Alert archive / Ohio / Mesoscale Discussions in 2012
Mesoscale Discussion 185
The Storm Prediction Center issued this mesoscale discussion at Feb 29, 2012, 1:24 PM EST for Boyd County, Greenup County, Lawrence County, Kentucky; 21 counties in Ohio; 16 counties in West Virginia. It was in force for 36 min.
The area
The outline as issued.
The facts
- Issued
- Feb 29, 2012, 1:24 PM EST (18:24 UTC)
- Expired
- Feb 29, 2012, 2:00 PM EST
- In force
- 36 min
- Issued by
- the Storm Prediction Center
All 40 counties
Boyd County, KY, Greenup County, KY, Lawrence County, KY, Athens County, OH, Belmont County, OH, Carroll County, OH, Coshocton County, OH, Gallia County, OH, Guernsey County, OH, Harrison County, OH, Hocking County, OH, Jackson County, OH, Jefferson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Stark County, OH, Tuscarawas County, OH, Vinton County, OH, Washington County, OH, Boone County, WV, Cabell County, WV, Calhoun County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Marshall County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wayne County, WV, Wirt County, WV, Wood County, WV
The radar
The Charleston,WV radar (KRLX), 117 km from the middle of the area, began a volume at 18:27 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Cncnati-Daytn, OH (KILN), launched 12:00Z, 6.4 hours before the alert went out and 192 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
- 18 J/kg
- Mixed-layer CIN
- -228 J/kg
- Mixed-layer LCL
- 454 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 791 m²/s²
- 0-3 km storm-relative helicity
- 857 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.5
The text
As transmitted, in the capitals the NWS used until 2016.
663
ACUS11 KWNS 291824
SWOMCD
SPC MCD 291824
WVZ000-OHZ000-KYZ000-291900-
MESOSCALE DISCUSSION 0185
NWS STORM PREDICTION CENTER NORMAN OK
1224 PM CST WED FEB 29 2012
AREAS AFFECTED...ERN OH...WRN WV
CONCERNING...SEVERE POTENTIAL...WATCH NEEDED SOON
VALID 291824Z - 291900Z
A TORNADO WATCH WILL BE COORDINATED WITHIN THE NEXT HALF HOUR WITH
THE AFFECTED OFFICES.
DESTABILIZATION WILL CONTINUE IN THE PRESENCE OF STRONG LOW-LEVEL
AND DEEP-LAYER SHEAR /REF. 18Z WILMINGTON OH SOUNDING/. FAST-MOVING
LINE SEGMENTS AND SUPERCELLS WILL POSE A THREAT FOR DMGG WIND GUSTS
AND PERHAPS A FEW TORNADOES. SVR STORMS OVER KY WILL LIKELY MOVE
NEWD TOWARD WV DURING THE NEXT COUPLE OF HOURS...WITH ADDITIONAL
CONVECTION DEVELOPING ALONG AN APPROACHING FRONT /REF MESOSCALE
DISCUSSION 183/.
..COHEN.. 02/29/2012
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PBZ...RLX...CLE...JKL...ILN...
LAT...LON 40548059 39348069 38288131 37768207 38188307 39318278
40918146 40548059SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 29, 1:49 AM EST | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 56 min |
| Feb 29, 2:14 AM EST | Tornado Watch | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 11 hr |
| Feb 29, 3:40 AM EST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Boone and 63 more | 65 min |
| Feb 29, 4:53 AM EST | Mesoscale Discussion | SPC | Ballard, Caldwell, Calloway, Carlisle, Christian, Crittenden and 16 more | 97 min |
| Feb 29, 5:39 AM EST | Tornado Watch | SPC | Adair, Allen, Anderson, Barren, Bath, Bourbon and 54 more | 7 hr |
| Feb 29, 8:27 AM EST | Tornado Watch | SPC | Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 6 more | 5 hr |
| Feb 29, 8:38 AM EST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Boone and 70 more | 67 min |
| Feb 29, 9:07 AM EST | Mesoscale Discussion | SPC | Caldwell, Calloway, Carlisle, Christian, Crittenden, Fulton and 12 more | 53 min |
| Feb 29, 12:11 PM EST | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 61 more | 2 hr |
| Feb 29, 12:31 PM EST | Tornado Watch | SPC | Adair, Allen, Barren, Bath, Bell, Boyle and 59 more | 8 hr |
| Feb 29, 12:41 PM EST | Mesoscale Discussion | SPC | Boone, Bracken, Campbell, Gallatin, Grant, Kenton and 2 more | 3 hr |
| Feb 29, 1:37 PM EST | Tornado Watch | SPC | Boyd, Carter, Greenup, Lawrence, Lewis, Mason | 7 hr |
| Feb 29, 4:18 PM EST | Mesoscale Discussion | SPC | Boyd, Carter, Greenup, Lawrence, Lewis | 87 min |
| Feb 29, 4:34 PM EST | Mesoscale Discussion | SPC | Adair, Allen, Barren, Bath, Bell, Boyle and 48 more | 116 min |
| Feb 29, 3:23 PM EST | Mesoscale Discussion | SPC | Greenbrier, McDowell, Mercer, Monroe, Summers | 67 min |
| Feb 29, 3:43 PM EST | Tornado Watch | SPC | Greenbrier, Mercer, Monroe, Summers | 5 hr |
Nearby
Mesoscale Discussions in Ohio, 2012Mesoscale Discussions in West Virginia, 2012Mesoscale Discussions in Kentucky, 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.