Alert archive / New Jersey / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 147, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Jul 28, 2009, 5:09 PM EDT for Middlesex County, Somerset County, New Jersey. It was in force for 51 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
- Jul 28, 2009, 5:09 PM EDT (21:09 UTC)
- Expired
- Jul 28, 2009, 6:00 PM EDT
- In force
- 51 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Storm-based polygon
Counties Middlesex County, NJ, Somerset County, NJ
The radar
The Philadelphia radar (KDIX), 66 km from the middle of the area, began a volume at 21:09 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 |
|---|---|---|---|
| Jul 28, 5:30 PM EDT | TSTM WND DMG | East Brunswick, NJ | TREES AND WIRES 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 12:00Z, 9.2 hours before the alert went out and 127 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
- 345 J/kg
- Mixed-layer CIN
- -51 J/kg
- Mixed-layer LCL
- 1034 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS51 KPHI 282109
SVRPHI
NJC023-035-282200-
/O.NEW.KPHI.SV.W.0147.090728T2109Z-090728T2200Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
509 PM EDT TUE JUL 28 2009
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN MIDDLESEX COUNTY IN NORTHERN NEW JERSEY...
THIS INCLUDES THE CITIES OF...PERTH AMBOY...NEW BRUNSWICK...
CENTRAL SOMERSET COUNTY IN NORTHERN NEW JERSEY...
* UNTIL 600 PM EDT
* AT 508 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
NORTH BRUNSWICK...OR NEAR NEW BRUNSWICK...AND MOVING EAST AT 20
MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
SOMERSET AROUND 515 PM EDT...
NEW BRUNSWICK...EAST BRUNSWICK AND SOCIETY HILL AROUND 520 PM
EDT...
EDISON AROUND 535 PM EDT...
SAYREVILLE AROUND 540 PM EDT...
PERTH AMBOY AROUND 555 PM EDT...
LAT...LON 4056 7421 4055 7424 4051 7424 4048 7427
4044 7422 4039 7456 4054 7461 4060 7440
4060 7431 4059 7429 4060 7423 4059 7421
TIME...MOT...LOC 2109Z 255DEG 15KT 4046 7450
$$
IOVINO/COLLOW1 follow-up statement
000
WWUS51 KPHI 282132
SVSPHI
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
532 PM EDT TUE JUL 28 2009
NJC035-282142-
/O.CAN.KPHI.SV.W.0147.000000T0000Z-090728T2200Z/
SOMERSET NJ-
532 PM EDT TUE JUL 28 2009
...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL SOMERSET COUNTY
IS CANCELLED...
LAT...LON 4056 7421 4055 7424 4051 7424 4048 7427
4044 7422 4042 7434 4040 7449 4054 7445
4060 7431 4059 7429 4060 7423 4059 7421
TIME...MOT...LOC 2132Z 255DEG 15KT 4045 7440
$$
NJC023-282200-
/O.CON.KPHI.SV.W.0147.000000T0000Z-090728T2200Z/
MIDDLESEX NJ-
532 PM EDT TUE JUL 28 2009
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 600 PM EDT
FOR NORTHEASTERN MIDDLESEX COUNTY...
AT 530 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS
LOCATED NEAR EAST BRUNSWICK AND NEW BRUNSWICK...MOVING EAST AT 15
MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
EDISON BY 540 PM EDT...
SAYREVILLE BY 545 PM EDT...
MADISON PARK BY 550 PM EDT...
SOUTH AMBOY...LAURENCE HARBOR...PERTH AMBOY AND FORDS BY 555 PM
EDT...
LAT...LON 4056 7421 4055 7424 4051 7424 4048 7427
4044 7422 4042 7434 4040 7449 4054 7445
4060 7431 4059 7429 4060 7423 4059 7421
TIME...MOT...LOC 2132Z 255DEG 15KT 4045 7440
$$
IOVINO/COLLOWThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 28, 3:46 PM EDT | Small Craft Advisory | PHI | 43 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.