Alert archive / Michigan / Mesoscale Discussions in 2011
Mesoscale Discussion 2113
The Storm Prediction Center issued this mesoscale discussion at Sep 3, 2011, 8:29 PM EDT for 12 counties in Indiana; 18 counties in Michigan; Fulton County, Williams County, Ohio. It was in force for 61 min.
The area
The outline as issued.
The facts
- Issued
- Sep 3, 2011, 8:29 PM EDT (00:29 UTC)
- Expired
- Sep 3, 2011, 9:30 PM EDT
- In force
- 61 min
- Issued by
- the Storm Prediction Center
All 32 counties
Cass County, IN, DeKalb County, IN, Elkhart County, IN, Fulton County, IN, Kosciusko County, IN, LaGrange County, IN, Marshall County, IN, Noble County, IN, Pulaski County, IN, Steuben County, IN, White County, IN, Whitley County, IN, Branch County, MI, Calhoun County, MI, Genesee County, MI, Hillsdale County, MI, Ingham County, MI, Jackson County, MI, Lapeer County, MI, Lenawee County, MI, Livingston County, MI, Macomb County, MI, Monroe County, MI, Oakland County, MI, Saint Clair County, MI, Saint Joseph County, MI, Sanilac County, MI, Shiawassee County, MI, Washtenaw County, MI, Wayne County, MI, Fulton County, OH, Williams County, OH
The radar
The Detroit radar (KDTX), 118 km from the middle of the area, began a volume at 00:32 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
Detroit, MI (KDTX), launched 00:00Z, 0.5 hours before the alert went out and 122 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
- 2681 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- 79 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
983
ACUS11 KWNS 040029
SWOMCD
SPC MCD 040029
MIZ000-OHZ000-INZ000-040130-
MESOSCALE DISCUSSION 2113
NWS STORM PREDICTION CENTER NORMAN OK
0729 PM CDT SAT SEP 03 2011
AREAS AFFECTED...NRN IND...SRN MI...FAR NWRN OH
CONCERNING...SEVERE THUNDERSTORM WATCH 829...
VALID 040029Z - 040130Z
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 829
CONTINUES.
THE THREAT OF DMGG WIND AND LARGE HAIL CONTINUES ACROSS NRN
IND...SRN MI...AND FAR NWRN OH. SEVERE THREAT SHOULD GRADUALLY
DIMINISH BY THE EXPIRATION TIME OF 04Z...AND AN ADDITIONAL WW WILL
LIKELY NOT BE NECESSARY.
WRN PORTIONS OF THE WW HAVE BEEN CANCELLED AS STABILIZATION HAS
OCCURRED IN A RAIN COOLED AIR MASS. GIVEN THE ONSET OF DIURNAL
COOLING...SURFACE-BASED CONVECTION IS BECOMING DECREASINGLY
EVIDENT...AND AS LOW-LEVEL LAPSE RATES CONTINUE TO WEAKEN...THE
THREAT OF DMGG WINDS WILL LESSEN OVER TIME. HOWEVER...A NARROW
CORRIDOR ACROSS NRN IND INTO SERN MI /WHERE HOT MAXIMUM TEMPERATURES
WERE OBSERVED/ STILL REMAINS SUFFICIENTLY UNSTABLE TO SUPPORT STRONG
TO SEVERE THUNDERSTORM DEVELOPMENT OVER THE NEXT HOUR OR TWO.
..HURLBUT.. 09/04/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...CLE...DTX...IWX...GRR...IND...
LAT...LON 40588709 40888693 41998573 42958421 43868263 43838217
43418218 42638273 42278316 41858341 41508418 40988594
40608624 40588709Nearby
Mesoscale Discussions in Michigan, 2011Mesoscale Discussions in Indiana, 2011Mesoscale Discussions in Ohio, 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.