Alert archive / Ohio / Mesoscale Discussions in 2014

Mesoscale Discussion 1240

July 1, 2014Macomb County, Saint Clair County, Michigan; 26 counties in Ohio

The Storm Prediction Center issued this mesoscale discussion at Jul 1, 2014, 4:05 AM EDT for Macomb County, Saint Clair County, Michigan; 26 counties in Ohio. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Jul 1, 2014, 4:05 AM EDT (08:05 UTC)
Expired
Jul 1, 2014, 5:00 AM EDT
In force
55 min
Issued by
the Storm Prediction Center
All 28 counties

Macomb County, MI, Saint Clair County, MI, Ashland County, OH, Champaign County, OH, Clark County, OH, Crawford County, OH, Delaware County, OH, Erie County, OH, Fairfield County, OH, Franklin County, OH, Greene County, OH, Hancock County, OH, Hardin County, OH, Huron County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Lorain County, OH, Madison County, OH, Marion County, OH, Montgomery County, OH, Morrow County, OH, Ottawa County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Union County, OH, Wyandot County, OH

The radar

The Cleveland radar (KCLE), 81 km from the middle of the area, began a volume at 08:08 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

Detroit, MI (KDTX), launched 00:00Z, 8.1 hours before the alert went out and 147 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, Detroit, MI at 00:00Z on 2014-07-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1381 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, Detroit, MI at 00:00Z on 2014-07-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 50 square meters per square second.193958Sfc1 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
1381 J/kg
Mixed-layer CIN
-38 J/kg
Mixed-layer LCL
1064 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
50 m²/s²
0-3 km storm-relative helicity
70 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 30, 8:23 PM EDTSevere Thunderstorm WatchSPCAllegan, Arenac, Barry, Calhoun, Clare, Clinton and 25 more7 hr
Jun 30, 8:47 PM EDTMesoscale DiscussionSPCBerrien88 min
Jun 30, 9:44 PM EDTMesoscale DiscussionSPCBerrien31 min
Jun 30, 10:06 PM EDTMesoscale DiscussionSPCBarry, Calhoun, Cass, Clare, Clinton, Eaton and 10 more84 min
Jun 30, 11:35 PM EDTSevere Thunderstorm WatchSPCBerrien, Branch, Cass, Saint Joseph4 hr
Jul 1, 12:31 AM EDTMesoscale DiscussionSPCBranch, Cass, Kalamazoo, Saint Joseph89 min
Jul 1, 1:24 AM EDTMesoscale DiscussionSPCBranch, Calhoun, Eaton, Hillsdale, Ingham, Jackson and 7 more66 min
Jul 1, 1:44 AM EDTSevere Thunderstorm WatchSPCHillsdale, Lenawee, Livingston, Macomb, Monroe, Oakland and 3 more4 hr
Jul 1, 2:56 AM EDTMesoscale DiscussionSPCAdams, Auglaize, Brown, Butler, Champaign, Clark and 19 more64 min
Jul 1, 3:22 PM EDTMesoscale DiscussionSPCCarroll, Columbiana, Harrison, Jefferson, Mahoning, Stark and 1 more53 min
Jul 1, 5:43 PM EDTMesoscale DiscussionSPCBrown, Butler, Clermont, Hamilton, Warren92 min

Nearby

Mesoscale Discussions in Ohio, 2014Mesoscale Discussions in Michigan, 2014Every mesoscale discussion in 2014

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.