Alert archive / Pennsylvania / Severe Thunderstorm Watches in 1998
Severe Thunderstorm Watch 461
The Storm Prediction Center issued this severe thunderstorm watch at May 29, 1998, 5:00 PM EDT for 13 counties in New Jersey; 11 counties in New York; 20 counties in Pennsylvania. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 29, 1998, 5:00 PM EDT (21:00 UTC)
- Expired
- May 29, 1998, 11:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 44 counties
Bergen County, NJ, Essex County, NJ, Hudson County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Monmouth 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, Suffolk County, NY, Westchester County, NY, Berks County, PA, Bucks County, PA, Carbon County, PA, Columbia County, PA, Dauphin County, PA, Juniata County, PA, Lackawanna County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Monroe County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Pike County, PA, Schuylkill County, PA, Snyder County, PA, Wayne County, PA, Wyoming County, PA
The radar
The Philadelphia radar (KDIX), 131 km from the middle of the area, began a volume at 21:00 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
13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 5:06 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Montour, Northumberland | 64 min |
| May 29, 5:22 PM EDT | Severe Thunderstorm Warning | BGM | Pike | 78 min |
| May 29, 6:01 PM EDT | Severe Thunderstorm Warning | OKX | Putnam | 49 min |
| May 29, 6:11 PM EDT | Severe Thunderstorm Warning | OKX | Orange | 49 min |
| May 29, 6:11 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 49 min |
| May 29, 6:24 PM EDT | Severe Thunderstorm Warning | CTP | Schuylkill | 61 min |
| May 29, 6:28 PM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Franklin, Perry | 62 min |
| May 29, 6:42 PM EDT | Severe Thunderstorm Warning | CTP | Lebanon | 63 min |
| May 29, 6:43 PM EDT | Severe Thunderstorm Warning | PHI | Lehigh | 47 min |
| May 29, 6:59 PM EDT | Severe Thunderstorm Warning | CTP | Dauphin | 31 min |
| May 29, 7:20 PM EDT | Severe Thunderstorm Warning | OKX | Essex, Union | 45 min |
| May 29, 7:31 PM EDT | Severe Thunderstorm Warning | OKX | Hudson | 64 min |
| May 29, 7:31 PM EDT | Severe Thunderstorm Warning | OKX | Richmond | 64 min |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 9.0 hours before the alert went out and 158 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
- 24 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 704 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 103 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 29, 3:30 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr | |
| May 29, 7:15 PM EDT | Severe Thunderstorm Watch | SPC | Atlantic, Burlington, Camden, Cape May, Cumberland, Gloucester and 1 more | 6 hr |
| May 29, 12:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 24 more | 6 hr |
| May 29, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Bedford, Blair, Bradford and 33 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 1998Severe Thunderstorm Watches in New Jersey, 1998Severe Thunderstorm Watches in New York, 1998Every severe thunderstorm watch in 1998
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.