Alert archive / Delaware / Tornado Warnings in 2011

Tornado Warning 22, NWS Philadelphia/Mount Holly

August 27, 2011New Castle County, Delaware; Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this tornado warning at Aug 27, 2011, 9:46 PM EDT for New Castle County, Delaware; Salem County, New Jersey. It was in force for 29 min. 1 report 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
Aug 27, 2011, 9:46 PM EDT (01:46 UTC)
Expired
Aug 27, 2011, 10:15 PM EDT
In force
29 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties New Castle County, DE, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 87 km from the middle of the area, began a volume at 01:48 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

TimeReportWhereRemark
Aug 27, 10:25 PM EDTNON-TSTM WND DMGNew Castle, DELARGE BRANCHES BROKEN

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.

IssuedProductOfficeLasted
Aug 27, 7:56 PM EDTTornado WatchSPC9 hr

The nearest sounding before it

Washington/Dulle, VA (KIAD), launched 00:00Z, 1.8 hours before the alert went out and 175 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-pSkew-T log-p diagram, Washington/Dulle, VA at 00:00Z on 2011-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 117 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Washington/Dulle, VA at 00:00Z on 2011-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 190 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
117 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
190 m²/s²
0-3 km storm-relative helicity
50 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.4

Open this sounding in Storm Lab

The text

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

863 
WFUS51 KPHI 280146
TORPHI
DEC003-NJC033-280215-
/O.NEW.KPHI.TO.W.0022.110828T0146Z-110828T0215Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
946 PM EDT SAT AUG 27 2011

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* TORNADO WARNING FOR...
  CENTRAL NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF NEWARK...
  WESTERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 1015 PM EDT

* AT 943 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR ALLOWAY...
  OR 15 MILES SOUTHEAST OF WILMINGTON...MOVING WEST AT 35 MPH.

* THE TORNADO WILL BE NEAR...
  SALEM BY 955 PM EDT...
  PENNSVILLE BY 1000 PM EDT...
  DELAWARE CITY BY 1005 PM EDT...
  NEW CASTLE...WILMINGTON MANOR AND NEWPORT BY 1010 PM EDT...
  BEAR BY 1015 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.

&&

LAT...LON 3979 7574 3963 7522 3952 7527 3948 7536
      3952 7554 3956 7553 3958 7554 3958 7556
      3954 7555 3952 7557 3957 7579 3970 7579
TIME...MOT...LOC 0146Z 109DEG 28KT 3958 7537

$$

HEAVENER
3 follow-up statements
143 
WWUS51 KPHI 280158
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
958 PM EDT SAT AUG 27 2011

DEC003-NJC033-280215-
/O.CON.KPHI.TO.W.0022.000000T0000Z-110828T0215Z/
SALEM NJ-NEW CASTLE DE-
958 PM EDT SAT AUG 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR CENTRAL
NEW CASTLE AND WEST CENTRAL SALEM COUNTIES...

AT 952 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A TORNADO.  THIS TORNADO WAS LOCATED NEAR SALEM...OR 11
MILES SOUTHEAST OF WILMINGTON...MOVING WEST AT 30 MPH.

THE TORNADO WILL BE NEAR...
  DELAWARE CITY BY 1005 PM EDT...
  NEW CASTLE...WILMINGTON MANOR AND 6 MILES NORTH OF SAINT GEORGES BY
  1010 PM EDT...
  BEAR...BROOKSIDE...STANTON AND NEWPORT BY 1015 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.

&&

LAT...LON 3979 7574 3967 7537 3955 7539 3950 7546
      3952 7554 3956 7553 3958 7554 3958 7556
      3955 7555 3952 7557 3957 7579 3970 7579
TIME...MOT...LOC 0158Z 109DEG 28KT 3961 7549

$$

HEAVENER
440 
WWUS51 KPHI 280205
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1005 PM EDT SAT AUG 27 2011

DEC003-NJC033-280215-
/O.CON.KPHI.TO.W.0022.000000T0000Z-110828T0215Z/
SALEM NJ-NEW CASTLE DE-
1005 PM EDT SAT AUG 27 2011

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1015 PM EDT FOR CENTRAL
NEW CASTLE AND WESTERN SALEM COUNTIES...

AT 1003 PM EDT...A TORNADO WAS REPORTED.  THIS TORNADO WAS LOCATED
NEAR PENNSVILLE...OR 7 MILES SOUTH OF WILMINGTON...MOVING WEST AT 30
MPH.

THE TORNADO WILL BE NEAR...
  NEW CASTLE...WILMINGTON MANOR AND 6 MILES NORTH OF SAINT GEORGES BY
  1010 PM EDT...
  BEAR...BROOKSIDE...STANTON AND NEWPORT BY 1015 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.

IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A
SUBSTANTIAL SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE
NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS.

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.

&&

LAT...LON 3979 7574 3967 7537 3955 7539 3950 7546
      3952 7554 3956 7553 3958 7554 3958 7556
      3955 7555 3952 7557 3957 7579 3970 7579
TIME...MOT...LOC 0204Z 109DEG 28KT 3963 7555

$$

HAYES/GAINES
781 
WWUS51 KPHI 280216
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1016 PM EDT SAT AUG 27 2011

DEC003-NJC033-280226-
/O.EXP.KPHI.TO.W.0022.000000T0000Z-110828T0215Z/
SALEM NJ-NEW CASTLE DE-
1016 PM EDT SAT AUG 27 2011

...THE TORNADO WARNING FOR CENTRAL NEW CASTLE AND WESTERN SALEM
COUNTIES HAS EXPIRED...

PLEASE REPORT HAIL OR STRONG WINDS TO THE NATIONAL WEATHER SERVICE BY
CALLING TOLL FREE...1-877-633-6772...WHEN YOU CAN DO SO SAFELY.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 500 AM EDT SUNDAY MORNING FOR
SOUTHERN DELAWARE AND NEW JERSEY.

LAT...LON 3979 7574 3967 7537 3955 7539 3950 7546
      3952 7554 3956 7553 3958 7554 3958 7556
      3955 7555 3952 7557 3957 7579 3970 7579
TIME...MOT...LOC 0205Z 109DEG 28KT 3963 7556

$$

HAYES/GAINES

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 8:28 PM EDTFlash Flood WarningPHIKent, New Castle, Sussex12 hr
Aug 27, 8:33 PM EDTTornado WarningPHIKent, Sussex27 min
Aug 27, 8:49 PM EDTTornado WarningPHIKent26 min
Aug 27, 10:14 PM EDTTornado WarningPHINew Castle31 min
Aug 27, 11:37 PM EDTFlash Flood WarningPHINew Castle12 hr
Aug 28, 7:07 AM EDTAreal Flood WarningPHIKent, Sussex12 hr
Aug 28, 8:09 AM EDTAreal Flood WarningPHINew Castle12 hr
Aug 28, 11:07 AM EDTAreal Flood WarningPHINew Castle18 hr
Aug 28, 7:03 PM EDTAreal Flood WarningPHISussex22 hr
Aug 27, 8:41 PM EDTTornado WarningPHIAtlantic34 min
Aug 27, 9:03 PM EDTTornado WarningPHIBurlington, Ocean27 min
Aug 27, 9:08 PM EDTTornado WarningPHIAtlantic, Cape May, Cumberland37 min
Aug 27, 9:29 PM EDTTornado WarningPHICamden, Gloucester31 min
Aug 27, 9:43 PM EDTAreal Flood WarningPHIHunterdon, Morris, Somerset, Sussex, Warren6 hr
Aug 27, 9:56 PM EDTSpecial Marine WarningPHI19 min
Aug 27, 9:58 PM EDTRiver Flood WarningPHISussex, Warren48 hr
Aug 27, 9:58 PM EDTRiver Flood WarningPHISussex, Warren17 hr
Aug 27, 10:08 PM EDTTornado WarningPHIBurlington, Ocean37 min
Aug 27, 10:11 PM EDTRiver Flood WarningPHIPassaic4 days
Aug 27, 10:36 PM EDTTornado WarningPHIBurlington24 min
Aug 27, 10:56 PM EDTTornado WarningPHIMercer, Monmouth, Ocean34 min
Aug 27, 11:52 PM EDTSpecial Marine WarningPHI23 min
Aug 28, 12:55 AM EDTSpecial Weather StatementPHIAtlantic, Cumberland65 min
Aug 28, 2:40 AM EDTTornado WarningPHIMercer, Monmouth, Ocean35 min
Aug 28, 3:50 AM EDTFlash Flood WarningPHIHunterdon, Morris, Somerset, Sussex, Warren10 hr
Aug 28, 1:27 PM EDTAreal Flood WarningPHIHunterdon, Morris, Somerset, Sussex, Warren8 hr

Nearby

Tornado Warnings in Delaware, 2011Tornado Warnings in New Jersey, 2011Every tornado warning in 2011Tornadoes 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.