Alert archive / Wisconsin / Mesoscale Discussions in 2006

Mesoscale Discussion 1276

June 21, 200610 counties in Michigan; 20 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jun 21, 2006, 2:06 PM EDT for 10 counties in Michigan; 20 counties in Wisconsin. It was in force for 84 min.

The area

The outline as issued.

The facts

Issued
Jun 21, 2006, 2:06 PM EDT (18:06 UTC)
Expired
Jun 21, 2006, 3:30 PM EDT
In force
84 min
Issued by
the Storm Prediction Center
All 30 counties

Alger County, MI, Baraga County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Keweenaw County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Ashland County, WI, Chippewa County, WI, Clark County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Marinette County, WI, Menominee County, WI, Oconto County, WI, Oneida County, WI, Price County, WI, Rusk County, WI, Sawyer County, WI, Shawano County, WI, Taylor County, WI, Vilas County, WI

The radar

The Marquette radar (KMQT), 142 km from the middle of the area, began a volume at 18:04 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.1 hours before the alert went out and 195 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, Green Bay/Straub, WI at 12:00Z on 2006-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 556 joules per kilogram.LCLLFCEL10008507005003002001001 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, Green Bay/Straub, WI at 12:00Z on 2006-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 64 square meters per square second.19395878Sfc1 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
556 J/kg
Mixed-layer CIN
-137 J/kg
Mixed-layer LCL
630 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
64 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 21, 2:28 PM EDTSevere Thunderstorm WatchSPCAlger, Baraga, Delta, Dickinson, Gogebic, Houghton and 5 more7 hr
Jun 21, 3:28 PM EDTMesoscale DiscussionSPCBerrien, Branch, Cass, Hillsdale, Lenawee, Saint Joseph92 min
Jun 21, 4:06 PM EDTTornado WatchSPCAllegan, Barry, Berrien, Branch, Calhoun, Cass and 7 more7 hr
Jun 21, 4:19 PM EDTMesoscale DiscussionSPCAlcona, Alpena, Antrim, Arenac, Bay, Benzie and 21 more86 min
Jun 21, 5:25 PM EDTMesoscale DiscussionSPCLenawee, Livingston, Monroe, Washtenaw, Wayne35 min
Jun 21, 5:38 PM EDTMesoscale DiscussionSPCAlcona, Alger, Alpena, Antrim, Baraga, Benzie and 21 more97 min
Jun 21, 5:43 PM EDTTornado WatchSPCLenawee, Livingston, Macomb, Monroe, Oakland, Saint Clair and 2 more6 hr
Jun 21, 7:27 AM EDTMesoscale DiscussionSPCColumbia, Crawford, Dane, Dodge, Grant, Green and 12 more2 hr
Jun 21, 11:32 AM EDTMesoscale DiscussionSPCColumbia, Crawford, Dane, Dodge, Grant, Green and 10 more118 min
Jun 21, 11:56 AM EDTSevere Thunderstorm WatchSPCAdams, Calumet, Columbia, Crawford, Dane, Dodge and 26 more7 hr
Jun 21, 12:22 PM EDTMesoscale DiscussionSPCAshland, Bayfield, Douglas, Sawyer, Washburn83 min
Jun 21, 6:24 PM EDTMesoscale DiscussionSPCDane, Green, Jefferson, Kenosha, Milwaukee, Racine and 3 more36 min

Nearby

Mesoscale Discussions in Wisconsin, 2006Mesoscale Discussions in Michigan, 2006Every mesoscale discussion in 2006

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.