Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2000
Severe Thunderstorm Watch 456
The Storm Prediction Center issued this severe thunderstorm watch at Jun 15, 2000, 2:15 PM EDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 15, 2000, 2:15 PM EDT (18:15 UTC)
- Expired
- Jun 15, 2000, 8:00 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Baltimore County, MD, Carroll County, MD, City of Baltimore, MD, Frederick County, MD, Howard County, MD, Montgomery County, MD, Prince George's County, MD, Washington County, MD, Adams County, PA, Bradford County, PA, Columbia County, PA, Cumberland County, PA, Dauphin County, PA, Franklin County, PA, Fulton County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster 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, Susquehanna County, PA, Union County, PA, Wyoming County, PA, York County, PA, Arlington County, VA, City of Alexandria, VA, City of Fairfax, VA, City of Falls Church, VA, City of Manassas, VA, City of Manassas Park, VA, City of Winchester, VA, Clarke County, VA, Fairfax County, VA, Fauquier County, VA, Frederick County, VA, Loudoun County, VA, Page County, VA, Prince William County, VA, Rappahannock County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Jefferson County, WV, Morgan County, WV
The radar
The Sterling radar (KLWX), 111 km from the middle of the area, began a volume at 18:16 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
20 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 15, 2:16 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 44 min |
| Jun 15, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Franklin | 65 min |
| Jun 15, 3:15 PM EDT | Severe Thunderstorm Warning | CTP | Mifflin | 45 min |
| Jun 15, 4:29 PM EDT | Severe Thunderstorm Warning | LWX | Frederick | 46 min |
| Jun 15, 4:44 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Loudoun | 46 min |
| Jun 15, 5:12 PM EDT | Severe Thunderstorm Warning | LWX | Loudoun | 48 min |
| Jun 15, 5:31 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, City of Winchester | 44 min |
| Jun 15, 5:31 PM EDT | Severe Thunderstorm Warning | LWX | Shenandoah | 44 min |
| Jun 15, 6:12 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery | 33 min |
| Jun 15, 6:17 PM EDT | Severe Thunderstorm Warning | LWX | Jefferson | 43 min |
| Jun 15, 6:19 PM EDT | Severe Thunderstorm Warning | LWX | Clarke, Fauquier, Loudoun | 41 min |
| Jun 15, 6:19 PM EDT | Severe Thunderstorm Warning | LWX | Frederick, City of Winchester | 41 min |
| Jun 15, 6:19 PM EDT | Severe Thunderstorm Warning | LWX | Warren | 41 min |
| Jun 15, 6:42 PM EDT | Tornado Warning | LWX | Clarke, Fauquier, Loudoun | 33 min |
| Jun 15, 7:10 PM EDT | Severe Thunderstorm Warning | LWX | Fairfax, Loudoun, City of Fairfax, City of Falls Church | 50 min |
| Jun 15, 7:22 PM EDT | Tornado Warning | LWX | Loudoun | 23 min |
| Jun 15, 7:22 PM EDT | Tornado Warning | LWX | Fairfax, City of Falls Church | 23 min |
| Jun 15, 7:22 PM EDT | Tornado Warning | LWX | City of Fairfax | 23 min |
| Jun 15, 7:34 PM EDT | Severe Thunderstorm Warning | LWX | Montgomery, Prince George's | 41 min |
| Jun 15, 7:34 PM EDT | Severe Thunderstorm Warning | LWX | City of Alexandria | 41 min |
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 6.3 hours before the alert went out and 113 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
- 59 J/kg
- Mixed-layer CIN
- -184 J/kg
- Mixed-layer LCL
- 598 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 91 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 |
|---|---|---|---|---|
| Jun 15, 12:30 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett | 6 hr |
| Jun 15, 6:00 PM EDT | Severe Thunderstorm Watch | SPC | Charles | 5 hr |
| Jun 15, 7:45 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 13 more | 5 hr |
| Jun 15, 1:30 PM EDT | Severe Thunderstorm Watch | SPC | Alleghany, Amherst, Augusta, Bath, Bedford, Bland and 40 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2000Severe Thunderstorm Watches in Virginia, 2000Severe Thunderstorm Watches in Maryland, 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; radar from the NEXRAD Level II archive.