Alert archive / Wisconsin / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 665

September 1, 2002Iron County, Michigan; Pine County, Washington County, Minnesota; 25 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Sep 1, 2002, 6:15 PM CDT for Iron County, Michigan; Pine County, Washington County, Minnesota; 25 counties in Wisconsin. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Sep 1, 2002, 6:15 PM CDT (23:15 UTC)
Expired
Sep 2, 2002, 12:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
All 28 counties

Iron County, MI, Pine County, MN, Washington County, MN, Barron County, WI, Burnett County, WI, Chippewa County, WI, Clark County, WI, Dunn County, WI, Eau Claire County, WI, Florence County, WI, Forest County, WI, Iron County, WI, Langlade County, WI, Lincoln County, WI, Marathon County, WI, Menominee 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, Shawano County, WI, Taylor County, WI, Vilas County, WI, Washburn County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Sep 1, 7:40 PM CDTFlash Flood WarningDLHPine4 hr
Sep 1, 11:40 PM CDTSevere Thunderstorm WarningMPXDunn, Pepin, Pierce, Saint Croix50 min
Sep 1, 11:43 PM CDTSevere Thunderstorm WarningMPXChippewa, Eau Claire47 min

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 11.3 hours before the alert went out and 218 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 2002-09-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 319 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 2002-09-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 208 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
319 J/kg
Mixed-layer CIN
-200 J/kg
Mixed-layer LCL
1215 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
208 m²/s²
0-3 km storm-relative helicity
219 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
Aug 31, 7:00 PM CDTSevere Thunderstorm WatchSPCKittson, Marshall, Pennington, Polk, Red Lake, Roseau5 hr
Aug 31, 9:55 PM CDTSevere Thunderstorm WatchSPCClay, Clearwater, Kittson, Lake of the Woods, Mahnomen, Marshall and 6 more6 hr
Sep 1, 12:45 PM CDTSevere Thunderstorm WatchSPCAnoka, Benton, Carver, Chisago, Dakota, Hennepin and 17 more6 hr
Sep 1, 3:45 PM CDTSevere Thunderstorm WatchSPCChippewa, Cottonwood, Jackson, Kandiyohi, Lac qui Parle, Lincoln and 9 more5 hr
Sep 1, 5:20 PM CDTSevere Thunderstorm WatchSPCBlue Earth, Brown, Dodge, Faribault, Fillmore, Freeborn and 11 more6 hr

Nearby

Severe Thunderstorm Watches in Wisconsin, 2002Severe Thunderstorm Watches in Minnesota, 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.