Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 124, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 17, 2009, 5:41 PM EDT for Morris County, Sussex County, Warren County, New Jersey; Northampton County, Pennsylvania. It was in force for 52 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
- Jul 17, 2009, 5:41 PM EDT (21:41 UTC)
- Expired
- Jul 17, 2009, 6:33 PM EDT
- In force
- 52 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Morris County, NJ, Sussex County, NJ, Warren County, NJ, Northampton County, PA
The radar
The Philadelphia radar (KDIX), 119 km from the middle of the area, began a volume at 21:43 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
Brookhaven, NY (KOKX), launched 12:00Z, 9.7 hours before the alert went out and 172 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
- 95 J/kg
- Mixed-layer CIN
- -122 J/kg
- Mixed-layer LCL
- 1120 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- -28 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS51 KPHI 172141 SVRPHI NJC027-037-041-PAC095-172245- /O.NEW.KPHI.SV.W.0124.090717T2141Z-090717T2245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 541 PM EDT FRI JUL 17 2009 THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN NORTHAMPTON COUNTY IN EASTERN PENNSYLVANIA... WESTERN MORRIS COUNTY IN NORTHERN NEW JERSEY... SOUTHWESTERN SUSSEX COUNTY IN NORTHWEST NEW JERSEY... THIS INCLUDES THE CITY OF NEWTON... WARREN COUNTY IN NORTHWEST NEW JERSEY... * UNTIL 645 PM EDT * AT 540 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR HARMONY...OR NEAR EASTON...AND MOVING NORTHEAST AT 30 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ROXBURG...PLEASANT VALLEY...BRASS CASTLE...BELVIDERE... WASHINGTON...OXFORD...HOPE...GREAT MEADOWS...GREAT MEADOWS-VIENNA...BLAIRSTOWN...HACKETTSTOWN...ALLAMUCHY... ALLAMUCHY-PANTHER VALLEY...BUDD LAKE...STANHOPE...FIVE POINTS... ANDOVER...HOPATCONG AND LAKE MOHAWK PRECAUTIONARY/PREPAREDNESS ACTIONS... HAIL UP TO THE SIZE OF A QUARTER HAS BEEN REPORTED IN FORK TOWNSHIP WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY. && LAT...LON 4117 7478 4097 7454 4066 7514 4075 7529 TIME...MOT...LOC 2141Z 233DEG 25KT 4073 7515 $$ MPD
2 follow-up statements
000
WWUS51 KPHI 172201
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
601 PM EDT FRI JUL 17 2009
PAC095-172209-
/O.CAN.KPHI.SV.W.0124.000000T0000Z-090717T2245Z/
NORTHAMPTON PA-
601 PM EDT FRI JUL 17 2009
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN NORTHAMPTON
COUNTY IS CANCELLED...
LAT...LON 4077 7505 4084 7504 4091 7507 4117 7478
4097 7454
TIME...MOT...LOC 2159Z 233DEG 25KT 4080 7502
$$
NJC027-037-041-172245-
/O.CON.KPHI.SV.W.0124.000000T0000Z-090717T2245Z/
SUSSEX NJ-WARREN NJ-MORRIS NJ-
601 PM EDT FRI JUL 17 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 645 PM EDT
FOR NORTH CENTRAL MORRIS...NORTHEASTERN WARREN AND SOUTHWESTERN
SUSSEX COUNTIES...
AT 559 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 JUST NORTHWEST OF OXFORD...OR ABOUT 15 MILES NORTHEAST OF
EASTON...MOVING NORTHEAST AT 30 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HOPE...
GREAT MEADOWS...GREAT MEADOWS-VIENNA...BLAIRSTOWN...ALLAMUCHY...
ALLAMUCHY-PANTHER VALLEY...STANHOPE...FIVE POINTS...ANDOVER...
HOPATCONG...NEWTON AND LAKE MOHAWK
PRECAUTIONARY/PREPAREDNESS ACTIONS...
DAMAGING WINDS UP TO AROUND 60 MPH WERE REPORTED NEAR EASTON WITH
THIS STORM. THIS IS A DANGEROUS STORM...SEEK SAFE SHELTER AND STAY
AWAY FROM WINDOWS
HAIL UP TO THE SIZE OF QUARTERS HAS BEEN REPORTED IN FORKS TOWNSHIP
WITH THIS STORM. IF YOU ARE IN THE PATH OF THE STORM...TAKE
IMMEDIATE ACTION TO PROTECT LIFE AND PROPERTY.
&&
LAT...LON 4077 7505 4084 7504 4091 7507 4117 7478
4097 7454
TIME...MOT...LOC 2159Z 233DEG 25KT 4080 7502
$$
MPD000
WWUS51 KPHI 172233
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
633 PM EDT FRI JUL 17 2009
NJC027-037-041-172244-
/O.CAN.KPHI.SV.W.0124.000000T0000Z-090717T2245Z/
SUSSEX NJ-WARREN NJ-MORRIS NJ-
633 PM EDT FRI JUL 17 2009
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN MORRIS...
NORTHEASTERN WARREN AND SOUTHWESTERN SUSSEX COUNTIES IS CANCELLED...
LAT...LON 4077 7505 4084 7504 4091 7507 4117 7478
4097 7454
TIME...MOT...LOC 2234Z 233DEG 25KT 4095 7476
$$
MPDThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 17, 6:25 PM EDT | Areal Flood Advisory | PHI | Salem | 113 min |
| Jul 17, 7:33 PM EDT | Areal Flood Advisory | PHI | Gloucester, Salem | 86 min |
| Jul 17, 6:10 PM EDT | Severe Thunderstorm Warning | PHI | Chester | 80 min |
| Jul 17, 7:07 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Bucks, Lehigh, Montgomery | 53 min |
| Jul 17, 7:22 PM EDT | Severe Thunderstorm Warning | PHI | Bucks, Chester, Delaware, Montgomery, Philadelphia | 53 min |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2009Severe Thunderstorm Warnings in Pennsylvania, 2009Every severe thunderstorm warning in 2009
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.