Alert archive / Iowa / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 320
The Storm Prediction Center issued this severe thunderstorm watch at May 28, 2004, 9:50 PM CDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 28, 2004, 9:50 PM CDT (02:50 UTC)
- Expired
- May 29, 2004, 3:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 45 counties
Buena Vista County, IA, Calhoun County, IA, Cherokee County, IA, Clay County, IA, Dickinson County, IA, Emmet County, IA, Hamilton County, IA, Humboldt County, IA, Ida County, IA, Kossuth County, IA, Lyon County, IA, O'Brien County, IA, Osceola County, IA, Palo Alto County, IA, Plymouth County, IA, Pocahontas County, IA, Sac County, IA, Sioux County, IA, Webster County, IA, Woodbury County, IA, Wright County, IA, Brown County, MN, Cottonwood County, MN, Jackson County, MN, Lincoln County, MN, Lyon County, MN, Martin County, MN, Murray County, MN, Nobles County, MN, Pipestone County, MN, Redwood County, MN, Rock County, MN, Watonwan County, MN, Dakota County, NE, Brookings County, SD, Clay County, SD, Kingsbury County, SD, Lake County, SD, Lincoln County, SD, McCook County, SD, Miner County, SD, Minnehaha County, SD, Moody County, SD, Turner County, SD, Union County, SD
The radar
The Sioux Falls radar (KFSD), 102 km from the middle of the area, began a volume at 02:53 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
22 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 9:57 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth, Sioux | 33 min |
| May 28, 9:57 PM CDT | Tornado Warning | FSD | Woodbury | 18 min |
| May 28, 10:15 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 15 min |
| May 28, 10:17 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 13 min |
| May 28, 10:27 PM CDT | Severe Thunderstorm Warning | DMX | Crawford, Sac | 33 min |
| May 28, 10:30 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 45 min |
| May 28, 10:32 PM CDT | Severe Thunderstorm Warning | FSD | Plymouth | 28 min |
| May 28, 10:58 PM CDT | Severe Thunderstorm Warning | FSD | Ida | 62 min |
| May 28, 11:13 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee | 32 min |
| May 28, 11:25 PM CDT | Severe Thunderstorm Warning | FSD | Miner | 35 min |
| May 28, 11:31 PM CDT | Severe Thunderstorm Warning | DMX | Sac | 59 min |
| May 28, 11:45 PM CDT | Severe Thunderstorm Warning | FSD | Dickinson | 30 min |
| May 28, 11:47 PM CDT | Severe Thunderstorm Warning | FSD | Murray | 28 min |
| May 28, 11:53 PM CDT | Tornado Warning | DMX | Sac | 37 min |
| May 29, 12:02 AM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 28 min |
| May 29, 12:07 AM CDT | Severe Thunderstorm Warning | FSD | Lake, Miner | 38 min |
| May 29, 12:28 AM CDT | Severe Thunderstorm Warning | DMX | Calhoun | 47 min |
| May 29, 12:28 AM CDT | Severe Thunderstorm Warning | FSD | Brookings | 32 min |
| May 29, 12:34 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood | 26 min |
| May 29, 12:55 AM CDT | Severe Thunderstorm Warning | MPX | Martin, Watonwan | 50 min |
| May 29, 12:59 AM CDT | Severe Thunderstorm Warning | FSD | Cottonwood | 16 min |
| May 29, 1:11 AM CDT | Severe Thunderstorm Warning | DMX | Webster | 64 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 205 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
- 1608 m above ground
- 0-6 km bulk shear
- 58 kt
- 0-1 km storm-relative helicity
- 72 m²/s²
- 0-3 km storm-relative helicity
- 163 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 |
|---|---|---|---|---|
| May 28, 7:31 PM CDT | Mesoscale Discussion | SPC | Cherokee, Crawford, Harrison, Ida, Lyon, Monona and 6 more | 89 min |
| May 28, 9:03 PM CDT | Mesoscale Discussion | SPC | Audubon, Buena Vista, Calhoun, Carroll, Cherokee, Clay and 24 more | 57 min |
| May 28, 11:41 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 16 more | 94 min |
| May 29, 12:42 PM CDT | Mesoscale Discussion | SPC | Adair, Appanoose, Audubon, Boone, Buena Vista, Calhoun and 45 more | 93 min |
| May 29, 2:05 PM CDT | Tornado Watch | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 13 more | 8 hr |
| May 29, 3:05 PM CDT | Tornado Watch | SPC | Carroll, Crawford, Fremont, Harrison, Mills, Monona and 4 more | 7 hr |
| May 29, 4:35 PM CDT | Tornado Watch | SPC | Adair, Adams, Boone, Cass, Clarke, Dallas and 15 more | 5 hr |
| May 29, 5:01 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Calhoun, Cherokee, Clay, Dickinson, Emmet and 13 more | 119 min |
| May 29, 3:25 PM CDT | Severe Thunderstorm Watch | SPC | Becker, Clay, Douglas, Grant, Norman, Otter Tail and 2 more | 6 hr |
| May 29, 1:02 PM CDT | Mesoscale Discussion | SPC | Adams, Clay, Fillmore, Franklin, Gage, Hall and 10 more | 118 min |
| May 29, 1:54 PM CDT | Mesoscale Discussion | SPC | Chase, Dundy, Frontier, Hayes, Hitchcock, Perkins and 1 more | 3 hr |
| May 29, 3:55 PM CDT | Severe Thunderstorm Watch | SPC | Dundy, Furnas, Hitchcock, Red Willow | 6 hr |
| May 29, 5:16 PM CDT | Mesoscale Discussion | SPC | Adams, Boone, Buffalo, Clay, Custer, Dawson and 20 more | 59 min |
| May 29, 5:53 PM CDT | Mesoscale Discussion | SPC | Hayes, Hitchcock, Red Willow | 67 min |
Nearby
Severe Thunderstorm Watches in Iowa, 2004Severe Thunderstorm Watches in Minnesota, 2004Severe Thunderstorm Watches in South Dakota, 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.