Alert archive / New Jersey / Severe Thunderstorm Warnings in 2003
Severe Thunderstorm Warning 118, NWS Philadelphia/Mount Holly
NWS Philadelphia/Mount Holly issued this severe thunderstorm warning at Aug 17, 2003, 4:40 PM EDT for Mercer County, New Jersey. It was in force for 50 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 17, 2003, 4:40 PM EDT (20:40 UTC)
- Expired
- Aug 17, 2003, 5:30 PM EDT
- In force
- 50 min
- Issued by
- NWS Philadelphia/Mount Holly
- Area
- Whole counties
County Mercer County, NJ
The radar
The Philadelphia radar (KDIX), 45 km from the middle of the area, began a volume at 20:41 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
Wallops Is Stn, VA (KWAL), launched 12:00Z, 8.7 hours before the alert went out and 268 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
- 1663 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 509 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
839
WUUS51 KPHI 172040
SVRPHI
NJC021-172130-
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
437 PM EDT SUN AUG 17 2003
THE NATIONAL WEATHER SERVICE IN MOUNT HOLLY NJ HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
MERCER COUNTY IN CENTRAL NEW JERSEY.
* UNTIL 530 PM EDT.
* AT 431 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM... 7 MILES NORTHWEST OF HOPEWELL...MOVING SOUTH
AT 25 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
HOPEWELL AT 445 PM.
PENNINGTON...PRINCETON AT 450 PM.
LAWRENCEVILLE AT 455 PM.
MERCERVILLE-HAMILTON SQUARE AT 505 PM.
HAIL THE SIZE OF GOLFBALLS OR LARGER...AND WINDS AROUND 65
MILES AN HOUR...ARE EXPECTED FROM THIS STORM. THIS STORM HAS
BEEN SHOWING SIGNS OF CIRCULATION AT MID LEVELS WHICH IS A
SIGN OF A VERY STRONG SEVERE THUNDERSTORM. THIS STORM HAS HAD
A HISTORY OF DOWNING TREES AND DROPPING GOLF BALL SIZE
HAIL IN WARREN AND HUNTERDON COUNTIES.
SEEK SHELTER IN A STURDY STRUCTURE UNTIL THE STORM HAS PASSED.
FOR THE LATEST STORM INFORMATION...PLEASE TUNE TO NOAA WEATHER
RADIO...YOUR LOCAL RADIO OR TELEVISION STATION...OR YOUR CABLE
TELEVISION OUTLET.
$$
LAT...LON 4038 7470 4034 7462 4021 7458 4020 7476
4033 7483 4038 7487 4039 7481 4043 7476
TFGThe office that day
Everything else NWS Philadelphia/Mount Holly issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 17, 2:23 PM EDT | Special Marine Warning | PHI | 97 min | |
| Aug 17, 2:35 PM EDT | Special Marine Warning | PHI | 85 min | |
| Aug 17, 3:29 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Morris, Warren | 46 min |
| Aug 17, 3:46 PM EDT | Special Marine Warning | PHI | 89 min | |
| Aug 17, 4:12 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon, Somerset | 63 min |
| Aug 17, 5:32 PM EDT | Severe Thunderstorm Warning | PHI | Burlington, Monmouth | 43 min |
| Aug 17, 5:43 PM EDT | Severe Thunderstorm Warning | PHI | Ocean | 62 min |
| Aug 17, 6:14 PM EDT | Severe Thunderstorm Warning | PHI | Burlington | 61 min |
| Aug 17, 6:37 PM EDT | Severe Thunderstorm Warning | PHI | Monmouth | 53 min |
| Aug 17, 7:15 PM EDT | Special Marine Warning | PHI | 2 hr |
Nearby
Severe Thunderstorm Warnings in New Jersey, 2003Every severe thunderstorm warning in 2003
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.