Alert archive / Ohio / Mesoscale Discussions in 2011
Mesoscale Discussion 856
The Storm Prediction Center issued this mesoscale discussion at May 22, 2011, 2:51 PM EDT for 43 counties in Indiana; 14 counties in Kentucky; 57 counties in Ohio. It was in force for 54 min.
The area
The outline as issued.
The facts
- Issued
- May 22, 2011, 2:51 PM EDT (18:51 UTC)
- Expired
- May 22, 2011, 3:45 PM EDT
- In force
- 54 min
- Issued by
- the Storm Prediction Center
All 114 counties
Adams County, IN, Allen County, IN, Bartholomew County, IN, Blackford County, IN, Boone County, IN, Brown County, IN, Dearborn County, IN, Decatur County, IN, DeKalb County, IN, Delaware County, IN, Fayette County, IN, Franklin County, IN, Grant County, IN, Hamilton County, IN, Hancock County, IN, Hendricks County, IN, Henry County, IN, Howard County, IN, Huntington County, IN, Jackson County, IN, Jay County, IN, Jefferson County, IN, Jennings County, IN, Johnson County, IN, Madison County, IN, Marion County, IN, Monroe County, IN, Morgan County, IN, Ohio County, IN, Putnam County, IN, Randolph County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Shelby County, IN, Steuben County, IN, Switzerland County, IN, Tipton County, IN, Union County, IN, Wabash County, IN, Wayne County, IN, Wells County, IN, Whitley County, IN, Boone County, KY, Boyd County, KY, Bracken County, KY, Campbell County, KY, Carroll County, KY, Carter County, KY, Gallatin County, KY, Grant County, KY, Greenup County, KY, Kenton County, KY, Lewis County, KY, Mason County, KY, Pendleton County, KY, Trimble County, KY, Adams County, OH, Allen County, OH, Athens County, OH, Auglaize County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Crawford County, OH, Darke County, OH, Defiance County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Fulton County, OH, Gallia County, OH, Greene County, OH, Hamilton County, OH, Hancock County, OH, Hardin County, OH, Henry County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Knox County, OH, Lawrence County, OH, Licking County, OH, Logan County, OH, Madison County, OH, Marion County, OH, Meigs County, OH, Mercer County, OH, Miami County, OH, Montgomery County, OH, Morgan County, OH, Morrow County, OH, Muskingum County, OH, Paulding County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Putnam County, OH, Ross County, OH, Scioto County, OH, Seneca County, OH, Shelby County, OH, Union County, OH, Van Wert County, OH, Vinton County, OH, Warren County, OH, Williams County, OH, Wood County, OH, Wyandot County, OH
The radar
The Cincinnati radar (KILN), 44 km from the middle of the area, began a volume at 18:52 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, 6.9 hours before the alert went out and 44 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
- 460 J/kg
- Mixed-layer CIN
- -27 J/kg
- Mixed-layer LCL
- 720 m above ground
- 0-6 km bulk shear
- 31 kt
- 0-1 km storm-relative helicity
- 16 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
082
ACUS11 KWNS 221851
SWOMCD
SPC MCD 221851
OHZ000-WVZ000-KYZ000-MIZ000-INZ000-221945-
MESOSCALE DISCUSSION 0856
NWS STORM PREDICTION CENTER NORMAN OK
0151 PM CDT SUN MAY 22 2011
AREAS AFFECTED...CNTRL/ERN IND...WRN/SRN OH...FAR NRN KY
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 221851Z - 221945Z
AT LEAST A MARGINAL THREAT OF SEVERE HAIL/DAMAGING WIND AND PERHAPS
A TORNADO IS EXPECTED THIS AFTERNOON. ALTHOUGH SEVERE STORM COVERAGE
MAY REMAIN SPORADIC GIVEN AN ILL-DEFINED SYNOPTIC-SCALE FOCUS...A WW
ISSUANCE WILL LIKELY BE NEEDED BY 20Z.
A RECENT FLARE-UP IN TSTM ACTIVITY HAS OCCURRED ALONG AND N OF THE
OH VALLEY. OVERALL ENVIRONMENTAL SETUP DOES APPEAR SLIGHTLY MORE
MARGINAL RELATIVE TO AREAS WITHIN WW 324. NEVERTHELESS...A
MODERATELY UNSTABLE AIR MASS CHARACTERIZED BY MLCAPE OF 1000 TO 2000
J/KG AND MODERATE EFFECTIVE SHEAR OF 25 TO 35 KT...WILL SUPPORT
OCCASIONAL UPDRAFT ORGANIZATION. GIVEN BROAD LARGE-SCALE ASCENT
ASSOCIATED WITH THE UPPER MS VALLEY SHORT WAVE TROUGH...TSTM
COVERAGE SHOULD CONTINUE TO INCREASE TOWARDS THE UPPER OH VALLEY.
..GRAMS.. 05/22/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...PBZ...RLX...CLE...JKL...ILN...DTX...LMK...IWX...
IND...
LAT...LON 38678626 39648692 41198552 41658503 41818444 41778388
40998295 40718268 39998170 39408166 38918196 38318233
38098268 38548413 38548501 38678626SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 2:18 PM EDT | Severe Thunderstorm Watch | SPC | Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 4 more | 7 hr |
| May 22, 3:04 PM EDT | Tornado Watch | SPC | Benton, Jasper, Lake, Newton, Porter | 9 hr |
| May 22, 3:15 PM EDT | Mesoscale Discussion | SPC | Steuben | 60 min |
| May 22, 5:16 PM EDT | Mesoscale Discussion | SPC | Allen, Benton, Boone, Carroll, Cass, Clinton and 30 more | 119 min |
| May 22, 5:32 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Allen, Blackford, Carroll, Cass, Clinton and 27 more | 7 hr |
| May 22, 1:55 PM EDT | Mesoscale Discussion | SPC | Adair, Allen, Anderson, Barren, Bath, Bell and 64 more | 65 min |
| May 22, 4:44 PM EDT | Mesoscale Discussion | SPC | Bath, Bell, Bourbon, Boyd, Bracken, Breathitt and 44 more | 61 min |
| May 22, 5:40 PM EDT | Severe Thunderstorm Watch | SPC | Boyd, Carter, Greenup, Lawrence | 5 hr |
| May 22, 7:26 PM EDT | Mesoscale Discussion | SPC | Boyd, Carter, Elliott, Floyd, Greenup, Johnson and 4 more | 2 hr |
Nearby
Mesoscale Discussions in Ohio, 2011Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Kentucky, 2011Every mesoscale discussion in 2011
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.