 7575 3607 7575 3611 7577
      3614 7576 3622 7578 3623 7578
TIME...MOT...LOC 0127Z 223DEG 57KT 3611 7583

$$

8

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 16, 8:14 PM EDT	Tornado Warning	MHX	Carteret, Craven, Jones, Onslow	46 min
Apr 16, 8:22 PM EDT	Special Marine Warning	MHX		37 min
Apr 16, 8:23 PM EDT	Tornado Warning	MHX	Beaufort, Hyde, Tyrrell, Washington	52 min
Apr 16, 8:40 PM EDT	Tornado Warning	MHX	Beaufort, Craven, Pamlico	50 min
Apr 16, 9:01 PM EDT	Special Marine Warning	MHX		44 min
Apr 16, 9:05 PM EDT	Special Marine Warning	MHX		40 min
Apr 16, 9:16 PM EDT	Tornado Warning	MHX	Dare, Tyrrell	44 min
Apr 16, 9:26 PM EDT	Special Marine Warning	MHX		64 min
Apr 16, 9:39 PM EDT	Tornado Warning	MHX	Dare, Hyde	51 min
Apr 16, 10:23 PM EDT	Severe Thunderstorm Warning	MHX	Dare, Hyde	37 min
Apr 17, 12:15 AM EDT	Small Craft Advisory	MHX		20 hr

Nearby

Tornado Warnings in North Carolina, 2011 Every tornado warning in 2011 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.