Alert archive / Delaware / Severe Thunderstorm Warnings in 2006

Severe Thunderstorm Warning 263, NWS Philadelphia/Mount Holly

August 29, 2006New Castle County, Delaware

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 29, 2006, 3:42 PM EDT for New Castle County, Delaware. It was in force for 33 min. 5 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
Aug 29, 2006, 3:42 PM EDT (19:42 UTC)
Expired
Aug 29, 2006, 4:15 PM EDT
In force
33 min
Issued by
NWS Philadelphia/Mount Holly
Area
Counties, with a storm outline in the text

County New Castle County, DE

The radar

The Philadelphia radar (KDIX), 106 km from the middle of the area, began a volume at 19:42 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 29, 4:00 PM EDTTSTM WND DMG5 Sw Boothwyn, DEWIRES REPORTED DOWN IN BRANDYWINE HUNDRED.
Aug 29, 4:15 PM EDTTSTM WND DMGWilmington, DEWIRES REPORTED DOWN ON WOODSDALE ROAD IN WILMINGTON.
Aug 29, 4:20 PM EDTFUNNEL CLOUDWilmington, DEA FUNNEL CLOUD WAS OBSERVED JUST WEST OF WILMINGTON.
Aug 29, 4:20 PM EDTFUNNEL CLOUDWilmington, DEA FUNNEL CLOUD WAS OBSERVED JUST WEST OF WILMINGTON NEAR ROUTE 48, HOWEVER NO TOUCHDOWN WAS OBSERVED OR REPORTED.
Aug 29, 4:20 PM EDTFUNNEL CLOUDWilmington, DEA FUNNEL CLOUD WAS OBSERVED JUST WEST OF WILMINGTON NEAR ROUTE 48. NO TOUCHDOWN OR DAMAGED REPORTED.

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 29, 1:52 PM EDTTornado WatchSPC6 hr

The nearest sounding before it

Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 7.7 hours before the alert went out and 53 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, Phillips Aaf/Abe, MD at 12:00Z on 2006-08-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 21 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phillips Aaf/Abe, MD at 12:00Z on 2006-08-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 98 square meters per square second.193958Sfc1 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
21 J/kg
Mixed-layer CIN
-132 J/kg
Mixed-layer LCL
934 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
98 m²/s²
0-3 km storm-relative helicity
185 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
WUUS51 KPHI 291942
SVRPHI
DEC003-292015-
/O.NEW.KPHI.SV.W.0263.060829T1942Z-060829T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
342 PM EDT TUE AUG 29 2006

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE
  THIS INCLUDES THE CITY OF WILMINGTON

* UNTIL 415 PM EDT

* AT 338 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  NORTH STAR...OR ABOUT 8 MILES NORTH OF NEWARK...AND MOVING 
  SOUTHEAST AT 25 MPH. THIS STORM WAS SHOWING 60 MPH OF WIND AT 
  ABOUT FIVE THOUSAND FEET.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  STANTON BY 355 PM EDT...
  ELSMERE...TALLEYVILLE AND NEWPORT BY 400 PM EDT...
  WILMINGTON...WILMINGTON MANOR AND 6 MILES NORTH OF NEW CASTLE BY
  405 PM EDT...
  BELLEFONTE BY 410 PM EDT...

IN ADDITION TO LARGE HAIL AND DAMAGING WINDS...CONTINUOUS CLOUD TO 
GROUND LIGHTNING IS OCCURRING WITH THIS STORM. MOVE INDOORS 
IMMEDIATELY LIGHTNING IS ONE OF NATURES NUMBER ONE KILLERS. 
REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO BE 
STRUCK BY LIGHTNING.

LAT...LON 3984 7567 3977 7579 3964 7559 3980 7542

$$

TFG
1 follow-up statement
000 
WWUS51 KPHI 291957
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
357 PM EDT TUE AUG 29 2006

DEC003-292015-
/O.CON.KPHI.SV.W.0263.000000T0000Z-060829T2015Z/
NEW CASTLE DE-
357 PM EDT TUE AUG 29 2006

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 415 PM EDT
FOR CENTRAL NEW CASTLE COUNTY...

AT 355 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PENNY SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR STANTON...OR ABOUT 6 MILES NORTH OF NEWARK. THIS STORM
WAS NEARLY STATIONARY.

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. IF A TORNADO
IS SPOTTED... ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

DOPPLER RADAR NOW INDICATED SOME ROTATION WITHIN THIS STORM. WHILE 
NOT IMMEDIATELY LIKELY...A TORNADO MAY STILL DEVELOP. IF A TORNADO 
IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF SAFETY IN A STURDY 
STRUCTURE...SUCH AS A BASEMENT OR SMALL INTERIOR ROOM.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM EDT TUESDAY EVENING
FOR NORTHERN DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW
JERSEY AND EASTERN PENNSYLVANIA.

LAT...LON 3980 7561 3976 7571 3964 7559 3980 7542

$$

TFG

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 4:02 PM EDTTornado WarningPHINew Castle28 min
Aug 29, 4:28 PM EDTTornado WarningPHINew Castle47 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2006Every severe thunderstorm warning in 2006

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.