Alert archive / Iowa / Severe Thunderstorm Watches in 2001
Severe Thunderstorm Watch 440
The Storm Prediction Center issued this severe thunderstorm watch at Jun 18, 2001, 1:30 AM CDT for 4 states. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 18, 2001, 1:30 AM CDT (06:30 UTC)
- Expired
- Jun 18, 2001, 7:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
All 77 counties
Allamakee County, IA, Benton 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, Clinton County, IA, Delaware County, IA, Dubuque County, IA, Fayette County, IA, Floyd County, IA, Franklin County, IA, Grundy County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Howard County, IA, Jackson County, IA, Jones County, IA, Linn County, IA, Mitchell County, IA, Tama County, IA, Winnebago County, IA, Winneshiek County, IA, Worth County, IA, Wright County, IA, Boone County, IL, Carroll County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Jo Daviess County, IL, Kane County, IL, Kendall County, IL, Lake County, IL, Lee County, IL, McHenry County, IL, Ogle County, IL, Stephenson County, IL, Whiteside County, IL, Will County, IL, Winnebago County, IL, Blue Earth County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Houston County, MN, Le Sueur County, MN, Mower County, MN, Olmsted County, MN, Steele County, MN, Waseca County, MN, Winona County, MN, Columbia County, WI, Crawford County, WI, Dane County, WI, Dodge County, WI, Grant County, WI, Green County, WI, Iowa County, WI, Jefferson County, WI, Kenosha County, WI, La Crosse County, WI, Lafayette County, WI, Milwaukee County, WI, Racine County, WI, Richland County, WI, Rock County, WI, Sauk County, WI, Vernon County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI
The radar
The La Crosse radar (KARX), 77 km from the middle of the area, began a volume at 06:30 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Warnings issued inside it
4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 1:35 AM CDT | Severe Thunderstorm Warning | ARX | Richland | 55 min |
| Jun 18, 2:01 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Waukesha | 59 min |
| Jun 18, 4:35 AM CDT | Severe Thunderstorm Warning | ARX | Grant | 55 min |
| Jun 18, 6:03 AM CDT | Severe Thunderstorm Warning | ARX | La Crosse | 57 min |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 6.5 hours before the alert went out and 193 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.
- Mixed-layer CAPE
- 1681 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1616 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 133 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 18, 5:30 PM CDT | Severe Thunderstorm Watch | SPC | Crawford, Harrison, Monona | 6 hr |
| Jun 18, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 11 more | 5 hr |
| Jun 18, 5:15 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Benton, Big Stone, Blue Earth, Brown, Carver and 36 more | 6 hr |
| Jun 18, 3:00 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Becker, Benton, Big Stone, Carlton, Cass and 17 more | 6 hr |
| Jun 18, 7:30 AM CDT | Severe Thunderstorm Watch | SPC | Brown, Calumet, Door, Florence, Forest, Kewaunee and 15 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Iowa, 2001Severe Thunderstorm Watches in Wisconsin, 2001Severe Thunderstorm Watches in Illinois, 2001Every severe thunderstorm watch in 2001
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; radar from the NEXRAD Level II archive.