Alert archive / Ohio / Mesoscale Discussions in 2010

Mesoscale Discussion 1149

June 27, 20108 counties in New York; 28 counties in Ohio; 15 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 27, 2010, 8:12 PM EDT for 8 counties in New York; 28 counties in Ohio; 15 counties in Pennsylvania. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
Jun 27, 2010, 8:12 PM EDT (00:12 UTC)
Expired
Jun 27, 2010, 9:45 PM EDT
In force
93 min
Issued by
the Storm Prediction Center
All 51 counties

Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Monroe County, NY, Wyoming County, NY, Ashland County, OH, Ashtabula County, OH, Carroll County, OH, Columbiana County, OH, Coshocton County, OH, Crawford County, OH, Cuyahoga County, OH, Erie County, OH, Geauga County, OH, Hardin County, OH, Holmes County, OH, Huron County, OH, Knox County, OH, Lake County, OH, Lorain County, OH, Mahoning County, OH, Marion County, OH, Medina County, OH, Morrow County, OH, Portage County, OH, Richland County, OH, Seneca County, OH, Stark County, OH, Summit County, OH, Trumbull County, OH, Tuscarawas County, OH, Wayne County, OH, Wyandot County, OH, Beaver County, PA, Butler County, PA, Cameron County, PA, Clarion County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Potter County, PA, Venango County, PA, Warren County, PA

The radar

The Pittsburgh radar (KPBZ), 103 km from the middle of the area, began a volume at 00:12 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

Buffalo Intl Airport, NY (KBUF), launched 00:00Z, 0.2 hours before the alert went out and 207 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, Buffalo Intl Airport, NY at 00:00Z on 2010-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 736 joules per kilogram.LCLLFCEL10008507005003002001001 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, Buffalo Intl Airport, NY at 00:00Z on 2010-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 213 square meters per square second.19395878Sfc1 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
736 J/kg
Mixed-layer CIN
-36 J/kg
Mixed-layer LCL
1039 m above ground
0-6 km bulk shear
69 kt
0-1 km storm-relative helicity
213 m²/s²
0-3 km storm-relative helicity
319 m²/s²
Significant tornado parameter
1.4
Supercell composite
6.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 28, 12:05 PM EDTMesoscale DiscussionSPCAllegany, Cattaraugus, Cayuga, Chautauqua, Cortland, Erie and 16 more55 min
Jun 28, 12:49 PM EDTMesoscale DiscussionSPCAlbany, Bronx, Columbia, Dutchess, Greene, Kings and 13 more56 min
Jun 28, 1:45 PM EDTSevere Thunderstorm WatchSPCBronx, Dutchess, Kings, Nassau, New York, Orange and 6 more6 hr
Jun 28, 3:53 PM EDTMesoscale DiscussionSPCBronx, Dutchess, Kings, Nassau, New York, Putnam and 5 more2 hr
Jun 28, 11:45 AM EDTMesoscale DiscussionSPCAllen, Cuyahoga, Erie, Geauga, Hancock, Henry and 12 more60 min
Jun 28, 12:26 PM EDTMesoscale DiscussionSPCAdams, Bedford, Cumberland, Dauphin, Franklin, Fulton and 6 more2 hr
Jun 28, 1:12 PM EDTSevere Thunderstorm WatchSPCAdams, Berks, Bucks, Carbon, Chester, Cumberland and 12 more7 hr

Nearby

Mesoscale Discussions in Ohio, 2010Mesoscale Discussions in Pennsylvania, 2010Mesoscale Discussions in New York, 2010Every mesoscale discussion in 2010

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.