Alert archive / New Jersey / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 21, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Apr 27, 2011, 12:34 AM EDT for Morris County, Sussex County, Warren County, New Jersey; Monroe County, Northampton County, Pennsylvania. It was in force for 56 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
- Apr 27, 2011, 12:34 AM EDT (04:34 UTC)
- Expired
- Apr 27, 2011, 1:30 AM EDT
- In force
- 56 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Monroe County, PA, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 129 km from the middle of the area, began a volume at 04:35 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 |
|---|---|---|---|
| Apr 27, 12:35 AM EDT | TSTM WND DMG | East Stroudsburg, PA | TREES AND POWER LINES DOWN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 00:00Z, 4.6 hours before the alert went out and 159 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
- 15 J/kg
- Mixed-layer CIN
- -252 J/kg
- Mixed-layer LCL
- 541 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
819
WUUS51 KPHI 270434
SVRPHI
NJC027-037-041-PAC089-095-270530-
/O.NEW.KPHI.SV.W.0021.110427T0434Z-110427T0530Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1234 AM EDT WED APR 27 2011
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA...
EASTERN MONROE COUNTY IN NORTHEAST PENNSYLVANIA...
THIS INCLUDES THE CITY OF MOUNT POCONO...
NORTHERN MORRIS COUNTY IN NORTHERN NEW JERSEY...
SUSSEX COUNTY IN NORTHWEST NEW JERSEY...
THIS INCLUDES THE CITY OF NEWTON...
WARREN COUNTY IN NORTHWEST NEW JERSEY...
* UNTIL 130 AM EDT
* AT 1231 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
FROM MOUNTAINHOME TO STORMVILLE TO PEN ARGYL TO NAZARETH...OR ALONG
A LINE EXTENDING FROM 6 MILES NORTH OF MOUNT POCONO TO 12 MILES
SOUTHEAST OF MOUNT POCONO TO 15 MILES NORTH OF EASTON TO 6 MILES
WEST OF EASTON...AND MOVING EAST AT 45 MPH.
* SEVERE THUNDERSTORMS WILL BE NEAR...
ECHO LAKE...HARMONY AND COLUMBIA AROUND 1240 AM EDT...
ROXBURG...BLAIRSTOWN AND BELVIDERE AROUND 1245 AM EDT...
HOPE...FLATBROOKVILLE...WASHINGTON AND OXFORD AROUND 1250 AM 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 4120 7437 4109 7449 4104 7449 4105 7444
4101 7439 4100 7430 4089 7427 4090 7433
4086 7433 4069 7537 4096 7532 4124 7543
4126 7515 4116 7516 4115 7509 4109 7503
4112 7495 4127 7484 4135 7471
TIME...MOT...LOC 0433Z 253DEG 48KT 4121 7529 4099 7520
4091 7521 4072 7530
$$
HAYES3 follow-up statements
234
WWUS51 KPHI 270452
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
1252 AM EDT WED APR 27 2011
NJC027-037-041-PAC089-095-270530-
/O.CON.KPHI.SV.W.0021.000000T0000Z-110427T0530Z/
SUSSEX NJ-WARREN NJ-MORRIS NJ-NORTHAMPTON PA-MONROE PA-
1252 AM EDT WED APR 27 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM EDT
FOR EASTERN MONROE...NORTHEASTERN NORTHAMPTON...NORTHERN MORRIS...
WARREN AND SUSSEX COUNTIES...
AT 1248 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 16 MILES SOUTHWEST OF MONTAGUE TO 16 MILES SOUTHWEST
OF NEWTON TO 7 MILES EAST OF EASTON...MOVING EAST AT 45 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
FIVE POINTS...GREAT MEADOWS...GREAT MEADOWS-VIENNA AND CRANDON
LAKES BY 100 AM EDT...
NEWTON...HACKETTSTOWN...BEATTYESTOWN AND ANDOVER BY 105 AM EDT...
HAINESVILLE AND STANHOPE BY 110 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 4135 7471 4120 7438 4109 7449 4104 7449
4105 7444 4102 7442 4099 7430 4089 7427
4090 7433 4086 7433 4070 7536 4096 7532
4124 7543 4126 7516 4116 7516 4115 7509
4109 7501 4115 7491 4127 7484
TIME...MOT...LOC 0451Z 263DEG 38KT 4121 7503 4099 7495
4091 7496 4072 7506
$$
HAYES463
WWUS51 KPHI 270510
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
110 AM EDT WED APR 27 2011
PAC095-270519-
/O.CAN.KPHI.SV.W.0021.000000T0000Z-110427T0530Z/
NORTHAMPTON PA-
110 AM EDT WED APR 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NORTHAMPTON
COUNTY IS CANCELLED...
THE THUNDERSTORMS THAT PROMPTED THE WARNING HAVE EXITED THE AREA.
LAT...LON 4135 7471 4120 7438 4109 7449 4104 7449
4105 7444 4102 7442 4099 7430 4089 7427
4090 7433 4086 7433 4076 7500 4109 7501
4115 7491 4127 7484
TIME...MOT...LOC 0509Z 263DEG 38KT 4122 7477 4100 7470
4092 7471 4073 7481
$$
NJC027-037-041-PAC089-270530-
/O.CON.KPHI.SV.W.0021.000000T0000Z-110427T0530Z/
SUSSEX NJ-WARREN NJ-MORRIS NJ-MONROE PA-
110 AM EDT WED APR 27 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 130 AM EDT
FOR EXTREME EAST CENTRAL MONROE...NORTHERN MORRIS...NORTHEASTERN
WARREN AND SUSSEX COUNTIES...
AT 105 AM EDT...A LINE OF SEVERE THUNDERSTORMS WAS REPORTED CAPABLE
OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE
LOCATED ALONG A LINE EXTENDING FROM HAINESVILLE TO ANDOVER TO
STANHOPE TO 6 MILES SOUTH OF BEATTYESTOWN...MOVING EAST AT 45 MPH.
SEVERE THUNDERSTORMS WILL BE NEAR...
SUCCASUNNA AND MOUNT ARLINGTON BY 115 AM EDT...
WHARTON...SUSSEX...OGDENSBURG AND HAMBURG BY 120 AM EDT...
GREEN POND...WHITE MEADOW LAKE...VICTORY GARDENS AND ROCKAWAY BY
125 AM EDT...
PRECAUTIONARY/PREPAREDNESS ACTIONS...
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
&&
LAT...LON 4135 7471 4120 7438 4109 7449 4104 7449
4105 7444 4102 7442 4099 7430 4089 7427
4090 7433 4086 7433 4076 7500 4109 7501
4115 7491 4127 7484
TIME...MOT...LOC 0509Z 263DEG 38KT 4122 7477 4100 7470
4092 7471 4073 7481
$$
HAYES352
WWUS51 KPHI 270529
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
129 AM EDT WED APR 27 2011
NJC027-037-041-PAC089-270539-
/O.EXP.KPHI.SV.W.0021.000000T0000Z-110427T0530Z/
SUSSEX NJ-WARREN NJ-MORRIS NJ-MONROE PA-
129 AM EDT WED APR 27 2011
...THE SEVERE THUNDERSTORM WARNING FOR EXTREME EAST CENTRAL MONROE...
NORTHERN MORRIS...NORTHEASTERN WARREN AND SUSSEX COUNTIES WILL EXPIRE
AT 130 AM EDT...
THE STORMS THAT PROMPTED THE WARNING HAVE WEAKENED AND MOVED OUT OF
THE AREA.
LAT...LON 4135 7471 4120 7438 4109 7449 4104 7449
4105 7444 4102 7442 4099 7430 4089 7427
4090 7433 4086 7433 4076 7500 4109 7501
4115 7491 4127 7484
TIME...MOT...LOC 0529Z 263DEG 38KT 4123 7448 4101 7442
4093 7443 4074 7453
$$
HAYESThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 26, 9:25 PM EDT | Marine Dense Fog Advisory | PHI | 6 hr | |
| Apr 27, 12:08 AM EDT | Special Weather Statement | PHI | Morris, Sussex, Warren | 67 min |
| Apr 27, 12:43 AM EDT | Special Weather Statement | PHI | Hunterdon, Somerset | 62 min |
| Apr 27, 1:19 AM EDT | Special Weather Statement | PHI | Hunterdon, Mercer, Middlesex, Somerset | 56 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, 2:31 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Camden, Gloucester | 44 min |
| Apr 27, 3:26 PM EDT | Flash Flood Watch | PHI | Hunterdon, Mercer, Middlesex, Morris, Somerset, Sussex and 1 more | 24 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, 4:16 PM EDT | Special Weather Statement | PHI | Salem | 59 min |
| Apr 27, 4:43 PM EDT | Special Weather Statement | PHI | Camden, Cumberland, Gloucester, Salem | 62 min |
| Apr 27, 4:43 PM EDT | Severe Thunderstorm Warning | PHI | Cumberland, Gloucester, Salem | 36 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 |
| 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, 1:48 PM EDT | Special Weather Statement | PHI | Delaware, Montgomery, Philadelphia | 87 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.