Alert archive / Michigan / Mesoscale Discussions in 2005

Mesoscale Discussion 1909

July 31, 200522 counties in Michigan; 9 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 31, 2005, 10:43 PM EDT for 22 counties in Michigan; 9 counties in Wisconsin. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jul 31, 2005, 10:43 PM EDT (02:43 UTC)
Expired
Aug 1, 2005, 12:15 AM EDT
In force
92 min
Issued by
the Storm Prediction Center
All 31 counties

Alger County, MI, Antrim County, MI, Baraga County, MI, Charlevoix County, MI, Cheboygan County, MI, Chippewa County, MI, Delta County, MI, Dickinson County, MI, Emmet County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Leelanau County, MI, Luce County, MI, Mackinac County, MI, Marquette County, MI, Menominee County, MI, Montmorency County, MI, Ontonagon County, MI, Otsego County, MI, Presque Isle County, MI, Schoolcraft County, MI, Ashland County, WI, Bayfield County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Oneida County, WI, Sawyer County, WI, Vilas County, WI

The radar

The Marquette radar (KMQT), 60 km from the middle of the area, began a volume at 02:45 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, 2.7 hours before the alert went out and 452 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 2005-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2416 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 2005-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 60 square meters per square second.1939Sfc1 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
2416 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
998 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
60 m²/s²
0-3 km storm-relative helicity
139 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.0

Open this sounding in Storm Lab

The text

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

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Nearby

Mesoscale Discussions in Michigan, 2005Mesoscale Discussions in Wisconsin, 2005Every mesoscale discussion in 2005

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.