Alert archive / Michigan / Mesoscale Discussions in 2008
Mesoscale Discussion 2425
The Storm Prediction Center issued this mesoscale discussion at Dec 9, 2008, 6:26 AM EST for 14 counties in Michigan. It was in force for 3 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 9, 2008, 6:26 AM EST (11:26 UTC)
- Expired
- Dec 9, 2008, 9:30 AM EST
- In force
- 3 hr
- Issued by
- the Storm Prediction Center
Counties Bay County, MI, Clinton County, MI, Genesee County, MI, Gratiot County, MI, Huron County, MI, Ionia County, MI, Kent County, MI, Midland County, MI, Montcalm County, MI, Muskegon County, MI, Ottawa County, MI, Saginaw County, MI, Sanilac County, MI, Tuscola County, MI
The radar
The Detroit radar (KDTX), 99 km from the middle of the area, began a volume at 11:25 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, 11.4 hours before the alert went out and 99 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
- 591 m above ground
- 0-6 km bulk shear
- 68 kt
- 0-1 km storm-relative helicity
- 207 m²/s²
- 0-3 km storm-relative helicity
- 235 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
ACUS11 KWNS 091127
SWOMCD
SPC MCD 091126
MIZ000-091430-
MESOSCALE DISCUSSION 2425
NWS STORM PREDICTION CENTER NORMAN OK
0526 AM CST TUE DEC 09 2008
AREAS AFFECTED...CNTRL/LOWER MI
CONCERNING...FREEZING RAIN
VALID 091126Z - 091430Z
PRECIPITATION RATES WILL INCREASE ACROSS MI OVER THE NEXT FEW
HOURS...WITH A NARROW BAND OF FREEZING RAIN LIKELY ACROSS
CNTRL/LOWER MI. HERE RATES WILL BE NEAR 0.05 INCHES PER
HOUR...BEFORE TAPERING OFF TOWARDS 18Z.
RELATIVE LULL IN WINTER ACTIVITY WILL BE SHORT LIVED ACROSS MI AS
THE NEXT BATCH OF MOISTURE QUICKLY MOVES NEWD. TRAJECTORY OF MORE
SIGNIFICANT MOISTURE ACROSS NRN IL AND NERN MO WILL BRING IT TO
CNTRL/LOWER MI OVER THE NEXT FEW HOURS. ALTHOUGH THE WARM FRONT HAS
LIFTED NWD SLIGHTLY OVER THE PAST FOUR HOURS AND NOW RESIDES FROM
ABOUT A CHICAGO TO APPROXIMATELY DETROIT LINE...THE NWD MOVEMENT
WILL BE HALTED AS AN APPROACHING SHORT WAVE IN CNTRL MO AND ANOTHER
IN MN/NRN IA REINFORCE THE COLD AIR ACROSS NRN MI AND PROVIDE WEAK
LOW LEVEL FRONTOGENESIS. PROFILER DATA ALSO SHOWS A JET AXIS MOVING
NEWD WITH THE MO SHORT WAVE...WHICH WILL PLACE MI IN A FAVORABLE
REGION OF THE JET JUST AS THE GREATER MOISTURE BEGINS TO ENTER THE
AREA...ENHANCING ACTIVITY AT THE SURFACE. EXPECT THAT THE FREEZING
RAIN BAND WILL BE RELATIVELY NARROW GIVEN ABOVE FREEZING
TEMPERATURES IN SRN MI AND SUBFREEZING TEMPERATURES IN N.
HOWEVER...THIS NARROW BAND WILL LIKELY EXPERIENCE RATES NEAR OR
GREATER THAN 0.05 INCH PER HOUR. IN COLDER AREAS TO THE N...BRIEF
HEAVY SNOWFALL MAY BE POSSIBLE JUST TO THE N/COOL SIDE OF THE
FREEZING RAIN LINE.
..HURLBUT.. 12/09/2008
...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...
...NOTICE...
SPC WINTER WEATHER MESOSCALE DISCUSSIONS WILL BE ISSUED ON A
SCHEDULED BASIS FROM DECEMBER 1 THROUGH FEBRUARY 28...FOUR
TIMES A DAY...AROUND 00 UTC...06 UTC...12 UTC...AND 18 UTC
FOR SIGNIFICANT SHORT RANGE WINTER WEATHER EVENTS.
ATTN...WFO...DTX...GRR...
LAT...LON 43588231 43268280 42978376 42938545 42908627 43538656
43548603 43648471 44138280 43878250 43588231SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 8, 10:40 PM EST | Mesoscale Discussion | SPC | Barry, Calhoun, Clinton, Eaton, Genesee, Ingham and 11 more | 2 hr |
Nearby
Mesoscale Discussions in Michigan, 2008Every mesoscale discussion in 2008
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.