Alert archive / Ohio / Mesoscale Discussions in 2017

Mesoscale Discussion 234

March 1, 20174 states

The Storm Prediction Center issued this mesoscale discussion at Mar 1, 2017, 2:19 AM EST for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Mar 1, 2017, 2:19 AM EST (07:19 UTC)
Expired
Mar 1, 2017, 3:45 AM EST
In force
86 min
Issued by
the Storm Prediction Center
Chance of a watch
5%
All 52 counties

Cattaraugus County, NY, Chautauqua County, NY, Ashland County, OH, Ashtabula County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Geauga County, OH, Guernsey County, OH, Harrison County, OH, Holmes County, OH, Huron County, OH, Jefferson County, OH, Knox County, OH, Licking County, OH, Lorain County, OH, Mahoning County, OH, Medina County, OH, Morrow County, OH, Muskingum County, OH, Portage County, OH, Richland County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Cambria County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest 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, Ohio County, WV

The radar

The Cleveland radar (KCLE), 83 km from the middle of the area, began a volume at 07:20 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

Pittsburgh, PA (KAGC), launched 00:00Z, 7.3 hours before the alert went out and 103 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.

Skew-T log-pSkew-T log-p diagram, Pittsburgh, PA at 00:00Z on 2017-03-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Pittsburgh, PA at 00:00Z on 2017-03-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 386 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
714 m above ground
0-6 km bulk shear
55 kt
0-1 km storm-relative helicity
386 m²/s²
0-3 km storm-relative helicity
392 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 1, 2:50 PM ESTMesoscale DiscussionSPCRichmond55 min
Feb 28, 7:00 PM ESTMesoscale DiscussionSPCDefiance, Fulton, Hancock, Henry, Lucas, Paulding and 4 more90 min
Feb 28, 7:37 PM ESTSevere Thunderstorm WatchSPCDefiance, Fulton, Henry, Lucas, Ottawa, Paulding and 3 more8 hr
Feb 28, 9:41 PM ESTMesoscale DiscussionSPCDefiance, Fulton, Henry, Lucas, Paulding, Williams and 1 more94 min
Feb 28, 11:03 PM ESTMesoscale DiscussionSPCAllen, Auglaize, Brown, Butler, Champaign, Clark and 36 more117 min
Feb 28, 11:29 PM ESTTornado WatchSPCAdams, Allen, Auglaize, Brown, Butler, Champaign and 34 more8 hr
Mar 1, 1:44 AM ESTMesoscale DiscussionSPCAllen, Auglaize, Darke, Defiance, Fulton, Hancock and 9 more61 min
Mar 1, 2:32 AM ESTMesoscale DiscussionSPCAdams, Athens, Brown, Clermont, Clinton, Gallia and 11 more88 min
Mar 1, 3:24 AM ESTSevere Thunderstorm WatchSPCAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more4 hr
Mar 1, 5:57 AM ESTTornado WatchSPCAdams, Brown, Butler, Clermont, Clinton, Fairfield and 9 more5 hr
Mar 1, 6:28 AM ESTMesoscale DiscussionSPCAdams, Gallia, Lawrence, Scioto2 hr
Mar 1, 6:48 AM ESTSevere Thunderstorm WatchSPCAthens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more5 hr
Mar 1, 8:28 AM ESTMesoscale DiscussionSPCGallia, Lawrence92 min
Mar 1, 3:56 PM ESTMesoscale DiscussionSPCAthens, Belmont, Carroll, Columbiana, Coshocton, Fairfield and 26 more2 hr
Mar 1, 9:44 AM ESTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Franklin, Fulton, Lancaster and 2 more91 min
Mar 1, 10:38 AM ESTSevere Thunderstorm WatchSPCAdams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 5 more4 hr
Mar 1, 12:25 PM ESTMesoscale DiscussionSPCAdams, Cumberland, Franklin, Fulton, York65 min
Mar 1, 12:50 PM ESTMesoscale DiscussionSPCBucks, Chester, Delaware, Montgomery, Philadelphia55 min
Mar 1, 1:13 PM ESTSevere Thunderstorm WatchSPCBerks, Bucks, Chester, Delaware, Montgomery, Philadelphia4 hr
Mar 1, 7:47 AM ESTSevere Thunderstorm WatchSPCBoone, Fayette, Lincoln, Logan, McDowell, Mingo and 3 more5 hr

Nearby

Mesoscale Discussions in Ohio, 2017Mesoscale Discussions in Pennsylvania, 2017Mesoscale Discussions in West Virginia, 2017Every mesoscale discussion in 2017

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.