Alert archive / Pennsylvania / Mesoscale Discussions in 2019
Mesoscale Discussion 852
The Storm Prediction Center issued this mesoscale discussion at May 28, 2019, 1:02 PM EDT for 5 states. It was in force for 118 min.
The area
The outline as issued.
The facts
- Issued
- May 28, 2019, 1:02 PM EDT (17:02 UTC)
- Expired
- May 28, 2019, 3:00 PM EDT
- In force
- 118 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 95%
All 95 counties
Kent County, DE, New Castle County, DE, Allegany County, MD, Anne Arundel County, MD, Baltimore County, MD, Caroline County, MD, Carroll County, MD, Cecil County, MD, City of Baltimore, MD, Frederick County, MD, Harford County, MD, Howard County, MD, Kent County, MD, Queen Anne's County, MD, Washington County, MD, Burlington County, NJ, Camden County, NJ, Cumberland County, NJ, Essex County, NJ, Gloucester County, NJ, Hunterdon County, NJ, Mercer County, NJ, Middlesex County, NJ, Morris County, NJ, Salem County, NJ, Somerset County, NJ, Sussex County, NJ, Union County, NJ, Warren County, NJ, Adams County, PA, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Berks County, PA, Blair County, PA, Bradford County, PA, Bucks County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Carbon County, PA, Centre County, PA, Chester County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Crawford County, PA, Cumberland County, PA, Dauphin County, PA, Delaware 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, Lehigh County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Mifflin County, PA, Monroe County, PA, Montgomery County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Perry County, PA, Philadelphia County, PA, Pike County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Wyoming County, PA, York County, PA, Berkeley County, WV, Morgan County, WV
The radar
The State College radar (KCCX), 64 km from the middle of the area, began a volume at 17:01 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 5.0 hours before the alert went out and 173 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
- 35 J/kg
- Mixed-layer CIN
- -149 J/kg
- Mixed-layer LCL
- 1167 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 293 m²/s²
- 0-3 km storm-relative helicity
- 414 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 1:48 PM EDT | Tornado Watch | SPC | Kent, New Castle, Sussex | 8 hr |
| May 28, 5:34 PM EDT | Mesoscale Discussion | SPC | Kent, New Castle, Sussex | 86 min |
| May 28, 4:43 PM EDT | Mesoscale Discussion | SPC | Burlington, Camden, Gloucester, Hunterdon, Mercer, Morris and 3 more | 2 hr |
| May 28, 6:08 PM EDT | Mesoscale Discussion | SPC | Bergen, Passaic, Sussex | 97 min |
| May 28, 1:22 PM EDT | Severe Thunderstorm Watch | SPC | Crawford, Erie | 7 hr |
| May 28, 3:24 PM EDT | Mesoscale Discussion | SPC | Crawford, Lawrence, Mercer | 2 hr |
| May 28, 12:08 AM EDT | Tornado Watch | SPC | Calhoun, Jackson, Pleasants, Ritchie, Roane, Tyler and 2 more | 4 hr |
| May 28, 2:03 AM EDT | Mesoscale Discussion | SPC | Pleasants, Ritchie, Tyler, Wirt, Wood | 117 min |
Nearby
Mesoscale Discussions in Pennsylvania, 2019Mesoscale Discussions in New Jersey, 2019Mesoscale Discussions in Maryland, 2019Every mesoscale discussion in 2019
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.