Alert archive / Michigan / Mesoscale Discussions in 2003

Mesoscale Discussion 1910

July 20, 20039 counties in Michigan; 8 counties in Minnesota; 6 counties in Wisconsin

The Storm Prediction Center issued this mesoscale discussion at Jul 20, 2003, 2:16 PM EDT for 9 counties in Michigan; 8 counties in Minnesota; 6 counties in Wisconsin. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued
Jul 20, 2003, 2:16 PM EDT (18:16 UTC)
Expired
Jul 20, 2003, 4:15 PM EDT
In force
119 min
Issued by
the Storm Prediction Center
All 23 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, Ontonagon County, MI, Beltrami County, MN, Cook County, MN, Itasca County, MN, Koochiching County, MN, Lake County, MN, Lake of the Woods County, MN, Roseau County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Douglas County, WI, Florence County, WI, Iron County, WI, Vilas County, WI

The watches that followed

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

The nearest sounding before it

International Fa, MN (KINL), launched 12:00Z, 6.3 hours before the alert went out and 169 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, International Fa, MN at 12:00Z on 2003-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, International Fa, MN at 12:00Z on 2003-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 25 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2255 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
25 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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 20, 1:41 PM EDTMesoscale DiscussionSPCBarry, Branch, Calhoun, Eaton, Hillsdale, Ingham and 6 more64 min
Jul 20, 2:20 PM EDTSevere Thunderstorm WatchSPCAlcona, Alpena, Arenac, Bay, Clare, Clinton and 28 more6 hr
Jul 20, 2:55 PM EDTSevere Thunderstorm WatchSPCAlger, Baraga, Delta, Dickinson, Gogebic, Houghton and 4 more7 hr
Jul 20, 4:27 PM EDTMesoscale DiscussionSPCAlger, Baraga, Delta, Dickinson, Gogebic, Houghton and 4 more63 min
Jul 20, 4:37 PM EDTMesoscale DiscussionSPCAlcona, Alpena, Arenac, Bay, Crawford, Genesee and 21 more113 min
Jul 20, 7:23 PM EDTMesoscale DiscussionSPCBerrien, Cass, Saint Joseph, Van Buren97 min
Jul 20, 7:45 PM EDTSevere Thunderstorm WatchSPCAllegan, Antrim, Barry, Benzie, Berrien, Branch and 27 more5 hr
Jul 20, 7:47 PM EDTMesoscale DiscussionSPCBaraga, Delta, Dickinson, Gogebic, Houghton, Iron and 3 more88 min
Jul 19, 8:16 PM EDTMesoscale DiscussionSPCBeltrami, Clearwater, Itasca, Kittson, Koochiching, Marshall and 5 more89 min
Jul 20, 12:00 AM EDTSevere Thunderstorm WatchSPCBecker, Beltrami, Clay, Clearwater, Hubbard, Mahnomen and 7 more5 hr
Jul 20, 2:15 AM EDTSevere Thunderstorm WatchSPCBig Stone, Chippewa, Cottonwood, Douglas, Grant, Jackson and 15 more6 hr
Jul 20, 3:03 AM EDTMesoscale DiscussionSPCBig Stone, Chippewa, Grant, Lac qui Parle, Lincoln, Lyon and 6 more117 min
Jul 20, 4:05 AM EDTSevere Thunderstorm WatchSPCBecker, Clay, Grant, Norman, Otter Tail, Wilkin4 hr
Jul 20, 5:14 AM EDTMesoscale DiscussionSPCBlue Earth, Brown, Carver, Chippewa, Cottonwood, Dakota and 34 more3 hr
Jul 20, 7:45 AM EDTSevere Thunderstorm WatchSPCBlue Earth, Brown, Cottonwood, Faribault, Freeborn, Jackson and 15 more5 hr
Jul 20, 11:07 AM EDTMesoscale DiscussionSPCCottonwood, Jackson, Lincoln, Lyon, Murray, Nobles and 3 more53 min
Jul 20, 6:14 PM EDTMesoscale DiscussionSPCLincoln, Lyon, Murray, Pipestone, Rock, Yellow Medicine2 hr
Jul 20, 5:25 PM EDTSevere Thunderstorm WatchSPCBrown, Calumet, Columbia, Dane, Dodge, Fond du Lac and 19 more5 hr

Nearby

Mesoscale Discussions in Michigan, 2003Mesoscale Discussions in Minnesota, 2003Mesoscale Discussions in Wisconsin, 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.