Alert archive / Ohio / Mesoscale Discussions in 2012
Mesoscale Discussion 1395
The Storm Prediction Center issued this mesoscale discussion at Jul 4, 2012, 7:08 PM EDT for Monroe County, Wayne County, Michigan; 6 counties in Ohio. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 4, 2012, 7:08 PM EDT (23:08 UTC)
- Expired
- Jul 4, 2012, 9:15 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
Counties Monroe County, MI, Wayne County, MI, Erie County, OH, Lucas County, OH, Ottawa County, OH, Sandusky County, OH, Seneca County, OH, Wood County, OH
The radar
The Detroit radar (KDTX), 101 km from the middle of the area, began a volume at 23:10 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 12:00Z, 11.1 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
- 2763 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 1189 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- -7 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted, in the capitals the NWS used until 2016.
919
ACUS11 KWNS 042308
SWOMCD
SPC MCD 042308
OHZ000-MIZ000-050115-
MESOSCALE DISCUSSION 1395
NWS STORM PREDICTION CENTER NORMAN OK
0608 PM CDT WED JUL 04 2012
AREAS AFFECTED...SERN MI...NRN OH
CONCERNING...SEVERE THUNDERSTORM WATCH 462...
VALID 042308Z - 050115Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 462
CONTINUES.
SUMMARY...STORMS MAY PERSIST OVER SERN MI AND DRIFT SWD INTO N CNTRL
OH THIS EVENING WITH A WIND AND MARGINAL HAIL THREAT. AN ADDITIONAL
WATCH IS UNLIKELY AT THIS TIME.
DISCUSSION...CELLS ACROSS SERN MI AND SWRN ONTARIO HAVE CONSOLIDATED
INTO A CLUSTER...WITH OTHER CELLS FORMING ATOP THE LAKE BREEZE
ACROSS WRN LAKE ERIE. THESE STORMS MAY CONTINUE TO SLOWLY PROPAGATE
IN A SWD DIRECTION WHERE VERY WARM TEMPERATURES EXIST. DAMAGING
OUTFLOW WINDS MAY OCCUR...AND COULD AFFECT A SMALL AREA JUST S OF
THE EXISTING WATCH.
..JEWELL.. 07/04/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CLE...DTX...
LAT...LON 42438246 41828246 41668249 41378253 41108267 41088318
41268373 41548376 42058372 42288371 42448350 42558316
42438246SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 3:59 PM EDT | Mesoscale Discussion | SPC | Arenac, Bay, Clare, Genesee, Gladwin, Gratiot and 22 more | 91 min |
| Jul 4, 4:42 PM EDT | Severe Thunderstorm Watch | SPC | Bay, Clare, Clinton, Genesee, Gratiot, Ingham and 19 more | 5 hr |
| Jul 4, 4:57 PM EDT | Mesoscale Discussion | SPC | Baraga, Gogebic, Houghton, Iron, Keweenaw, Ontonagon | 93 min |
| Jul 4, 6:36 PM EDT | Mesoscale Discussion | SPC | Alger, Baraga, Delta, Dickinson, Iron, Luce and 4 more | 54 min |
| Jul 4, 8:38 AM EDT | Mesoscale Discussion | SPC | Ashtabula, Columbiana, Cuyahoga, Geauga, Lake, Mahoning and 3 more | 2 hr |
| Jul 4, 4:04 PM EDT | Mesoscale Discussion | SPC | Belmont, Carroll, Columbiana, Guernsey, Harrison, Jefferson and 2 more | 56 min |
| Jul 4, 4:26 PM EDT | Severe Thunderstorm Watch | SPC | Belmont, Guernsey, Monroe, Noble, Washington | 6 hr |
Nearby
Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in Michigan, 2012Every mesoscale discussion in 2012
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.