Alert archive / Pennsylvania / Mesoscale Discussions in 2016
Mesoscale Discussion 1547
The Storm Prediction Center issued this mesoscale discussion at Aug 16, 2016, 6:40 PM EDT for Allegany County, Garrett County, Maryland; 12 counties in Pennsylvania; 11 counties in West Virginia. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 16, 2016, 6:40 PM EDT (22:40 UTC)
- Expired
- Aug 16, 2016, 8:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 20%
All 25 counties
Allegany County, MD, Garrett County, MD, Bedford County, PA, Blair County, PA, Cambria County, PA, Centre County, PA, Clearfield County, PA, Fayette County, PA, Fulton County, PA, Huntingdon County, PA, Indiana County, PA, Mifflin County, PA, Somerset County, PA, Westmoreland County, PA, Barbour County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Marion County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Preston County, WV, Taylor County, WV, Tucker County, WV
The radar
The Pittsburgh radar (KPBZ), 118 km from the middle of the area, began a volume at 22:44 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 nearest sounding before it
Pittsburgh, PA (KAGC), launched 12:00Z, 10.7 hours before the alert went out and 102 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
- 46 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 1111 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 98 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 |
|---|---|---|---|---|
| Aug 16, 1:40 PM EDT | Mesoscale Discussion | SPC | Baltimore, Carroll, Frederick, Howard, Montgomery, Prince George's and 2 more | 2 hr |
| Aug 16, 3:20 PM EDT | Severe Thunderstorm Watch | SPC | Anne Arundel, Baltimore, Carroll, Cecil, Frederick, Harford and 6 more | 4 hr |
| Aug 16, 4:55 PM EDT | Mesoscale Discussion | SPC | Anne Arundel, Baltimore, Cecil, Harford, Howard, Kent and 3 more | 95 min |
| Aug 16, 2:57 PM EDT | Mesoscale Discussion | SPC | Beaver, Butler, Crawford, Erie, Lawrence, Mercer and 2 more | 2 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2016Mesoscale Discussions in West Virginia, 2016Mesoscale Discussions in Maryland, 2016Every mesoscale discussion in 2016
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.