Alert archive / Wisconsin / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 237
The Storm Prediction Center issued this severe thunderstorm watch at May 21, 2004, 3:00 PM CDT for 25 counties in Wisconsin. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 21, 2004, 3:00 PM CDT (20:00 UTC)
- Expired
- May 21, 2004, 10:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 25 counties
Adams County, WI, Calumet County, WI, Columbia County, WI, Dane County, WI, Dodge County, WI, Fond du Lac County, WI, Green County, WI, Green Lake County, WI, Iowa County, WI, Jefferson County, WI, Juneau County, WI, Kenosha County, WI, Lafayette County, WI, Marquette County, WI, Milwaukee County, WI, Ozaukee County, WI, Racine County, WI, Rock County, WI, Sauk County, WI, Sheboygan County, WI, Walworth County, WI, Washington County, WI, Waukesha County, WI, Waushara County, WI, Winnebago County, WI
The radar
The Milwaukee radar (KMKX), 89 km from the middle of the area, began a volume at 20:01 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
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 21, 3:16 PM CDT | Severe Thunderstorm Warning | MKX | Sauk | 29 min |
| May 21, 3:41 PM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane | 49 min |
| May 21, 6:17 PM CDT | Flash Flood Warning | MKX | Kenosha, Racine, Walworth | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Green Bay/Straub, WI (KGRB), launched 12:00Z, 8.0 hours before the alert went out and 133 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
- 1440 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 82 m²/s²
- 0-3 km storm-relative helicity
- 196 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 20, 7:32 PM CDT | Mesoscale Discussion | SPC | Kenosha | 88 min |
| May 21, 4:34 AM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Columbia, Crawford, Dane, Grant and 15 more | 56 min |
| May 21, 9:40 AM CDT | Mesoscale Discussion | SPC | Kenosha | 2 hr |
| May 21, 9:44 AM CDT | Mesoscale Discussion | SPC | Adams, Buffalo, Crawford, Eau Claire, Grant, Jackson and 9 more | 3 hr |
| May 21, 10:25 AM CDT | Severe Thunderstorm Watch | SPC | Adams, Buffalo, Columbia, Crawford, Dane, Dodge and 21 more | 6 hr |
| May 21, 1:59 PM CDT | Mesoscale Discussion | SPC | Adams, Columbia, Crawford, Dane, Dodge, Fond du Lac and 10 more | 2 hr |
| May 21, 2:45 PM CDT | Tornado Watch | SPC | Crawford, Grant, Richland | 7 hr |
| May 21, 5:35 PM CDT | Tornado Watch | SPC | Lafayette | 5 hr |
Nearby
Severe 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.