Alert archive / New Jersey / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 792
The Storm Prediction Center issued this severe thunderstorm watch at Jul 21, 2003, 6:30 PM EDT for 11 counties in New Jersey; 10 counties in New York; 5 counties in Pennsylvania. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 21, 2003, 6:30 PM EDT (22:30 UTC)
- Expired
- Jul 21, 2003, 11:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 26 counties
Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Middlesex County, NJ, Morris County, NJ, Passaic County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Bronx County, NY, Kings County, NY, Nassau County, NY, New York County, NY, Orange County, NY, Putnam County, NY, Queens County, NY, Richmond County, NY, Rockland County, NY, Westchester County, NY, Bucks County, PA, Lehigh County, PA, Monroe County, PA, Northampton County, PA, Pike County, PA
The radar
The Philadelphia radar (KDIX), 124 km from the middle of the area, began a volume at 22:33 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.
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 6:43 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 62 min |
| Jul 21, 6:44 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 61 min |
| Jul 21, 7:07 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 53 min |
| Jul 21, 7:12 PM EDT | Severe Thunderstorm Warning | OKX | Orange | 78 min |
| Jul 21, 7:12 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 48 min |
| Jul 21, 7:26 PM EDT | Severe Thunderstorm Warning | PHI | Sussex, Warren | 79 min |
| Jul 21, 7:46 PM EDT | Severe Thunderstorm Warning | OKX | Passaic | 44 min |
| Jul 21, 7:54 PM EDT | Severe Thunderstorm Warning | PHI | Berks, Lehigh, Northampton | 81 min |
| Jul 21, 8:07 PM EDT | Severe Thunderstorm Warning | PHI | Morris | 83 min |
| Jul 21, 8:36 PM EDT | Severe Thunderstorm Warning | PHI | Hunterdon | 84 min |
| Jul 21, 9:01 PM EDT | Severe Thunderstorm Warning | PHI | Somerset | 89 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Brookhaven, NY (KOKX), launched 12:00Z, 10.5 hours before the alert went out and 150 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1382 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 113 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 21, 3:35 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr | |
| Jul 21, 7:51 PM EDT | Mesoscale Discussion | SPC | 84 min | |
| Jul 21, 1:15 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cattaraugus, Chemung, Schuyler, Steuben and 2 more | 2 hr |
| Jul 21, 1:40 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Chemung, Cortland, Schuyler, Steuben and 2 more | 6 hr |
| Jul 21, 2:46 PM EDT | Mesoscale Discussion | SPC | Albany, Columbia, Delaware, Greene, Montgomery, Otsego and 5 more | 119 min |
| Jul 21, 3:51 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Chemung, Cortland, Schuyler, Steuben and 2 more | 114 min |
| Jul 21, 8:40 AM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Butler, Clarion, Greene and 4 more | 5 hr |
Nearby
Severe Thunderstorm Watches in New Jersey, 2003Severe Thunderstorm Watches in New York, 2003Severe Thunderstorm Watches in Pennsylvania, 2003Every severe thunderstorm watch 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.