Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2014
Severe Thunderstorm Watch 156
The Storm Prediction Center issued this severe thunderstorm watch at May 14, 2014, 7:01 PM EDT for 4 states. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- May 14, 2014, 7:01 PM EDT (23:01 UTC)
- Expired
- May 14, 2014, 10:40 PM EDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 41 counties
Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Niagara County, NY, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Monroe County, OH, Noble County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Wetzel County, WV
The radar
The Pittsburgh radar (KPBZ), 56 km from the middle of the area, began a volume at 23:01 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 7:08 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence, Mercer | 52 min |
| May 14, 7:26 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Harrison, Jefferson, Monroe | 49 min |
| May 14, 7:57 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Mercer, Venango | 48 min |
| May 14, 8:02 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey, Muskingum, Noble | 43 min |
| May 14, 8:10 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Muskingum | 50 min |
| May 14, 8:42 PM EDT | Severe Thunderstorm Warning | PBZ | Belmont, Guernsey, Harrison, Noble | 48 min |
| May 14, 8:45 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton, Guernsey, Harrison, Tuscarawas | 45 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 11.0 hours before the alert went out and 68 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
- 10 J/kg
- Mixed-layer CIN
- -164 J/kg
- Mixed-layer LCL
- 999 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 77 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 5:50 PM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Wyoming | 85 min |
| May 14, 11:37 AM EDT | Mesoscale Discussion | SPC | Adams, Ashland, Athens, Belmont, Brown, Carroll and 37 more | 53 min |
| May 14, 1:23 PM EDT | Tornado Watch | SPC | Adams, Ashland, Ashtabula, Athens, Belmont, Brown and 63 more | 9 hr |
| May 14, 3:07 PM EDT | Mesoscale Discussion | SPC | Adams, Ashland, Brown, Butler, Champaign, Clark and 37 more | 113 min |
| May 14, 1:48 PM EDT | Mesoscale Discussion | SPC | Armstrong, Cambria, Clarion, Clearfield, Elk, Fayette and 4 more | 117 min |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2014Severe Thunderstorm Watches in Ohio, 2014Severe Thunderstorm Watches in West Virginia, 2014Every severe thunderstorm watch in 2014
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.