Alert archive / Iowa / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 439

June 19, 200220 counties in Iowa; 8 counties in Minnesota; 8 counties in Wisconsin

The Storm Prediction Center issued this severe thunderstorm watch at Jun 19, 2002, 5:15 AM CDT for 20 counties in Iowa; 8 counties in Minnesota; 8 counties in Wisconsin. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jun 19, 2002, 5:15 AM CDT (10:15 UTC)
Expired
Jun 19, 2002, 10:00 AM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 36 counties

Allamakee County, IA, Black Hawk County, IA, Bremer County, IA, Buchanan County, IA, Butler County, IA, Cerro Gordo County, IA, Chickasaw County, IA, Clayton County, IA, Delaware County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hardin County, IA, Howard County, IA, Mitchell County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Dodge County, MN, Fillmore County, MN, Goodhue County, MN, Houston County, MN, Mower County, MN, Olmsted County, MN, Wabasha County, MN, Winona County, MN, Buffalo County, WI, Crawford County, WI, Jackson County, WI, La Crosse County, WI, Monroe County, WI, Trempealeau County, WI, Vernon County, WI, Wood County, WI

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jun 19, 6:52 AM CDTFlash Flood WarningDMXButler15 hr
Jun 19, 6:52 AM CDTFlash Flood WarningDMXButler3 hr
Jun 19, 7:39 AM CDTFlash Flood WarningDMXFranklin4 hr
Jun 19, 7:39 AM CDTFlash Flood WarningDMXFranklin16 hr
Jun 19, 9:43 AM CDTFlash Flood WarningDMXButler6 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 10.3 hours before the alert went out and 230 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 00:00Z on 2002-06-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 377 joules per kilogram.LCLEL10008507005003002001001 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 00:00Z on 2002-06-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
377 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
1697 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
110 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 6:30 PM CDTSevere Thunderstorm WatchSPCLyon, Osceola, Plymouth, Sioux5 hr
Jun 19, 5:45 AM CDTSevere Thunderstorm WatchSPCBig Stone, Douglas, Grant, Kandiyohi, Otter Tail, Pope and 6 more4 hr
Jun 19, 3:00 PM CDTTornado WatchSPCBecker, Big Stone, Cass, Chippewa, Clay, Clearwater and 15 more5 hr
Jun 19, 5:30 PM CDTSevere Thunderstorm WatchSPCBeltrami, Koochiching, Pennington, Red Lake, Roseau, Saint Louis5 hr

Nearby

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