Alert archive / Iowa / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 220
The Storm Prediction Center issued this severe thunderstorm watch at May 19, 2004, 5:35 PM CDT for 30 counties in Iowa; 8 counties in Minnesota. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 19, 2004, 5:35 PM CDT (22:35 UTC)
- Expired
- May 19, 2004, 11:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 38 counties
Adair County, IA, Audubon County, IA, Boone County, IA, Calhoun County, IA, Carroll County, IA, Cass County, IA, Cerro Gordo County, IA, Dallas County, IA, Emmet County, IA, Franklin County, IA, Greene County, IA, Guthrie County, IA, Hamilton County, IA, Hancock County, IA, Hardin County, IA, Humboldt County, IA, Jasper County, IA, Kossuth County, IA, Madison County, IA, Marion County, IA, Marshall County, IA, Palo Alto County, IA, Pocahontas County, IA, Polk County, IA, Story County, IA, Warren County, IA, Webster County, IA, Winnebago County, IA, Worth County, IA, Wright County, IA, Blue Earth County, MN, Dodge County, MN, Faribault County, MN, Freeborn County, MN, Martin County, MN, Steele County, MN, Waseca County, MN, Watonwan County, MN
The radar
The Des Moines radar (KDMX), 80 km from the middle of the area, began a volume at 22:37 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 5:41 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth | 49 min |
| May 19, 5:57 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 33 min |
| May 19, 6:13 PM CDT | Severe Thunderstorm Warning | DMX | Kossuth | 47 min |
| May 19, 6:24 PM CDT | Severe Thunderstorm Warning | DMX | Emmet | 21 min |
| May 19, 7:00 PM CDT | Severe Thunderstorm Warning | DMX | Hancock, Kossuth, Winnebago | 60 min |
| May 19, 7:52 PM CDT | Severe Thunderstorm Warning | DMX | Cerro Gordo, Worth | 53 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
Omaha, NE (KOAX), launched 12:00Z, 10.6 hours before the alert went out and 214 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
- 36 J/kg
- Mixed-layer CIN
- -325 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 3:03 PM CDT | Mesoscale Discussion | SPC | Buena Vista, Cherokee, Clay, Dickinson, Emmet, Lyon and 5 more | 117 min |
| May 19, 2:35 PM CDT | Mesoscale Discussion | SPC | Clay, Kittson, Marshall, Norman, Pennington, Polk and 2 more | 115 min |
| May 19, 3:00 PM CDT | Tornado Watch | SPC | Clay, Norman | 5 hr |
| May 19, 6:09 PM CDT | Mesoscale Discussion | SPC | Clay, Norman | 96 min |
Nearby
Severe Thunderstorm Watches in Iowa, 2004Severe Thunderstorm Watches in Minnesota, 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.