Alert archive / Minnesota / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 516

July 21, 2002Gogebic County, Iron County, Michigan; 26 counties in Minnesota; 26 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jul 21, 2002, 2:55 PM CDT for Gogebic County, Iron County, Michigan; 26 counties in Minnesota; 26 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Jul 21, 2002, 2:55 PM CDT (19:55 UTC)
Expired
Jul 21, 2002, 9:00 PM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 54 counties

Gogebic County, MI, Iron County, MI, Anoka County, MN, Blue Earth County, MN, Carver County, MN, Chisago County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Hennepin County, MN, Houston County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Nicollet County, MN, Olmsted County, MN, Ramsey County, MN, Rice County, MN, Scott County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Ashland County, WI, Barron County, WI, Buffalo County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Douglas County, WI, Dunn County, WI, Eau Claire County, WI, Iron County, WI, Jackson County, WI, La Crosse County, WI, Lincoln County, WI, Marathon County, WI, Oneida County, WI, Pepin County, WI, Pierce County, WI, Polk County, WI, Price County, WI, Rusk County, WI, Saint Croix County, WI, Sawyer County, WI, Taylor County, WI, Trempealeau County, WI, Vilas County, WI, Washburn County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 21, 2:58 PM CDTSevere Thunderstorm WarningDLHAshland, Iron, Price, Sawyer62 min
Jul 21, 3:06 PM CDTSevere Thunderstorm WarningMPXRusk54 min
Jul 21, 3:27 PM CDTSevere Thunderstorm WarningGRBOneida, Vilas78 min
Jul 21, 3:28 PM CDTSevere Thunderstorm WarningMQTGogebic, Houghton, Iron, Ontonagon62 min
Jul 21, 3:53 PM CDTSevere Thunderstorm WarningDLHIron, Price52 min
Jul 21, 4:42 PM CDTSevere Thunderstorm WarningMPXDunn33 min
Jul 21, 4:45 PM CDTSevere Thunderstorm WarningGRBOneida75 min
Jul 21, 4:46 PM CDTSevere Thunderstorm WarningMPXRusk44 min
Jul 21, 5:00 PM CDTSevere Thunderstorm WarningMPXFreeborn45 min
Jul 21, 5:25 PM CDTSevere Thunderstorm WarningARXClark, Taylor65 min
Jul 21, 5:32 PM CDTSevere Thunderstorm WarningMPXMartin43 min
Jul 21, 5:35 PM CDTSevere Thunderstorm WarningARXOlmsted55 min
Jul 21, 5:46 PM CDTSevere Thunderstorm WarningGRBLincoln, Marathon74 min
Jul 21, 5:48 PM CDTFlash Flood WarningMPXFreeborn3 hr
Jul 21, 5:59 PM CDTSevere Thunderstorm WarningGRBLincoln, Marathon61 min
Jul 21, 6:00 PM CDTFlash Flood WarningMPXFaribault, Martin3 hr
Jul 21, 6:07 PM CDTSevere Thunderstorm WarningGRBLincoln, Marathon53 min
Jul 21, 6:20 PM CDTSevere Thunderstorm WarningMPXFaribault, Martin40 min
Jul 21, 6:30 PM CDTSevere Thunderstorm WarningARXClark45 min
Jul 21, 6:40 PM CDTFlash Flood WarningARXDodge, Mower4 hr
Jul 21, 6:40 PM CDTSevere Thunderstorm WarningGRBMarathon, Portage, Wood65 min
Jul 21, 7:00 PM CDTSevere Thunderstorm WarningMPXFreeborn45 min
Jul 21, 7:29 PM CDTSevere Thunderstorm WarningARXJackson, Monroe61 min
Jul 21, 7:39 PM CDTFlash Flood WarningMPXSteele81 min

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.9 hours before the alert went out and 102 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, Minneapolis, MN at 12:00Z on 2002-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2410 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, Minneapolis, MN at 12:00Z on 2002-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
2410 J/kg
Mixed-layer CIN
-202 J/kg
Mixed-layer LCL
1319 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 21, 4:25 PM CDTSevere Thunderstorm WatchSPCDelta, Dickinson, Luce, Menominee, Schoolcraft6 hr
Jul 21, 6:25 PM CDTSevere Thunderstorm WatchSPCAlpena, Antrim, Benzie, Charlevoix, Cheboygan, Chippewa and 15 more5 hr
Jul 21, 3:40 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Cottonwood, Dodge, Faribault, Freeborn, Jackson and 6 more5 hr

Nearby

Severe Thunderstorm Watches in Minnesota, 2002Severe Thunderstorm Watches in Wisconsin, 2002Severe Thunderstorm Watches in Michigan, 2002Every severe thunderstorm watch in 2002

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.