Alert archive / Ohio / Mesoscale Discussions in 2007
Mesoscale Discussion 1688
The Storm Prediction Center issued this mesoscale discussion at Aug 8, 2007, 6:23 PM EDT for 4 states. It was in force for 67 min.
The area
The outline as issued.
The facts
- Issued
- Aug 8, 2007, 6:23 PM EDT (22:23 UTC)
- Expired
- Aug 8, 2007, 7:30 PM EDT
- In force
- 67 min
- Issued by
- the Storm Prediction Center
All 48 counties
Allegany County, MD, Garrett County, MD, Athens County, OH, Belmont County, OH, Champaign County, OH, Clark County, OH, Clinton County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Hocking County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Miami County, OH, Monroe County, OH, Montgomery County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Ross County, OH, Shelby County, OH, Union County, OH, Warren County, OH, Washington County, OH, Fayette County, PA, Greene County, PA, Barbour County, WV, Doddridge County, WV, Grant County, WV, Hardy County, WV, Harrison County, WV, Marion County, WV, Marshall County, WV, Mineral County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Wetzel County, WV
The radar
The Pittsburgh radar (KPBZ), 144 km from the middle of the area, began a volume at 22:25 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.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 10.4 hours before the alert went out and 142 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
- 1832 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 753 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 83 m²/s²
- 0-3 km storm-relative helicity
- 121 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.7
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 2:53 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Garrett, Washington | 6 hr |
| Aug 8, 1:14 PM EDT | Mesoscale Discussion | SPC | Allen, Ashland, Auglaize, Belmont, Carroll, Champaign and 46 more | 91 min |
| Aug 8, 2:34 AM EDT | Mesoscale Discussion | SPC | Bedford, Berks, Blair, Bucks, Carbon, Cumberland and 12 more | 86 min |
Nearby
Mesoscale Discussions in Ohio, 2007Mesoscale Discussions in West Virginia, 2007Mesoscale Discussions in Maryland, 2007Every mesoscale discussion in 2007
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.