Alert archive / Wisconsin / Mesoscale Discussions in 2003

Mesoscale Discussion 1675

July 7, 2003Dickinson County, Iron County, Michigan; 27 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2003, 12:54 PM CDT for Dickinson County, Iron County, Michigan; 27 counties in Wisconsin. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued
Jul 7, 2003, 12:54 PM CDT (17:54 UTC)
Expired
Jul 7, 2003, 2:00 PM CDT
In force
66 min
Issued by
the Storm Prediction Center
All 29 counties

Dickinson County, MI, Iron County, MI, Adams County, WI, Brown County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Florence County, WI, Fond du Lac County, WI, Forest County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Langlade County, WI, Marinette County, WI, Marquette County, WI, Menominee County, WI, Oconto County, WI, Outagamie County, WI, Portage County, WI, Sauk County, WI, Shawano County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waupaca County, WI, Waushara County, WI, Winnebago County, WI

The radar

The Green Bay radar (KGRB), 60 km from the middle of the area, began a volume at 17:58 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

Davenport, (KDVN), launched 12:00Z, 5.9 hours before the alert went out and 356 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, Davenport, at 12:00Z on 2003-07-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 611 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, Davenport, at 12:00Z on 2003-07-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 113 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
611 J/kg
Mixed-layer CIN
-254 J/kg
Mixed-layer LCL
1669 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
113 m²/s²
0-3 km storm-relative helicity
148 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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
Jul 6, 8:46 PM CDTMesoscale DiscussionSPCAllegan, Barry, Bay, Berrien, Branch, Calhoun and 32 more59 min
Jul 7, 8:30 AM CDTMesoscale DiscussionSPCAllegan, Berrien, Branch, Calhoun, Cass, Hillsdale and 4 more60 min
Jul 7, 8:45 AM CDTSevere Thunderstorm WatchSPCAllegan, Barry, Berrien, Branch, Calhoun, Cass and 13 more4 hr
Jul 7, 10:14 AM CDTMesoscale DiscussionSPCBarry, Branch, Calhoun, Cass, Eaton, Hillsdale and 10 more61 min
Jul 7, 12:14 PM CDTMesoscale DiscussionSPCBranch, Calhoun, Eaton, Hillsdale, Ingham, Jackson and 6 more61 min
Jul 7, 2:35 PM CDTMesoscale DiscussionSPCDelta, Dickinson, Marquette, Menominee115 min
Jul 7, 4:42 PM CDTMesoscale DiscussionSPCChippewa, Luce, Mackinac, Schoolcraft3 hr
Jul 7, 5:30 PM CDTTornado WatchSPCBerrien6 hr
Jul 6, 8:05 PM CDTTornado WatchSPCDouglas6 hr
Jul 6, 10:31 PM CDTMesoscale DiscussionSPCDouglas119 min
Jul 7, 1:25 AM CDTMesoscale DiscussionSPCAdams, Buffalo, Chippewa, Clark, Columbia, Crawford and 21 more95 min
Jul 7, 2:40 AM CDTSevere Thunderstorm WatchSPCBuffalo, Crawford, Grant, La Crosse, Trempealeau, Vernon4 hr
Jul 7, 2:56 AM CDTMesoscale DiscussionSPCBarron, Burnett, Chippewa, Douglas, Dunn, Eau Claire and 9 more2 hr
Jul 7, 4:22 AM CDTMesoscale DiscussionSPCAdams, Columbia, Crawford, Dane, Grant, Green and 9 more83 min

Nearby

Mesoscale Discussions in Wisconsin, 2003Mesoscale Discussions in Michigan, 2003Every mesoscale discussion in 2003

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.