Alert archive / Michigan / Mesoscale Discussions in 2007

Mesoscale Discussion 971

June 2, 20076 counties in Michigan

The Storm Prediction Center issued this mesoscale discussion at Jun 2, 2007, 9:23 PM EDT for 6 counties in Michigan. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Jun 2, 2007, 9:23 PM EDT (01:23 UTC)
Expired
Jun 2, 2007, 10:30 PM EDT
In force
67 min
Issued by
the Storm Prediction Center

Counties Alpena County, MI, Cheboygan County, MI, Montmorency County, MI, Oscoda County, MI, Otsego County, MI, Presque Isle County, MI

The radar

The NCL Michigan radar (KAPX), 62 km from the middle of the area, began a volume at 01:25 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

Alpena, MI (KAPX), launched 00:00Z, 1.4 hours before the alert went out and 121 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.

Skew-T log-pSkew-T log-p diagram, Alpena, MI at 00:00Z on 2007-06-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 291 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Alpena, MI at 00:00Z on 2007-06-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 26 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
291 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
1814 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
26 m²/s²
0-3 km storm-relative helicity
59 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
ACUS11 KWNS 030123
SWOMCD
SPC MCD 030123 
MIZ000-030230-

MESOSCALE DISCUSSION 0971
NWS STORM PREDICTION CENTER NORMAN OK
0823 PM CDT SAT JUN 02 2007

AREAS AFFECTED...NRN LOWER MI

CONCERNING...SEVERE THUNDERSTORM WATCH 333...

VALID 030123Z - 030230Z

THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 333
CONTINUES.

AIRMASS HAS STABILIZED SIGNIFICANTLY ACROSS LOWER MI THIS
EVENING...PRIMARILY DUE TO EXTENSIVE CONVECTION AND THE LOSS OF
DAYTIME HEATING.  STRONGEST ACTIVITY IS CURRENTLY LOCATED ACROSS NRN
LOWER MI NEAR THE LAKE HURON SHORELINE...LIKELY ENHANCED BY LAKE
BREEZE.  WITH TEMPERATURES CONTINUING TO COOL IT APPEARS
THUNDERSTORMS WILL ALSO DECREASE IN INTENSITY/COVERAGE.

..DARROW.. 06/03/2007

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...APX...

44328372 44688453 45818482 45738372 44928308

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 3, 1:23 PM EDTMesoscale DiscussionSPCDickinson, Menominee97 min
Jun 3, 2:45 PM EDTMesoscale DiscussionSPCGenesee, Hillsdale, Ingham, Jackson, Lenawee, Livingston and 5 more90 min

Nearby

Mesoscale Discussions in Michigan, 2007Every mesoscale discussion in 2007

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.