Alert archive / Wisconsin / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 772

July 20, 200310 counties in Michigan; Carlton County, Lake County, Saint Louis County, Minnesota; 14 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jul 20, 2003, 2:55 PM EDT for 10 counties in Michigan; Carlton County, Lake County, Saint Louis County, Minnesota; 14 counties in Wisconsin. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Jul 20, 2003, 2:55 PM EDT (18:55 UTC)
Expired
Jul 20, 2003, 10:00 PM EDT
In force
7 hr
Issued by
the Storm Prediction Center
All 27 counties

Alger County, MI, Baraga County, MI, Delta County, MI, Dickinson County, MI, Gogebic County, MI, Houghton County, MI, Iron County, MI, Marquette County, MI, Menominee County, MI, Ontonagon County, MI, Carlton County, MN, Lake County, MN, Saint Louis County, MN, Ashland County, WI, Bayfield County, WI, Door County, WI, Douglas County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Marinette County, WI, Oconto County, WI, Oneida County, WI, Price County, WI, Sawyer County, WI, Vilas County, WI

Warnings issued inside it

24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 20, 3:26 PM EDTSevere Thunderstorm WarningMQTDelta49 min
Jul 20, 5:26 PM EDTSevere Thunderstorm WarningDLHBayfield64 min
Jul 20, 5:35 PM EDTSevere Thunderstorm WarningDLHBayfield55 min
Jul 20, 6:07 PM EDTSevere Thunderstorm WarningGRBFlorence, Forest38 min
Jul 20, 6:30 PM EDTSevere Thunderstorm WarningMQTGogebic60 min
Jul 20, 6:46 PM EDTSevere Thunderstorm WarningMQTOntonagon74 min
Jul 20, 6:46 PM EDTSevere Thunderstorm WarningGRBForest, Marinette59 min
Jul 20, 6:56 PM EDTSevere Thunderstorm WarningDLHAshland, Price49 min
Jul 20, 7:01 PM EDTSevere Thunderstorm WarningGRBDoor29 min
Jul 20, 7:04 PM EDTSevere Thunderstorm WarningMQTDickinson56 min
Jul 20, 7:15 PM EDTSevere Thunderstorm WarningMQTMarquette, Menominee60 min
Jul 20, 7:26 PM EDTSevere Thunderstorm WarningMQTIron34 min
Jul 20, 7:28 PM EDTSevere Thunderstorm WarningGRBVilas47 min
Jul 20, 7:54 PM EDTSevere Thunderstorm WarningMQTHoughton51 min
Jul 20, 8:00 PM EDTSevere Thunderstorm WarningMQTDickinson60 min
Jul 20, 8:03 PM EDTSevere Thunderstorm WarningMQTOntonagon27 min
Jul 20, 8:14 PM EDTSevere Thunderstorm WarningMQTMenominee61 min
Jul 20, 8:16 PM EDTSevere Thunderstorm WarningDLHAshland, Iron59 min
Jul 20, 8:28 PM EDTSevere Thunderstorm WarningGRBForest, Oneida47 min
Jul 20, 8:46 PM EDTSevere Thunderstorm WarningMQTIron59 min
Jul 20, 8:57 PM EDTSevere Thunderstorm WarningMQTDelta48 min
Jul 20, 9:22 PM EDTSevere Thunderstorm WarningDLHAshland, Sawyer53 min
Jul 20, 9:33 PM EDTSevere Thunderstorm WarningMQTGogebic, Ontonagon42 min
Jul 20, 9:37 PM EDTSevere Thunderstorm WarningMQTBaraga, Houghton38 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Green Bay/Straub, WI (KGRB), launched 12:00Z, 6.9 hours before the alert went out and 295 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 2003-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 765 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 2003-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 51 square meters per square second.1939587897Sfc1 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
765 J/kg
Mixed-layer CIN
-74 J/kg
Mixed-layer LCL
716 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
51 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.5

Open this sounding in Storm Lab

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, 2:16 PM EDTMesoscale DiscussionSPCAlger, Baraga, Dickinson, Gogebic, Houghton, Iron and 3 more119 min
Jul 20, 2:20 PM EDTSevere Thunderstorm WatchSPCAlcona, Alpena, Arenac, Bay, Clare, Clinton and 28 more6 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

Severe Thunderstorm Watches in Wisconsin, 2003Severe Thunderstorm Watches in Michigan, 2003Severe Thunderstorm Watches in Minnesota, 2003Every severe thunderstorm watch 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.