Alert archive / Pennsylvania / Severe Thunderstorm Watches in 1997
Severe Thunderstorm Watch 253
The Storm Prediction Center issued this severe thunderstorm watch at May 6, 1997, 9:30 AM EDT for 6 counties in New York; 34 counties in Pennsylvania. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 6, 1997, 9:30 AM EDT (13:30 UTC)
- Expired
- May 6, 1997, 3:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 40 counties
Broome County, NY, Delaware County, NY, Greene County, NY, Sullivan County, NY, Tioga County, NY, Ulster County, NY, Adams County, PA, Bedford County, PA, Berks County, PA, Blair County, PA, Bradford County, PA, Carbon County, PA, Centre County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lebanon County, PA, Lehigh County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Monroe County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Pike County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Susquehanna County, PA, Union County, PA, Wayne County, PA, Wyoming County, PA, York County, PA
The radar
The State College radar (KCCX), 90 km from the middle of the area, began a volume at 13:26 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 9:55 AM EDT | Severe Thunderstorm Warning | CTP | Columbia | 50 min |
| May 6, 9:59 AM EDT | Severe Thunderstorm Warning | CTP | Snyder | 31 min |
| May 6, 10:08 AM EDT | Severe Thunderstorm Warning | CTP | Montour, Northumberland | 52 min |
| May 6, 10:08 AM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 52 min |
| May 6, 10:16 AM EDT | Severe Thunderstorm Warning | BGM | Luzerne, Wyoming | 59 min |
| May 6, 10:18 AM EDT | Severe Thunderstorm Warning | CTP | Dauphin, Schuylkill | 57 min |
| May 6, 10:28 AM EDT | Severe Thunderstorm Warning | CTP | Cumberland, Perry | 62 min |
| May 6, 11:07 AM EDT | Severe Thunderstorm Warning | PHI | Carbon, Monroe | 63 min |
| May 6, 11:11 AM EDT | Severe Thunderstorm Warning | BGM | Delaware | 64 min |
| May 6, 11:23 AM EDT | Severe Thunderstorm Warning | CTP | Lancaster | 67 min |
| May 6, 11:28 AM EDT | Severe Thunderstorm Warning | BGM | Sullivan | 62 min |
| May 6, 1:05 PM EDT | Severe Thunderstorm Warning | ALY | Greene | 45 min |
The nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 1.5 hours before the alert went out and 160 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
- 1321 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 112 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 6, 11:45 AM EDT | Severe Thunderstorm Watch | SPC | Bronx, Columbia, Dutchess, Kings, Nassau, New York and 7 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 1997Severe Thunderstorm Watches in New York, 1997Every severe thunderstorm watch in 1997
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.