Alert archive / Michigan / Mesoscale Discussions in 2011
Mesoscale Discussion 332
The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2011, 10:31 PM EDT for 26 counties in Michigan. It was in force for 89 min.
The area
The outline as issued.
The facts
- Issued
- Apr 3, 2011, 10:31 PM EDT (02:31 UTC)
- Expired
- Apr 4, 2011, 12:00 AM EDT
- In force
- 89 min
- Issued by
- the Storm Prediction Center
All 26 counties
Allegan County, MI, Barry County, MI, Calhoun County, MI, Cass County, MI, Clare County, MI, Clinton County, MI, Eaton County, MI, Gratiot County, MI, Ingham County, MI, Ionia County, MI, Isabella County, MI, Kalamazoo County, MI, Kent County, MI, Lake County, MI, Manistee County, MI, Mason County, MI, Mecosta County, MI, Midland County, MI, Montcalm County, MI, Muskegon County, MI, Newaygo County, MI, Oceana County, MI, Osceola County, MI, Ottawa County, MI, Saint Joseph County, MI, Van Buren County, MI
The radar
The Grand Rapids radar (KGRR), 23 km from the middle of the area, began a volume at 02:31 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, 2.5 hours before the alert went out and 185 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
- 921 m above ground
- 0-6 km bulk shear
- 77 kt
- 0-1 km storm-relative helicity
- 1052 m²/s²
- 0-3 km storm-relative helicity
- 1742 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
690
ACUS11 KWNS 040231
SWOMCD
SPC MCD 040231
MIZ000-040400-
MESOSCALE DISCUSSION 0332
NWS STORM PREDICTION CENTER NORMAN OK
0931 PM CDT SUN APR 03 2011
AREAS AFFECTED...WRN/CNTRL LWR MI
CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE
VALID 040231Z - 040400Z
ELEVATED THUNDERSTORM DEVELOPMENT WILL CONTINUE TO SPREAD EWD INTO
PORTIONS OF WRN/CNTRL LWR MI TONIGHT. A FEW OF THESE STORMS MAY BE
CAPABLE OF PRODUCING LARGE HAIL...AREA IS BEING MONITORED FOR A WW.
INTENSE LOW-LEVEL WAA REGIME FOCUSED OVER LWR MI IS OCCURRING WITHIN
EXIT REGION OF 70 KT LLJ CENTERED OVER IL. MESOSCALE ASCENT...IN
CONJUNCTION WITH INCREASING MOISTURE...AND MUCAPE VALUES AOA 1000
J/KG ROOTED BETWEEN 850-700 MB...IS FAVORING THE DEVELOPMENT OF E-W
BAND OF THUNDERSTORMS LOCATED FROM SRN WI EWD ACROSS LK MI INTO WRN
LWR MI. GIVEN STEEP 700-500 MB LAPSE RATES AOA 7 C/KM AND EFFECTIVE
SHEAR VALUES ABOVE 50 KT...STRONGER STORMS MAY BE CAPABLE OF
PRODUCING LARGE HAIL. CONVECTIVE TRENDS WILL BE MONITORED FOR
POSSIBLE WW.
..GARNER.. 04/04/2011
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
ATTN...WFO...DTX...APX...IWX...GRR...
LAT...LON 43208405 42068460 41828589 42098715 42898744 44128707
44348602 44108450 43208405SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 2:53 AM EDT | Mesoscale Discussion | SPC | Allegan, Barry, Berrien, Calhoun, Cass, Clare and 19 more | 97 min |
| Apr 4, 5:30 AM EDT | Severe Thunderstorm Watch | SPC | Branch, Hillsdale, Lenawee, Monroe | 8 hr |
Nearby
Mesoscale Discussions in Michigan, 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.