Alert archive / Minnesota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 79
The Storm Prediction Center issued this severe thunderstorm watch at Apr 17, 2004, 11:35 PM CDT for 6 counties in Iowa; 22 counties in Minnesota; 18 counties in South Dakota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2004, 11:35 PM CDT (04:35 UTC)
- Expired
- Apr 18, 2004, 5:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 46 counties
Clay County, IA, Dickinson County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Sioux County, IA, Big Stone County, MN, Brown County, MN, Chippewa County, MN, Cottonwood County, MN, Jackson County, MN, Kandiyohi County, MN, Lac qui Parle County, MN, Lincoln County, MN, Lyon County, MN, Meeker County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Pope County, MN, Redwood County, MN, Renville County, MN, Rock County, MN, Stearns County, MN, Stevens County, MN, Swift County, MN, Traverse County, MN, Yellow Medicine County, MN, Bon Homme County, SD, Brookings County, SD, Codington County, SD, Deuel County, SD, Grant County, SD, Hamlin County, SD, Hanson County, SD, Hutchinson County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Roberts County, SD, Turner County, SD, Yankton County, SD
The radar
The Sioux Falls radar (KFSD), 55 km from the middle of the area, began a volume at 04:36 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
12 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 11:43 PM CDT | Severe Thunderstorm Warning | FSD | Lake, Moody | 32 min |
| Apr 18, 12:00 AM CDT | Severe Thunderstorm Warning | FSD | Minnehaha | 15 min |
| Apr 18, 12:08 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 37 min |
| Apr 18, 12:15 AM CDT | Severe Thunderstorm Warning | FSD | Lake, Moody | 45 min |
| Apr 18, 12:33 AM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle, Yellow Medicine | 42 min |
| Apr 18, 12:44 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln | 31 min |
| Apr 18, 12:55 AM CDT | Severe Thunderstorm Warning | FSD | Pipestone | 20 min |
| Apr 18, 1:10 AM CDT | Severe Thunderstorm Warning | MPX | Yellow Medicine | 35 min |
| Apr 18, 1:15 AM CDT | Severe Thunderstorm Warning | FSD | Lincoln, Lyon | 45 min |
| Apr 18, 1:26 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa | 49 min |
| Apr 18, 1:50 AM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi | 40 min |
| Apr 18, 2:41 AM CDT | Severe Thunderstorm Warning | ABR | Day, Grant, Roberts | 34 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
Aberdeen, SD (KABR), launched 00:00Z, 4.6 hours before the alert went out and 173 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2004 m above ground
- 0-6 km bulk shear
- 72 kt
- 0-1 km storm-relative helicity
- 158 m²/s²
- 0-3 km storm-relative helicity
- 549 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 7:45 PM CDT | Severe Thunderstorm Watch | SPC | Allamakee, Cerro Gordo, Chickasaw, Emmet, Floyd, Hancock and 7 more | 5 hr |
| Apr 17, 9:31 PM CDT | Mesoscale Discussion | SPC | Allamakee, Cerro Gordo, Chickasaw, Emmet, Fayette, Floyd and 8 more | 119 min |
| Apr 17, 10:05 PM CDT | Tornado Watch | SPC | Allamakee, Black Hawk, Bremer, Buchanan, Butler, Cerro Gordo and 19 more | 5 hr |
| Apr 17, 11:10 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Lyon, O'Brien and 3 more | 95 min |
| Apr 17, 11:50 PM CDT | Mesoscale Discussion | SPC | Cerro Gordo, Emmet, Hancock, Howard, Humboldt, Kossuth and 5 more | 85 min |
| Apr 18, 4:15 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cerro Gordo, Cherokee, Clay, Dickinson and 20 more | 60 min |
| Apr 18, 4:40 PM CDT | Tornado Watch | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cass, Cherokee and 29 more | 5 hr |
| Apr 18, 12:30 AM CDT | Severe Thunderstorm Watch | SPC | Anoka, Carver, Chisago, Dakota, Goodhue, Hennepin and 11 more | 5 hr |
| Apr 18, 2:37 AM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Big Stone, Brown, Carlton and 40 more | 53 min |
| Apr 18, 4:43 AM CDT | Mesoscale Discussion | SPC | Aitkin, Benton, Carlton, Cass, Chisago, Crow Wing and 15 more | 32 min |
| Apr 18, 8:04 AM CDT | Mesoscale Discussion | SPC | Aitkin, Benton, Carlton, Cass, Crow Wing, Douglas and 6 more | 86 min |
| Apr 18, 12:39 PM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Big Stone, Carlton, Carver and 32 more | 2 hr |
| Apr 18, 1:40 PM CDT | Tornado Watch | SPC | Aitkin, Anoka, Benton, Carlton, Carver, Chippewa and 32 more | 6 hr |
| Apr 18, 2:20 PM CDT | Severe Thunderstorm Watch | SPC | Lincoln, Lyon, Pipestone, Rock | 6 hr |
| Apr 18, 3:33 PM CDT | Mesoscale Discussion | SPC | Aitkin, Anoka, Benton, Carlton, Chisago, Crow Wing and 12 more | 117 min |
| Apr 18, 5:23 PM CDT | Mesoscale Discussion | SPC | Lincoln, Lyon, Pipestone, Rock | 2 hr |
| Apr 18, 6:35 PM CDT | Tornado Watch | SPC | Brown, Carver, Dakota, Goodhue, Hennepin, Le Sueur and 7 more | 5 hr |
| Apr 18, 1:42 PM CDT | Mesoscale Discussion | SPC | Aurora, Beadle, Bennett, Brule, Buffalo, Charles Mix and 20 more | 3 hr |
Nearby
Severe Thunderstorm Watches in Minnesota, 2004Severe Thunderstorm Watches in South Dakota, 2004Severe Thunderstorm Watches in Iowa, 2004Every severe thunderstorm watch in 2004
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.