Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2020
Severe Thunderstorm Watch 449
The Storm Prediction Center issued this severe thunderstorm watch at Aug 25, 2020, 1:21 PM EDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 25, 2020, 1:21 PM EDT (17:21 UTC)
- Expired
- Aug 25, 2020, 7:23 PM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 123 counties
Broome County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Otsego County, NY, Schuyler County, NY, Steuben County, NY, Sullivan County, NY, Tioga County, NY, Tompkins County, NY, Ashland County, OH, Athens County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Delaware County, OH, Fairfield County, OH, Franklin County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Holmes County, OH, Jackson County, OH, Jefferson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Mahoning County, OH, Marion County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Richland County, OH, Ross County, OH, Scioto County, OH, Stark County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Wayne County, OH, Wyandot County, OH, Adams County, PA, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Bradford 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, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lackawanna County, PA, Lancaster County, PA, Lawrence County, PA, Lebanon County, PA, Luzerne County, PA, Lycoming County, PA, Mercer County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Pike County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Washington County, PA, Wayne County, PA, Westmoreland County, PA, Wyoming County, PA, York County, PA, Brooke County, WV, Doddridge County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Ritchie County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV
The radar
The Pittsburgh radar (KPBZ), 46 km from the middle of the area, began a volume at 17:25 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 5%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
40 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 1:36 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion | 39 min |
| Aug 25, 1:43 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Harrison, Tuscarawas | 32 min |
| Aug 25, 1:49 PM EDT | Severe Thunderstorm Warning | BGM | Broome, Chenango, Cortland, Tioga, Tompkins | 41 min |
| Aug 25, 1:53 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Tuscarawas | 52 min |
| Aug 25, 1:57 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Harrison, Muskingum, Tuscarawas | 48 min |
| Aug 25, 2:07 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Mercer, Venango | 38 min |
| Aug 25, 2:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler, Indiana, Westmoreland | 51 min |
| Aug 25, 2:15 PM EDT | Severe Thunderstorm Warning | BGM | Delaware, Otsego | 45 min |
| Aug 25, 2:23 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey, Harrison, Jefferson | 52 min |
| Aug 25, 2:26 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 23 min |
| Aug 25, 2:29 PM EDT | Severe Thunderstorm Warning | BGM | Broome, Delaware | 61 min |
| Aug 25, 2:34 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Indiana, Westmoreland | 41 min |
| Aug 25, 2:47 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton | 43 min |
| Aug 25, 2:57 PM EDT | Severe Thunderstorm Warning | BGM | Delaware | 33 min |
| Aug 25, 3:00 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Somerset | 75 min |
| Aug 25, 3:07 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey, Harrison, Jefferson, Noble | 38 min |
| Aug 25, 3:11 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Muskingum, Noble | 49 min |
| Aug 25, 3:14 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Morgan, Perry | 46 min |
| Aug 25, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Fayette, Indiana, Westmoreland | 45 min |
| Aug 25, 3:26 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Coshocton, Guernsey, Harrison, Muskingum, Noble and 1 more | 49 min |
| Aug 25, 3:39 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Monroe | 51 min |
| Aug 25, 3:49 PM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Hocking | 41 min |
| Aug 25, 3:49 PM EDT | Severe Thunderstorm Warning | CTP | Bedford | 56 min |
| Aug 25, 3:55 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Morgan, Perry | 65 min |
| Aug 25, 3:57 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Monroe, Muskingum, Noble | 29 min |
| Aug 25, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 32 min |
| Aug 25, 4:20 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Greene | 40 min |
| Aug 25, 4:21 PM EDT | Severe Thunderstorm Warning | CTP | Somerset | 84 min |
| Aug 25, 4:27 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Vinton | 33 min |
| Aug 25, 4:34 PM EDT | Severe Thunderstorm Warning | ILN | Fairfield, Hocking, Licking | 41 min |
| Aug 25, 4:37 PM EDT | Flash Flood Warning | RLX | Morgan, Perry | 3 hr |
| Aug 25, 4:45 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Meigs, Vinton | 45 min |
| Aug 25, 4:51 PM EDT | Severe Thunderstorm Warning | RLX | Ritchie, Wood | 39 min |
| Aug 25, 4:54 PM EDT | Severe Thunderstorm Warning | RLX | Barbour, Harrison, Randolph, Taylor | 36 min |
| Aug 25, 4:57 PM EDT | Severe Thunderstorm Warning | RLX | Athens, Meigs, Washington | 33 min |
| Aug 25, 5:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 29 min |
| Aug 25, 5:03 PM EDT | Severe Thunderstorm Warning | PBZ | Preston, Tucker | 42 min |
| Aug 25, 5:05 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Westmoreland | 25 min |
| Aug 25, 5:24 PM EDT | Severe Thunderstorm Warning | RLX | Calhoun, Jackson, Ritchie, Roane, Wirt | 51 min |
| Aug 25, 5:44 PM EDT | Severe Thunderstorm Warning | RLX | Gallia | 46 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 25, 12:48 AM EDT | Mesoscale Discussion | SPC | Erie, Franklin, Genesee, Jefferson, Lewis, Monroe and 6 more | 117 min |
| Aug 25, 12:02 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cattaraugus, Chemung, Chenango, Cortland and 8 more | 118 min |
| Aug 25, 2:09 PM EDT | Mesoscale Discussion | SPC | Albany, Columbia, Greene, Rensselaer, Saratoga, Schenectady and 1 more | 96 min |
| Aug 25, 3:12 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Bronx, Columbia, Dutchess, Greene, Kings and 11 more | 5 hr |
| Aug 25, 6:11 PM EDT | Mesoscale Discussion | SPC | Bronx, Dutchess, Kings, Nassau, New York, Orange and 6 more | 2 hr |
| Aug 25, 4:35 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Fairfield, Gallia, Hocking, Jackson and 8 more | 85 min |
| Aug 25, 7:07 PM EDT | Mesoscale Discussion | SPC | Gallia, Jackson, Lawrence, Meigs, Scioto | 113 min |
| Aug 25, 3:10 PM EDT | Mesoscale Discussion | SPC | Adams, Bucks, Chester, Delaware, Lancaster, Montgomery and 2 more | 95 min |
| Aug 25, 3:34 PM EDT | Severe Thunderstorm Watch | SPC | Berks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more | 7 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2020Severe Thunderstorm Watches in Ohio, 2020Severe Thunderstorm Watches in West Virginia, 2020Every severe thunderstorm watch in 2020
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.