Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 312
The Storm Prediction Center issued this severe thunderstorm watch at May 18, 2000, 11:45 PM EDT for Jefferson County, Ohio; 33 counties in Pennsylvania; Hancock County, West Virginia. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 18, 2000, 11:45 PM EDT (03:45 UTC)
- Expired
- May 19, 2000, 5:00 AM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 35 counties
Jefferson County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Dauphin County, PA, Elk County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lackawanna County, PA, Lawrence County, PA, Lebanon County, PA, Luzerne County, PA, Lycoming County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Schuylkill County, PA, Snyder County, PA, Sullivan County, PA, Union County, PA, Venango County, PA, Westmoreland County, PA, Hancock County, WV
Warnings issued inside it
2 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 12:06 AM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 64 min |
| May 19, 12:19 AM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 61 min |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 3.8 hours before the alert went out and 121 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
- 18 J/kg
- Mixed-layer CIN
- -140 J/kg
- Mixed-layer LCL
- 2043 m above ground
- 0-6 km bulk shear
- 57 kt
- 0-1 km storm-relative helicity
- 175 m²/s²
- 0-3 km storm-relative helicity
- 188 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 18, 10:00 PM EDT | Tornado Watch | SPC | Allen, Auglaize, Darke, Defiance, Hancock, Hardin and 9 more | 5 hr |
| May 19, 2:00 PM EDT | Severe Thunderstorm Watch | SPC | Boone, Fayette, Greenbrier, Kanawha, Lincoln, Logan and 10 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2000Severe Thunderstorm Watches in Ohio, 2000Severe Thunderstorm Watches in West Virginia, 2000Every severe thunderstorm watch in 2000
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.