Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 24, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 27, 2011, 4:43 PM EDT for Kent County, New Castle County, Delaware; Delaware County, Pennsylvania; Cumberland County, Gloucester County, Salem County, New Jersey. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 27, 2011, 4:43 PM EDT (20:43 UTC)
- Expired
- Apr 27, 2011, 5:19 PM EDT
- In force
- 36 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Kent County, DE, New Castle County, DE, Cumberland County, NJ, Gloucester County, NJ, Salem County, NJ, Delaware County, PA
The radar
The Dover AFB radar (KDOX), 76 km from the middle of the area, began a volume at 20:43 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.
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 8.7 hours before the alert went out and 51 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.
- Mixed-layer CAPE
- 139 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 640 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 84 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
307
WUUS51 KPHI 272043
SVRPHI
DEC001-003-NJC011-015-033-PAC045-272145-
/O.NEW.KPHI.SV.W.0024.110427T2043Z-110427T2145Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
443 PM EDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTH CENTRAL KENT COUNTY IN CENTRAL DELAWARE...
SOUTHEASTERN NEW CASTLE COUNTY IN NORTHERN DELAWARE...
SOUTH CENTRAL DELAWARE COUNTY IN SOUTHEAST PENNSYLVANIA...
NORTHWESTERN CUMBERLAND COUNTY IN SOUTHERN NEW JERSEY...
WEST CENTRAL GLOUCESTER COUNTY IN SOUTHERN NEW JERSEY...
SALEM COUNTY IN SOUTHERN NEW JERSEY...
* UNTIL 545 PM EDT
* AT 442 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
DAMAGING WINDS UP TO 60 MPH. THIS STORM WAS LOCATED 6 MILES
NORTHWEST OF WOODLAND BEACH...OR 9 MILES SOUTHEAST OF MIDDLETOWN...
AND MOVING NORTHEAST AT 30 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
PORT PENN AROUND 500 PM EDT...
HANCOCKS BRIDGE AROUND 505 PM EDT...
SALEM AROUND 510 PM EDT...
ALLOWAY AROUND 515 PM EDT...
WOODSTOWN AROUND 530 PM EDT...
BECKETT AROUND 540 PM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 3940 7568 3964 7556 3968 7551 3969 7553
3987 7544 3975 7513 3934 7538 3943 7548
3946 7555 3950 7557 3957 7553 3958 7556
3946 7558 3942 7553 3935 7548 3932 7543
3925 7543
TIME...MOT...LOC 2043Z 207DEG 24KT 3939 7556
$$
HEAVENER2 follow-up statements
545
WWUS51 KPHI 272057
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
457 PM EDT WED APR 27 2011
DEC001-003-PAC045-272106-
/O.CAN.KPHI.SV.W.0024.000000T0000Z-110427T2145Z/
KENT DE-DELAWARE PA-NEW CASTLE DE-
457 PM EDT WED APR 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN NEW CASTLE...
SOUTH CENTRAL DELAWARE AND NORTH CENTRAL KENT COUNTIES IS
CANCELLED...
THE SEVERE THUNDERSTORM HAS CROSSED THE BAY AND RIVER INTO NEW JERSEY.
THE TRACK NO LONGER WOULD TAKE IT INTO DELAWARE COUNTY PENNSYLVANIA.
LAT...LON 3934 7538 3938 7542 3937 7543 3938 7544
3939 7543 3941 7547 3943 7548 3945 7554
3948 7556 3984 7536 3975 7513
TIME...MOT...LOC 2056Z 207DEG 24KT 3945 7544
$$
NJC011-015-033-272145-
/O.CON.KPHI.SV.W.0024.000000T0000Z-110427T2145Z/
SALEM NJ-CUMBERLAND NJ-GLOUCESTER NJ-
457 PM EDT WED APR 27 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR WEST CENTRAL GLOUCESTER...NORTHWESTERN CUMBERLAND AND SALEM
COUNTIES...
AT 454 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 NEWPORT MEADOWS...OR 15 MILES EAST OF MIDDLETOWN...
MOVING NORTHEAST AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
SALEM BY 510 PM EDT...
ALLOWAY BY 515 PM EDT...
WOODSTOWN BY 530 PM EDT...
MULLICA HILL...SWEDESBORO AND 6 MILES SOUTHEAST OF BECKETT BY 540
PM EDT...
LAT...LON 3934 7538 3938 7542 3937 7543 3938 7544
3939 7543 3941 7547 3943 7548 3945 7554
3948 7556 3984 7536 3975 7513
TIME...MOT...LOC 2056Z 207DEG 24KT 3945 7544
$$
TFG020
WWUS51 KPHI 272119
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
519 PM EDT WED APR 27 2011
NJC011-015-033-272129-
/O.CAN.KPHI.SV.W.0024.000000T0000Z-110427T2145Z/
SALEM NJ-CUMBERLAND NJ-GLOUCESTER NJ-
519 PM EDT WED APR 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR WEST CENTRAL GLOUCESTER...
NORTHWESTERN CUMBERLAND AND SALEM COUNTIES IS CANCELLED...
LAT...LON 3934 7538 3938 7542 3937 7543 3938 7544
3939 7543 3941 7547 3943 7548 3945 7554
3948 7556 3984 7536 3975 7513
TIME...MOT...LOC 2119Z 207DEG 24KT 3959 7535
$$
HEAVENERThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 1:48 PM EDT | Special Weather Statement | PHI | New Castle | 87 min |
| Apr 27, 4:16 PM EDT | Special Weather Statement | PHI | New Castle | 59 min |
| Apr 26, 10:01 PM EDT | Special Weather Statement | PHI | Carbon | 59 min |
| Apr 26, 10:55 PM EDT | Special Weather Statement | PHI | Monroe | 50 min |
| Apr 26, 11:10 PM EDT | Special Weather Statement | PHI | Berks | 65 min |
| Apr 26, 11:34 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Carbon | 56 min |
| Apr 26, 11:41 PM EDT | Special Weather Statement | PHI | Monroe | 64 min |
| Apr 26, 11:45 PM EDT | Special Weather Statement | PHI | Lehigh, Northampton | 60 min |
| Apr 27, 12:08 AM EDT | Special Weather Statement | PHI | Monroe, Northampton | 67 min |
| Apr 27, 12:34 AM EDT | Severe Thunderstorm Warning | PHI | Monroe, Northampton | 56 min |
| Apr 27, 1:19 AM EDT | Special Weather Statement | PHI | Bucks | 56 min |
| Apr 27, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Delaware, Montgomery, Philadelphia | 44 min |
| Apr 27, 3:26 PM EDT | Flash Flood Watch | PHI | Carbon, Lehigh, Monroe, Northampton | 24 hr |
| Apr 26, 9:25 PM EDT | Marine Dense Fog Advisory | PHI | 6 hr | |
| Apr 27, 12:43 AM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 62 min |
| Apr 27, 3:25 AM EDT | Special Weather Statement | PHI | Hunterdon, Morris | 65 min |
| Apr 27, 3:30 AM EDT | Flood Watch | PHI | Mercer, Middlesex, Morris, Somerset | 12 hr |
| Apr 27, 3:29 PM EDT | Special Weather Statement | PHI | Morris, Somerset | 61 min |
| Apr 27, 3:39 PM EDT | Severe Thunderstorm Warning | PHI | Morris, Somerset, Sussex | 66 min |
| Apr 27, 4:43 PM EDT | Special Weather Statement | PHI | Camden, Cumberland, Gloucester, Salem | 62 min |
| Apr 27, 4:50 PM EDT | Special Marine Warning | PHI | 12 min | |
| Apr 27, 5:22 PM EDT | Special Weather Statement | PHI | Burlington, Camden, Gloucester | 83 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2011Severe Thunderstorm Warnings in Delaware, 2011Severe Thunderstorm Warnings in Pennsylvania, 2011Every severe thunderstorm warning 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.