Alert archive / Delaware / Tornado Warnings in 2013

Tornado Warning 1, NWS Philadelphia/Mount Holly

June 10, 2013New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this tornado warning at Jun 10, 2013, 4:46 PM EDT for New Castle County, Delaware. It was in force for 29 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: Jun 10, 2013, 4:46 PM EDT (20:46 UTC)
Expired: Jun 10, 2013, 5:15 PM EDT
In force: 29 min
Issued by: NWS Philadelphia/Mount Holly
Area: Storm-based polygon

County New Castle County, DE

The radar

The Dover AFB radar (KDOX), 105 km from the middle of the area, began a volume at 20:46 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
Jun 10, 4:47 PM EDT	TORNADO	Newark, DE	EF0 TORNADO CONFIRMED WITH MAXIMUM WINDS OF 80 MPH. LENGTH OF 0.4 MILES AND WIDTH OF 150 YARDS.
Jun 10, 5:20 PM EDT	TSTM WND DMG	Newark, DE	LARGE TREES DOWN ON HOUSES WITH 10-20 HOMES HEAVILY DAMAGED BETWEEN GLASGOW AND NEWARK ALONG ROUTES 72 AND 4.

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
Jun 10, 2:02 PM EDT	Tornado Watch	SPC	10 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.8 hours before the alert went out and 48 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: 111 J/kg
Mixed-layer CIN: -63 J/kg
Mixed-layer LCL: 596 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 64 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

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

261 
WFUS51 KPHI 102046
TORPHI
DEC003-102115-
/O.NEW.KPHI.TO.W.0001.130610T2046Z-130610T2115Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
446 PM EDT MON JUN 10 2013

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...

* UNTIL 515 PM EDT

* AT 438 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THE STORM
  CONTAINING THE POSSIBLE TORNADO WAS NEAR GLASGOW...MOVING NORTHEAST
  AT 30 MPH.

* THE TORNADO WILL BE NEAR...
  PIKE CREEK AROUND 450 PM EDT...
  STANTON AND NEWPORT AROUND 455 PM EDT...
  ASHLAND AND HOCKESSIN AROUND 500 PM EDT...
  TALLEYVILLE AND ARDEN AROUND 510 PM EDT...

WHEN A TORNADO WARNING IS ISSUED BASED ON DOPPLER RADAR...IT MEANS
THAT STRONG ROTATION HAS BEEN DETECTED IN THE STORM. A TORNADO MAY
ALREADY BE ON THE GROUND...OR IS EXPECTED TO DEVELOP SHORTLY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER INSIDE NOW. DO NOT WAIT TO SEE OR HEAR THE TORNADO. MOVE
TO AN INTERIOR ROOM ON THE LOWEST LEVEL OF A STURDY BUILDING. PUT AS
MANY WALLS BETWEEN YOU AND THE OUTSIDE AS YOU CAN. AVOID WINDOWS.
PROTECT YOURSELF FROM FLYING DEBRIS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3972 7579 3978 7573 3982 7567 3984 7561
      3984 7556 3980 7545 3961 7574 3963 7579
TIME...MOT...LOC 2042Z 213DEG 25KT 3966 7573

$$

FORECASTER: HEAVENER

2 follow-up statements

852 
WWUS51 KPHI 102059
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
459 PM EDT MON JUN 10 2013

DEC003-102115-
/O.CON.KPHI.TO.W.0001.000000T0000Z-130610T2115Z/
NEW CASTLE DE-
459 PM EDT MON JUN 10 2013

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 515 PM EDT FOR NORTHERN
NEW CASTLE COUNTY...

AT 458 PM EDT...WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE A
SEVERE THUNDERSTORM WITH STRONG ROTATION THAT MAY BE PRODUCING A
TORNADO. THIS STORM THAT MAY BE PRODUCING A TORNADO WAS LOCATED NEAR
STANTON...OR 7 MILES WEST OF WILMINGTON...MOVING NORTHEAST AT 30 MPH.

THE TORNADO WILL BE NEAR...
ASHLAND AROUND 505 PM EDT...
TALLEYVILLE AROUND 510 PM EDT...
ARDEN AROUND 515 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS STORM HAS A HISTORY OF PRODUCING WIND DAMAGE IN AND AROUND THE 
CITY OF GLASGOW. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE...AND STAY AWAY 
FROM WINDOWS.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

&&

LAT...LON 3978 7573 3982 7567 3984 7561 3984 7555
      3981 7548 3971 7564 3974 7574
TIME...MOT...LOC 2059Z 213DEG 25KT 3976 7565

$$

FORECASTER: HEAVENER

179 
WWUS51 KPHI 102105
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
505 PM EDT MON JUN 10 2013

DEC003-102115-
/O.EXP.KPHI.TO.W.0001.000000T0000Z-130610T2115Z/
NEW CASTLE DE-
505 PM EDT MON JUN 10 2013

...THE TORNADO WARNING FOR NORTHERN NEW CASTLE COUNTY WILL EXPIRE AT
515 PM EDT...

THE TORNADO WARNING WILL BE ALLOWED TO EXPIRE.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM EDT MONDAY EVENING
FOR DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY AND
SOUTHEAST PENNSYLVANIA.

LAT...LON 3978 7573 3982 7567 3984 7561 3984 7555
      3981 7548 3971 7564 3974 7574
TIME...MOT...LOC 2105Z 213DEG 25KT 3979 7562

$$

FORECASTER: HEAVENER

The office that day

Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 3:30 AM EDT	Flood Watch	PHI	Kent, New Castle, Sussex	24 hr
Jun 10, 5:58 AM EDT	Areal Flood Advisory	PHI	New Castle	3 hr
Jun 10, 2:44 PM EDT	Special Weather Statement	PHI	Sussex	61 min
Jun 10, 3:00 PM EDT	Severe Thunderstorm Warning	PHI	Kent, Sussex	60 min
Jun 10, 4:02 PM EDT	Areal Flood Advisory	PHI	New Castle	4 hr
Jun 10, 5:06 PM EDT	Areal Flood Warning	PHI	New Castle	12 hr
Jun 10, 6:17 PM EDT	River Flood Warning	PHI	New Castle	5 hr
Jun 10, 6:59 PM EDT	River Flood Warning	PHI	New Castle	70 min

Nearby

Tornado Warnings in Delaware, 2013 Every tornado warning in 2013 Tornadoes in 2013

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.