Alert archive / Indiana / Mesoscale Discussions in 2010
Mesoscale Discussion 821
The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2010, 9:47 PM EDT for 29 counties in Indiana; Branch County, Saint Joseph County, Michigan; 11 counties in Ohio. It was in force for 58 min.
The area
The outline as issued.
The facts
- Issued
- Jun 5, 2010, 9:47 PM EDT (01:47 UTC)
- Expired
- Jun 5, 2010, 10:45 PM EDT
- In force
- 58 min
- Issued by
- the Storm Prediction Center
All 42 counties
Adams County, IN, Allen County, IN, Blackford County, IN, Carroll County, IN, Cass County, IN, Clinton County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Grant County, IN, Howard County, IN, Huntington County, IN, Jay County, IN, Kosciusko County, IN, LaGrange County, IN, LaPorte County, IN, Marshall County, IN, Miami County, IN, Noble County, IN, Pulaski County, IN, Saint Joseph County, IN, Starke County, IN, Steuben County, IN, Tippecanoe County, IN, Tipton County, IN, Wabash County, IN, Wells County, IN, White County, IN, Whitley County, IN, Branch County, MI, Saint Joseph County, MI, Allen County, OH, Defiance County, OH, Fulton County, OH, Hancock County, OH, Henry County, OH, Mercer County, OH, Paulding County, OH, Putnam County, OH, Van Wert County, OH, Williams County, OH, Wood County, OH
The radar
The Northern Indiana radar (KIWX), 42 km from the middle of the area, began a volume at 01:49 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 00:00Z, 1.8 hours before the alert went out and 228 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
- 2440 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 829 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 6.5
The text
As transmitted, in the capitals the NWS used until 2016.
779
ACUS11 KWNS 060147
SWOMCD
SPC MCD 060147
OHZ000-MIZ000-INZ000-060245-
MESOSCALE DISCUSSION 0821
NWS STORM PREDICTION CENTER NORMAN OK
0847 PM CDT SAT JUN 05 2010
AREAS AFFECTED...NERN IND / NWRN OH / EXTREME SRN LOWER MICH
CONCERNING...SEVERE POTENTIAL...WATCH LIKELY
VALID 060147Z - 060245Z
A TORNADO WATCH IS LIKELY IN THE NEXT HOUR OR TWO DOWNSTREAM OF THE
ONGOING TORNADO WATCHES LOCATED IN IL AND NWRN IND. UPDRAFTS ARE
DEVELOPING IN NERN IND...IF THESE STORMS STRENGTHEN/DEEPEN AND
BECOME ORGANIZED...A TORNADO WATCH MAY BE NEEDED SOONER RATHER THAN
LATER TO ADDRESS AN ISOLD TORNADO THREAT ACROSS NERN IND...NWRN
OH...AND EXTREME SRN LOWER MICH.
LATEST VWP/VAD DATA FROM NRN IND SHOWS A VERY SUPPORTIVE SUPERCELL
WIND PROFILE /0-3 KM SRH 500 M2 PER S2/ IN PLACE ACROSS THE WARM
SECTOR OVER NRN IND S OF A WARM FRONT THAT IS LOCATED OVER SRN LOWER
MICH. KIWX RADAR IMAGERY SHOWS NEWLY DEVELOPED STORMS DEEPENING
WITH TIME...AS ECHO TOPS HAVE INCREASED IN HEIGHT AND LIGHTNING IS
NOW BEING OBSERVED AS OF 0135Z. THIS SMALL CLUSTER OF STORMS IS
LOCATED ALONG A DIFFUSE RESIDUAL BOUNDARY FROM PRIOR
CONVECTION....AND IS DELINEATING A WARM...MOIST AND UNSTABLE AIRMASS
TO THE S OVER IND AND A COOLER/LESS UNSTABLE AIRMASS IN SRN LOWER
MICH. IF THESE STORMS CONTINUE TO STRENGTHEN AND INCREASE IN
VIGOR...A TORNADO WATCH MAY BE NEEDED AS SOON AS IN THE NEXT
HOUR--CONDITIONAL ON THE NERN IND STORM DEVELOPMENT.
..SMITH.. 06/06/2010
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CLE...ILN...DTX...IWX...IND...LOT...
LAT...LON 40318735 41718678 41908647 41958500 41818364 41508344
41018344 40628410 40288534 40318735SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 5, 8:37 PM EDT | Tornado Watch | SPC | Benton, Jasper, Lake, Newton, Porter | 6 hr |
| Jun 5, 10:11 PM EDT | Tornado Watch | SPC | Adams, Allen, Blackford, Boone, Carroll, Cass and 48 more | 7 hr |
| Jun 6, 12:17 AM EDT | Mesoscale Discussion | SPC | Adams, Allen, Benton, Blackford, Boone, Carroll and 44 more | 118 min |
| Jun 6, 2:03 AM EDT | Tornado Watch | SPC | Fayette, Union, Wayne | 7 hr |
| Jun 6, 3:38 AM EDT | Mesoscale Discussion | SPC | Adams, Blackford, Boone, Clay, Clinton, Delaware and 24 more | 2 hr |
| Jun 6, 7:05 AM EDT | Mesoscale Discussion | SPC | Union | 115 min |
| Jun 5, 10:29 PM EDT | Mesoscale Discussion | SPC | Barry, Calhoun, Eaton, Ingham, Jackson, Kalamazoo and 3 more | 61 min |
| Jun 5, 11:12 PM EDT | Tornado Watch | SPC | Allegan, Barry, Calhoun, Eaton, Ingham, Jackson and 2 more | 2 hr |
| Jun 6, 12:30 AM EDT | Mesoscale Discussion | SPC | Ashland, Ashtabula, Crawford, Cuyahoga, Delaware, Erie and 14 more | 3 hr |
| Jun 6, 7:51 AM EDT | Tornado Watch | SPC | Adams, Athens, Belmont, Brown, Carroll, Clermont and 31 more | 7 hr |
Nearby
Mesoscale Discussions in Indiana, 2010Mesoscale Discussions in Ohio, 2010Mesoscale Discussions in Michigan, 2010Every mesoscale discussion in 2010
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.