Alert archive / Delaware / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 49, NWS Philadelphia/Mount Holly

June 22, 2012Kent County, New Castle County, Delaware; Cumberland County, Salem County, New Jersey

NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jun 22, 2012, 8:27 PM EDT for Kent County, New Castle County, Delaware; Cumberland County, Salem County, New Jersey. It was in force for 45 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 22, 2012, 8:27 PM EDT (00:27 UTC)
Expired
Jun 22, 2012, 9:12 PM EDT
In force
45 min
Issued by
NWS Philadelphia/Mount Holly
Area
Storm-based polygon

Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Salem County, NJ

The radar

The Dover AFB radar (KDOX), 61 km from the middle of the area, began a volume at 00:26 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
Jun 22, 8:44 PM EDTTSTM WND DMGGreenwich, NJTREES AND WIRES DOWN.
Jun 22, 8:45 PM EDTTSTM WND DMGGreenwich, NJTREES DOWN IN THE TOWNSHIP.

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
Jun 22, 2:12 PM EDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Wallops Is Stn, VA (KWAL), launched 00:00Z, 0.5 hours before the alert went out and 160 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, Wallops Is Stn, VA at 00:00Z on 2012-06-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1073 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, Wallops Is Stn, VA at 00:00Z on 2012-06-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 18 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
1073 J/kg
Mixed-layer CIN
-98 J/kg
Mixed-layer LCL
1341 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
18 m²/s²
0-3 km storm-relative helicity
12 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

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

561 
WUUS51 KPHI 230027
SVRPHI
DEC001-003-NJC011-033-230130-
/O.NEW.KPHI.SV.W.0049.120623T0027Z-120623T0130Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
827 PM EDT FRI JUN 22 2012

THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN KENT COUNTY IN CENTRAL DELAWARE...
  SOUTHERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
  THIS INCLUDES THE CITY OF MIDDLETOWN...
  CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
  THIS INCLUDES THE CITIES OF...VINELAND...MILLVILLE...
  SOUTHERN SALEM COUNTY IN SOUTHERN NEW JERSEY...

* UNTIL 930 PM EDT

* AT 825 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  GREEN SPRING...OR 7 MILES SOUTHEAST OF MIDDLETOWN...AND MOVING EAST
  AT 10 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  SMYRNA AROUND 835 PM EDT...
  WOODLAND BEACH AROUND 915 PM EDT...
  NEWPORT MEADOWS...GREENWICH...9 MILES SOUTH OF HANCOCKS BRIDGE AND
  9 MILES SOUTHWEST OF SHILOH AROUND 930 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...LARGE HAIL...AND DEADLY CLOUD TO
GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR NORTHERN
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.

&&

LAT...LON 3920 7515 3929 7526 3928 7529 3934 7534
      3935 7539 3943 7547 3945 7553 3944 7555
      3937 7551 3932 7543 3920 7538 3914 7575
      3946 7577 3951 7556 3946 7558 3944 7556
      3951 7554 3962 7515 3941 7485 3938 7485
TIME...MOT...LOC 0027Z 263DEG 9KT 3936 7564

$$

NIERENBERG
2 follow-up statements
018 
WWUS51 KPHI 230058
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
858 PM EDT FRI JUN 22 2012

DEC003-230108-
/O.CAN.KPHI.SV.W.0049.000000T0000Z-120623T0130Z/
NEW CASTLE DE-
858 PM EDT FRI JUN 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN NEW CASTLE COUNTY IS
CANCELLED...

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR NORTHERN
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.

LAT...LON 3920 7515 3929 7526 3928 7529 3934 7534
      3935 7538 3931 7543 3920 7538 3916 7559
      3936 7553 3937 7551 3932 7543 3935 7539
      3943 7547 3946 7555 3951 7554 3962 7515
      3941 7485 3938 7485
TIME...MOT...LOC 0058Z 263DEG 9KT 3937 7554

$$

DEC001-NJC011-033-230130-
/O.CON.KPHI.SV.W.0049.000000T0000Z-120623T0130Z/
KENT DE-SALEM NJ-CUMBERLAND NJ-
858 PM EDT FRI JUN 22 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 930 PM EDT
FOR CUMBERLAND...SOUTHERN SALEM AND NORTHEASTERN KENT COUNTIES...

AT 855 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR WOODLAND BEACH...OR 11 MILES SOUTHEAST OF MIDDLETOWN...
MOVING EAST AT 10 MPH.

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WOODLAND BEACH BY 915 PM EDT...
  NEWPORT MEADOWS...GREENWICH...9 MILES SOUTH OF HANCOCKS BRIDGE AND
  9 MILES SOUTHWEST OF SHILOH BY 930 PM EDT...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY
EVENING FOR SOUTHERN NEW JERSEY. A SEVERE THUNDERSTORM WATCH ALSO
REMAINS IN EFFECT UNTIL 900 PM EDT FRIDAY EVENING FOR NORTHERN
DELAWARE AND NORTHEASTERN MARYLAND AND SOUTHERN NEW JERSEY.

&&

LAT...LON 3920 7515 3929 7526 3928 7529 3934 7534
      3935 7538 3931 7543 3920 7538 3916 7559
      3936 7553 3937 7551 3932 7543 3935 7539
      3943 7547 3946 7555 3951 7554 3962 7515
      3941 7485 3938 7485
TIME...MOT...LOC 0058Z 263DEG 9KT 3937 7554

$$

NIERENBERG
448 
WWUS51 KPHI 230112
SVSPHI

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
912 PM EDT FRI JUN 22 2012

DEC001-NJC011-033-230122-
/O.CAN.KPHI.SV.W.0049.000000T0000Z-120623T0130Z/
KENT DE-SALEM NJ-CUMBERLAND NJ-
912 PM EDT FRI JUN 22 2012

...THE SEVERE THUNDERSTORM WARNING FOR CUMBERLAND...SOUTHERN SALEM
AND NORTHEASTERN KENT COUNTIES IS CANCELLED...

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.

LAT...LON 3920 7515 3929 7526 3928 7529 3934 7534
      3935 7538 3931 7543 3920 7538 3916 7559
      3936 7553 3937 7551 3932 7543 3935 7539
      3943 7547 3946 7555 3951 7554 3962 7515
      3941 7485 3938 7485
TIME...MOT...LOC 0112Z 263DEG 9KT 3937 7549

$$

NIERENBERG

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 22, 8:15 PM EDTFlash Flood WarningPHIKent, New Castle53 min
Jun 22, 9:02 PM EDTSpecial Weather StatementPHIKent58 min
Jun 22, 9:14 PM EDTSpecial Weather StatementPHINew Castle61 min
Jun 22, 9:15 PM EDTAreal Flood AdvisoryPHIKent, Sussex2 hr
Jun 22, 9:29 PM EDTSpecial Weather StatementPHISussex61 min
Jun 22, 9:57 PM EDTSpecial Weather StatementPHISussex63 min
Jun 22, 10:50 PM EDTSpecial Weather StatementPHISussex85 min
Jun 22, 8:00 PM EDTSevere Thunderstorm WarningPHIBurlington, Monmouth, Ocean45 min
Jun 22, 8:19 PM EDTFlash Flood WarningPHICumberland, Gloucester, Salem70 min
Jun 22, 8:28 PM EDTSpecial Marine WarningPHI62 min
Jun 22, 8:59 PM EDTSpecial Weather StatementPHICape May61 min
Jun 22, 9:34 PM EDTAreal Flood AdvisoryPHIAtlantic, Burlington, Camden, Monmouth, Ocean116 min

Nearby

Severe Thunderstorm Warnings in Delaware, 2012Severe Thunderstorm Warnings in New Jersey, 2012Every severe thunderstorm warning in 2012

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.