Alert archive / Minnesota / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 677
The Storm Prediction Center issued this severe thunderstorm watch at Jul 31, 2004, 9:45 PM CDT for 5 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2004, 9:45 PM CDT (02:45 UTC)
- Expired
- Aug 1, 2004, 3:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 57 counties
Buena Vista County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Hancock County, IA, Kossuth County, IA, Lyon County, IA, Mitchell County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Sioux County, IA, Winnebago County, IA, Worth County, IA, Blue Earth County, MN, Brown County, MN, Cottonwood County, MN, Dakota County, MN, Dodge County, MN, Faribault County, MN, Fillmore County, MN, Freeborn County, MN, Goodhue County, MN, Jackson County, MN, Le Sueur County, MN, Martin County, MN, Mower County, MN, Murray County, MN, Nicollet County, MN, Nobles County, MN, Olmsted County, MN, Pipestone County, MN, Rice County, MN, Rock County, MN, Scott County, MN, Sibley County, MN, Steele County, MN, Wabasha County, MN, Waseca County, MN, Washington County, MN, Watonwan County, MN, Winona County, MN, Dakota County, NE, Lincoln County, SD, Union County, SD, Buffalo County, WI, Chippewa County, WI, Dunn County, WI, Eau Claire County, WI, La Crosse County, WI, Pepin County, WI, Pierce County, WI, Rusk County, WI, Saint Croix County, WI, Trempealeau County, WI
The radar
The Minneapolis radar (KMPX), 126 km from the middle of the area, began a volume at 02:46 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
19 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 9:48 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Osceola | 27 min |
| Jul 31, 9:49 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 41 min |
| Jul 31, 10:08 PM CDT | Severe Thunderstorm Warning | FSD | Clay, O'Brien | 22 min |
| Jul 31, 10:28 PM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin, Scott | 47 min |
| Jul 31, 10:30 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Clay, O'Brien | 30 min |
| Jul 31, 10:33 PM CDT | Severe Thunderstorm Warning | MPX | Dunn, Pierce | 42 min |
| Jul 31, 10:44 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Sioux | 31 min |
| Jul 31, 10:45 PM CDT | Severe Thunderstorm Warning | FSD | Lyon, Murray | 45 min |
| Jul 31, 10:51 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Ramsey, Washington | 39 min |
| Jul 31, 10:56 PM CDT | Flash Flood Warning | FSD | O'Brien | 2 hr |
| Jul 31, 11:01 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Clay, O'Brien | 14 min |
| Jul 31, 11:03 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Clay, O'Brien | 27 min |
| Jul 31, 11:11 PM CDT | Severe Thunderstorm Warning | MPX | Dunn, Eau Claire, Pepin | 64 min |
| Jul 31, 11:13 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 32 min |
| Jul 31, 11:19 PM CDT | Severe Thunderstorm Warning | MPX | Pierce, Saint Croix | 56 min |
| Jul 31, 11:32 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 28 min |
| Jul 31, 11:43 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee | 32 min |
| Aug 1, 12:16 AM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida | 44 min |
| Aug 1, 12:16 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Dunn, Eau Claire | 59 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
Minneapolis, MN (KMPX), launched 00:00Z, 2.8 hours before the alert went out and 124 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
- 465 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1194 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 191 m²/s²
- 0-3 km storm-relative helicity
- 395 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 31, 8:19 PM CDT | Mesoscale Discussion | SPC | Dickinson, Emmet, Lyon, Osceola, Winnebago | 56 min |
| Jul 31, 11:41 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cerro Gordo, Cherokee, Chickasaw, Clay and 19 more | 64 min |
| Aug 1, 1:59 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 24 more | 91 min |
| Aug 1, 5:56 AM CDT | Mesoscale Discussion | SPC | Adair, Adams, Appanoose, Audubon, Boone, Bremer and 59 more | 94 min |
| Aug 1, 12:11 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Crawford, Greene and 3 more | 64 min |
| Aug 1, 1:48 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Carroll, Cherokee, Clay, Crawford and 17 more | 117 min |
| Aug 1, 2:17 PM CDT | Mesoscale Discussion | SPC | Adair, Adams, Audubon, Cass, Clarke, Dallas and 15 more | 58 min |
| Aug 1, 3:15 PM CDT | Tornado Watch | SPC | Big Stone, Brown, Chippewa, Cottonwood, Douglas, Grant and 21 more | 7 hr |
| Aug 1, 3:41 PM CDT | Mesoscale Discussion | SPC | Kanabec, Mille Lacs, Morrison, Pine | 2 hr |
| Aug 1, 4:00 PM CDT | Severe Thunderstorm Watch | SPC | Aitkin, Benton, Chisago, Crow Wing, Isanti, Kanabec and 3 more | 5 hr |
| Jul 31, 10:27 PM CDT | Mesoscale Discussion | SPC | Antelope, Boyd, Brown, Cedar, Cherry, Holt and 5 more | 93 min |
| Aug 1, 6:35 PM CDT | Severe Thunderstorm Watch | SPC | Brown, Campbell, Corson, Dewey, Edmunds, Faulk and 4 more | 3 hr |
| Aug 1, 6:25 PM CDT | Mesoscale Discussion | SPC | Langlade, Lincoln, Menominee, Oneida, Price, Shawano | 65 min |
Nearby
Severe Thunderstorm Watches in Minnesota, 2004Severe Thunderstorm Watches in Iowa, 2004Severe Thunderstorm Watches in Wisconsin, 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.