Alert archive / Ohio / Mesoscale Discussions in 2021
Mesoscale Discussion 1750
The Storm Prediction Center issued this mesoscale discussion at Sep 14, 2021, 7:46 PM EDT for 14 counties in Indiana; 5 counties in Michigan; 34 counties in Ohio. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Sep 14, 2021, 7:46 PM EDT (23:46 UTC)
- Expired
- Sep 14, 2021, 9:15 PM EDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
All 53 counties
Adams County, IN, Allen County, IN, Blackford County, IN, DeKalb County, IN, Delaware County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Miami County, IN, Randolph County, IN, Wabash County, IN, Wells County, IN, Whitley County, IN, Lenawee County, MI, Macomb County, MI, Monroe County, MI, Washtenaw County, MI, Wayne County, MI, Allen County, OH, Auglaize County, OH, Champaign County, OH, Clark County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Erie County, OH, Fulton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Huron County, OH, Logan County, OH, Lorain County, OH, Lucas County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Morrow County, OH, Ottawa County, OH, Paulding County, OH, Putnam County, OH, Richland County, OH, Sandusky County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH
The radar
The Northern Indiana radar (KIWX), 143 km from the middle of the area, began a volume at 23:48 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.8 hours before the alert went out and 183 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
- 772 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 977 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 51 m²/s²
- 0-3 km storm-relative helicity
- 90 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
224
ACUS11 KWNS 142347
SWOMCD
SPC MCD 142346
OHZ000-MIZ000-INZ000-150115-
Mesoscale Discussion 1750
NWS Storm Prediction Center Norman OK
0646 PM CDT Tue Sep 14 2021
Areas affected...Southeast Michigan...northern Indiana...and
northwest Ohio
Concerning...Severe potential...Watch unlikely
Valid 142346Z - 150115Z
Probability of Watch Issuance...20 percent
SUMMARY...An isolated severe threat may continue, but no watch is
expected.
DISCUSSION...Severe reports have been sporadic across watch 498 this
afternoon due to the limited intensity and storm coverage across the
region. The boundary layer has started to cool ahead of these storms
as the sun sets. Continued boundary-layer cooling and increasing
inhibition should limit storm intensity east of watch 498. Isolated
strong to severe storms remain possible, but a more organized threat
is not expected and therefore, no downstream watch is anticipated.
..Bentley/Edwards.. 09/14/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CLE...ILN...DTX...IWX...GRR...IND...
LAT...LON 40558628 40808612 42418377 42898234 42158266 41898264
41588214 40558242 40218280 40218280 39818342 40058552
40368606 40558628SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 14, 2:12 PM EDT | Mesoscale Discussion | SPC | Allen, DeKalb, Elkhart, Fulton, Huntington, Kosciusko and 9 more | 2 hr |
| Sep 14, 3:08 PM EDT | Severe Thunderstorm Watch | SPC | Allen, Blackford, Cass, DeKalb, Elkhart, Fulton and 16 more | 7 hr |
| Sep 14, 4:18 PM EDT | Mesoscale Discussion | SPC | Benton, Newton, Warren | 117 min |
| Sep 14, 6:04 PM EDT | Mesoscale Discussion | SPC | Adams, Allen, Blackford, Carroll, Cass, DeKalb and 15 more | 86 min |
Nearby
Mesoscale Discussions in Ohio, 2021Mesoscale Discussions in Indiana, 2021Mesoscale Discussions in Michigan, 2021Every mesoscale discussion in 2021
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.