Alert archive / Ohio / Mesoscale Discussions in 2017
Mesoscale Discussion 384
The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2017, 7:05 PM EDT for 37 counties in Indiana; 39 counties in Ohio. It was in force for 55 min.
The area
The outline as issued.
The facts
- Issued
- Mar 30, 2017, 7:05 PM EDT (23:05 UTC)
- Expired
- Mar 30, 2017, 8:00 PM EDT
- In force
- 55 min
- Issued by
- the Storm Prediction Center
All 76 counties
Adams County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Daviess County, IN, Dearborn County, IN, Decatur County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Greene County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Jackson County, IN, Jay County, IN, Jennings County, IN, Johnson County, IN, Lawrence County, IN, Madison County, IN, Marion County, IN, Martin County, IN, Monroe County, IN, Morgan County, IN, Owen County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Shelby County, IN, Tipton County, IN, Union County, IN, Wayne County, IN, Wells County, IN, Allen County, OH, Auglaize County, OH, Butler County, OH, Carroll County, OH, Champaign County, OH, Clark County, OH, Coshocton County, OH, Crawford County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Guernsey County, OH, Hardin County, OH, Harrison County, OH, Holmes County, OH, Knox County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morrow County, OH, Muskingum County, OH, Perry County, OH, Pickaway County, OH, Preble County, OH, Putnam County, OH, Richland County, OH, Shelby County, OH, Tuscarawas County, OH, Union County, OH, Van Wert County, OH, Warren County, OH, Wyandot County, OH
The radar
The Cincinnati radar (KILN), 56 km from the middle of the area, began a volume at 23:08 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
Cncnati-Daytn, OH (KILN), launched 12:00Z, 11.1 hours before the alert went out and 57 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1598 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 542 m²/s²
- 0-3 km storm-relative helicity
- 520 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted.
005
ACUS11 KWNS 302305
SWOMCD
SPC MCD 302305
OHZ000-INZ000-310000-
Mesoscale Discussion 0384
NWS Storm Prediction Center Norman OK
0605 PM CDT Thu Mar 30 2017
Areas affected...Portions of Indiana and Ohio
Concerning...Tornado Watch 104...
Valid 302305Z - 310000Z
The severe weather threat for Tornado Watch 104 continues.
SUMMARY...An occasional damaging-wind risk will exist across
portions of southern/central Indiana over the next couple of hours
before diminishing this evening. A low-end tornado threat may also
persist in the near term close to the warm front across central
Indiana and Ohio.
DISCUSSION...A broken band of thunderstorms continues east across
central/southern Indiana this evening, aided by downstream
propagation within a relatively dry/well-mixed low-level
environment. This thermodynamic profile, combined with ample
uni-directional southwesterly flow, will maintain some damaging-wind
risk with small bowing segments through the early/mid evening hours.
However, due to the dry near-surface profile, diabatic cooling
should quickly render a stabilizing boundary layer, reducing the
threat for gusty/damaging winds.
Farther northeast, a very narrow corridor exists for low-end tornado
potential at the warm front. Here, backed surface flow yields more
notable veering with height, which may briefly yield low-level
mesocyclones and a quick uptick in tornadic potential. However,
similar to the damaging-wind risk, this threat should diminish
further over the next few hours.
Lastly, a gradual increase in large-scale ascent over Ohio has
yielded a few strong/briefly severe cells rooted above the surface.
Despite relatively narrow buoyancy profiles, strong effective shear
may continue to be sufficient for isolated instances of marginally
severe hail this evening. However, due to the low-end nature of the
threat, watch issuance is not expected.
..Picca.. 03/30/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PBZ...RLX...CLE...ILN...LMK...IWX...IND...
LAT...LON 38608726 40558623 41058419 40718117 40488083 39728154
39368429 38738600 38608726SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 30, 1:31 PM EDT | Severe Thunderstorm Watch | SPC | Gibson, Posey | 7 hr |
| Mar 30, 1:55 PM EDT | Mesoscale Discussion | SPC | Bartholomew, Boone, Brown, Clark, Clay, Clinton and 54 more | 2 hr |
| Mar 30, 3:03 PM EDT | Tornado Watch | SPC | Adams, Bartholomew, Blackford, Boone, Brown, Carroll and 42 more | 5 hr |
| Mar 30, 4:27 PM EDT | Mesoscale Discussion | SPC | Blackford, Boone, Brown, Clay, Clinton, Daviess and 36 more | 33 min |
| Mar 30, 6:40 PM EDT | Mesoscale Discussion | SPC | Clark, Crawford, Dubois, Floyd, Gibson, Harrison and 7 more | 65 min |
Nearby
Mesoscale Discussions in Ohio, 2017Mesoscale Discussions in Indiana, 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.