Alert archive / Michigan / Mesoscale Discussions in 2008
Mesoscale Discussion 577
The Storm Prediction Center issued this mesoscale discussion at Apr 7, 2008, 3:20 PM EDT for 23 counties in Michigan. It was in force for 2 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2008, 3:20 PM EDT (19:20 UTC)
- Expired
- Apr 7, 2008, 5:45 PM EDT
- In force
- 2 hr
- Issued by
- the Storm Prediction Center
All 23 counties
Alcona County, MI, Alpena County, MI, Antrim County, MI, Arenac County, MI, Bay County, MI, Cheboygan County, MI, Clare County, MI, Crawford County, MI, Emmet County, MI, Gladwin County, MI, Gratiot County, MI, Iosco County, MI, Isabella County, MI, Kalkaska County, MI, Midland County, MI, Missaukee County, MI, Montmorency County, MI, Ogemaw County, MI, Oscoda County, MI, Otsego County, MI, Roscommon County, MI, Saginaw County, MI, Tuscola County, MI
The radar
The NCL Michigan radar (KAPX), 88 km from the middle of the area, began a volume at 19:23 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
Alpena, MI (KAPX), launched 12:00Z, 7.3 hours before the alert went out and 165 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
- 1006 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 208 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 071921 SWOMCD SPC MCD 071920 MIZ000-072145- MESOSCALE DISCUSSION 0577 NWS STORM PREDICTION CENTER NORMAN OK 0220 PM CDT MON APR 07 2008 AREAS AFFECTED...NE LOWER MI CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY VALID 071920Z - 072145Z THUNDERSTORMS...SOME PRODUCING SMALL HAIL AND/OR STRONG GUSTY WINDS EXPECTED TO DEVELOP NEXT 1 TO 2 HOURS. WITH MAXIMUM AFTERNOON HEATING TIME NEARING...SATELLITE INDICATES ENHANCED CU FIELD OVER NE LOWER MI AS COMPACT/INTENSE UPPER LOW AND ASSOCIATED JET CROSS INTO LOWER MI. TEMPERATURES HAVE WARMED INTO THE MID 50S TO LOW 60S ALTHOUGH MOISTURE REMAINS LIMITED WITH SURFACE DEWPOINTS MAINLY IN THE 40S. SBCAPES FORECAST AROUND 500 J/KG AT PEAK AFTERNOON HEATING. UPPER SYSTEM IS FORECAST TO MOVE RAPIDLY NORTHEASTWARD ACROSS THE AREA. THUS...AT THIS TIME...EXPECT THUNDERSTORMS WITH SOME SMALL HAIL AND GUSTY WINDS ONLY THROUGH MID TO LATE AFTERNOON. WATCH UNLIKELY AT THIS TIME ALTHOUGH SITUATION WILL CONTINUE TO BE MONITORED. ..BOTHWELL.. 04/07/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT... ATTN...WFO...DTX...APX...GRR... 43198477 43948521 44648536 45218531 45578506 45788445 45548382 45298346 45048338 44408316 44078313 43658307 43318320 43098355 43088406 43128441
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 11:06 AM EDT | Mesoscale Discussion | SPC | Alcona, Alpena, Antrim, Arenac, Bay, Cheboygan and 15 more | 84 min |
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.